Elasticsearch

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 Efficiently Counting Items in an Elasticsearch Index

In this article, we will discuss different approaches to count items in an index, their advantages, and limitations.

 Elasticsearch Percolate Query

Learn how to use the advanced features of Elasticsearch's Percolate Query. This guide covers use cases, tips for optimization and more

_source

Elasticsearch keeps the original JSON document in a field called _source. The source field serves special purposes such as...

A Comprehensive Guide to Elasticsearch Installation

This article will guide you through the process of installing Elasticsearch on different platforms, including Linux, Windows, and macOS.

Adding Certificate Passwords to the Elasticsearch Keystore

Here's how to add certificate passwords to the Elasticsearch keystore, ensuring your cluster is secure and encrypted.

Advanced Guide to Facets in Elasticsearch

Facets are a key component of Elasticsearch, providing a powerful way for you to get more insight into your data. To implement...

Aggregation

The aggregations framework is a tool built in every Elasticsearch deployment. The different aggregation types: Bucket, Metric & Pipeline...

Alias

In Elasticsearch, an alias is a secondary name to refer to one or more indices. Aliases can be created and deleted dynamically using...

All Script Types are Allowed to Run

Elasticsearch scripts can place heavy loads on clusters if they are not written carefully. It is a best practice to limit the type of..

An Overview of Source Filtering, Stored Fields, Fields and Docvalues Fields

There are various methods for retrieving fields in Elasticsearch, including: _source, stored_fields, fields & docvalue_fields. To retrieve...

Autocomplete Search

There are various approaches for autocomplete in Elasticsearch. Here are some tips & examples for choosing the approach best suited to your...

Bootstrap Checks

Elasticsearch carries out "bootstrap checks" to ensure that important settings have been set correctly. If any of these fail, ES won't start.

Bootstrap Memory_Lock is Set to False

Elasticsearch can be configured to prevent memory swapping on its host machine by adding bootstrap memory_lock true. If bootstrap checks...

Bulk

Elasticsearch bulk makes it possible to perform many write operations in a single API call, which increases indexing speed. Using bulk API...

Cache: Node Request, Shard Data & Field Data Cache

Elasticsearch uses 3 types of caches to improve the efficiency of operation: node requests, shards and field data cache. It is possible to...

Check Elasticsearch Version

In this article, we'll discuss how to check the Elasticsearch version using various methods Method 1: Using the REST API....

Choosing the right amount of memory based on number of shards in Elasticsearch

If the ratio of memory to number of shards in the cluster is low, it suggests that you have insufficient memory compared to the volume...

Circuit Breakers

Elasticsearch has circuit breakers to deal with OutOfMemory errors that cause nodes to crash. Each breaker is used to...

Client

Official Elasticsearch clients are available for java, javascript, Perl, PHP, python, ruby and .NET. To avoid surprises, keep your client....

Cluster

An Elasticsearch cluster consists of a number of servers (nodes) working together as one to store data and respond to requests. It enables...

Cluster Blocks Read-Only

A read-only delete block can be applied automatically by the cluster because of a disk space issue. It can also be applied manually by...

Cluster Concurrent Rebalance High / Low

The cluster concurrent rebalance setting determines the maximum number of shards the cluster can move to rebalance the distribution of...

Combined_Fields Query Type in Elasticsearch

In Elasticsearch, the combined_fields query allows you to search several text fields as though their indexed values have been indexed into...

Comparing Vector Search in OpenSearch vs. Elasticsearch

Here is a comparative analysis of vector search as implemented by OpenSearch and Elasticsearch. Vector search implementation...

Configuring Elasticsearch for Optimal Performance

This article will discuss advanced configuration options and best practices to help you fine-tune your Elasticsearch.

Configuring HTTP Settings in Elasticsearch

This guide explains the Elasticsearch HTTP settings, including module settings and HTTP compression, CORS & pipelining configuration.

Console Query Example in Elasticsearch

In this guide, we'll dive into Elasticsearch console query examples, focusing on techniques & tips that can help you optimize your queries.

Counting Unique Values in Elasticsearch: An In-depth Guide

In this article, we will delve into the process of counting unique values in Elasticsearch using the cardinality aggregation feature.

Creating an Index with Mapping in Elasticsearch

In this article, we will delve into the process of creating an index with mapping in Elasticsearch. Mapping is the process of defining how...

Creating and Managing Users in Elasticsearch

This article will delve into the process of creating and managing users in Elasticsearch, focusing on the built-in functionality provided...

Creating API Keys in Elasticsearch: An Advanced Guide

This article will delve into the process of creating API keys in Elasticsearch and how to manage API keys.

Cross-Cluster Search in Elasticsearch & OpenSearch

Cross-cluster search enables users to execute a query across multiple Elasticsearch or OpenSearch clusters. To perform cross cluster search...

Dangerous Default Settings

Cluster name and data path are default settings that could be destructive for proper Elasticsearch function if handled incorrectly. If you...

Data Prepper vs. Logstash – A Complete Comparison

In this guide, we'll compare Logstash, the flagship ingestion tool of the ELK & Data Prepper, OpenSearch’s ingestion tool response.

Dedicated Client Nodes

Many clusters use coordinating or ingest nodes, while others leave the ingest and coordination functions to the data nodes. In order to...

Dedicated Master Node

Once an Elasticsearch cluster reaches a certain size, it's recommended to create 3 dedicated master nodes. Here is how you can create...

Deep Dive into Elasticsearch Endpoints

The main Elasticsearch endpoints can be categorized into these types: Cluster APIs, Index APIs, Document APIs, and Search APIs. To use them...

Deep Dive into X-Pack Elasticsearch: Advanced Features and Implementation

X-Pack is an Elastic Stack extension that bundles security, alerting, monitoring, reportin & graph capabilities into one package. To setup...

DELETE

DELETE is an Elasticsearch API which removes a document from a specific index. It requires an index name and _id document in order to...

Delete By Query

Elasticsearch delete by query is an API, which provides functionality to delete all documents based on the matching query. If you don't...

Deleting a Field from a Document in Elasticsearch

In this article, we will discuss different methods to delete a field from a document in Elasticsearch, along with...

Deleting Elasticsearch Indices Using cURL

In this article, we will discuss how to delete Elasticsearch indices using cURL, a command-line tool for transferring data with URLs.

Deploying Elasticsearch Using Docker Hub

In this article, we will delve into the process of deploying Elasticsearch using Docker Hub. Docker Hub is a cloud-based repository where...

Deploying Elasticsearch Using Helm Charts

This article will guide you through the process of deploying Elasticsearch using Helm Charts. Helm is a package manager for Kubernetes...

Deprecation

To find out which functions have been deprecated in Elasticsearch, you can use deprecation logs, deprecation API, read breaking pages...

Determining Elasticsearch Version: A Comprehensive Guide

In this article, we will discuss various methods to determine the Elasticsearch version, including using REST APIs...

Disabling Security in Elasticsearch: A Quick Guide

This article will guide you through the process of disabling and re-enabling security in Elasticsearch. The 1st step to disable security...

Discovery

Discovery occurs when an Elasticsearch node starts, restarts or loses contact with the master node. In those cases the node needs to...

Disk Underutilization on Cold Tier in Elasticsearch

Follow the steps mentioned in this guide to resolve the issue of disk underutilization on the cold tier in Elasticsearch.

Disk Watermark

There are various watermark thresholds on an Elasticsearch cluster. As the disk fills up on a node, the 1st threshold to be crossed is...

DiskThreshold

Elasticsearch uses several parameters to enable it to manage hard disk storage across the cluster, such as...

Displaying Fields in an Elasticsearch Index

In this article, we will discuss how to display fields in an Elasticsearch index. This can be useful for understanding the structure...

Document

Each Elasticsearch document is a JSON structure, which is ultimately considered to be a series of key:value pairs. An example for creating...

Efficiently Deleting Snapshots in Elasticsearch

In this guide, we'll discuss how to efficiently delete Elasticsearch snapshots, including the prerequisites, the procedure & how to automate.

Efficiently Searching by Document ID in Elasticsearch

In this article, we will discuss the different methods to search by document ID in Elasticsearch, their performance implications...

Elastic Pricing Calculator - How to Use the Elastic Pricing Calculator

The different categories in the Elastic Pricing Calculator can impact your final cost. Here's how to efficiently use the pricing calculator.

Elasticsearch _Score

In this article, we will delve into the factors affecting _score and how to optimize it for better search performance.

Elasticsearch - Many Index Get Requests with Missing Documents

When you try to retrieve a document by ID, Elasticsearch will count the number of times that it searches for an ID which doesn't exist...

Elasticsearch "Allocation Explain API” - How to Analyze the Cluster Allocation Explain API

Elasticsearch cluster allocation explain API helps identify why a shard is unassigned or not relocated. The _cluster/allocation/explain...

Elasticsearch Aggregation Count: Advanced Techniques and Optimization

In this article, we will explore advanced techniques and optimizations for count aggregations in Elasticsearch.

Elasticsearch Aggregation on Multiple Fields: A Comprehensive Guide

In this article, we will explore how to perform aggregations on multiple fields in Elasticsearch, including different types...

Elasticsearch Aggregation Query

Learn how to use Elasticsearch aggregation queries and explore various types of aggregations including metrics, bucketing, and pipeline.

Elasticsearch Aggregations Pagination: Efficient Techniques for Large Result Sets

In this article, we will discuss various techniques for paginating aggregations in Elasticsearch. It's essential to paginate the results...

Elasticsearch Analytics - How to Leverage Data Frame Analytics in Elasticsearch

Elasticsearch data frame analytics allows you to supercharge your data with extra insights. There are 3 types of data frame analytic jobs...

