# How to reindex only 1 shard of source\_index to a destination\_index?

**URL:** <https://discuss.elastic.co/t/how-to-reindex-only-1-shard-of-source-index-to-a-destination-index/298301>\
**Category:** Elasticsearch\
**Created:** [February 25, 2022, 4:14pm UTC](https://discuss.elastic.co/t/how-to-reindex-only-1-shard-of-source-index-to-a-destination-index/298301 "2022-02-25T16:14:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ztesky](https://avatars.discourse-cdn.com/v4/letter/z/47e85d/32.png) [@ztesky](https://discuss.elastic.co/u/ztesky)\
**Post date:** [February 25, 2022, 4:14pm UTC](https://discuss.elastic.co/t/how-to-reindex-only-1-shard-of-source-index-to-a-destination-index/298301/1 "2022-02-25T16:14:32Z")

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Using Re-index API is it possible to incrementally move data only belonging to a certain shard of source\_index (which has routing set up by productId) to another shard of a destination\_index in the same cluster?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 25, 2022, 4:14pm UTC](https://discuss.elastic.co/t/how-to-reindex-only-1-shard-of-source-index-to-a-destination-index/298301/2 "2022-03-25T16:14:50Z")

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