Administrator Guide

4. Click OK.
Performing Threshold Queries
Threshold queries allow you to query historical data based on threshold criteria.
For example, if a Storage Center experiences a spike of I/O usage, you can create a threshold query to discover the threshold criteria that
can detect I/O usage spikes. When you find the correct threshold criteria, you can use create a threshold definition to monitor I/O usage
on the Storage Center in the future.
View Saved Queries
Saved threshold queries are displayed in the Queries pane.
About this task
Public queries are accessible to all of the Unisphere Central users.Private queries are accessible only to the user that created the query.
Steps
1. If a Storage Center is selected from the drop-down list, click (Home) in the left navigation pane of Unisphere Central.
2.
From the MONITORING menu, click Thresholds.
The Thresholds view is displayed.
3. Click the Queries tab.
The public and private queries are displayed in the Queries area.
4. In the Queries area, select the query to view.
Information about the query is displayed to the right of the Queries area.
Create a Threshold Query
Create a threshold query to test threshold definition settings against historical data. New queries can be run immediately or saved for
future use.
Steps
1.
If a Storage Center is selected from the drop-down list, click (Home) in the left navigation pane of Unisphere Central.
2. From the MONITORING menu, click Thresholds.
The Thresholds view is displayed.
3. Click the Queries tab.
4. Perform the following steps to create a query filter:
a) Click (Create Query Filter).
The Create Query Filter dialog box opens.
b) Type a name for the query in the Name field.
c) (Optional) To make the query available to other Unisphere Central users, select the Public checkbox.
d) Select whether the query is for a specific Storage Centeror all Storage Centers.
• To select a specific Storage Center for the query, select a Storage Center from the Storage Center drop-down menu.
• To select all of the Storage Centers for the query, select the All Storage Centers checkbox.
e) Select type of query to create from the from the Type drop-down menu.
f) Select the type of storage object to query from the Alert Object Type drop-down menu.
g) Select the type of usage metric to query from the Alert Definition drop-down menu.
h) Select the period of time to query the data from the Start Time drop-down menu.
i) Type the threshold value that the usage metric must exceed in the Threshold Value field.
j) To specify the number of times that the usage metric must exceed the threshold value, type a value in the Occurrences field.
To only return results that occurred consecutively, select the Consecutive check box.
k) Click OK.
Storage Center Monitoring
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