Elasticsearch Analytics: Advanced Techniques for Data Analysis

In this guide, we'll discuss techniques for data analysis using Elasticsearch, focusing on aggregations, machine learning, and custom scoring.

Elasticsearch Array Match: Querying and Filtering Techniques

This article will discuss various techniques to perform array matching in Elasticsearch, including the use of...

Elasticsearch Async Search

The Elasticsearch async search API retrieves many data in a stream fashion instead of a single request. To limit the maximum response size...

Elasticsearch Boolean Queries

There are 4 types of Elasticsearch boolean clauses: filter, must, should & must_not. A single bool query can contain a mix of them. To use...

Elasticsearch Boosting Query

Elasticsearch boosting query is used to return only documents that match a positive query while minimizing the score of documents that...

Elasticsearch Bulk Processor: Optimizing Bulk Indexing Operations

In this article, we will discuss the benefits of using the Elasticsearch Bulk Processor, its configuration options, and best...

Elasticsearch Capacity Planning: A Comprehensive Guide

In this guide, we'll discuss the key factors to consider when planning for Elasticsearch capacity and provide guidelines on...

Elasticsearch Cardinality - Low + High Cardinality Fields

In this guide, we'll go over Elasticsearch cardinality, high & low cardinality fields, how to determine field cardinality, and give examples.

Elasticsearch Cat Shards: A Comprehensive Guide

In this article, we will explore the cat shards API, its usage, how to interpret the output and more. The _cat/shards...

Elasticsearch categorize_text Aggregation

The Elasticsearch aggregation 'categorize_text' helps analyze & extract categories from semi-structured text. To use this aggregation...

Elasticsearch Change Field Type: A Comprehensive Guide

This article guides you through the process of changing the field type in Elasticsearch, including the reasons for doing so...

Elasticsearch Circuit Breaker Exceptions: How to Handle Circuit Breakers

Circuit breaker exceptions are thrown to alert us that something needs to be fixed in Elasticsearch in order to reduce memory usage. To fix...

Elasticsearch Clone Index: A Comprehensive Guide

In this article, we will discuss the process of cloning an Elasticsearch index, its benefits, and some best practices to follow.

Elasticsearch Cluster Concurrent Rebalance Issues

In this article, we'll discuss why cluster concurrent rebalance issues occur, their impact, consequences and resolution, including examples.

Elasticsearch cluster health

This article will discuss the key aspects of cluster health, how to interpret the health status, and steps to improve it.

Elasticsearch Cluster State

Elasticsearch clusters need to maintain the cluster state in memory on each and every nodes, which requires a large amount of resources...

Elasticsearch Collapse

This guide discusses the Elasticsearch collapse feature, including use cases, how to implement it, and best practices for optimizing...

Elasticsearch Composite Aggregations

An Elasticsearch composite aggregation allows to paginate every bucket from a multi-level aggregation effectively. An example of....

Elasticsearch Compression

Elasticsearch provides various compression techniques to optimize storage and network usage. Here's how to compress an index, source and...

Elasticsearch Configuring Optimal Dedicated Master Nodes

Ideally, Elasticsearch clusters should have three dedicated master nodes and no other nodes with master roles. If you have other nodes...

Elasticsearch Constant Score Query

In Elasticsearch, the constant score query wraps other queries by executing them in a filter context. To implement constant_score query...

Elasticsearch Coordinating Node - When to Use Coordinating Only Nodes

A coordinating node is a node that handles HTTP(S) requests for the cluster, especially indexing & search requests. A coordinating only...

Elasticsearch Coordinating Nodes - When Should You Use Coordinator Nodes?

What is the role of coordinator nodes, when should they be deployed, impact on indexing and searching and frequently asked questions on...

Elasticsearch Copy Index: A Comprehensive Guide

In this article, we will discuss different methods to copy an index in Elasticsearch, along with their advantages and potential pitfalls.

Elasticsearch Cost Optimization: 12 Expert Tips 

Here are 12 tips to reduce and optimize your Elasticsearch costs. First, plan data retention: carefully adjust your...

Elasticsearch Count Distinct

Explore how to use Elasticsearch's cardinality aggregation feature for counting distinct field occurrences in datasets.

Elasticsearch Count Query: Advanced Techniques and Optimization

This article will discuss advanced techniques and optimization tips for using Elasticsearch count query effectively.

Elasticsearch Cross-Index Query: Advanced Techniques and Best Practices

In this article, we will discuss advanced techniques and best practices for performing cross-index queries in Elasticsearch.

Elasticsearch Curl Delete

This guide will focus on how to use cURL to perform delete operations in Elasticsearch. It covers best practices, common issues & examples.

Elasticsearch Data Ingestion: Advanced Techniques and Best Practices

This article will discuss advanced techniques and best practices for data ingestion in Elasticsearch, focusing on the following topics...

Elasticsearch Data Nodes: Optimizing Performance and Resource Utilization

In this article, we will discuss how to optimize data nodes for better performance and resource utilization.

Elasticsearch Data Stream

The Elasticsearch data stream is an abstraction layer between the names used by applications to facilitate ingestion and search operations...

Elasticsearch Date Format

In this article, we will discuss the best practices and customization options for date formats in Elasticsearch.

Elasticsearch Date Histogram: Advanced Usage and Optimization Techniques

In this article, we will discuss advanced usage and optimization techniques for Elasticsearch date histograms.

Elasticsearch Date Range

Discover how to use date range queries in Elasticsearch to filter documents, guided by step-by-step instructions and examples.

Elasticsearch Delete By ID: Advanced Usage and Best Practices

In this guide, we'll discuss advanced usage & best practices for using the Elasticsearch Delete By ID API, including bulk delete by ID.

Elasticsearch Delete Document

In this guide, we will discuss the process of deleting documents in Elasticsearch as well as best practices for deleting documents.

Elasticsearch Delete Index

Here's how to delete an index in Elasticsearch as well as some best practices & potential issues to be aware of while deleting an index.

Elasticsearch Disable SSL: Securing Your Cluster Without SSL/TLS

Here's how to disable SSL/TLS in Elasticsearch and some alternative security measures to ensure your cluster remains protected.

Elasticsearch Disaster Recovery: Strategies and Best Practices

This guide delves into the strategies and best practices for Elasticsearch disaster recovery. To recover from a disaster...

Elasticsearch Disk Underutilization on Data Tier

If there is more disk space allocated to data nodes in the Elasticsearch cluster than needed, this means that the disk resources are...

Elasticsearch Disk Underutilization on Warm Tier

If there is more disk space allocated to warm nodes in the Elasticsearch cluster than needed, the disk resources are not being utilized...

Elasticsearch doc-values-only Fields

This guide explains the purpose of the doc values structure and shows examples of usage of the Elasticsearch doc-values-only fields.

Elasticsearch Document Size Limit

This guide discusses the default document size limit in Elasticsearch, the reasons behind it, and how to handle larger documents effectively.

Elasticsearch DSL Exists Query

The exists query is used for returning the documents that have an indexed value for a specific field, which means it returns the documents...

Elasticsearch Dynamic Mapping: Advanced Insights and Best Practices

In this article, we will delve into the advanced aspects of dynamic mapping, its benefits, and best practices for optimizing its usage.

Elasticsearch Exact Match

In this article, we will discuss various techniques and best practices for exact match searches in Elasticsearch.

Elasticsearch Excessive Replicas on Cold Nodes

Elasticsearch excessive replicas on cold nodes occurs when the Elasticsearch cluster is not optimally configured. To resolve this issue...

Elasticsearch Excessive Replicas on Hot Nodes

Having too many replicas for certain indices on the hot tier of your Elasticsearch cluster can lead issues. To resolve this...

Elasticsearch Excessive Replicas on Warm Nodes

Having more replicas than necessary on the warm tier of your cluster can lead to inefficient resource usage & impact performance To resolve...

Elasticsearch Exists Filter

Learn how to use the exists filter with documents where a specified field contains non-null values.

Elasticsearch explain

In this guide, we'll dive into the Elasticsearch Explain API, its use cases & how to effectively leverage it for better search performance.

Elasticsearch Explain API

The Elasticsearch Explain API is very useful for trying to understand why any particular document got a specific score. Examples of...

Elasticsearch Explain Query

Learn how to use Elasticsearch's Explain Query to get detailed scoring computations and understand why one document ranks above another.

Elasticsearch field is not empty

This article will guide you through the process of querying Elasticsearch for documents where a specific field is not empty.

Elasticsearch Field Size - How to Calculate the Storage Size of Specific Fields in an Index 

The 3 main methods in Elasticsearch to calculate the storage size of specific fields in an index are: using the _disk_usage API, creating...

Elasticsearch Filter Aggregation: Advanced Usage and Optimization Techniques

In this article, we will explore advanced usage and optimization techniques for Elasticsearch filter aggregation.

Elasticsearch Filter Query

Learn how to implement, understand, and optimize Elasticsearch's filter queries for structured search, improving both speed and efficiency.

Elasticsearch Filtered Aliases

Elasticsearch filtered aliases can help you filter data more efficiently. To create a filtered alias, you need to define the criteria for...

Elasticsearch Find Document by Field Value

In this guide, we'll discuss various methods to find documents in Elasticsearch by field value and give examples for each method.

Elasticsearch Function Score: Boosting Relevance with Custom Scoring

In this guide, we'll dive into the details of Elasticsearch Function Score and explore how to use it effectively to improve search results.

Elasticsearch Fuzzy Match: Advanced Techniques and Best Practices

Elasticsearch offers advanced techniques for implementing fuzzy matching such as fuzzy query, n-grams, and custom analyzers. To implement...

Elasticsearch Fuzzy Query

Elasticsearch fuzzy queries offer a powerful way to handle imprecise search terms. To fine-tune the behavior of fuzzy queries...

