HP XP7 Storage - Manual (Page 62)

The following two types of traffic are shown. The traffic has attributes including the average
and maximum values.
•
Traffic between the host adapter and the selected port (shown in Per Port)
•
Sum of the traffic between the host adapter and all ports connected to the host adapter
(shown in WWN Total)
The traffic statistics only about the host adapters below Monitor appear in the list.
The WWN Total traffic statistics will also be displayed in the list when you click an icon in
the lower left tree. If you click the Storage System folder in the lower left tree, the sum of the
traffic of the host adapters registered on each PFC group is displayed. For details on PFC
groups, see
“Working with PFC groups” (page 66) .
9. Analyze the information in the list and then determine upper limit values that should be applied
to non-prioritized WWNs. If necessary, determine threshold values that should be applied to
prioritized WWNs. For details, see
“Performance Control workflow: many-to-many connections”
(page 57) .
Related topics
•
“Performance Control workflow: many-to-many connections” (page 57)
•
“Add New Monitored WWNs wizard” (page 172)
•
“Performance Control window” (page 208)
•
“WWN tab of the Performance Control main window” (page 211)
Setting upper-limit values for non-prioritized WWNs: many-to-many connections
After you analyze traffic statistics about prioritized WWNs and non-prioritized WWNs, you must
set upper limit values to I/O rates or transfer rates for non-prioritized WWNs. Upper limit values
for I/O rates are used to suppress the number of I/Os from the low priority host servers and thus
provide better performance for high-priority host servers. Upper limit values for transfer rates are
used to suppress the amount of data that should be transferred between the storage system and
the low priority ports, thus providing better performance for high-priority host servers.
When you set an upper limit for the first time, it is recommended that the upper limit be
approximately 90 percent of the peak traffic.
CAUTION: If an upper limit of the non-prioritized WWN is set to zero or nearly zero, I/O
performance might be lowered. If I/O performance is lowered, the host cannot be connected to
the storage system in some cases.
NOTE: You cannot set the upper-limit value of a host adapter that is contained in a PFC group.
The upper limit value of a host adapter in a PFC group is defined by the PFC group settings. For
details, see
“Setting an upper-limit value to HBAs in a PFC group” (page 69) .
TIP: To set the same upper limit value to more than one non-prioritized WWN, use a PFC group.
For details on PFC groups, see “Working with PFC groups” (page 66) .
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.
62 Performance Control operations