HP StorageWorks XP Remote Web Console Software - Manual (Page 159)

Starting and Stopping Usage Monitoring
Starting and stopping usage monitoring can be set using Performance Monitor. For detail about
starting and stopping usage monitoring, see Performance Monitor user’s guide.
Displaying the Usage Monitor Graph
When usage monitoring is running, the Usage Monitor window can display user-selected remote
copy I/O statistics in real time.
The usage monitor graph plots the user-selected I/O statistics (up to 65 data points) on an x-y
graph. The x-axis displays time. The y-axis displays the number of I/Os during the last sampling
period. The legend (right side of the graph) indicates the data being displayed. A value on the
y-axis varies according to the maximum value of the statistical data that is displaying. If the value
on the y-axis exceeds 10,000,000, the value is displayed in exponential notation (for example,
1E7 = 1×10
7
= 10,000,000; 2E8 = 2×10
8
= 200,000,000).
To display the usage monitor graph:
1. Make sure that usage monitoring is running (Monitoring Switch = Enable). The usage monitor
graph can only be displayed when monitoring is on.
2. Right-click the graph area of the Usage Monitor window, and select Display Item to open the
Display Item window (see
“Display Item Window” (page 160) ).
3. Select an appropriate radio button in Select Volume, following the instructions below:
•
To display I/O statistics for all LDEVs to be monitored in the storage system, select ALL
Volumes.
•
To display I/O statistics for a specific journal group, select JNL Group, and then enter a
journal group number (00-FF). If you specify an unused journal group, the graph is not
displayed.
•
To display I/O statistics for a specific LDEV, select Volume, and then specify the desired
LDEV by entering an LDKC number (00-01), a CU number (00-FE) and an LDEV number
(00-FF). If you specify the un-mounted volume, the graph is not displayed. Important:
When a graph displays, the LDKC number, the CU number and the LDEV number appear
above the graph. If the volume is an external volume, the symbol "#" appears after the
LDEV number. For detailed information about external volumes, see the XP External Storage
Software user’s guide.
4. In the Monitor Data box, select the I/O statistics data that you want to display on the graph.
You must select at least one box.
“Remote Copy I/O Statistics” (page 160) describes the I/O
statistics data.
5. Select Set to close the Display Item window. The Usage Monitor window now displays a graph
showing the selected I/O statistics data for the selected LU(s).
To enlarge the displayed graph, right-click the graph, and select the Large Size command. To
return the graph to normal size, right-click the graph, and select the Normal Size command.
Starting and Stopping Usage Monitoring 159