Virtual SAN automatically rebalances the Virtual SAN cluster when a capacity device reaches 80 percent utilization. Rebalancing also occurs when you place a Virtual SAN host in maintenance mode.Its By Default.
Run the following RVC commands to monitor the rebalance operation in the cluster:
vsan.check_limits. Verifies whether the disk space utilization is balanced in the cluster.
vsan.whatif_host_failures. Analyzes the current capacity utilization per host, interprets whether a single host failure can force the cluster to run out of space for reprotection, and analyzes how a host failure might impact cluster capacity, cache reservation, and cluster components.
The physical capacity usage shown as the command output is the average usage of all devices in the Virtual SAN cluster.
vsan.resync_dashboard. Monitors any rebuild tasks in the cluster.