# Sizing Parameters for deploying SIEM

**URL:** <https://discuss.elastic.co/t/sizing-parameters-for-deploying-siem/228240>\
**Category:** SIEM\
**Created:** [April 16, 2020, 4:29am UTC](https://discuss.elastic.co/t/sizing-parameters-for-deploying-siem/228240 "2020-04-16T04:29:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Blason](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/blason/32/42284_2.png) [@Blason](https://discuss.elastic.co/u/Blason)\
**Post date:** [April 16, 2020, 4:29am UTC](https://discuss.elastic.co/t/sizing-parameters-for-deploying-siem/228240/1 "2020-04-16T04:29:18Z")

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Hi Guys,

I am planning to test out SIEM app in production and I have around 70-80 servers [60 of are those Windows/rest are all Linux/Unix] then have PAN Firewall, 4-5 Cisco routers.

So around 90 off devices that needs to be monitored. the log retention period will be around 6 months.

Can someone please give me insight about elastic search host sizing parameters like

1. How many hosts I must adapt? Like one for Elastic search, other for logstash etc.
2. If I must adopt elasticsearch cluster for data resiliency
3. What should be the ideal memory/cpu/cores each node must have?
4. Any other advice?

TIA  
Blason R

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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:** [May 14, 2020, 4:29am UTC](https://discuss.elastic.co/t/sizing-parameters-for-deploying-siem/228240/2 "2020-05-14T04:29:20Z")

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