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

Performance Control XP user guide 17
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
• Continuous Access. Performance Control XP monitors write I/O requests issued from initiator ports of
the array.
NOTE: When using continuous access functions, Performance Control XP 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.
Performance Control XP restrictions
The following restrictions apply to the Performance Control XP panes:
Graph 1: Actual I/O rate (measured every second)
Graph 2: I/O rate displayed in Performance Control XP (with Detail option)
Graph 3: I/O rate displayed in Performance Control XP (without Detail option)