Elasticsearch Geo Bounding Box

Learn how to use the Geo Bounding Box query in Elasticsearch to retrieve documents within a specific geographical area with this guide.

Elasticsearch Geo Distance

Discover how to use the Geo-Distance query, guided by step-by-step instructions and examples to help you make the most of this feature.

Elasticsearch Get All Documents

Learn how to retrieve all documents from an Elasticsearch index. With step-by-step instructions of different methods such as the Scroll API.

Elasticsearch Get Settings

Learn how use Get Settings API in Elasticsearch to retrieve and manage index settings and optimize cluster's performance and stability.

Elasticsearch Get Source

Learn how to use Elasticsearch Get Source API for document retrieval and explore features like partial retrieval and _source field disabling.

Elasticsearch Global Ordinals, Eager Global Ordinals & High Cardinality Fields

Terms aggregations rely on an internal data structure known as global ordinals. The eager_global_ordinals parameter is used to...

Elasticsearch Group By

Learn how to perform "group by" operations in Elasticsearch, with examples and step-by-step instructions to guide you through the process.

Elasticsearch Group by Date

Learn how to group data by date fields in Elasticsearch using Date Histogram Aggregation. With step-by-step basic and advanced techniques.

Elasticsearch Group By Field: Aggregations and Bucketing Techniques

In this article, we will explore different techniques to group documents by a field using Elasticsearch aggregations and bucketing.

Elasticsearch Hardware Requirements: A High-Level Overview

This guide discusses the hardware and configuration requirements for Elasticsearch, including: CPU, memory, storage & network requiriements.

Elasticsearch Has-Child

Learn how to implement and query parent-child relationships. Understand how it differs from nested objects, its use-cases, and limitations.

Elasticsearch Health Check Curl

A common method to perform an Elasticsearch health check is by using cUR. Here's how to use cURL to check the health of your cluster.

Elasticsearch Health Check: Monitoring and Troubleshooting Cluster Health

Here are methods to monitor and troubleshoot the health of your Elasticsearch cluster, including using APIs, interpreting health status...

Elasticsearch High Indexing Throttle Time

When Elasticsearch detects that the merge process cannot keep up with the rate of indexing, then it will start to throttle indexing...

Elasticsearch High Level REST Client Deprecated

The Elasticsearch High Level REST Client has been deprecated since v7.7.0. Here is why it was deprecated, the alternatives available & more.

Elasticsearch Hot Threads: Identifying and Troubleshooting Performance Issues

This article will discuss the importance of hot threads, how to analyze them, and provide guidance on resolving common performance problems.

Elasticsearch Hot Warm

This article will discuss the benefits of using a hot-warm architecture and provide a step-by-step guide to setting up...

Elasticsearch Hotspots - Load Balancing, Data Allocation and How to Avoid Hotspots

"Hotspots" refers to a situation in which a cluster with multiple nodes is not balanced - some nodes are handling more load than others...

Elasticsearch How to Reduce the Number of Replicas on Content Nodes

This is an indication that there is an opportunity to optimize the Elasticsearch cluster by reducing the number of replicas for...

Elasticsearch How to Search: Advanced Search Techniques in Elasticsearch

This article will delve into some of the more advanced techniques that can be used to optimize and refine your search...

Elasticsearch Hybrid Search

This guide covers the different types of hybrid search queries supported by Elasticsearch, its limitations, optimizations, and more.

Elasticsearch ids query

In this article, we will explore the Elasticsearch IDs query, its advantages, and how to use it effectively.

Elasticsearch Index Alias

Learn step-by-step techniques for creating, managing, and leveraging Elasticsearch's index aliases effectively.

Elasticsearch Index API

Here's how you can optimize your Elasticsearch index API usage and improve the performance and reliability of your cluster.

Elasticsearch Index Exists

Learn how to check if an Elasticsearch index exists using REST APIs. This guide provides step-by-step examples using the HEAD and GET methods

Elasticsearch Index Management

Efficient management of Elasticsearch indices is crucial for maintaining optimal performance. The best practices to manage your index list...

Elasticsearch Index Number_of_Replicas

Learn how to configure the `number of replicas` setting, its implications on performance, and best practices for optimizing your cluster.

Elasticsearch Index Pattern

Elasticsearch index patterns allow you to define how to match & interact with multiple indices. The best practices for index pattern usage...

Elasticsearch Index Settings

Discover how to use Elasticsearch index settings. Learn the difference between static and dynamic settings, methods for updating them & more.

Elasticsearch Indexing Downtime (Customer Post Mortem)

When looking at Shard View for the index, it was clear that the index in question wasn’t carrying out the highest indexing rate and wasn’t...

Elasticsearch Indexing Failure 

In this guide, we'll go over the reasons why indexing operations may fail in Elasticsearch, its consequences and how to resolve this issue.

Elasticsearch Indexing Issues in Data Tiers

Elasticsearch indexing issues in data tiers can lead to several issues, including reduced performance & data inconsistency. To resolve this...

Elasticsearch Indexing Performance

Learn how to optimize Elasticsearch indexing performance with bulk indexing, refresh interval adjustments, and buffer size tuning, and more.

Elasticsearch Indices Without Replicas

Elasticsearch indices may not have replica shards, this can occur due to various reasons. To resolve this issue you need too...

Elasticsearch Ingest Data - Index API, Bulk API, Filebeat & Kibana Import Wizard

This guide reviews several ways users can ingest data into Elasticsearch, including using index & Bulk API, Filebeat & Kibana Import Wizard.

Elasticsearch Inner Hit

Learn how to retrieve nested objects and manage parent-child document relationships, with practical examples and step-by-step instructions

Elasticsearch Insert Document

This guide will discuss best practices & performance optimization techniques for inserting documents into Elasticsearch. First, use the API...

Elasticsearch Interval Queries

Elasticsearch Intervals query provides control over the words & their positions in a text that is required for a document to match a...

Elasticsearch Java Heap Size

Here's how to optimize the Elasticsearch Java Heap Size to ensure efficient resource utilization & prevent OutOfMemoryError issues.

Elasticsearch Json Array

Learn how to use JSON Arrays in Elasticsearch with this comprehensive guide on Indexing, Querying, and Dealing with Nested JSON Structures.

Elasticsearch Keystore Path: Managing Secure Settings

This article will discuss the Elasticsearch keystore path, how to manage secure settings, and best practices for maintaining security.

Elasticsearch Keyword vs. Text

Elasticsearch keyword vs. text vs. wildcard vs. text field types. All have different features and are ideal for different use cases

Elasticsearch knn

In this article, we will discuss advanced techniques and optimization strategies for kNN search in Elasticsearch. We will cover: indexing...

Elasticsearch Large Cluster State - How to Discover, Resolve and Prevent (Customer Post Mortem)

When cluster state becomes too large it poses many challenges. In order to determine the size of your cluster state and reduce it, you...

Elasticsearch License Expired - How to Handle Expired Elasticsearch Licenses

Elasticsearch will continue to work even if your license expires, but the paid features will be blocked. To buy a new license and update it...

Elasticsearch Limit Results: Optimizing Query Performance and Pagination

In this article, we will discuss different techniques to limit the number of results returned by Elasticsearch & limitations to keep in mind.

Elasticsearch Logging: Enabling and Configuring Log Levels

In this article, we will discuss how to enable and configure logging in Elasticsearch, focusing on log levels, log formats, and log rotation.

Elasticsearch Long Running Bulk Index Task

A long running bulk index task in Elasticsearch refers to a situation where the process of indexing a large amount of data takes...

Elasticsearch Long Running DeleteByQuery Task

DeleteByQuery operations in Elasticsearch may take an unusually long time to complete. DeleteByQuery is a feature in Elasticsearch...

Elasticsearch Long Running Index Task

A long running index task in Elasticsearch refers to an indexing operation that is taking an unusually long time to complete. To resolve

Elasticsearch Long Running Reindex Task

A long running reindex task in Elasticsearch refers to a reindexing process that is taking an unusually long time to complete...

Elasticsearch Long Running Search Task Issues

A long running search task in Elasticsearch refers to a search query that takes an unusually long time to complete. To resolve...

Elasticsearch Long Running Shard Tasks

A long running shard task in Elasticsearch refers to a task that is taking an unusually long time to complete. To resolve...

Elasticsearch Long Running Snapshot Task Issues

In Elasticsearch, snapshot operations may take an unusually long time to complete. Snapshots are backups of your Elasticsearch indices...

Elasticsearch Long Running Stuck Tasks

In this guide, we'll discuss why tasks may become stuck in Elasticsearch, the impact of long-running stuck tasks & how to resolve the issue.

Elasticsearch Long Running UpdateByQuery Task 

The impact of a long running Elasticsearch UpdateByQuery task can be great, as it may affect the performance of the cluster. To resolve...

Elasticsearch Lowercase Analysis

Learn how to ensure case-insensitive matching by lowercasing tokens and how to create custom analyzers and normalizers for text analysis.

Elasticsearch Many Empty Shards in Cluster

Empty shards refers to a where a significant number of shards within an Elasticsearch cluster do not contain any data. This can lead to...

Elasticsearch Mapping API: A Comprehensive Guide

In this article, we will delve into the Mapping API, its usage, and best practices for managing mappings in Elasticsearch.

Elasticsearch Master Node

This article will discuss some advanced techniques and best practices for optimizing Elasticsearch master nodes to ensure cluster stability.

Elasticsearch Match All Query

Learn how to use Elasticsearch's Match All Query to retrieve all documents within an index and how to optimize it for better performance.

Elasticsearch Match Phrase Query

Master precise text searches with Match Phrase Query. Learn the key differences from Match Query and how to boost relevance in results.

