Reindex API
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What is Reindex API?
The Reindex API in Elasticsearch allows you to copy documents from one index to another. This is useful for a variety of tasks, including changing the mapping of an index, upgrading to a new Elasticsearch version, or splitting a large index into smaller ones. It essentially reads documents from a source index and writes them into a destination index, optionally applying transformations along the way.
Free resources to learn Reindex API
More in stage 5: Controlling Search Results
Reindex API: common questions
Can I learn Reindex API in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Reindex API in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Reindex API tutorial for beginners?
It is lesson 64 of 113 in the free Elasticsearch roadmap, in stage 5, Controlling Search Results. If you are new to Elasticsearch, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.