HP XP Array Manager Software - Manual (Page 42)

• To limit the I/O rate of the non-prioritized WWN, double-click the desired cell in the IOPS
column in Upper. Next, enter the upper-limit value in the cell.
• To limit the transfer rate of the non-prioritized WWNs, 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 the 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 HBA. The upper-limit value that you entered is displayed in blue or specify upper-limit
values by using the I/O rate for some HBAs or specify the values for the other HBAs using the
transfer rate.
NOTE:
• You cannot specify or change the upper-limit value of an HBA which is contained in a Per-
formance Control group. The upper-limit value of such an HBA is defined by the Performance
Control group settings. For details on how to specify an upper-limit value for a Performance
Control group, see “
Setting an Upper-Limit Value to HBAs in a Performance Control
Group ” on page 46.
• If one HBA is connected to multiple ports and you specify an upper-limit value of the HBA
for one port, the specified upper-limit value will automatically be applied to the HBA settings
for other connected ports.
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 in the WWN Tab
If a 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 ” on page 12 and “ If Many-to-Many Connections Link HBAs and Ports ” on page 28.
If many-to-many connections are established between HBAs 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 XP Performance Control (see “ Starting XP Performance Control ” on page 32).
The Performance Control window is displayed.
2. Click the WWN tab ( Figure 4 on page 20).
3. Select the All Thresholds check box.
4. Select IOPS or MB/s from the All Thresholds list, and do one of the following:
• To specify the threshold value by using the I/O rate, select IOPS from the list below the check
box.
• To specify the threshold value by using the transfer rate, select MB/s from the list below the
check box.
5. Enter the threshold in the text box to the immediate right of the All Thresholds check box.
6. Click the Apply button.
The settings in the window are applied to the storage system.
XP Performance Control Operations 42