# Cross cluster search

**URL:** <https://discuss.elastic.co/t/cross-cluster-search/259788>\
**Category:** Elasticsearch\
**Tags:** ccs-cross-cluster-search\
**Created:** [December 29, 2020, 9:29am UTC](https://discuss.elastic.co/t/cross-cluster-search/259788 "2020-12-29T09:29:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![kannan\_raj](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kannan_raj/32/63201_2.png) [@kannan\_raj](https://discuss.elastic.co/u/kannan_raj)\
**Post date:** [December 29, 2020, 9:29am UTC](https://discuss.elastic.co/t/cross-cluster-search/259788/1 "2020-12-29T09:29:52Z")

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we have more than 20 elasticsearch cluster and we are planning to use cross cluster search for searching the data across all the cluster.  
could you please let me know that is there any limitation for adding remote clusters ?  
what is the max number remote clusters that we can add ?

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**Author:** ![ylasri](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ylasri/32/86120_2.png) [@ylasri](https://discuss.elastic.co/u/ylasri)\
**Post date:** [December 29, 2020, 9:50am UTC](https://discuss.elastic.co/t/cross-cluster-search/259788/2 "2020-12-29T09:50:05Z")

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AFAIK there is no limitation son the number of clusters  
May be at the master cluster with clients nodes need some ressources to aggregates all remotes searches and present them to the client

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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:** [December 30, 2020, 10:29pm UTC](https://discuss.elastic.co/t/cross-cluster-search/259788/3 "2020-12-30T22:29:28Z")

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There's no technical limit that I am aware of.  
You might run into a practical one, depending on how large your clusters are.

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<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:** [January 27, 2021, 10:29pm UTC](https://discuss.elastic.co/t/cross-cluster-search/259788/4 "2021-01-27T22:29:45Z")

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