HP XP P9000 for Compatible High Perf FICON Connectivity Software - Manual (Page 56)

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
“Threshold
control” (page 9) and “If one-to-one connections link HBAs and ports” (page 47) .
If one-to-one connections are established between HBAs and ports, you can set the threshold value
by the following two ways:
•
Set a threshold value for each prioritized port
•
Set one threshold value for the entire storage system
The procedures for these operations are explained below.
1.
Click Reports > Performance Monitor> Performance Control to open the Performance Control
window.
2. Click to change to Modify mode.
3. In the Performance Control window, click Performance Control. The Performance Control main
window appears.
4. Select the Port tab.
5. To set a threshold value for each prioritized port, select the type of rates for the threshold value
from the list at the upper lest corner of the list.
•
To use the I/O rates for the threshold value, select IOPS.
•
To use the transfer rates for the threshold value, select MB/s.
NOTE: If you want to set one threshold value for the entire storage system, this step is
unnecessary.
6. Do one of the following:
•
To set a threshold to 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 IOPS or MB/s
column is activated depending on the rate selected at step 5 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.
CAUTION: If you enter zero (0) in a cell to disable the upper limit, the cell displays a
hyphen (-) and the threshold for the prioritized port becomes ineffective. If the thresholds
of all the prioritized ports are ineffective, threshold control will not be performed but upper
limit control will be performed. If you set thresholds for multiple prioritized ports and the
I/O rate or transfer rate becomes below the threshold at one of the prioritized port,
threshold control works in the entire storage system and the upper limits of the
non-prioritized ports are disabled. The following table shows the relationship between
the thresholds and the upper limits.
56 Performance Control operations