# Why doesn't the size of my index double with replicas?

**URL:** <https://discuss.elastic.co/t/why-doesnt-the-size-of-my-index-double-with-replicas/117160>\
**Category:** Elasticsearch\
**Created:** [January 26, 2018, 7:17am UTC](https://discuss.elastic.co/t/why-doesnt-the-size-of-my-index-double-with-replicas/117160 "2018-01-26T07:17:35Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![cemremengu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cemremengu/32/26943_2.png) [@cemremengu](https://discuss.elastic.co/u/cemremengu)\
**Post date:** [January 26, 2018, 7:17am UTC](https://discuss.elastic.co/t/why-doesnt-the-size-of-my-index-double-with-replicas/117160/1 "2018-01-26T07:17:35Z")

</div>

With or without the replicas I see that the disk size of my index is reported as the same.

I expected it to double since replicas hold the exact copies. Is size really the same or just reported the same for brevity?

---

<div class="post-metadata">

**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [January 26, 2018, 8:31am UTC](https://discuss.elastic.co/t/why-doesnt-the-size-of-my-index-double-with-replicas/117160/2 "2018-01-26T08:31:12Z")

</div>

Has the replica shard been assigned to a node in the cluster? You can see this using the [cat shards API](https://www.elastic.co/guide/en/elasticsearch/reference/6.1/cat-shards.html).

---

<div class="post-metadata">

**Author:** ![cemremengu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/cemremengu/32/26943_2.png) [@cemremengu](https://discuss.elastic.co/u/cemremengu)\
**Post date:** [January 30, 2018, 1:30pm UTC](https://discuss.elastic.co/t/why-doesnt-the-size-of-my-index-double-with-replicas/117160/3 "2018-01-30T13:30:03Z")

</div>

Yes they are all assigned (STARTED) but I think the GUI I am using (cerebro) omits replica sizes since I can see that it occupies twice the amount on disk when I check.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 27, 2018, 1:30pm UTC](https://discuss.elastic.co/t/why-doesnt-the-size-of-my-index-double-with-replicas/117160/4 "2018-02-27T13:30:45Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.