# Concept cluster topology

**URL:** <https://forums.percona.com/t/concept-cluster-topology/6477>\
**Category:** Percona XtraDB Cluster 5.x\
**Created:** [July 25, 2018, 8:40am UTC](https://forums.percona.com/t/concept-cluster-topology/6477 "2018-07-25T08:40:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![royzon](https://avatars.discourse-cdn.com/v4/letter/r/bcef8e/32.png) [@royzon](https://forums.percona.com/u/royzon)\
**Post date:** [July 25, 2018, 8:40am UTC](https://forums.percona.com/t/concept-cluster-topology/6477/1 "2018-07-25T08:40:55Z")

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We want to cluster three Mysql masters on VM’s.  
-Two VM’s will run on SSD disks (450 write cycle).  
-One VM will run on an HDD disk (80mb write cycle).

Will the VM on the HDD slow down the performance from the Mysql servers on the SSD’s?