Online index migration and shard scaling in OpenSearch with the AOSC plugin
OpenSearch

Online index migration and shard scaling in OpenSearch with the AOSC plugin


Summary

The AOSC (Automatic Online Schema Change) plugin for OpenSearch enables live index migrations with different mappings, settings, or shard counts within a single cluster. It automates the complex workflow of backfilling existing documents and replaying concurrent writes, concluding with an alias swap after a brief, controlled write block to ensure data integrity.
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