The vSAN Capacity dashboard complements the vSphere Cluster Capacity dashboard by displaying capacity related to vSAN. To manage vSAN capacity, use both dashboards.

Design Considerations

The dashboard focuses on vSAN specific metrics, but does not list non-vSAN clusters.

See Capacity Dashboards for common design considerations among all the dashboards for capacity management.

How to Use the Dashboard

  • Overall Analysis

    The Clusters by Capacity Remaining and Clusters by Time Remaining bar charts focus on vSAN disk space and not compute and network.

    Use the vSAN Clusters table to view vSAN specific metrics.

  • Cluster Analysis

    Select a vSAN cluster from the vSAN Clusters table. The detailed capacity is automatically displayed.

    The Utilization widget displays the utilization for all three elements, as you need to consider all three. Network is not shown as typically it is not a problem.

    Like a physical array, there can be hot spots and imbalance. The Is Disk Group Space Utilization Balanced heat map displays individual disk groups.

    Reclaimable storage is a key component of proactive capacity management. You can view details for both VMs and non-VMs.

    You can view the Dedupe and Compressed scoreboard for more details in this area.

  • Disk Group Analysis

    If there is imbalance, you can analyze each disk group. The Disk Groups Selected in Selected vSAN Cluster displays all the disk groups in the cluster. Their usage may not be similar, but should not deviate drastically. To view the disk group usage trend, click on a disk group.

  • VM Analysis

    You can analyze individual VMs in the selected cluster from the VMs in the selected vSAN Cluster table and check their usage and snapshot. To view the trend in Usage, click on a VM. In addition, the relevant configurations of the VM is displayed.