HP StorageWorks Performance Control XP user guide (T1605-96007, October 2007)

22 Using Performance Control XP
• Threshold: In the Port tab, specifies the threshold for I/O and transfer rates for each prioritized port.
Use the IOPS column to specify the threshold for I/O rates. Use the MB/s column to specify the
threshold for transfer rates. To specify a threshold, double-click a cell to display the cursor in the cell.
• Upper: Specifies the upper limit on I/O and transfer rates for each non-prioritized port or WWN.
Use the IOPS column to specify the upper limit for I/O rates. Use the MB/s column (or 100KB/s
column for WWN) to specify the upper limit for transfer rates. To specify an upper limit,
double-click a cell to display the cursor in the cell.
NOTE: The Upper columns are not displayed in the WWN tab if a PFC group is selected in the
lower-left tree view.
Bottom section
• If you click the All Thresholds check box and enter a threshold value in the text box, the threshold value
is applied to the entire array. To specify the threshold for I/O rates, select IOPS from the list on the right
of the text box. To specify the threshold for transfer rates, select MB/s (or 100KB/s in the WWN tab)
from the list. For example, if you specify 128 IOPS in All Thresholds, the upper limits on non-prioritized
ports are disabled when the sum of I/O rates for all the prioritized ports is below 128 IOPS.
• The Delete ports if CHA is removed check box deletes settings on ports in channel adapters that have
been removed.
Buttons
• Apply: Applies settings in this pane to the array.
• Reset: Restores original settings in the pane.
• Initialize: Changes settings in this pane as explained below, and applies the resulting settings to the
array:
• All ports or WWNs become prioritized ports or WWNs.
• The threshold value for all ports in the Port tab becomes 0 (zero).
NOTE: The pane displays a hyphen (-) instead of 0 (zero).
• If you check the All Thresholds check box, the check mark disappears.
• Close: Closes the Performance Control pane.
Managing traffic between HBAs and ports
If one-to-one connections are established between host bus adapters (HBAs) and array ports, use the Port
tab in the Performance Control pane to measure and analyze traffic.
If many-to-many connections are established between host bus adapters (HBAs) and array ports, use the
WWN tab in the Performance Control pane to measure and analyze traffic.
Setting the priority of ports on arrays
If a one-to-one connection is established between HBAs and ports, you must measure traffic between
high-priority HBAs and prioritized ports and between low-priority HBAs and non-prioritized ports.
1. Start Performance Control XP (”Starting Performance Control XP” on page 19). The Performance Control
pane appears.
2. Click Port.
3. Select All from the list at the top right corner of the pane.
4. Right-click a high-priority port, and select Non-Prio. ->> Prioritized. If there is more than one
high-priority port, repeat this operation.
Prio. appears in the Attribute column.
5. Right-click a low-priority port, and select Prio. ->> Non-Prio. If there is more than one low-priority port,
repeat this operation.