HP StorageWorks XP Performance Control user guide: HP XP12000 Disk Array, HP XP10000 Disk Array (T1605-96012, July 2009)

XP Performance Control user guide 13
minute), if you set an upper limit of 150 IO/s to port 1A, the highest data point in the line CL1-A in
Graph 2 and the line Ave.(1 min) in Graph 3 is around 150 IO/s. The lines Max (1 min.) and Min (1
min.) in Graph 3 might exceed the upper limit.
Figure 9 Graphs indicating changes in port traffic
• XP Continuous Access. XP Performance Control monitors write I/O requests issued from initiator ports
of the array.
NOTE: When using continuous access functions, XP Performance Control monitors write I/O
requests issued from initiator ports to the array.
If you specify an RCU target port as a prioritized port, I/O requests from the initiator port will be a
target of threshold control. If you specify an RCU target port as a non-prioritized port, I/O requests
from the initiator port will not be a target of upper limit control.
XP Performance Control restrictions
The following restrictions apply to the XP Performance Control panes:
Graph 1: Actual I/O rate (measured every second)
Graph 2: I/O rate displayed in XP Performance Control (with Detail option)
Graph 3: I/O rate displayed in XP Performance Control (without Detail option)