<ul><li>The Split Index API in OpenSearch allows you to split an existing index into multiple smaller indices.</li><li>The Split Index API enables you to divide a large index into smaller ones by increasing the number of primary shards.</li><li>Requirements for splitting an index include setting it to read-only state, defining routing allocation, and ensuring the new number of shards is a multiple of the original.</li><li>The Split Index API is useful for improving performance, scaling the index, or rebalancing data without re-ingesting it.</li></ul>

OpenSearch Split Index API

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