HP XP P9500 Storage - Manual (Page 14)

Figure 3 Graph 2: I/O rate displayed in Performance Monitor (the Detail check box is not
selected)
Figure 4 Graph 3: I/O rate displayed in Performance Monitor (the Detail check box is selected)
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Note on using Continuous Access Synchronous: Performance Control monitors write I/O
requests issued from initiator ports of your storage system.
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Note on using the remote copy functions: When the remote copy functions (Continuous Access
Synchronous, Continuous Access Synchronous Z, Continuous Access Journal, and Continuous
Access Journal Z) are used in your environment, Performance Control monitors write I/O
requests issued from initiator ports of your storage system.
If you give a priority attribute to the RCU target port, all I/Os received on the port will be
controlled as the threshold control and its performance data will be 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 give a non priority attribute to the RCU target port, I/O requests from the initiator port
will not be controlled as threshold control and I/Os on the port will not be limited. On the
other hand, I/O requests from a host will be controlled as the upper limit control and I/Os
on the port will be limited.
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Note on the statistics of 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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Note on the settings of Performance Control main window: The settings in the tab which you
use finally, the Port tab or the WWN tab, is valid as the current settings in the Performance
Control main window. All port settings in the invalid tab are invalid regardless of the resources
that are assigned to you. You can confirm the current status in Current Control Status which
is displayed on the upper right of the Performance Control main window.
14 Interoperability of Performance Monitor and other products