# Reindex

**URL:** <https://discuss.elastic.co/t/reindex/47027>\
**Category:** Elasticsearch\
**Created:** [April 11, 2016, 6:37pm UTC](https://discuss.elastic.co/t/reindex/47027 "2016-04-11T18:37:58Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![pranesh002](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@pranesh002](https://discuss.elastic.co/u/pranesh002)\
**Post date:** [April 11, 2016, 6:37pm UTC](https://discuss.elastic.co/t/reindex/47027/1 "2016-04-11T18:37:58Z")

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Hi,

I have nearly 800 indices in PROD and now i have to change some mappings, is it possible to reindex all the indices at once? or do we need to reindex all one by one? and my indices are shield protected.

Thanks  
Pranesh

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**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\
**Post date:** [April 11, 2016, 7:11pm UTC](https://discuss.elastic.co/t/reindex/47027/2 "2016-04-11T19:11:02Z")

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> [@pranesh002](#):
>
> do we need to reindex all one by one?

You'll want to reindex them one by one so that you can monitor the progress, test the new indexes, and clean up the ones that you've replaced. `_reindex` the API is really designed to make this whole thing easier. Not automatic.

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**Author:** ![pranesh002](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@pranesh002](https://discuss.elastic.co/u/pranesh002)\
**Post date:** [April 11, 2016, 7:12pm UTC](https://discuss.elastic.co/t/reindex/47027/3 "2016-04-11T19:12:34Z")

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Thanks @nik9000

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**Author:** ![pranesh002](https://avatars.discourse-cdn.com/v4/letter/p/48db29/32.png) [@pranesh002](https://discuss.elastic.co/u/pranesh002)\
**Post date:** [April 12, 2016, 2:23pm UTC](https://discuss.elastic.co/t/reindex/47027/4 "2016-04-12T14:23:52Z")

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I am using version 2.0.0. I dont find any api \_reindex.  
Could you please let me know which plugin i can use it for reindex?

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**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\
**Post date:** [April 12, 2016, 3:06pm UTC](https://discuss.elastic.co/t/reindex/47027/5 "2016-04-12T15:06:29Z")

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> [@pranesh002](#):
>
> Could you please let me know which plugin i can use it for reindex?

It is built-in in versions \>= 2.3.0.

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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:** [July 5, 2017, 11:00pm UTC](https://discuss.elastic.co/t/reindex/47027/6 "2017-07-05T23:00:04Z")

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