OpenSearch vs Redis

Migrate from Elasticsearch to OpenSearch with API-compatible clients and keep the same application code

Route CloudWatch logs to OpenSearch Service via Kinesis for centralized log search without leaving AWS

Store document embeddings and run hybrid text+vector search with the k-NN plugin to improve retrieval accuracy

Correlate AWS CloudTrail and VPC flow logs in OpenSearch to detect anomalous access patterns in near-real-time

Redis stores user session data with consistent sub-millisecond GET operations, handling 100K+ requests per second with a single instance where a database session store would create a bottleneck.

Redis INCR with EXPIRE implements sliding window rate limiting in 2 lines of code, enforcing per-user API quotas without adding a separate rate limiting service.

Redis Pub/Sub broadcasts events to thousands of connected subscribers in under 1ms, enabling real-time dashboards or notifications without polling the database.