While visibility of cluster performance is important, so too is performance at the host level. Virtual machine consumption as well as back end metrics are visible specific to the host selected, as well as additional metrics.

 

In addition, because vSAN requires at least one disk group, but can be configured with up to five disk groups on each host in the cluster, it is important to be able to distinguish, from an operational perspective, how each disk group is performing, independent of any other disk groups on the same host.

 

As previously outlined, each disk group in a vSAN host requires one cache device and one to seven capacity devices. Just as it is important to be able to distinguish different disk groups’ performance, it is also important to have visibility to the performance metrics of a single device.