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– To limit the transfer rate of the non-prioritized WWN, double-click the
desired cell in the MB/s column in Upper. Next, enter the upper limit
value in the cell.
In the list, either of the IOPS cells or MB/s cells are activated depending
on the rate you specified in step 3. You can specify the limit value by using
either of the I/O rate or transfer rate for each host bus adapter. The upper
limit value that you entered is displayed in blue. It is allowed that you
specify upper limit values by using the I/O rate for some host bus adapters
and specify them by using the transfer rate for the other host bus adapters.
Notes:
You cannot specify or change the upper limit value of a host bus adapter
which is contained in an SPM group. The upper limit value of such a
host bus adapter is defined by the SPM group settings. For details on
how to specify an upper limit value for an SPM group, see Setting an
Upper-Limit Value to HBAs in an SPM Group.
If one host bus adapter is connected to multiple ports and you specify an
upper limit value of the host bus adapter for one port, the specified
upper limit value will be applied to the host bus adapter settings for
other connected ports automatically.
7. Click Apply.
The settings in the window are applied to the storage system. The upper
limit value that you entered turns black.
Setting a Threshold
If threshold control is used, upper limit control is automatically disabled when
traffic between production servers and the storage system is reduced to a
specified level. For details, see Upper-Limit Control and If Many-to-Many
Connections Link HBAs and Ports.
If many-to-many connections are established between host bus adapters and
storage system ports, you can set one threshold value for the entire storage
system. In this environment, you cannot set individual threshold values for
each prioritized WWN.
To set a threshold value:
1. Start Server Priority Manager.
The Server Priority Manager window is displayed.
2. Select the WWN tab.
3. Select the All Thresholds check box.
Hitachi Universal Storage Platform V/VM Hitachi Performance Manager User's Guide
Server Priority Manager Operation
6-25
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