Port tab of the Server Priority Manager main window

Current Control Status

Shows the current control status of the system.

• Port Control indicates the system is controlled by the upper limits and threshold specified on the Port tab.
• WWN Control indicates the system is controlled by the upper limits and threshold specified on the WWN tab.
• No Control indicates the system performance is not controlled by Server Priority Manager.

Tip: If WWN Control is displayed when the Port tab is active, click Apply to switch control so that Port Control is displayed.

Tip: To return the control status to No Control, specify Prio. for attributes of all ports and then click Apply.

Control List

Allows you to narrow ports appearing in the list:

• If All is selected, all ports appear in the list.
• If Prioritize is selected, only the prioritized ports appear in the list.
• If Non-Prioritize is selected, only the non-prioritized ports appear in the list.

If you change settings of a port, that port remains in the list regardless of the selection in the list.

Statistic type list

Allows you to change the type of performance statistics to be displayed in the list.

• If IOPS (I/Os per second) is selected, the list displays I/O rates for ports. The I/O rate indicates the number of I/Os per second.
• If MB/s (megabytes per second) is selected, the list displays the transfer rates for ports. The transfer rate indicates the size of data transferred via a port in one second.

Ports table

A list of ports, including the I/O rate or the transfer rate for each port. You can specify the port attributes, and the threshold and upper limit of the port traffic.

The measurement unit for the values in the list can be specified by the drop-down list above this table. The port traffic (I/O rate and transfer rate) is monitored by Performance Monitor. To specify the monitoring period, use the Monitoring Term area of Performance Monitor.

The table contains these columns:

• Port indicates ports on the storage system.
• Ave.[IOPS] indicates the average I/O rate or the average transfer rate for the specified period.
• Peak[IOPS] indicates the peak I/O rate or the peak transfer rate of the ports for the specified period. This value means the top of the Max. line in the detailed port-traffic graph drawn in the Monitor Performance window. For details, see Data collected by Performance Monitor.
• Attribute indicates the priority of each port. Prio indicates a prioritized port. Non-Prio indicates a non-prioritized port.
• Use the Threshold columns to specify the threshold for the I/O rate and the transfer rate for each prioritized port. Either the IOPS or MB/s column in the list is activated depending on the selection from the list above.

  Use the IOPS column to specify the threshold for I/O rates. Use the MB/s column to specify the threshold for transfer rates.

  To specify a threshold, double-click a cell to display the cursor in the cell. If you specify a value in either the IOPS or MB/s column, the other column is unavailable. You can specify thresholds for I/O rates and transfer rates all together for different prioritized ports.

  Even if you use the type of rate for the threshold different from that used for the upper limit values, the threshold control can work for all ports.

• Use the Upper columns to specify the upper limit on the I/O rate and the transfer rate for each non-prioritized port. Either the IOPS or MB/s column in the list is activated depending on the selection from the list above.

  Use the IOPS column to specify the upper limit for I/O rates. Use the MB/s column to specify the upper limit for transfer rates.

  To specify an upper limit, double-click a cell to display the cursor in the cell. If you specify a value in either of the IOPS or MB/s column, the other column is unavailable. You can specify upper limit values for I/O rates and transfer rates all together for different non-prioritized ports.

All Thresholds

If you select this check box and enter a threshold value in the text box, the threshold value is applied to the entire storage system.

To specify the threshold for the I/O rate, select IOPS from the list on the right of the text box. To specify the threshold for the transfer rate, select MB/s from the list. For example, if you specify 128 IOPS in All Thresholds, the upper limits on non-prioritized ports are disabled when the sum of I/O rates for all prioritized ports is below 128 IOPS.

Even if you use the different type of rate (IOPS or MB/s) for the threshold as that used for the upper limit values, the threshold control can work for all ports.

Delete ports if CHA is removed

If you check this check box, Server Priority Manager deletes, from SVP, the setting information of Server Priority Manager on ports in channel adapters that have been removed.

When a channel adapter is removed, the port and its settings are removed from the Server Priority Manager main window automatically, but they remain in SVP. This may cause the old setting for Server Priority Manager to be applied to a different channel adapter than the one newly-installed on the same location.

The Delete ports if CHA is removed check box is available only when the following Server Priority Manager settings on ports in a removed channel adapter remains on SVP:

• The setting of prioritized ports or non-prioritized ports.
• The setting of prioritized WWNs or non-prioritized WWNs.

Apply

Applies the settings in this window to the storage system.

Reset

Restores the last applied settings in the window. When you click this button, all changes displayed with the blue text in the window are canceled.

Initialize

Changes the settings in this window as explained below, and then applies the resulting settings to the storage system:

• All ports become prioritized ports.
• The threshold value for all ports becomes 0 (zero).
• The window will display a hyphen (-) instead of 0 (zero).
• If the All Thresholds check box is checked, the check mark disappears.

Close

Closes the Server Priority Manager main window.