Analyzing traffic statistics: many-to-many connections

The traffic statistics indicate the number of I/Os via ports from HBAs and the amount of data that has been transferred between ports and HBAs. You must analyze the traffic statistics to determine the upper limit values that should be applied to I/O rates or transfer rates for low-priority HBAs.

The following procedure uses the Server Priority Manager main window to analyze traffic statistics. You can also use the Performance Monitor window to analyze traffic statistics and display a line graph that shows the changes in traffic.

Prerequisites

Required role: Storage Administrator (System Resource Management)

The Device Manager - Storage Navigator secondary window must be enabled.

Procedure

Display the Performance Monitor window.

In Device Manager - Storage Navigator:

Select Analytics in Explorer.

Select Performance Monitor in the tree to open the Performance Monitor window.

In Hitachi Command Suite:

Select the Resources tab, and expand the Storage Systems tree.

Right-click the target storage system and then select Performance Monitor.

In the Performance Monitor window, click Server Priority Manager to open the Server Priority Manager window.

Click to change to Modify mode.

In the Server Priority Manager window, click Server Priority Manager. The Server Priority Manager main window appears.

Select the WWN tab.

Select All from the list at the top right corner of the window.

Do one of the following:

To analyze I/O rates, select IOPS from the list at the upper left corner.

To analyze transfer rates, select MB/s from the list at the upper left corner of the list.

Below the Storage System folder in the upper-left tree, click the icon of the port whose traffic statistics you want to collect.

The list displays traffic statistics (I/O rates or transfer rates) about the host bus adapters that connect to the selected port.

The following two types of traffic are shown. The traffic has attributes including the average and maximum values.

Traffic between the host bus adapter and the selected port (shown in Per Port)

Sum of the traffic between the host bus adapter and all ports connected to the host bus adapter (shown in WWN Total)

The traffic statistics only about the host bus adapters below Monitor appear in the list.

The WWN Total traffic statistics will also be displayed in the list when you click an icon in the lower left tree. If you click the Storage System folder in the lower left tree, the sum of the traffic of the host bus adapters registered on each SPM group is displayed. For details on SPM groups, see Working with SPM groups.

Analyze the information in the list and then determine upper limit values that should be applied to non-prioritized WWNs. If necessary, determine threshold values that should be applied to prioritized WWNs. For details, see Server Priority Manager workflow: many-to-many connections.