HP XP7 Storage - Manual (Page 53)

Performance Control workflow: one-to-one connections
The workflow for Performance Control depends on the connection between the host adapters and
the ports. When one-to-one connections are established between host adapters and ports, you can
manage the priority of I/O operations on each port. You can specify upper limit values on the
non-prioritized ports. You can also specify threshold values on the prioritized ports or apply one
threshold value to the entire storage system. When traffic drops below this threshold, the upper
limits on non-prioritized ports are disabled to allow higher performance on non-prioritized ports
during periods of low system activity.
The Port tab of the Performance Control main window is used to manage Performance Control
operations for one-to-one connections.
Workflow for one-to-one connections:
1.
If desired, assign names to the WWNs for ease of identification. For details, see “Changing
the PFC name of a host adapter” (page 64) .
2. Set the priority (Prio or Non-Prio) for the ports of the storage system. For details, see “Setting
priority for ports: one-to-one connections” (page 53) .
3. Monitor the I/O traffic at the prioritized and non-prioritized ports to collect data and statistics
for analysis. For details, see
“Monitoring WWNs” (page 14) .
4. Analyze the traffic statistics that you have collected to determine the appropriate upper limits
to set for the non-prioritized ports. For details, see
“Analyzing traffic statistics: one-to-one
connections” (page 54) .
5. Set upper limits for I/O traffic at the non-prioritized ports to prevent these ports from affecting
the prioritized ports. For details, see
“Setting upper-limit values for non-prioritized ports:
one-to-one connections” (page 54) .
6. Monitor the I/O traffic at the ports again to check the results of applying the upper limits to
the non-prioritized ports, and adjust the upper-limit values as needed.
7. If desired, apply a threshold to the ports or to the entire storage system to allow higher
performance at non-prioritized ports when activity on the prioritized ports or storage system
is low. For details, see
“Setting a threshold: one-to-one connections” (page 56) .
Setting priority for ports: one-to-one connections
Prioritized ports are ports on which processing has high priority, and non-prioritized ports are
ports on which processing has lower priority. Specify a port that connects to a high-priority host
adapter as a prioritized port. Specify a port that connects to a lower-priority host adapter as a
non-prioritized port.
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. Select All from the list at the top right corner of the window.
7. Right-click a high-priority port, and in the pop-up menu select Non-Prio ->> Prio. The Attribute
column displays Prio. Repeat this action for each high-priority port.
Implementing Performance Control: one-to-one connections 53