Elasticsearch Match Query Example

Learn how to use Elasticsearch Match Query with a comprehensive guide that includes examples, best practices for precise and fuzzy searches.

Elasticsearch match_only_text Field Type (For Storage Optimization)

The new match_only_text feature in Elasticsearch can save up to 10% of disk space on logging datasets. This field type will set a flat...

Elasticsearch Match, Multi-Match, and Match Phrase Queries

Match, Multi-Match & Match Phrase are all types of Elasticsearch queries, used to search for matching documents in an index. To use them...

Elasticsearch Memlock: Best Practices and Configuration

This article will discuss the significance of memlock, best practices, and how to configure it for optimal performance.

Elasticsearch Memory and Disk Usage Management

One way to evaluate whether your resources are cost efficient it check the ratio of disk usage to the memory allocated...

Elasticsearch Memory: Reducing Memory Allocated to Hot Nodes

Follow the steps listed in this guide to reduce the memory allocated to hot nodes in your Elasticsearch cluster.

Elasticsearch Minimum Requirements

Here's a detailed guideline on the minimum requirements for Elasticsearch, including hardware specifications, JVM settings...

Elasticsearch Minimum_should_match

The `minimum_should_match` parameter in Elasticsearch plays a crucial role in fine-tuning the relevance of search results. An Example...

Elasticsearch Monitoring with Grafana and Prometheus

Here's how to set up Elasticsearch monitoring using Prometheus and Grafana. To monitor Elasticsearch with Prometheus you first need to...

Elasticsearch More_Like_This

This guide provides actionable examples for optimizing and fine-tuning the More_Like_This query for enhanced search results.

Elasticsearch Moving Function

Learn the advanced usage of moving functions in Elasticsearch, including how to implement models and metrics and some common use cases.

Elasticsearch Msearch

_Msearch in Elasticsearch allows you to send multiple search requests within a single HTTP request. The Multi-Search API...

Elasticsearch Multi Index Query

Multi-index queries in Elasticsearch allow users to search for documents across several indices simultaneously. To query multiple indices...

Elasticsearch Multi Index Search

This article will discuss best practices and advanced techniques for performing multi-index searches in Elasticsearch.

Elasticsearch Multi_Match

Learn how to use Elasticsearch multi-match from basic syntax to advanced queries for precise and versatile searches across multiple fields.

Elasticsearch Multi-Tier Architecture - How to Set Up a Hot/Warm/Cold/Frozen Elasticsearch Architecture

In Elasticsearch’s multi-tier architecture, the tiers are named hot, warm, cold & frozen. This Elasticsearch architecture allows better...

Elasticsearch Multiple Aggregations: A Comprehensive Guide

In this article, we will explore how to use multiple aggregations in Elasticsearch to gain deeper insights into your data.

Elasticsearch Multiple Index Query: Advanced Techniques and Best Practices

In this article, we will discuss advanced techniques and best practices for querying multiple indices in Elasticsearch, including examples.

Elasticsearch Multiple Indexes

This guide discusses best practices and performance optimization techniques when working with multiple indexes in Elasticsearch.

Elasticsearch Multiple Queries

In this guide, we'll discuss techniques for combining & optimizing multiple queries in Elasticsearch, including the use of compound...

Elasticsearch Natural Language Processing (NLP)

This guide explores Natural Language Processing (NLP) in Elasticsearch, deep learning on Elastic and its supported NLP operations/task types.

Elasticsearch Nest Terms Query

The nested terms query is a powerful tool for searching within nested objects in Elasticsearch. To implement this query...

Elasticsearch Nested Aggregation 

Elasticsearch nested aggregation is a powerful technique for analyzing complex data structures that contain nested documents. To use...

Elasticsearch Nested Filter

Learn how to define nested fields, index & query nested documents with the Elasticsearch Nested Filter. Before it, you need to define...

Elasticsearch Nested Query

An Elasticsearch nested query is used to search for documents containing specific criteria within these nested objects. To implement...

Elasticsearch Network Host Configuration: Best Practices and Optimization

In this article, we will discuss the importance of the network.host setting, best practices for configuring...

Elasticsearch Not Indexed Field

This guide focuses on how to handle not indexed fields in Elasticsearch, including use cases, how to configure them, and examples.

Elasticsearch Not Null Query

Here's how to create not null queries in Elasticsearch, which will help you find documents with existing or missing fields.

Elasticsearch Null Value

Learn how to filter and find null values in Elasticsearch when searching for documents where the field is null

Elasticsearch Number of Allowed Shards Per Node is Too High

In order to understand the context of this event, we first need to explain the different settings at play that govern the allowed...

Elasticsearch Pagination - Which Technique to Use Depending on Your Use Case

Elasticsearch currently provides 3 different techniques for fetching many results: Pagination, Search-After and Scroll. To learn how to...

Elasticsearch Painless Script Examples

In this article, we will explore some practical examples of using Painless scripts in Elasticsearch such as Scripted Fields in Kibana...

Elasticsearch Partial Snapshots - Customer Post Mortem

An Elasticsearch PARTIAL snapshot error indicates that one or more index shard snapshots could not be taken. The snapshot status...

Elasticsearch Percolate Query

The Elasticsearch percolate query is a unique and valuable feature that allows users to perform reverse searches. To implement it...

Elasticsearch Performance Metrics: Key Indicators and Monitoring Techniques

In this article, we will discuss the essential Elasticsearch performance metrics and monitoring techniques to ensure optimal...

Elasticsearch Post Filter

Learn Elasticsearch's Post Filter key use cases, how to implement it to enhance search results., and important performance considerations.

Elasticsearch Prefix Query

Learn how to utilize Elasticsearch prefix query for searches. This guide covers the syntax, usage examples, and options to refine your query.

Elasticsearch Put Document: Best Practices and Advanced Techniques

This article will discuss advanced techniques and best practices for using the Elasticsearch Put Document API to index documents...

Elasticsearch Python Example

In this guide, we'll walk through an example of using the Elasticsearch Python client, Elasticsearch-py, to index & search documents.

Elasticsearch Query Bool

Learn how to use Elasticsearch's bool query feature to combine different types of query clauses for more accurate and relevant search results

Elasticsearch Query Builder

Elasticsearch Query Builder simplifies the construction of complex queries. See step-by-step examples for match, bool, & aggregation queries.

Elasticsearch Query DSL Examples

This guide explores best practices for constructing Elasticsearch queries, focusing on the Query DSL (Domain Specific Language). To create...

Elasticsearch Query Field Contains Text

This guide explains how to construct and optimize queries for searching text in specific fields using Elasticsearch. To use

Elasticsearch Query Match All

The Elasticsearch match_all query allows users to retrieve all documents within an index or multiple indices. To use Match_all...

Elasticsearch Query Multiple Indices: Best Practices and Performance Optimization

In this article, we will discuss best practices and performance optimization techniques for querying multiple indices in Elasticsearch.

Elasticsearch Query Nested

Learn how to use Nested Queries in Elasticsearch for querying complex, nested JSON documents and the essentials of terms & bool queries.

Elasticsearch Query Partial Match

Here are various techniques to achieve partial matching in Elasticsearch. First, use wildcards as they are...

Elasticsearch Query Syntax: Advanced Techniques and Best Practices

In this article, we will explore advanced techniques and best practices for constructing Elasticsearch queries.

Elasticsearch Query Terms

This article will discuss advanced techniques to improve query performance and accuracy. First, Use the "bool" query for..

Elasticsearch Query: Optimizing Query Performance

In this guide, we will discuss techniques to optimize Elasticsearch query performance, including using filters, query rewriting & caching.

Elasticsearch Range Query: Advanced Usage and Optimization Techniques

In this guide, we'll show advanced usage & optimization techniques for range queries including how to use multiple ranges, optimize...

Elasticsearch Regex Query: Advanced Usage and Optimization

In this article, we will discuss the usage of regex queries in Elasticsearch, their performance implications...

Elasticsearch Releases

In this article, we will discuss Elasticsearch releases. including versioning system, compatibility considerations, and upgrade strategies.

Elasticsearch Rename Index

In this guide it will guide you through the process of renaming an index in Elasticsearch through a how-to process.

Elasticsearch Return Count: Efficiently Counting Documents in Elasticsearch

In this article, we will explore different methods to efficiently count documents in Elasticsearch, including using the Count API...

Elasticsearch Role Mapping and User Management

Role & user mapping is the process that links users from an external system to roles in Elasticsearch. The role mapping API can be...

Elasticsearch Rolling Restart: How to Perform Rolling Restarts

By executing Elasticsearch rolling restarts with the help of the API, you can maintain high cluster availability & avoid downtime. To do..

Elasticsearch Rollup: How to Rollup Data in Elasticsearch

Rollup jobs in Elasticsearch reduce old data storage costs by storing summaries of data for a given time period. Rollup examples include...

Elasticsearch Runtime Fields - How to Use Runtime Fields in Elasticsearch

An Elasticsearch runtime field is a field evaluated at query time instead of indexing time, which allows to modify our schema at the...

Elasticsearch Runtime Fields: How to Use Lookup Runtime Fields

Elasticsearch runtime fields with a type of lookup can retrieve field values from the associated indices using the fields parameter on...

Elasticsearch Script

This guide will focus on advanced usage and best practices for Elasticsearch scripting, providing examples & instructions for use cases.

Elasticsearch search by two fields

In this guide, we'll explore techniques to perform searches by two fields, including multi-match queries, bool queries & query-time field...

Elasticsearch Search Multiple Indexes

In this article, we will discuss the best practices and optimization techniques when performing multi-index searches in Elasticsearch.

