Administrator Guide

c. Select the check box for each Storage Center controller that you want to monitor with the threshold definition, then
click Finish. The threshold definition is added and the Create Threshold Definition dialog box closes.
Create a Threshold Definition to Monitor the Percentage of Used Storage
for a Storage Center
When the Storage Center storage usage percentage exceeds the value set for the error threshold, Storage Manager triggers a
threshold alert with a volume movement recommendation.
Steps
1. Click the Threshold Alerts view.
2. Click the Definitions tab.
3. Click Create Threshold Definition. The Create Threshold Definition dialog box appears.
4. In the Name field, type a name for the threshold definition.
5. Configure the threshold definition to monitor Storage Center storage usage.
a. From the Type drop-down menu, select Storage.
b. From the Alert Object Type drop-down menu, select Storage Center.
c. From the Alert Definition drop-down menu, select Percent Used.
6. (Optional) Select the All Objects check box to apply the threshold definition to all Storage Centers.
7. Configure the storage usage percentage that must be exceeded to trigger a threshold alert with a volume movement
recommendation.
a. In the Error Setting field, type the storage usage percentage that must be exceeded.
b. Next to the Error Setting field, in the Iterations before email field, type the number of times the threshold must be
exceeded to trigger the alert.
8. Select the Recommend Storage Center check box.
9. Configure the other options as needed. These options are described in the online help.
10. When you are finished, click OK.
● If you selected the All Objects check box, the threshold definition is created and the Create Threshold Definition
dialog box closes.
● If you did not select the All Objects check box, the Add Objects dialog box appears.
11. Select the check box for each Storage Center that you want to monitor with the threshold definition, then click Finish. The
Create Threshold Definition dialog box closes.
Moving a Volume Based on a Recommendation
If the volume movement recommendation was triggered by a threshold definition that monitors volume latency, automatically
move the volume by creating a Live Volume or Live Migration. If the recommendation was triggered by a threshold definition
that monitors Storage Center front-end IO, Storage Center controller CPU usage, or the percentage of storage used for a
Storage Center, move the volume(s) manually.
Steps
1. Click the Threshold Alerts view.
2. Click the Alerts tab.
3. In the Current Threshold Alerts pane, locate the threshold alert that contains the volume movement recommendation.
Alerts that contain recommendations display Yes in the Recommend column.
4. Right-click the threshold alert, then select Recommend Storage Center. The Recommend Storage Center dialog box
opens.
● If the recommendation was triggered by a threshold definition that monitors volume latency, the dialog box displays
a Storage Center recommendation and allows you to move the volume by creating a Live Volume or Live Migration.
If Storage Manager identified a possible reason for the increased volume latency, the reason is displayed in the
Recommend Reason field
● If the recommendation was triggered by a threshold definition that monitors Storage Center front-end IO, Storage
Center controller CPU usage, or the percentage of storage used for a Storage Center, the dialog box displays a
recommended Storage Center without suggesting specific volumes to move.
Threshold Alerts
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