# Difference between primary store size and store size

**URL:** <https://discuss.elastic.co/t/difference-between-primary-store-size-and-store-size/24016>\
**Category:** Elasticsearch\
**Created:** [June 19, 2015, 8:05pm UTC](https://discuss.elastic.co/t/difference-between-primary-store-size-and-store-size/24016 "2015-06-19T20:05:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sagarshah1983](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sagarshah1983/32/3403_2.png) [@sagarshah1983](https://discuss.elastic.co/u/sagarshah1983)\
**Post date:** [June 19, 2015, 8:05pm UTC](https://discuss.elastic.co/t/difference-between-primary-store-size-and-store-size/24016/1 "2015-06-19T20:05:32Z")

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Hello everyone,  
I am using Elastic search 1.4.2.  
I am trying to analyze Elastic Search Space using \_cat/indices API.  
I see 2 different columns related to disk space, Store Size and Primary store size.  
I see that store size (at certain times) is double than primary store size. Why so?

Which size is actually taken by OS for disk space storage?  
Can anyone explain?

Appreciate your inputs!

Regards,  
Sagar Shah

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**Author:** ![Jason\_Wee](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jason\_Wee](https://discuss.elastic.co/u/Jason_Wee)\
**Post date:** [June 19, 2015, 11:35pm UTC](https://discuss.elastic.co/t/difference-between-primary-store-size-and-store-size/24016/2 "2015-06-19T23:35:19Z")

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from \_cat/indices api help.

> store.size | ss,storeSize | store size of primaries & replicas  
> pri.store.size | | store size of primaries

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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, 12:06am UTC](https://discuss.elastic.co/t/difference-between-primary-store-size-and-store-size/24016/3 "2017-07-06T00:06:22Z")

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