HP XP7 Storage - Manual (Page 52)

If you set the non-priority attribute to an RCU target port, I/O requests from the initiator port
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.
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Statistics for initiator/external ports
The initiator ports and external ports of your storage system are not controlled by Performance
Control. Although you can set Prioritize or Non-Prioritize to initiator ports and external ports
by using Performance Control, the initiator ports and the external ports become the prioritized
ports that are not under threshold control, regardless of whether the setting of the ports are
Prioritize or Non-Prioritize. If the port attributes are changed from Initiator/External into
Target/RCU Target, the settings by Performance Control take effect instantly and the ports are
subject to threshold or upper limit control.
The statistics of the Monitor Performance window are sum total of statistics on Target/RCU
Target ports that are controlled by Performance Control. The statistics does not include the
statistics of Initiator/External ports. Because the statistics of Initiator/External ports and
Target/RCU Target ports are based on different calculation methods, it is impossible to sum
up the statistics of Initiator/External ports and Target/RCU Target ports.
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Settings on the Performance Control main window
The Performance Control 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.
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Using RAID Manager
Do not perform Performance Control operations from RAID Manager and the GUI at the same
time. If you change some settings for Performance Control from RAID Manager, you cannot
change those settings from the GUI. If you do, some settings might not appear. Before you
change features that use Performance Control, delete all Performance Control settings from
the currently used features.
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Connecting one HBA to multiple ports
If one host 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
adapter settings for other connected ports automatically.
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Setting the connection between host adapter and port
To make setting for connecting the host adapter's WWN and the port, use the WWN tab of
the Performance Control 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 Perf Ctl name in Performance Control.
Implementing Performance Control: one-to-one connections
This section describes and provides instructions for implementing Performance Control for one-to-one
connections.
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“Performance Control workflow: one-to-one connections” (page 53)
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“Setting priority for ports: one-to-one connections” (page 53)
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“Analyzing traffic statistics: one-to-one connections” (page 54)
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“Setting upper-limit values for non-prioritized ports: one-to-one connections” (page 54)
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“Setting a threshold: one-to-one connections” (page 56)
52 Performance Control operations