Dashboard window

Performance information is displayed only for users who have one of the following roles:

• Storage
• Monitor
• Resource
• RemoteCopy

If volume migration is running, a value including the number of I/Os issued by the volume migration is displayed in the performance information.

When a storage node has a high load, the chart of performance information might not be fully displayed, but it will be fully displayed after a while.

Total Efficiency indicates the used capacity reduction effect achieved by the volume creation function and snapshot function.

This is an average ratio, where the ratio of usedCapacity (used capacity of the storage pool) to totalVolumeCapacity (total capacity of created volumes)* is calculated for each storage controller, and then weighted according to the total capacity of the created volumes for each storage controller. The larger the total capacity of created volumes of a storage controller is, the more the capacity reduction effect of that storage controller are reflected to the Total Efficiency value.

* You can get the value of used capacity of the storage pool (usedCapacity) and the value of total capacity of created volumes (totalVolumeCapacity) by obtaining information about the storage pool. You can verify the used capacity of the storage pool (usedCapacity) in USED of USED/TOTAL in Summary on the Storage Pool window, and the total capacity of created volumes (totalVolumeCapacity) in TOTAL CAPACITY of VOLUME CAPACITY INFORMATION on the Storage Pool window.

When the ratio is larger than 99999.99:1, it is displayed as ">99999.99:1".

When snapshot volumes are used, the used storage pool capacity can be reduced by storing only the differential data between P-VOL and S-VOL. Therefore, the value of totalEfficiency is larger than that when snapshot volumes are not included, even if the total capacity of created volumes is the same.

When storage pool expansion processing is being performed and KARS16017-I, KARS16020-I, KARS16022-I, or KARS16081-I is output, the value of totalEfficiency might become larger even when snapshot operations are not being performed. Note that snapshot operations refer to preparation (for obtaining snapshots) and obtaining, deleting, and restoring snapshots.

Volumes whose type is “ExternalMigrationOrigin” are not included in the number of volumes.

The value of Data Reduction is the ratio of the data capacity before and after data reduction. For details about the ratio, see Estimated (approximate) time required for deleting volumes with data reduction enabled in the VSP One SDS Block System Administrator Operation Guide.