An application volume group is a logical grouping of volumes associated with an application. The group may contain one or more volumes. All the volumes in the application volume group must be selected from the same disk group. The volumes may belong to a private or shared disk group. Set the maximum IOPS threshold on the application volume group to balance multiple application I/O workloads. The IOPS value is set as a combined threshold for all the volumes in the application volume group.

You can construct multiple such application volume groups, bringing together volumes that have similar I/O load characteristics. For example, the I/O load characteristic of redo log volumes of a database application will differ from that of the application's archive volumes and will therefore need different IOPS thresholds. In such scenarios, create separate application volume groups and set respective IOPS thresholds. A volume cannot be shared between multiple application volume groups for setting maximum IOPS limits.

In clustered environments, you can create an application volume group and set its threshold from any node in the cluster. The application volume group is visible on all nodes and the same threshold value is propagated to all nodes in the cluster. The threshold, however, applies to each node independently.

The vxvolgrp command can be used to manage the application volume group and its settings.

See the vxvolgrp(1M) manual page.

The vxstat command provides a detailed view of IOPS statistics on each application volume group.

See the vxstat(1M) manual page.