# Rally tests on a running cluster

**URL:** <https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188>\
**Category:** Elasticsearch\
**Tags:** rally\
**Created:** [November 11, 2018, 9:22am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188 "2018-11-11T09:22:07Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![yossib](https://avatars.discourse-cdn.com/v4/letter/y/a6a055/32.png) [@yossib](https://discuss.elastic.co/u/yossib)\
**Post date:** [November 11, 2018, 9:22am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188/1 "2018-11-11T09:22:07Z")

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hi,

I have a 3 node cluster, it is in production... how can I test it with rally without damaging it's performance?

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**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [November 11, 2018, 9:31am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188/2 "2018-11-11T09:31:39Z")

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Not sure I understand the question. If you use Rally to put load on a production cluster it will naturally affect any other traffic to that cluster. What is it you are trying to achieve?

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**Author:** ![yossib](https://avatars.discourse-cdn.com/v4/letter/y/a6a055/32.png) [@yossib](https://discuss.elastic.co/u/yossib)\
**Post date:** [November 11, 2018, 9:52am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188/3 "2018-11-11T09:52:08Z")

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I want to check my HW and configurations, to see if any improvements can be made

Never tried rally before, how can I know it won't stress my cluster into breaking it?

Sincerely Yours,

Yossi Baruch, Cyber and IT specialist

office: +972-3-646-0569

fax: +972-3-646-0557

_ **MTFBWY** _

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**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\
**Post date:** [November 11, 2018, 10:43am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188/5 "2018-11-11T10:43:07Z")

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I suspect you will need to configure a custom track and use rate limiting to slowly increase the load. I would however recommend running it against a test cluster instead if possible.

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<div class="post-metadata">

**Author:** ![yossib](https://avatars.discourse-cdn.com/v4/letter/y/a6a055/32.png) [@yossib](https://discuss.elastic.co/u/yossib)\
**Post date:** [November 11, 2018, 10:57am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188/6 "2018-11-11T10:57:26Z")

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Well, running on a test node is not something we can do...

I'll try limiting the load

thanks

Yossi Baruch,

MTFBWYA

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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:** [December 9, 2018, 10:57am UTC](https://discuss.elastic.co/t/rally-tests-on-a-running-cluster/156188/7 "2018-12-09T10:57:36Z")

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