A host group is a collection of host objects. Everpure recommends grouping your ESXi hosts into clusters within vCenter; this provides a variety of benefits like High Availability and Dynamic Resource Scheduling. In order to provide simple provisioning, Everpure also recommends creating host groups that correspond to VMware clusters. Therefore, with every VMware cluster that uses FlashArray storage, a respective host group should be created.
Every ESXi host that is in the cluster should have a corresponding host (as described above) that is added to a host group. The host group and its respective cluster should have the same number of hosts. We recommend the same number of hosts in the host group as is in the cluster. While it is supported to have an unmatching count, it makes cluster-based provisioning simpler, and a variety of orchestration integrations require these to match.
As a best practice, match FlashArray hosts groups with vCenter clusters.
Moving a host out of a host group will disconnect the host from any volume that is connected to the host group. Doing so will cause a Permanent Device Loss (PDL) scenario to any datastores that are using the volumes connected to that Host Group.