# Data distribute in large cluster with many indices

**URL:** <https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428>\
**Category:** Elasticsearch\
**Created:** [August 26, 2017, 3:14am UTC](https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428 "2017-08-26T03:14:44Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![sunchnaras](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sunchnaras/32/13408_2.png) [@sunchnaras](https://discuss.elastic.co/u/sunchnaras)\
**Post date:** [August 26, 2017, 3:14am UTC](https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428/1 "2017-08-26T03:14:45Z")

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Hi,  
I have a cluster with 30 nodes and a lot of indices with small number of primary shards . Let's say 800 indices . most indices only have 1 or 2 primary shards.  
I want to know how elasticsearch cluster distribute data across the cluster such a lot of small indices?  
Does all nodes in cluster receive data evenly ? or near evenly ?  
Thanks,  
Sun Chanras

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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:** [August 26, 2017, 4:59am UTC](https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428/2 "2017-08-26T04:59:19Z")

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It does it based on shard count per node, so that each node has a similar/same number of shards.  
It doesn't look at the shard size, but does take the node's disk space into account.

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<div class="post-metadata">

**Author:** ![sunchnaras](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sunchnaras/32/13408_2.png) [@sunchnaras](https://discuss.elastic.co/u/sunchnaras)\
**Post date:** [August 26, 2017, 5:46am UTC](https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428/3 "2017-08-26T05:46:03Z")

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Thank you @warkolm .  
The shards going to re-balance automatically if I add more nodes in the future ?

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<div class="post-metadata">

**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:** [August 26, 2017, 6:23am UTC](https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428/4 "2017-08-26T06:23:28Z")

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Yes they will.

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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:** [September 23, 2017, 6:23am UTC](https://discuss.elastic.co/t/data-distribute-in-large-cluster-with-many-indices/98428/5 "2017-09-23T06:23:44Z")

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