# What is the best way to compress a snapshot data?

**URL:** <https://discuss.elastic.co/t/what-is-the-best-way-to-compress-a-snapshot-data/35990>\
**Category:** Elasticsearch\
**Created:** [December 1, 2015, 7:18am UTC](https://discuss.elastic.co/t/what-is-the-best-way-to-compress-a-snapshot-data/35990 "2015-12-01T07:18:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![notxcain](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/notxcain/32/48115_2.png) [@notxcain](https://discuss.elastic.co/u/notxcain)\
**Post date:** [December 1, 2015, 7:18am UTC](https://discuss.elastic.co/t/what-is-the-best-way-to-compress-a-snapshot-data/35990/1 "2015-12-01T07:18:33Z")

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We have a lot of data in our daily indexes (like 200GB), so what is the best way to compress a daily index snapshot. As we need to store some of them up to 6 month due to legal requirements.

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**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [December 1, 2015, 7:36am UTC](https://discuss.elastic.co/t/what-is-the-best-way-to-compress-a-snapshot-data/35990/2 "2015-12-01T07:36:55Z")

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I think you could read that: [https://www.elastic.co/blog/store-compression-in-lucene-and-elasticsearch?q=compress%20blog](https://www.elastic.co/blog/store-compression-in-lucene-and-elasticsearch?q=compress%20blog)

So basically when you have cold data, change the compression type and call `_optimize` to create new segments with the new compression.

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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, 11:34pm UTC](https://discuss.elastic.co/t/what-is-the-best-way-to-compress-a-snapshot-data/35990/3 "2017-07-05T23:34:35Z")

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