Elasticsearch Search Suggestion - Term Suggester, Phrase Suggester, Completion Suggester (Autocomplete)

Elasticsearch offers three types of suggesters: term suggesters, phrase suggesters & completion suggesters (autocomplete). Suggesters work...

Elasticsearch Search Template

This article will discuss the benefits of search templates and provide a step-by-step guide on how to create and use them.

Elasticsearch Search Template

Learn how to create, register and effectively use Elasticsearch's search templates to format your queries and also with multi search API

Elasticsearch Search Unique Values: Aggregations and Cardinality

In this article, we will explore how to use Elasticsearch aggregations and the cardinality metric to search...

Elasticsearch Searchable Snapshots

Elasticsearch searchable snapshots allow data exploration. They can be controlled with ILM Policies or be manually mounted. To implement...

Elasticsearch Sentiment Analysis

Elasticsearch Sentiment Analysis determines the emotional tone of a text. Sentiment analysis has 2 categories: Binary and Multiclass...

Elasticsearch Shard Allocation Status

This guide goes over the Elasticsearch shard allocation statuses and explains how to troubleshoot potential issues.

Elasticsearch Shingles Example

Shingles, also known as word N-grams, are a useful technique for improving the relevance of search results in Elasticsearch. Examples...

Elasticsearch SLM - Elasticsearch Snapshot Lifecycle Management

Elasticsearch's Snapshot Lifecycle Management (SLM) automates the generation & retention of snapshots. Here's how to use and configure it.

Elasticsearch Sort by Boolean: Advanced Techniques and Best Practices

In this article, we will discuss advanced techniques and best practices for sorting documents by boolean fields in Elasticsearch.

Elasticsearch Sort: Advanced Techniques and Best Practices

Sorting is an essential aspect of Elasticsearch. In this article, we will explore advanced techniques and best practices for sorting.

Elasticsearch Span_Near Query

Learn how to use Elasticsearch's span_near query. Learn its structure, practical use-cases, and tips for optimization.

Elasticsearch Split Index API

By using the Elasticsearch Split Index API, an existing index can be split to create a new index with extra primary shards. To do this...

Elasticsearch Stop Words

This guide will explore the use of stop words in Elasticsearch, providing examples and step-by-step instructions.

Elasticsearch Stored Fields

Learn how stored fields differ from _source field, how to configure them for specific use-cases, their advantages and limitations.

Elasticsearch String Contains Substring: Advanced Query Techniques

In this article, we will explore advanced techniques for querying Elasticsearch to find documents where a field contains...

Elasticsearch Sum Aggregation

The Elasticsearch sum aggregation allows you to calculate the sum of a numeric field for a set of documents. To implement...

Elasticsearch Synonym Regulations: Best Practices and Implementation

In this article, we will discuss the importance of synonyms, how to configure and use them, and the best practices to...

Elasticsearch Synonym Token Filter

A tokenizer decides how Elasticsearch will take a set of words and divide it into separated terms called “tokens”. To work with synonyms...

Elasticsearch Synthetic _source 

The synthetic _source mode in Elasticsearch is used to configure an index so that it saves storage space & doesn't duplicate data. To setup...

Elasticsearch system requirements

This article discusses the hardware and configuration requirements for Elasticsearch, focusing on aspects such as CPU...

Elasticsearch Task Management API

The Elasticsearch task management API helps you manage long-running tasks. To create, monitor, cancel & retrieve the results of tasks...

Elasticsearch Term Filter

Learn how to filter documents based on exact matches in a specific field with Elasticsearch's term filter. Learn its usage & best practices.

Elasticsearch Term Vectors

Learn how to enable and retrieve Term Vectors, and explore use-cases in information retrieval, text classification, and more.

Elasticsearch Terms Stats

Learn how to use Elasticsearch Terms Stats feature to index your data, generate term-based statistics, and analyze data with detailed guide.

Elasticsearch Text Analyzers - Tokenizers, Standard Analyzers, Stopwords and More

The text analysis process is tasked with two functions: tokenization and normalization and is carried out by employing analyzers. When you...

Elasticsearch Time Series Data Stream (TSDS) 

Elasticsearch Time Series Data Stream (TSDS), is an optimized way to store time-based metrics. To Implement Time Series Data Streams...

Elasticsearch Token Synonyms

This article demonstrates practices for implementing token synonyms in Elasticsearch with a step-by-step guide on how...

Elasticsearch Too Many Pending Tasks Issue

Elasticsearch clusters may struggle to process the tasks in its queue. This can lead to delays in executing tasks...

Elasticsearch Too Much Memory Allocated to Content Nodes

The memory allocated to the content nodes in your Elasticsearch cluster can be reduced. This excess memory allocation...

Elasticsearch Too Much Memory Allocated to Frozen Nodes

If the current memory allocation for the frozen nodes in your Elasticsearch cluster is higher than necessary, the memory-to-disk...

Elasticsearch Too Much Memory Allocated to Warm Nodes

The memory allocated to the warm nodes in your Elasticsearch cluster can be reduced. Warm nodes are used to store...

Elasticsearch Transform APIs

The Elasticsearch Transform APIs can be used to turn existing indices into summarized indices. To create a transform API...

Elasticsearch Truncate Field

In this article, we will discuss various techniques and best practices for truncating fields in Elasticsearch. First...

Elasticsearch Types: Understanding and Migrating Elasticsearch Types

Here's how to migrate from multiple types to single types in Elasticsearch and the reasons for the deprecation of Elasticsearch Types.

Elasticsearch Unlimited Shards per Node Issue

This guide discusses the issue of having an unlimited number of shards per node in Elasticsearch. The cluster.max_shards_per_node setting...

Elasticsearch Update Document Field

Learn how to maintain the accuracy and relevance of the data stored in Elasticsearch indices by updating document fields.

Elasticsearch Upsert

Upsert in Elasticsearch allows you to perform both update and insert actions in a single request. To perform an upsert operation...

Elasticsearch Version History: Key Changes and Improvements

This article will discuss the key changes and improvements in Elasticsearch's version history, focusing on major releases and their impact...

Elasticsearch Version is Outdated

Though it is entirely possible to run on older versions of Elasticsearch, it is recommended to run on the newer...

Elasticsearch Version Upgrades - Using Feature Migration APIs to Avoid Deprecation Issues

When upgrading to a new Elasticsearch version, you can use the feature migration APIs to avoid deprecation issues. These APIs simplify...

Elasticsearch Wildcard Queries

Wildcard queries in Elasticsearch allow users to search for documents containing specific patterns in their text fields

Elasticsearch Wildcard Search on Multiple Fields

In this article, we will discuss how to perform wildcard searches on multiple fields in Elasticsearch. Wildcard queries enable users...

Elasticsearch_disk_usage API

The Elasticsearch _disk_usage API helps get information about disk usage for each analyzed field of indices and/or data streams. To use it...

Elasticsearch.yml

Mastering Elasticsearch.yml configuration is essential for optimizing your Elasticsearch cluster's performance and security. To configure...

Enable Adaptive Replica Selection

Adaptive replica selection is a process that prevents a distressed Elasticsearch node from delaying the response to queries. To enable it...

Enable Shard Rebalancing and Allocation

Cluster shard rebalancing and allocation are often confused with each other. If cluster shard rebalancing isn't enabled, then...

Ensuring High Availability in Elasticsearch: Strategies and Best Practices

This article delves into the strategies and best practices to ensure high availability in Elasticsearch. The first strategy is to...

Excessive Replicas on Elasticsearch Data Nodes

Having an excess of replicas on certain indices within the Elasticsearch data nodes can lead to undesirable consequences. To fix the issue...

Excluding Elasticsearch Fields from Indexing

This article will discuss the reasons for excluding fields from indexing, how to configure Elasticsearch to exclude specific fields...

Field Missing in Elasticsearch

Here, will show how to handle Elasticsearch missing fields queries, including using the `exists` query, the `missing` query...

Fielddata

In Elasticsearch the term Fielddata is relevant when performing sorting and aggregations on text field. To set fielddata=true, you...

File Descriptors

File descriptors are required to keep track of all the files Elasticsearch has open at any given time, as well as all network...

Filters

Elasticsearch Filters apply conditions inside the query to narrow down the matching results. A filter clause can be used used in...

Flood Stage Disk Watermark

When the “disk flood stage” threshold is exceeded on an Elasticsearch cluster, it will start to block core actions. To resolve this issue...

Flush, Translog and Refresh

In Elasticsearch, flush is the process of permanently storing data onto the disk for all of the operations that have been stored in memory.

Fsync Failed

In this article, we will discuss the common causes of fsync failed errors and provide solutions to resolve them.

Grafana Elasticsearch

In this guide, we will guide you through the process of integrating Grafana with Elasticsearch. Step 1: Add Elasticsearch as a data source....

Grafana OpenSearch Dashboard: How to Integrate and Visualize Data

In this article, we will discuss how to integrate Grafana with OpenSearch and create a dashboard to visualize your data.

Guide to Resolving Disk Underutilization on Hot Tier in Elasticsearch

If there is more disk space allocated to hot nodes in the Elasticsearch cluster than needed, this means that the cluster is not utilizing...

Handling Arrays in Elasticsearch: Best Practices and Advanced Techniques

In this article, we will discuss advanced techniques and best practices for working with arrays in Elasticsearch. Mapping an array can...

Handling Expired Tokens in Elasticsearch

In this article, we will discuss how to handle expired tokens in Elasticsearch, including detecting token expiration, refreshing tokens &...

Handling Too Many Requests in Elasticsearch

This article will discuss the reasons behind too many requests in Elasticsearch, how to identify the problem and resolve it.

Harnessing the Power of JSON in Elasticsearch

This article will delve into the advanced usage of JSON in Elasticsearch, focusing on its role in document structure, search queries...

