OpenSearch Basics

How to Install OpenSearch on EC2 Using Terraform

To install OpenSearch on EC2, you will need a route-53 resource that connects to your VPC. The Terraform module will deploy 3 EBS, 5 EC2...

How to Install OpenSearch on Kubernetes (Using HELM charts)

Helm is the best way to find, share, and use software built for Kubernetes. To install OpenSearch using Helm charts, you need to first...

How to Migrate from Elasticsearch to OpenSearch

OpenSearch supports migration to Elasticsearch using rolling upgrades. There're 4 methods to migrate data from Elasticsearch to OpenSearch...

How to migrate from Elasticsearch to OpenSearch for versions after 7.10

If you’re using Elasticsearch version 7.11 or later, you cannot use rolling upgrades to migrate to OpenSearch. Instead, you can use these...

How to Set Up & Operate OpenSearch on Kubernetes Using the Open-Source Operator

Installation instructions, advantages of using the Operator for OpenSearch management, tips and benefits of...

How to Set Up Alerting in OpenSearch

There are 3 types of OpenSearch alerts: system, logs, & business specific. Before creating an alert you need to set a channel. An example...

OpenSearch Aggregation

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

OpenSearch Alias

An OpenSearch alias is a secondary name to refer to one or more indices. Aliases can be created and deleted dynamically using...

OpenSearch Bulk

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

OpenSearch Cache: Node Request, Shard Data & Field Data Cache

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

OpenSearch Circuit Breaker Exceptions: How to Handle Circuit Breakers

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

OpenSearch Delete By Query

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

OpenSearch Docker - How to Spin Up a Cluster Using Docker

The easiest way to start testing OpenSearch is running the available docker image. To spin up an OpenSearch cluster using docker, you need...

OpenSearch Document

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

OpenSearch Filter

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

OpenSearch Heap Size Usage and JVM Garbage Collection

The OpenSearch heap size is the amount of RAM allocated to the JVM of a node. When JVM performance is not optimal...

OpenSearch High CPU

High CPU in OpenSearch is often a symptom of other underlying issues. It should be fixed since a distressed node will slow query response...

OpenSearch Index

An OpenSearch index contains a schema and can have one or more shards and replicas. Here's how to create, delete, list, and query an index.

OpenSearch Mapping

An OpenSearch mapping contains the properties of each field in the index. A common issue is an incorrectly defined mapping. To update...

OpenSearch Max Shards Per Node Exceeded

If the max of shards per node is exceeded in OpenSearch, shards can't be allocated. To fix this, check to see whether the limit is at...

OpenSearch Nodes & Node Roles

There are different types of OpenSearch nodes. Each has its own role and purpose. Cluster-Manager, coordinating and data node roles differ...

OpenSearch Observability Visualizations: How to Use Notebooks and Operational Panels

Dashboards are the most useful tool to visualize data without having to code an entire framework that consumes data from the engine...

OpenSearch Queue

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

OpenSearch Rebalance

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

OpenSearch Recovery

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

OpenSearch Red Status

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

OpenSearch Refresh Interval

OpenSearch requires a refresh operation to make indexed information available for search. You can set an OpenSearch refresh_interval by...

OpenSearch Replication

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

OpenSearch Restore

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

OpenSearch Shards Too Large

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

OpenSearch Snapshot

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

OpenSearch Task

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

OpenSearch Threadpool

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

OpenSearch Yellow Status

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

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