# Effeciency of cross cluster search

**URL:** <https://discuss.elastic.co/t/effeciency-of-cross-cluster-search/198465>\
**Category:** Elasticsearch\
**Created:** [September 6, 2019, 6:07pm UTC](https://discuss.elastic.co/t/effeciency-of-cross-cluster-search/198465 "2019-09-06T18:07:40Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![divyang](https://avatars.discourse-cdn.com/v4/letter/d/7ea924/32.png) [@divyang](https://discuss.elastic.co/u/divyang)\
**Post date:** [September 6, 2019, 6:07pm UTC](https://discuss.elastic.co/t/effeciency-of-cross-cluster-search/198465/1 "2019-09-06T18:07:40Z")

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Hi,  
I want to query an elastic index across different clusters in different data centers . I need to query it to generate a consolidated report. I have some questions  
1] Will cardinality and nested aggregations give accurate results across different clusters for different DCs ?  
2] How good is the perfomance of a cross cluster search with minimum round trips against a single cluster search ?  
3] How is Cross Cluster Replication then a Search Versus Cross Cluster Search?

Any other suggestions are welcome .

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**Author:** ![YvorL](https://avatars.discourse-cdn.com/v4/letter/y/9fc348/32.png) [@YvorL](https://discuss.elastic.co/u/YvorL)\
**Post date:** [October 4, 2019, 10:48am UTC](https://discuss.elastic.co/t/effeciency-of-cross-cluster-search/198465/2 "2019-10-04T10:48:25Z")

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Hi,

Bumping the question, I'd like to know about cardinality results too.

YvorL

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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:** [November 1, 2019, 10:48am UTC](https://discuss.elastic.co/t/effeciency-of-cross-cluster-search/198465/3 "2019-11-01T10:48:26Z")

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