Heap Size Usage and JVM Garbage Collection

A high heap size in Elasticsearch will give your node more memory for indexing and search operations. However, your node also requires...

Heavy Merges Were Detected

Heavy merges use CPU, memory and disk resources, which can slow down the cluster’s response speed. In order to fix...

High Cluster Pending Tasks

Elasticsearch cluster pending tasks are updates to the cluster state that were initiated by a user or the cluster. To resolve, list the...

High CPU

High CPU is often a symptom of other underlying issues. It should be fixed because a distressed node will slow query response time and...

High Disk Watermark

High disk watermark is one of the various thresholds on your Elasticsearch cluster. Passing this threshold is a warning and you should not...

High Management Queue

A high number of tasks in management queue can cause Elasticsearch cluster instability which could result in data loss. To resolve...

How Does Elasticsearch Handle Uppercase vs. Lowercase Letters in the Aggs Order?

Elasticsearch sorts uppercase & lowercase letters separately, impacting results. Normalizers can be used to provide...

How to Activate and Use Elasticsearch Slow Logs

By analyzing your slow logs, you can understand why searches are slow and how to optimize them. To enable slow logging in Elasticsearch...

How to Aggregate Multiple Events in Logstash

This guide will show you how to leverage Logstash to aggregate multiple events that share some common data.

How to Build Your Own Elasticsearch Aggregation Using scripted_metric

The Elasticsearch scripted_metric aggregation enables users to write their own bespoke aggregation logic. Here's how to use it.

How to Build Your Own Mastering the Elasticsearch Multi-Get (MGET) Operation Aggregation Using scripted_metric

This guide delves into the intricacies of the Elasticsearch MGET operation, its syntax, how to optimize its usage & provides examples.

How to Change Nodes Heap Memory Allocation and Limits in Elasticsearch

This guide covers how to change node heap limits and memory allocation in Elasticsearch. Elasticsearch's heap memory allocation...

How to Choose the Correct Number of Shards per Index in Elasticsearch

Finding the right number of shards for your Elasticsearch indices, and the right size for each shard depends on many factors, including...

How to configure all Elasticsearch node roles (master, data, coordinating..)

Follow these steps to configure all Elasticsearch node role types (master, data, coordinating, ingest, machine learning, remote eligible...

How to Convert a Watch to an ElastAlert

This guide will focus on how to convert a Watch (Watcher Alerting) to an ElastAlert, including code examples and tips.

How to Define Efficient Mapping in Elasticsearch

Mappings are the core element of index creation in Elasticsearch. Defining them correctly can improve performance. Mapping types include...

How to Enable Monitoring Alerts on Elastic Cloud

This guide will show you how to enable resource usage alerts in Elastic Cloud & receive emails when errors and exceptions occur.

How to Ensure Slow Logs Don’t Get Cut Off (Applicable before ES 8.0)

Analyzing search slow logs can provide users with advanced insights like the number of costly queries, reasons why queries were costly, so...

How to Handle Recurring RED Status Events- Customer Post Mortem  

When facing recurring red status events in Elasticsearch, like "high cluster pending tasks", you need to investigate the cause & resolve...

How to Implement Autocomplete in Elasticsearch

In this article, we will discuss how to implement autocomplete using the completion suggester in Elasticsearch.

How to Improve your Elasticsearch Aggregation Performance

There are multiple ways to improve your Elasticsearch aggregation performance. First, you should limit the scope by filtering documents...

How to Increase Elasticsearch Search Speed

By optimizing and maintaining Elasticsearch search speed, you can improve your product’s user experience. Here's how to speed up search...

How to Increase Primary Shard Count in Elasticsearch

There are 2 methods to increase the primary shard count in Elasticsearch: _reindex API & the _split API. Before using either method, you…

How to Ingest Data into Elasticsearch: A Comprehensive Guide

This article will provide a detailed guide on various methods to ingest data into Elasticsearch, including Logstash, Beats...

How to leverage ingest pipelines to transform data transparently in Elasticsearch

Ingest pipelines sit within the Elasticsearch node and will perform a set of alterations on your data that you...

How to Leverage the New ES|QL Query Language

This guide explores the new ES|QL query language, its capabilities, limitations and provides examples. The new ES|QL query language...

How to Migrate Data between Different Versions of Elasticsearch & Between Clusters

To move data between Elasticsearch versions & clusters, you can: reindex from a remote cluster, use snapshots or Logstash. Migrating...

How to Model Relationships Between Documents in Elasticsearch Using Join

The join data type field allows users to establish parent-child relationships between documents in Elasticsearch. To use it, you need to...

How to Model Relationships Between Documents in Elasticsearch Using Nesting

Elasticsearch has many methods for defining relationships between documents, such as nested documents. To use the nested field type...

How to Model Relationships Between Documents in Elasticsearch Using Object

Object types in Elasticsearch can be used to define relationships between documents. Here's how to use the object field type for that purpose.

How to Optimize Elasticsearch Disk Space and Usage

If you don’t have enough disk space available, Elasticsearch will stop allocating shards to the node. This will eventually prevent you from...

How to Optimize Match All Queries in Elasticsearch

In this article, we will discuss how to optimize match_all queries in Elasticsearch to ensure efficient and reliable results.

How to Optimize Nested Aggregations in Elasticsearch

In this article, we will discuss how to optimize nested aggregations in Elasticsearch for better performance and scalability.

How to Provide a Simple Query Interface Using Search Templates in Elasticsearch

Here's how to provide a simple query interface in Elasticsearch by using search templates. The benefits & usage of search templates can...

How to Recover Elasticsearch Dangling Indices

Follow these steps to list and restore dangling indices in Elasticsearch: (1) Run the dangling indices API & copy the...

How to Reduce the Number of Shards in an Elasticsearch Cluster

When you have too many shards in your Elasticsearch cluster, there are a few steps you can take in order to reduce the number of shards...

How to Secure an Elasticsearch Cluster: TLS, SSL & CERTUTIL Certificates

Securing an Elasticsearch cluster and creating TLS certificates will require some downtime on your cluster. Here's how to create...

How to Set Up Vector Search in Elasticsearch

This guide will delve into the main ways to perform vector search in Elasticsearch, how to run a k-NN search, configure the knn search...

How to Update Security Certificates in Elasticsearch

This guide explains the various ways in which you can update your Elasticsearch security certificates. The method that you select depends...

How to Upgrade Elasticsearch from Version 6 to Version 7

It's tricky to upgrade Elasticsearch without losing data & facing issues. Here's how to easily upgrade Elasticsearch 6 to 7.

How to Upgrade Elasticsearch from Version 7 to Version 8

Follow the steps listed in this guide to easily upgrade Elasticsearch from version 7 to version 8. First, prepare to upgrade your nodes by...

How to Upgrade Elasticsearch Versions

The 2 approaches for upgrading Elasticsearch versions are full cluster restarts & rolling restarts. Before making an Elasticsearch upgrade...

How to Upgrade from Version 5 to Version 6 in Elasticsearch

Follow the steps listed in this guide to easily upgrade your Elasticsearch from version 5 to version 6. First, check the...

Implementing Elasticsearch API Authentication for Enhanced Security

There are 3 Elasticsearch API authentication methods: basic, token-based and API key-based authentication. To implement...

Implementing Elasticsearch Encryption at Rest

This article will delve into the details of implementing Elasticsearch encryption at rest, including the necessary configurations...

Implementing Robust Authentication in Elasticsearch

This article will delve into the advanced aspects of Elasticsearch authentication, focusing on how to implement robust security measures.

Implementing Search-as-You-Type in Elasticsearch

In this article, we will discuss how to implement search-as-you-type in Elasticsearch using edge n-grams and the completion suggester.

Implementing Typeahead Functionality in Elasticsearch

There are 3 approaches to implement typeahead in Elasticsearch: edge n-gram, search_as_you_type and completion suggester. To use...

Index - How to create, list, query and delete indices

How to create an Elasticsearch Index & what it is with a general overview - an index (plural: indices) contains a schema and can have

Index Lifecycle Management & Policy

Index lifecycle management helps automate the creation, management & removal of an Elasticsearch index. Define the index lifecycle policy...

Index Queue Size Is High

Once an indexing queue exceeds the maximum size, the Elasticsearch node will start rejecting index requests. To resolve this, check the...

Index Templating in Elasticsearch - How to Use Composable Templates

Elasticsearch index templates allow us to create indices with user defined configuration. An index can pull the configuration from these...

Indexing

Indexing is the process of adding or updating new documents to an Elasticsearch index. In its simplest form, you can index a document by...

Indexing Failed in Elasticsearch

The causes for indexing failure in Elasticsearch can be broken into 2 areas: index-related & node-related failures. To resolve...

Integrating Apache Spark with Elasticsearch: A Comprehensive Guide

This article will delve into the process of integrating Apache Spark with Elasticsearch, providing a step-by-step guide to help you...

Integrating Elasticsearch with Ruby on Rails for Advanced Search Functionality

This article will guide you through the process of integrating Elasticsearch with a Rails application. Ruby on Rails is a popular web...

Integrating Kafka with Elasticsearch for Real-Time Data Analysis

This article will delve into the details of how to integrate Kafka with Elasticsearch and the benefits of this integration.

Joining Two Indexes in Elasticsearch: A Comprehensive Guide

This article will delve into the process of joining two indexes in Elasticsearch, focusing on the use of the `terms` query and the...

Lack of Quorum

This error occurs when the Elasticsearch cluster doesn't have a quorum of nodes with voting rights to elect a new master node. To resolve...

Leveraging Elasticsearch Script Fields: A Comprehensive Guide with Examples

This article will delve into the practical applications of script fields in Elasticsearch, offering examples to illustrate their usage.

