Beginning with QSM 4.2, XEVO 3.2 and KSM 1.1, the Performance page displays historical performance data for the volumes and disks in the selected storage system. Use this page to compare resource activity and identify changes in throughput, IOPS, and latency over time.

Go to Monitor > Performance to view performance data. The available charts and controls vary depending on whether Volume or Disk is selected.

Switch Between Volume and Disk Performance #

Click Volume/Disk, or either arrow beside the resource type to switch between volume and disk performance data.

The Volume view displays throughput, IOPS, and latency data for the selected volumes. The Disk view displays throughput and latency data for the selected disks.

Select Volumes or Disks to Monitor #

The left pane organizes resources into Selected Volumes/Disks and Available Volumes/Disks.

Click the – icon next to a selected resource to remove it from the list. The resource moves to the available list and is no longer included in the performance charts.

Click the + icon beside an available resource to move it to the selected list. The resource is then available for display in the performance charts.

The counter beside Selected Volumes or Selected Disks shows the number of selected resources and the maximum number that can be selected.

Show or Hide Performance Data #

Each selected volume or disk is assigned a color that corresponds to its data line in the charts.

Select the checkbox beside a resource to display its performance data. Clear the checkbox to hide its data without moving it back to the available list. This allows specific resources to be compared without changing the selected resource list.

Filter Volume Performance Data #

In the Volume view, select one of the following options to filter the displayed performance data:

• All: Displays the combined read and write activity.
• Read: Displays read activity only.
• Write: Displays write activity only.

The selected filter applies to the performance charts displayed on the page.

Select a Monitoring Period #

Use the time-range menu in the upper-right corner to select the period covered by the charts:

• Hour
• Day
• Week
• Month
• Year

Selecting a different period refreshes the charts with data from the corresponding time range.

Adjust the Chart Time Range #

Use the range slider below the charts to adjust the displayed time interval.

Drag either handle toward the center to narrow the time range and zoom in on a specific period. Drag the handles farther apart to widen the time range and zoom out. The timestamps beside the slider indicate the beginning and end of the displayed interval.

Performance Metrics #

The charts may display the following performance metrics:

• Throughput (MB/s): The amount of data transferred per second.
• IOPS: The number of input/output operations performed per second.
• Latency (ms): The time required to complete an input/output operation.

The Volume view displays all three metrics, while the Disk view displays throughput and latency.