Cautions and restrictions for Server Priority Manager
Real-time monitoring mode
Server Priority Manager cannot be started when Performance Monitor is in real-time mode. Before starting Server Priority Manager, ensure that Time Range in the Monitor Performance window is not set to Use Real Time.
Remote copy functions
When the remote copy functions (TrueCopy, Universal Replicator) are used in your environment, Server Priority Manager monitors I/O requests between the storage systems.
If you set the priority attribute to the storage system port at the secondary site, all I/Os received on the port are controlled as the threshold control, and its performance data is added to the total number of I/Os (or the transfer rate) of all prioritized ports. I/Os on the port will not be limited.
If you set the non-priority attribute to the storage system port at the secondary site, I/O requests from the storage system port at the primary site are not controlled by threshold control, and I/Os on the port will not be limited. On the other hand, I/O requests from a host are controlled by upper limit control, and I/Os on the port will be limited.
Statistics for storage system ports at the primary site
The I/O requests from the storage system ports at the primary site are not controlled by Server Priority Manager.
Settings on the Server Priority Manager main window
The Server Priority Manager main window has two tabs: the Port tab and the WWN tab. The settings on only one tab at a time can be applied to the storage system. If you make settings on both tabs, the settings cannot be applied at the same time. When you select Apply, the settings on the last tab on which you made settings are applied, and the settings on the other tab are discarded.
Using Command Control Interface
Server Priority Manager operations cannot be performed from the GUI and the CLI (HCS and CCI) at the same time. If you change some settings for Server Priority Manager from CCI, you cannot change those settings from the GUI. If you do, some settings might not appear. Before you change features that use Server Priority Manager, delete all Server Priority Manager settings from the currently used features.
Connecting one HBA to multiple ports
If one host bus adapter is connected to multiple ports and you specify an upper limit of the non-prioritized WWN for one port, the specified upper limit value will be applied to the host bus adapter settings for other connected ports automatically.
Setting the connection between host bus adapter and port
To make setting for connecting the host bus adapter's WWN and the port, use the WWN tab of the Server Priority Manager main window. Alternatively you can use the Monitored WWNs tab of the Performance Monitor main window. Note that the monitored WWN name displayed in Performance Monitor is displayed as the SPM name in Server Priority Manager.