Leveraging Node.js for Elasticsearch: An Advanced Guide

This guide explores Node.js usage with Elasticsearch, emphasizing the Node.js Elasticsearch client intricacies, and how to optimize its use.

Loaded Client Nodes

A saturated coordinating node could cause an increase in search or indexing response latency. This can be fixed by putting a load balancer...

Loaded Data Nodes

Sometimes you can observe that the CPU and load on some of your data nodes is higher than on others. This can occasionally be caused by...

Loaded Master Nodes

An overloaded master node may cause instability in the cluster. There are 3 ways to fix loaded master nodes: (1) Checking for...

Low Disk Watermark

Low disk watermark is one of the various thresholds on your Elasticsearch cluster. Here are possible actions you can take to resolve...

Lucene

Elasticsearch Lucene or Apache Lucene is an open-source Java library used as a search engine. Elasticsearch is built on top of Lucene...

Mapping

Mapping contains the properties of each field in the index. A common issue in Elasticsearch is an incorrectly defined mapping. Examples of...

Master Node Not Discovered

An Elasticsearch cluster requires a master node to be identified in the cluster. Reasons why a master node is not discovered yet include...

Mastering Date Math in Elasticsearch

This article delves into the intricacies of Date Math in Elasticsearch, providing a comprehensive understanding of its usage and benefits.

Mastering Dynamic Templates in Elasticsearch

Dynamic templates in Elasticsearch allows you to define custom mappings that can be applied to dynamically added fields. To create...

Mastering Elasticsearch Audit Logging for Enhanced Security and Compliance

Audit logging allows you to maintain the security and compliance of Elasticsearch clusters. To enable, configure & analyze audit logs...

Mastering Elasticsearch Configuration for Optimal Performance

This article will delve into the intricacies of Elasticsearch configuration, providing you with the knowledge to fine-tune your...

Mastering Elasticsearch Custom Analyzers for Enhanced Search Capabilities

An Elasticsearch custom analyzer is defined by combining a single tokenizer with 0 or more token filters and character filters. To create...

Mastering Elasticsearch Force Merge Operations

This guide explains when & how to use force merge in Elasticsearch, provides examples, and covers best practices for force merge operations.

Mastering Elasticsearch Histogram Aggregations

This guide delves into the intricacies of Histogram Aggregations in Elastticsearch, their use cases & optimization and also presents examples.

Mastering Elasticsearch Inline Scripts for Advanced Search Operations

Elasticsearch inline scripts can be used to perform complex search operations, manipulate document fields and compute new fields. To use...

Mastering Elasticsearch Normalizers for Improved Text Analysis

Elasticsearch normalizers are a crucial component in the text analysis process. Here is how they work, the best practices for usage...

Mastering Elasticsearch Remote Clusters

Elasticsearch remote clusters offer a powerful way to connect multiple clusters and perform cross-cluster operations. To configure a remote...

Mastering Elasticsearch Sort Functionality for Optimized Query Performance

This article delves into the intricacies of Elasticsearch sort, offering insights on how to leverage this feature for optimized query...

Mastering Fixed_Interval Aggregations in Elasticsearch

In this article, we will dive deep into the concept of fixed interval aggregations, their use cases and implementation, including examples.

Mastering Fragment_Size in Elasticsearch for Optimized Search Results

This article delves into the intricacies of 'fragment_size' and how to effectively use it to optimize search results.

Mastering GeoPoint Data Types in Elasticsearch

This guide delves into the intricacies of the Elasticsearch geo_point data type, its use cases & implementation and covers geospatial queries.

Mastering Group By Queries in Elasticsearch

This article will delve into the intricacies of using the "group by" functionality in Elasticsearch, providing examples and step-by-step...

Mastering Index Prefixes in Elasticsearch

Index prefixes in Elasticsearch are primarily used to speed up text search operations. They are part of the inverted index and...

Mastering Painless Scripting Language in Elasticsearch

Painless is a powerful and flexible scripting language that can be used to implement complex logic in Elasticsearch. To use it...

Mastering the Art of Elasticsearch Cluster Setup

Setting up an Elasticsearch cluster involves several critical steps and configurations. Follow the steps in this guide to setup your cluster.

Mastering the Elasticsearch Cat API for Efficient Cluster Management

This article delves into the intricacies of Elasticsearch Cat API, how to use it, customize it, and troubleshoot with it, including examples.

Mastering the Update by Query Functionality in Elasticsearch

Elasticsearch's Update by Query API is tool that allows you to modify documents that match a specific query. To use it...

Mastering the Use of Elasticsearch AND and OR Operators

The AND and OR operators in Elasticsearch allow for the creation of complex search conditions. To implement the AND and OR operators...

Mastering Timestamps in Elasticsearch

This article delves into the advanced aspects of handling timestamps in Elasticsearch, including indexing, querying, and formatting.

Max Shards Per Node Exceeded

If the max of shards per node is exceeded in Elasticsearch, shards can't be allocated. It is crucial to check if the limit is set at a...

Max_Num_Segments in Elasticsearch

In this article, we will discuss the importance of max_num_segments, how to configure it, and best practices...

Memory Allocation Issues in Cold Nodes

Cold nodes are used to store less frequently accessed data, and optimizing their memory allocation can lead to improved...

Memory Usage Guide

The Elasticsearch process is very memory intensive. Here are the memory requirements and some tips to reduce your Elasticsearch memory usage.

Metadata

Elasticsearch metadata refers to additional information stored for each document using metadata fields. Metadata fields can be customized...

Misuse of Wildcards

It's possible to reduce the risk of accidental deletion of indices by preventing the use of wildcard for destructive operations. To check...

Monitoring Elasticsearch with Prometheus

Here's how to set up Prometheus to monitor Elasticsearch & visualize the collected metrics using Grafana. The prometheus exporter....

Monitoring Metrics in Elasticsearch

In this guide, we'll discuss the key Elasticsearch monitoring metrics that you should keep an eye on to ensure smooth operations.

Named Queries

Named queries allow you to label your queries with a name. Named queries can be utilized in a variety of use cases such as...

Node Concurrent Recoveries Setting is Too High / Low

The node concurrent recoveries setting determines the max number of shards that can be recovered at once from each node. It's important to...

Node Disconnected

An Elasticsearch node can disconnect from a cluster for several reasons, including: excessive garbage collection from JVM, configuration...

Nodes

There are different types of nodes in Elasticsearch. Each has its own role and purpose. Master, coordinating and data nodes differ...

Number of Master Nodes

Master nodes are responsible for actions such as creating or deleting indices. If you don't have enough master nodes, it could lead to...

Object Fields VS. Nested Field Types in Elasticsearch

Nested is a special object type that is indexed as a separate document. To demonstrate the use of Elasticsearch nested VS. object fields...

Optimizing Elasticsearch Bulk Indexing for High Performance

In this article, we will focus on demonstrating how to optimize the bulk indexing process for high performance.

Optimizing Elasticsearch Cluster with the Reroute API

This guide discusses the options available with the Reroute API & provides examples of how to use them effectively. The _cluster/reroute...

Optimizing Elasticsearch Dockerfile for Production Environments

This article will delve into the advanced aspects of creating an optimized Elasticsearch Dockerfile for production environments.

Optimizing Elasticsearch Document Field Updates

In this article, we will discuss various techniques and best practices for updating document fields in Elasticsearch, including...

Optimizing Elasticsearch Logging for Better Troubleshooting and Performance

This article will discuss the best practices for Elasticsearch logging, including log levels, log formats, and log rotation strategies.

Optimizing Elasticsearch Performance by Removing Fields

In this article, we will discuss the reasons for removing fields, the methods to remove fields, and the potential...

Optimizing Elasticsearch Sort by Text Field

In this article, we will discuss how to optimize Elasticsearch when sorting by text fields, which can be a challenging task...

Optimizing Elasticsearch Storage: Best Practices and Advanced Techniques

In this article, we will discuss advanced techniques and best practices for optimizing Elasticsearch storage.

Optimizing Query Performance in Elasticsearch

In this article, we will discuss various techniques and best practices to optimize query performance in Elasticsearch.

Optimizing Query String Searches in Elasticsearch

This article will discuss how to optimize query string searches in Elasticsearch to improve performance and relevance.

Optimizing Schema Design in Elasticsearch: Techniques & Best Practices

In this article, we will discuss some advanced techniques and best practices for optimizing schema design in Elasticsearch.

Oversharding

A large number of shards on an Elasticsearch cluster requires extra resources. Learn key ways to avoid and correct oversharding...

Parsing JSON Fields in Elasticsearch

In this article, we will discuss how to parse JSON fields in Elasticsearch, which is a common requirement when dealing...

Persistent

In Elasticsearch, Persistent refers to cluster settings that persist across cluster restarts. This setting is used in Cluster Update API...

Plugins

Plugins in Elasticsearch are used to extend the functionality of Elasticsearch. An Elasticsearch plugin is installed and removed using the...

Queue

Queues in Elasticsearch exist in the context of Thread Pools. Queues are used to hold the pending requests for thread pools instead of...

Rebalance

Cluster rebalancing is the process by which an Elasticsearch cluster distributes data across the nodes. To force rebalance manually...

Recovery

In Elasticsearch, recovery refers to the process of recovering an index or shard when something goes wrong. You can recover data by using...

Red Status

Elasticsearch red status indicates not only that the primary shard has been lost, but also that a replica has not been promoted...

Refresh Interval

Elasticsearch requires a refresh operation to make indexed information available for search. You can set the refresh interval by...

Register Snapshot Repository

To create & restore snapshots, you need to register a snapshot repository with every Elasticsearch node in the cluster. Here are the steps...

