# Re-index within elastic search

**URL:** <https://discuss.elastic.co/t/re-index-within-elastic-search/4107>\
**Category:** Elasticsearch\
**Created:** [March 16, 2011, 5:11am UTC](https://discuss.elastic.co/t/re-index-within-elastic-search/4107 "2011-03-16T05:11:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sumzitup](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@sumzitup](https://discuss.elastic.co/u/sumzitup)\
**Post date:** [March 16, 2011, 5:11am UTC](https://discuss.elastic.co/t/re-index-within-elastic-search/4107/1 "2011-03-16T05:11:31Z")

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Hi There,

I want to know if it is at all possible to re-index within elastic search after updating the mapping instead of re-indexing from the original document source. I assume this is possible as ES keeps the \_source of each document?

Thanks for your time.

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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 6, 2017, 4:09am UTC](https://discuss.elastic.co/t/re-index-within-elastic-search/4107/2 "2017-07-06T04:09:59Z")

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