Setting priority for WWNs: many-to-many connections

If many-to-many connection is established between HBAs and ports, you need to define the priority of WWNs, measure the traffic between the HBAs and the ports that the HBAs are connected to, and analyze the traffic data.

The HBAs are divided into two types: prioritized WWNs and non-prioritized WWNs. Specify an HBA on which high-priority processing is performed as a prioritized WWN. Specify an HBA on which lower-priority processing is performed as a non-prioritized WWN.

You cannot change the priority of a WWN that is contained in an SPM group. For details on how to change the attribute of a WWN contained in an SPM group, see Switching priority of an SPM group.

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 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.

In the upper-left tree, double-click a port.

Double-click Monitor, which is displayed below the specified port.

Check to see if all WWNs of the host bus adapters to be controlled by using Server Priority Manager appear below Monitor.

If some of the WWNs are missing, use the procedure in Monitoring all port-HBA traffic: many-to-many connections to move all WWNs to below Monitor.

Click Monitor to display the information of the host bus adapters that are monitored in the list on the right of the tree.

Right-click a host bus adapter (WWN) in the list, and in the pop-up menu select Non-Prio ->> Prio.

The Attribute column of the selected WWN in the list displays Prio. If you want to specify more than one prioritized WWN, repeat this operation.

Right-click a host bus adapter (WWN) in the list, and in the pop-up menu select Prio ->> Non-Prio.

The Attribute column of the selected WWN in the list displays Non-Prio. If you want to specify more than one non-prioritized WWN, repeat this operation.

You cannot change the priority of a WWN which is contained in an SPM group. For details on how to change the attribute of a WWN contained in an SPM group, see Switching priority of an SPM group.

You must set upper limit values for the Non-prio. specified ports. For details, see Setting upper-limit values for non-prioritized WWNs: many-to-many connections.

Repeat steps 6 to 11 for ports (except for the port selected in step 6).

If one host bus adapter is connected to multiple ports and you specify the priority of the host bus adapter for one port, the specified priority will be also applied to the host bus adapter settings for other connected ports automatically.

In the Server Priority Manager main window, click Apply to apply the settings to the storage system.

For instructions on measuring traffic (that is, I/O rates and transfer rates), see Starting monitoring.