Reindex

Reindex in Elasticsearch refers to copying existing data from a source index to a destination index. In some scenarios, the reindex API is...

Rejected Search Requests in Elasticsearch - Causes and Solutions

There are a number of reasons why a search request can be rejected by the Elasticsearch cluster. To resolve the issue, you need to...

Removing a Node from an Elasticsearch Cluster

Follow these steps to safely remove a node from an Elasticsearch cluster without causing any data loss or impacting the cluster's performance.

Removing Hits from Elasticsearch Response

This article will discuss various methods to remove hits from Elasticsearch response, including using the _source filtering...

Replica

In Elasticsearch there are two types of shards: the primary shard & the replica copy. Each replica is located on a different node to ensure...

Replication

Elasticsearch replication refers to storing a redundant copy of the data. Elasticsearch creates 1 primary shard with a replication factor...

Repository

An Elasticsearch repository needs to be registered using the _snapshot endpoint. The supported repository types are: S3, HDFS, Azure...

Resetting Index in Elasticsearch: A Comprehensive Guide

In this article, we will discuss the process of resetting an index in Elasticsearch, including the steps to delete, create, and reindex data.

Resolving Conflicting Field Types in Elasticsearch

Conflicting field types in Elasticsearch can be a tricky issue to navigate. Here are the possible causes and resolutions for this issue.

Rest-high-level

Rest-high-level is built on top of low-level rest-client and is a method of communicating with Elasticsearch based on HTTP REST endpoints...

Restore

In Elasticsearch, restore refers to a snapshot restore mechanism. To restore a cluster from the snapshot, an index, or selected indices...

Retrieving the Last Document in Elasticsearch

In this article, we will discuss how to retrieve the last document in Elasticsearch. This can be useful in various scenarios...

Routing

In Elasticsearch, routing refers to document routing. When you index a document, Elasticsearch will determine which shard will be used...

Running Elasticsearch Locally: An Advanced Guide

This article will delve into the advanced aspects of running Elasticsearch locally, including setup, configuration, and optimization.

Scaling Elasticsearch - Drain Strategy for Scaling Down Resources

When scaling down Elasticsearch resources, it's important to consider several factors. Here's how to effectively plan to scale down.

Script Regex is Enabled in Painless Scripts

Script regex is disabled in Elasticsearch by default, but you can decide to enable it. Regex must be used with care in painless scripts...

Scroll

The Elasticsearch scroll API is useful when a search returns a large set of results. Large search results are exhaustive for the system...

Search

To search in Elasticsearch, send a GET request to the _search endpoint in the search API. In the query phase and the fetch phase there are...

Search is Slow in nodesNames

There are a number of possible causes for slow searches on particular nodes. To correct the issue and improve search performance, you...

Search Latency

This guide explores how to reduce Elasticsearch search latency based on a key study. The first lesson is to always...

Search Rejected Queue

An Elasticsearch cluster can start to reject search requests for several reasons. To resolve this, check the state of the thread pool and..

Securing Elasticsearch: A Comprehensive Guide to Setting Up Passwords

This article guides you through the process of setting up passwords in Elasticsearch, ensuring secure and authorized data access.

Setting Up Zone Awareness for Shard Allocation in Elasticsearch

Setting up zone awareness for shard allocation ensures high availability in the case of several servers going down. Here's how to...

Settings

Elasticsearch settings can be configured on the cluster-level, node-level and index-level. Here's how to set up and optimize your settings...

Shard Allocation is Unbalanced

Shard allocation is an algorithm by which Elasticsearch decides which unallocated shards should go on which nodes. To resolve unbalanced...

Shards

The number of shards is set when an index is created, and cannot be changed without reindexing. To handle unassigned Elasticsearch shards...

Shards Too Large - Shard Sizes

It is a best practice that Elasticsearch shard size should not go above 50GB for a single shard. If you go above this limit...

Sharing S3 Snapshots Between Two Elastic Cloud Accounts

Here's how to share snapshots between two deployments in one Elastic Cloud account & between two different Elastic Cloud accounts.

SLM in Elasticsearch vs Snapshot Management in OpenSearch

Here are the similarities and differences between Elasticsearch Snapshot Lifecycle Management (SLM) and OpenSearch Snapshot Management (SM).

Slow Indexing in Nodes

If the indexing queue is high/causes timeouts, it hints that Elasticsearch nodes can't keep up with the indexing rate. To fix slow indexing...

Slow Query Troubleshooting Guide

There are several potential reasons for a slow query in Elasticsearch. Slow logs can be used to detect & troubleshoot slow queries issues...

Snapshot

An Elasticsearch snapshot is a backup of an index taken from a running cluster. It's better to use snapshots instead of disk backups due...

Split Brain

Elasticsearch split brain occurs when there is more than one master in the cluster. By setting the quorum of minimum master nodes...

Task

A task is equivalent to an Elasticsearch operation, any request performed on an Elasticsearch cluster. The following commands are used...

Template

An Elasticsearch template falls into one of these categories: index templates or search templates. Examples of index templates include...

Terms Aggregation on High-Cardinality Fields in Elasticsearch

This guide explains how to get the best out of terms aggregation for high-cardinality fields in Elasticsearch. Understanding how it works...

Terms Enum API in Elasticsearch (For Low Latency Lookups)

In Elasticsearch, the Terms enum API looks for similarities in the index based on partial matches. To use the terms_enum API...

Threadpool

Elasticsearch threadpools are used to manage how requests are processed and to optimize the use of resources. The write threadpool...

Tracing Search Queries

Discover which queries are landing in your cluster by leveraging: proxies, the task management API, audit logs, slow logs & request tracing.

Troubleshooting 'No Alive Nodes Found in Your Cluster' Error in Elasticsearch

The "no alive nodes found in your cluster" error indicates that the Elasticsearch client is unable to connect to the cluster. To resolve...

Troubleshooting and Mitigating Elasticsearch Out of Memory Issues

This article delves into the causes, troubleshooting, and mitigation strategies for Elasticsearch Out of Memory (OOM) issues.

Troubleshooting Failed Elasticsearch Startup Issues

This article will delve into the common reasons for Elasticsearch startup failures and provide detailed solutions to address them.

Understanding and Configuring Elasticsearch Ports

This guide will delve into the details of Elasticsearch ports, their default settings, and how to configure them to suit your specific needs.

Understanding and Implementing Elasticsearch Get Mapping

In this article, we will delve into the details of Elasticsearch Get Mapping, its usage, and how to implement it effectively.

Understanding and Implementing Roles.yml in Elasticsearch

The roles.yml file defines roles & permissions in Elasticsearch. This guide explores roles.yml, its structure, implementation and examples.

Understanding and Managing Elasticsearch Machine Learning Jobs

This article will delve into the intricacies of Elasticsearch jobs, how to create and manage them, and how to interpret their results.

Understanding and Managing Elasticsearch Shards Limit

Elasticsearch imposes a soft limit on the total number of shards in a cluster. To effectively manage your Elasticsearch shards limit....

Understanding and Manipulating Elasticsearch Index Settings

This article will delve into the details of how to retrieve and manipulate index settings. Elasticsearch index settings are a crucial...

Understanding and Optimizing Elasticsearch -Xmx Setting

The Elasticsearch -Xmx setting is a critical configuration parameter that can significantly impact the performance and stability of your...

Understanding and Optimizing Elasticsearch node.processors

Here's how the Elasticsearch node.processors setting works and how to adjust it. When deciding on the optimal setting for node.processors...

Understanding and Optimizing vm.max_map_count for Elasticsearch Performance

In Elasticsearch, the vm.max_map_count parameter refers to the maximum number of memory map areas a process may have. The default value...

Understanding and Resolving the Issue: Elasticsearch Cannot Run as Root

This guide will delve into the reasons behind the Elasticsearch cannot run as root restriction and explain how to resolve it.

Understanding Elasticsearch Cat Indices

Elasticsearch cat indices is a command-line tool that provides a concise and human-readable overview of your cluster indices. To use...

Understanding Elasticsearch Data Types: A Deep Dive

This article will delve into the intricacies of Elasticsearch data types, providing a comprehensive understanding of their usage...

Understanding Elasticsearch Scoring and the Explain API

In this article, we will delve into the scoring mechanism of Elasticsearch and explore the Explain API, which helps...

Understanding Elasticsearch Slop and Its Usage

In this article, we will explore the concept of slop in Elasticsearch, its usage, and how to optimize its value for better search results.

Understanding Shards in Elasticsearch

In this guide, we will delve into the concept of shards, their types, and how they contribute to the overall performance of Elasticsearch.

Understanding the Process and Implications of Closing an Index in Elasticsearch

This article delves into the process of closing an index, its implications, and the scenarios where it might be beneficial.

Unleashing the Potential: Overview of Elasticsearch Use Cases

This article will delve into some of the advanced use cases of Elasticsearch, providing a comprehensive understanding of its capabilities.

Upgrade

An Elasticsearch upgrade of an existing cluster can be done in 2 ways: through a rolling upgrade or a full cluster restart. To upgrade...

Version

A version corresponds to the Elasticsearch built-in tracking system that tracks the changes in each document. By using _version...

When You Should Transform Your Data Instead of Using Aggregations

There are at least three use cases where you should consider using transforms instead of aggregations in Elasticsearch. First, when the...

X-Pack Basic Security is Off

The popularity of Elasticsearch has made it a target for hackers. It's important to protect your cluster by enabling X-Pack Security...

Yellow Status

Yellow status indicates that one or more of the replica shards on the Elasticsearch cluster are not allocated to a node. This could occur...

Zen Discovery Settings

Zen discovery settings for cluster formation were deprecated in Elasticsearch V.7 and should be removed from version 7 and above due to...

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