Patterns for updating Amazon OpenSearch Service index settings and mappings
AWS Big Data
APRIL 6, 2023
One the major advantages of using the _reindex operation is that it doesn’t require placing the source index in a read-only mode (data producers may continue to write the data while reindexing is in progress). With the _reindex operation, you can copy all or a subset of documents that you select through a query to another index.
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