Hitachi MK-96RD617-08 - Manual (Page 36)

2-20 About Performance Manager Options
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User’s Guide
• Note on using the remote copy functions: When the remote copy
functions (TrueCopy, TrueCopy for IBM z/OS, Universal Replicator, and
Universal Replicator for IBM z/OS) are used in your environment, Server
Priority Manager monitors write I/O requests issued from initiator ports of
your storage system.
If you specify an RCU target port as a prioritized port, I/O requests from
the initiator port will not be a target of threshold control.
If you specify an RCU target port as a non-prioritized port, I/O requests
from the initiator port will not be a target of upper limit control.
• Note on the statistics of Initiator/External ports: The initiator ports
and external ports of your storage subsystem are not controlled by Server
Priority Manager. Although you can set Prioritize or Non-Prioritize to
initiator ports and external ports by using Server Priority Manager, 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 Server Priority
Manager take effect instantly and the ports are subject to threshold or
upper limit control.
The statistics of All Prio. and All Non-Prio. that is indicated in the Port-
LUN tab of Performance Management windows are sum total of
statistics on Target/RCU Target ports that are controlled by Server Priority
Manager. The statistics of All Prio. and All Non-Prio. 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.