Dell Storage Manager 2020 R1 Administrator's Guide

Recommendations Based on Volume Latency

If the recommendation was triggered by a threshold definition that monitors volume latency, the Recommend Storage Center dialog box displays a recommendation to move a specific volume to a specific Storage Center.

If Dell Storage Manager identified a possible reason for the increased volume latency, the reason is displayed in the Recommend Reason field. Once the Recommend Reason is calculated, it is not updated for a 24-hour period. If you view the recommendation after 24 hours have elapsed, the reason is recalculated. If Dell Storage Manager is unable to determine a reason, no reason is provided.

The following reasons can be displayed:

• CPU- Indicates that CPU usage for the controller that hosts the volume is high.
• IO Count: Indicates that IO for the Storage Center that hosts the volume is high.
• Disk Latency: The disks that provide storage for the volume are experiencing high latency.
• Tier 1 Space: Tier 1 storage space is full or nearly full for the Storage Center that hosts the volume.

The Convert to a Live Volume to move to recommended Storage Center or Live Migrate the volume to the recommended Storage Center link opens a dialog box that allows you to move the volume automatically to the recommended Storage Center by converting it to a Live Volume or creating a Live Migration.