Mixing Hosts with Hybrid and All-Flash Disk Groups is not supported in vSAN

Products

• VMware vSAN

Issue/Introduction

Symptoms:

It is not supported to mix hybrid and all flash hosts in a single vSAN cluster.

This type of configuration would cause multiple performance issues, due to some of the following reasons:

1. The Hosts with All-Flash Disk Groups would operate and perform at much higher speeds than Hosts with Hybrid Disk Groups. When the Hybrid Hosts are not able to function at the same speed, queuing issues can occur, which may lead to data inconsistency and potential congestion.
2. The mixed configuration complicates the operational aspects of vSAN, such as monitoring of disk space, balancing components, etc.

Resolution

 

 

Additional Information

For more information, see:

• vSAN Plan and Design