Setting Upper-Limit Values For Non-Prioritized Wwns: Many-To-Many Connections - HPE XP7 User Manual

The following two types of traffic are shown. The traffic has attributes including the average
and maximum values.
Traffic between the host bus adapter and the selected port (shown in Per Port)
Sum of the traffic between the host bus adapter and all ports connected to the host bus
adapter (shown in WWN Total)
The traffic statistics only about the host bus 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 bus adapters registered on each PFC group is displayed. For details
on PFC groups, see
8. 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
connections" (page
Related topics
"Performance Control workflow: many-to-many connections" (page 119)
"Add New Monitored WWNs wizard" (page 189)
"Performance Control window" (page 227)
"WWN tab of the Performance Control main window" (page 230)

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 is 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:
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 bus adapter that is contained in a PFC
group. The upper limit value of a host bus adapter in a PFC group is defined by the PFC group
settings. For details, see
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
Prerequisites
Required role: Storage Administrator (System Resource Management)
You must enable the Remote Web Console secondary window. For details, see the XP7
Remote Web Console User Guide.
126 Performance Control operations
"Working with PFC groups" (page
119).
If an upper limit of the non-prioritized WWN is set to zero or nearly zero, I/O
"Setting an upper-limit value to HBAs in a PFC group" (page
132).
"Performance Control workflow: many-to-many
"Working with PFC groups" (page
135).
132).