HP XP7 Storage - Manual (Page 56)

Setting a threshold: one-to-one connections
When one-to-one connections are established between HBAs and ports, you can set a threshold
value for each prioritized port or one threshold value for the entire storage system. When traffic
between high-priority servers and the ports or storage system falls below the specified threshold
level, upper limit control is disabled to allow higher performance on non-prioritized ports during
periods of low activity on prioritized ports. For details about threshold values, see
“Threshold
control” (page 45) .
Prerequisites
•
Required role: Storage Administrator (System Resource Management)
•
You must enable the Remote Web Console secondary window. For details, see the HP XP7
Remote Web Console User Guide.
1. Display the Remote Web Console main window.
2. Click Reports > Performance Monitor > Performance Control to open the Performance Control
window.
3. Click to change to Modify mode.
4. In the Performance Control window, click Performance Control. The Performance Control main
window appears.
5. Select the Port tab.
6. To set a threshold value for each prioritized port, select the type of rates for the threshold value
from the list in the upper left 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.
If you want to set one threshold value for the entire storage system, this step is unnecessary.
7. 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 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 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 goes below the threshold at all prioritized ports, threshold control
works in the entire storage system and the upper limits of the non-prioritized ports are
disabled.
•
To set one threshold to the entire storage system, select the All Thresholds check box.
Next, select IOPS or MB/s from the list of right side 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 non-prioritized ports.
8. Click Apply to apply the settings to the storage system.
56 Performance Control operations