# Performance impact of running a cluster on SSL

**URL:** <https://discuss.elastic.co/t/performance-impact-of-running-a-cluster-on-ssl/199845>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-security\
**Created:** [September 17, 2019, 3:16pm UTC](https://discuss.elastic.co/t/performance-impact-of-running-a-cluster-on-ssl/199845 "2019-09-17T15:16:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kapad](https://avatars.discourse-cdn.com/v4/letter/k/e8c25b/32.png) [@kapad](https://discuss.elastic.co/u/kapad)\
**Post date:** [September 17, 2019, 3:16pm UTC](https://discuss.elastic.co/t/performance-impact-of-running-a-cluster-on-ssl/199845/1 "2019-09-17T15:16:29Z")

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My organization is considering whether to run our ES clusters on SSL and I've been tasked with evaluating the performance impact of a cluster on SSL vs a cluster over plain TCP/HTTP.  
Since there are two modes of communication, 1. Within the cluster (between nodes of the cluster) and 2. With clients of the cluster (over https), I will need to evaluate the performance impact of both.

I was wondering if anyone in this community has done a similar evaluation and has any performance testing setup that I could reuse or has results that they would be willing to share with me.

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**Author:** ![ikakavas](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ikakavas/32/34430_2.png) [@ikakavas](https://discuss.elastic.co/u/ikakavas)\
**Post date:** [September 24, 2019, 8:59pm UTC](https://discuss.elastic.co/t/performance-impact-of-running-a-cluster-on-ssl/199845/2 "2019-09-24T20:59:43Z")

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You could definitely use [Rally](https://github.com/elastic/rally) for this.

We are publishing our benchmarks at [https://elasticsearch-benchmarks.elastic.co/](https://elasticsearch-benchmarks.elastic.co/) for different use cases with and without security enabled, so these might also be of use to you for your evaluation.

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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:** [October 22, 2019, 8:59pm UTC](https://discuss.elastic.co/t/performance-impact-of-running-a-cluster-on-ssl/199845/3 "2019-10-22T20:59:48Z")

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