Hitachi MP-96RD625-01 manual Displaying the Usage Monitor Graph

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 (e.g., 1E7 = 1⋅107 = 10,000,000; 2E8 = 2⋅108 = 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 Figure 9-1).

3.Select an appropriate radio button in Select Volume, following the instructions below:

–If you want to display I/O statistics for all LDEVs to be monitored in the storage system, select ALL Volumes.

–If you want to display I/O statistics for a specific journal group, select JNL Group, and then enter a journal group number (00-FF).

Note: If you specify an unused journal group, the graph is not displayed.

–If you want 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).

Note: 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, please refer to the Universal Volume Manager 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. Table 9-1 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.

9-4 Chapter 9 Usage Monitor Operations

Hitachi Universal Replicator for IBM /OS User’s Guide