# Xpack prerequisites

**URL:** <https://discuss.elastic.co/t/xpack-prerequisites/107784>\
**Category:** Elasticsearch\
**Created:** [November 15, 2017, 4:22pm UTC](https://discuss.elastic.co/t/xpack-prerequisites/107784 "2017-11-15T16:22:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cedric1](https://avatars.discourse-cdn.com/v4/letter/c/8e8cbc/32.png) [@cedric1](https://discuss.elastic.co/u/cedric1)\
**Post date:** [November 15, 2017, 4:22pm UTC](https://discuss.elastic.co/t/xpack-prerequisites/107784/1 "2017-11-15T16:22:02Z")

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Hi,

I would like to know what are the minimum prerequisites to install Xpack,  
Number of ES nodes, cpu, RAM, etc..

Is there any table that shows what we should need for a minimum production installation depending on the data we store in ES ?

I have red somewhere that three nodes is a minimum for an ES cluster, should I add a supplementary node to install Xpack on it?

Best regards.

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<div class="post-metadata">

**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:** [November 15, 2017, 6:43pm UTC](https://discuss.elastic.co/t/xpack-prerequisites/107784/2 "2017-11-15T18:43:56Z")

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Unless you are running large numbers of ML jobs, you don't need to do anything other than install X-Pack on all your nodes. As you indicate, 3 nodes is a minimum viable cluster 🙂

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<div class="post-metadata">

**Author:** ![cedric1](https://avatars.discourse-cdn.com/v4/letter/c/8e8cbc/32.png) [@cedric1](https://discuss.elastic.co/u/cedric1)\
**Post date:** [November 16, 2017, 9:45am UTC](https://discuss.elastic.co/t/xpack-prerequisites/107784/3 "2017-11-16T09:45:50Z")

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Great, thank you for your quick answer,

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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 14, 2017, 9:45am UTC](https://discuss.elastic.co/t/xpack-prerequisites/107784/4 "2017-12-14T09:45:54Z")

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