Intro

• Successor to ElasticSearch (renamed due to some licensing issues)
• Used in combination with a database to perform enhanced search operations on the database (can search on any field, even supports partial matches)
• Need to provision a cluster of instances (pay for provisioned instances) (not serverless)
• Comes with OpenSearch Dashboard for visualization
• Does not support SQL (has its own query language)
• Supports Multi-AZ
• Used in Big Data
• Security through IAM, Cognito, KMS and TLS

Patterns

OpenSearch on DynamoDB

OpenSearch provides features like search on any column or partial matches and returns the item IDs that will be used to fetch items from the main table.

OpenSearch on CloudWatch Logs

Subscription filter is used to get logs in real time which can be pushed in real time using a Lambda function or near real time using KDF. This provides advanced search capabilities on the logs.

OpenSearch on Kinesis