MCP For Claude Marketplace
OpenSearch Shard Calculator

OpenSearch Shard Calculator MCP Connector for Claude

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Deterministic AWS OpenSearch shard distribution and resource allocation calculator.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

This MCP server provides precise calculations for AWS OpenSearch cluster architecture. Use calculate_shard_distribution to determine primary and total shard counts based on your index size and target shard size. Use calculate_cluster_limits_and_health to evaluate shard density per node and overall cluster stability. Finally, use recommend_resource_and_performance_settings to obtain optimized JVM heap sizes, garbage collection recommendations, and refresh intervals for your specific workload. It helps prevent common issues like excessive shard density or undersized JVM heaps.

opensearchawsshardingcluster-managementdevops

3 tools expose this connector's capabilities to your AI agent.

calculate_cluster_limits_and_health

calculate_shard_distribution

recommend_resource_and_performance_settings

See how to talk to your AI agent using OpenSearch Shard Calculator.

I have 500 GB of data across 10 indices. I want each shard to be 30 GB. How many shards do I need and how many replicas should I consider?

For 500 GB across 10 indices with a 30 GB target, you will need 17 primary shards in total (2 per index, rounded up). If you use 1 replica, your total shard count will be 34.

My OpenSearch node has 64 GB of RAM. I am running a write-heavy workload. What are my recommended settings?

For a 64 GB instance with a write-heavy workload, the recommended JVM heap size is 32 GB. It is recommended to use the G1GC garbage collector, and you should increase the refresh interval to accommodate high indexing volume.

I have 5000 total shards across 5 data nodes. Is this a problem?

With 5000 total shards across 5 nodes, you have 1000 shards per node. This is at the upper limit of the recommended density and may impact performance.

You can use the `calculate_cluster_limits_and_health` tool. It will return a flag if the shards per node exceeds the recommended limit of 1000.

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