HP XP RAID Manager Software - Manual (Page 22)

Figure 8 Graph 3: I/O rate displayed in Performance Monitor (the Detail check box is selected)
NOTE:
•
Continuous Access Synchronous: Performance Control monitors write I/O requests issued from
initiator ports of your storage system.
•
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.
•
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.
•
Settings of Performance Control main window: The settings in the Port tab or the WWN tab
are 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 appears in the upper right of the Performance
Control main window.
NOTE:
•
Settings for Performance Control from RAID Manager: You cannot operate Performance Control
from RAID Manager and Remote Web Console simultaneously.If you change some settings
for Performance Control from RAID Manager, you cannot change those settings from Remote
Web Console. 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.
22 Interoperability of Performance Monitor and other products