HP StorageWorks XP24000/XP20000 Performance Control User Guide (T5214-96087, September 2010)

4. Do one of the following:
• To specify a threshold for each prioritized port, locate the desired prioritized port, which is
indicated by Prio. in the Attribute column. Next, double-click the cell in the IOPS or MB/s
column in Threshold, and then enter the threshold value. In the list, either of the IOPS or the
MB/s column is activated depending on the rate selected at step 3 above. Repeat this operation
to set the thresholds for all the prioritized ports. You can use different types of rates (IOPS or
MB/s) for thresholds of different prioritized ports.
Table 2 Relationship between the thresholds of the prioritized port and the upper limits of the
non-prioritized port
Zero Is Set to the up-
per-limit of the Non-
prioritized Port
A Number Other Then Zero Is Set to the upper-
limit Limit of the Non-prioritized Port
Threshold Set-
tings
The threshold control of
the prioritized port is not
executed.
When thresholds are set for multiple prioritized ports,
depending on the transfer rate, for following controls
are executed.
• If I/O rate or transfer rate exceeds the threshold
in any prioritized port, upper limits of all the non-
prioritized ports take effect.
• If I/O rate or transfer rate goes below the threshold
in any prioritized port, upper limits of all the non-
prioritized ports do not take effect.
Threshold is set
for the priorit-
ized port
The specified upper limit always takes effect.
Threshold is not
set for the priorit-
ized port
• To set one threshold to the entire storage system, select the All Thresholds check box. Next,
select IOPS or MB/s from the list in All Thresholds and enter the threshold value in the text
box. Even if the types of rates for upper-limit values and the threshold are different, the threshold
control can work for all the non-prioritized ports.
5. Click Apply.
The settings in the window are applied to the storage system.
WWN Tab Operations
If many-to-many connections are established between HBAs and storage system ports, you use the
WWN tab in the Performance Control window to do the following:
• Monitoring All Traffic between HBAs and Ports, page 37
• Analyzing Traffic Statistics in the WWN Tab, page 39
• Setting Priority for HBAs, page 40
• Setting Upper-Limit Values for Non-Prioritized WWNs, page 41
• Setting a Threshold in the WWN Tab, page 42
• Changing the Performance Control Name of an HBA, page 43
• Replacing a Host Bus Adapter, page 43
• Grouping HBAs, page 44
If many-to-many connections are established between HBAs and ports, you should specify the priority
of I/O operations on each HBA. You can specify the upper-limit values on the non-prioritized WWNs.
If necessary, you can specify one threshold value for the entire storage system. When many-to-many
XP Performance Control Operations36