# Calculate disk space requirement for increasing replicas

**URL:** <https://discuss.elastic.co/t/calculate-disk-space-requirement-for-increasing-replicas/327552>\
**Category:** Elasticsearch\
**Created:** [March 13, 2023, 12:57pm UTC](https://discuss.elastic.co/t/calculate-disk-space-requirement-for-increasing-replicas/327552 "2023-03-13T12:57:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jaykb77](https://avatars.discourse-cdn.com/v4/letter/j/ac8455/32.png) [@jaykb77](https://discuss.elastic.co/u/jaykb77)\
**Post date:** [March 13, 2023, 12:57pm UTC](https://discuss.elastic.co/t/calculate-disk-space-requirement-for-increasing-replicas/327552/1 "2023-03-13T12:57:30Z")

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Im planning to increase replication of some of our indices and trying to understand the additional disk required for this. Looking at the test index below(1p:2r, store.size = 45mb, pri.store.size=15mb) would it be accurate to conclude that I would need 15mb more in the cluster if I increase replication by 1 and 30mb more if I increase it by 2 ?

```auto
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
green open test_index_XXXXXXXXX AvRInVVWSnOWvfIQGNxD-g 1 2 55937 3 45 15

```

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [March 19, 2023, 11:04pm UTC](https://discuss.elastic.co/t/calculate-disk-space-requirement-for-increasing-replicas/327552/2 "2023-03-19T23:04:22Z")

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> [@jaykb77](#):
>
> would it be accurate to conclude that I would need 15mb more in the cluster if I increase replication by 1 and 30mb more if I increase it by 2 ?

I would allow more just in case, but yes that's an accurate summary.

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<div class="post-metadata">

**Author:** ![jaykb77](https://avatars.discourse-cdn.com/v4/letter/j/ac8455/32.png) [@jaykb77](https://discuss.elastic.co/u/jaykb77)\
**Post date:** [March 20, 2023, 6:29am UTC](https://discuss.elastic.co/t/calculate-disk-space-requirement-for-increasing-replicas/327552/3 "2023-03-20T06:29:52Z")

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Thank you 🙂

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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:** [April 17, 2023, 6:30am UTC](https://discuss.elastic.co/t/calculate-disk-space-requirement-for-increasing-replicas/327552/4 "2023-04-17T06:30:11Z")

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