Advanced vSAN configuration in sync observed in vSAN Cluster "ClomRebalanceThreshold"

Products

• VMware vSAN

Issue/Introduction

Symptoms:

Skyline Health reports a warning under 'Advanced vSAN Configuration in Sync' due to a non-default ClomRebalanceThreshold value set on multiple hosts.

Environment

VMware vSAN 7.x

VMware vSAN 8.x

Cause

• This issue appears under vSAN Skyline Health when multiple hosts have the ClomRebalanceThreshold value set to a non-default value, which is anything other than 80 

Resolution

• The vSAN datastore utilization must be below 70% in order to set the ClomRebalanceThreshold value to 80%.
• Set the clom rebalance threshold advanced configuration option /VSAN/ClomRebalanceThreshold to 80% on all ESXi hosts using the following steps to address the issue:
• In the vSphere client, select the host in the vSAN cluster
• Click Configure
• Select System >  Advanced System Settings
• Edit and filter for ClomRebalanceThreshold
• Select ClomRebalanceThreshold and adjust Value to 80%
• ssh into all the hosts and execute the below command on all hosts  to set the value to default.
  
  
• esxcfg-advcfg -s 80 /VSAN/ClomRebalanceThreshold
• esxcfg-advcfg -g /VSAN/ClomRebalanceThreshold
• Restart clomd service on all hosts.
• /etc/init.d/clomd restart