Setting a threshold for the entire storage system: many-to-many connections

If threshold control is used, upper limit control is automatically disabled when traffic between production servers and the storage system is reduced to a specified level. For details, see Server Priority Manager workflow: many-to-many connections.

If many-to-many connections are established between host bus adapters and storage system ports, you can set one threshold value for the entire storage system. In this environment, you cannot set individual threshold values for each prioritized WWN.

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 the All Thresholds check box.

Select IOPS or MB/s from the All Thresholds list, and do one of the following:

To specify the threshold value by using the I/O rate, select IOPS from the list below the check box.

To specify the threshold value by using the transfer rate, select MB/s from the list below the check box.

Even if the types of rates differ between the upper limit values and the threshold value, the threshold control is effective for all non-prioritized WWNs.

Enter the threshold in the text box of All Thresholds.

If you enter zero (0) in a cell to disable the upper limit, the cell displays a hyphen (-) and the threshold for the prioritized port becomes ineffective. If the thresholds of all prioritized ports are ineffective, threshold control will not be performed but upper limit control will be performed.

Click Apply to apply the settings to the storage system.