Page Comparison

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https://aws.amazon.com/blogs/big-data/lower-your-amazon-opensearch-service-storage-cost-with-gp3-amazon-ebs-volumes/

Conclusion

To optimize the AWS OpenSearch cluster, there are three key decisions to make:

1. Choose the appropriate instance type to use, either r6g.large or r6g.xlarge.
2. Determine the number of nodes and replica counts required. Now used 2 nodes and 2 replicas.
3. Choose the appropriate storage type, either gp2 or gp3.

Based on the requirements and the spike analysis, it is recommended to use r6g.large instance type with 2 nodes and 1 replica count. In addition, it is recommended to use gp3 storage type for better performance.

To summarize:

1. Instance type: r6g.large or r6g.xlarge 
2. Number of nodes and replica count: 2 nodes with 1 replica
3. Storage type: gp3