# Elasticsearch rack or zone awareness limitation

**URL:** <https://discuss.elastic.co/t/elasticsearch-rack-or-zone-awareness-limitation/137715>\
**Category:** Elasticsearch\
**Created:** [June 28, 2018, 2:07am UTC](https://discuss.elastic.co/t/elasticsearch-rack-or-zone-awareness-limitation/137715 "2018-06-28T02:07:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anon17386273](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@anon17386273](https://discuss.elastic.co/u/anon17386273)\
**Post date:** [June 28, 2018, 2:07am UTC](https://discuss.elastic.co/t/elasticsearch-rack-or-zone-awareness-limitation/137715/1 "2018-06-28T02:07:38Z")

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Hi

I am intending to set up a multi jvm nodes on one machine.  
I have 4 racks and 12 powerful machines in each of these racks.  
As such, i am using rack and zone awareness to ensure the replicas are nicely distributed.

My question here:  
Is there any limitation in the number of zone or rack that can be assigned?  
And is there any caveat in doing this?

My setup would be something like this

Eg. Rack 1  
Description: Machine 1 with 2 JVM  
nodename: segment1, segment2  
zone: node1  
rack: rack1

Description: Machine 2 with 2 JVM  
nodename: segment3, segment4  
zone: node2  
rack: rack1

...

Eg. Rack 2  
Description: Machine 13 with 2 JVM  
nodename: segment25, segment26  
zone: node13  
rack: rack2

Description: Machine 14 with 2 JVM  
nodename: segment27, segment28  
zone: node14  
rack: rack2

...

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<div class="post-metadata">

**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:** [June 28, 2018, 5:43am UTC](https://discuss.elastic.co/t/elasticsearch-rack-or-zone-awareness-limitation/137715/2 "2018-06-28T05:43:25Z")

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I think this is perfectly fine.

Sounds like you are building a big cluster here. 😉  
Out of curiosity, what kind of use case do you have?

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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 26, 2018, 5:57am UTC](https://discuss.elastic.co/t/elasticsearch-rack-or-zone-awareness-limitation/137715/3 "2018-07-26T05:57:55Z")

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