HP XP Racks - Manual (Page 34)

3. In the Release Reserved Mainframe CTGs window, for Task Name, type a name for the task
and then click Apply.
The reserved CG is released.
System options that affect performance
The following system options affect performance, which you can enable and disable:
•
Swap & Freeze. Enable this system option to suppress copy operations (the S-VOLs to remain
unchanged) during pair restoration using Quick Restore. Differential data is not copied to the
new S-VOL.
•
HOST I/O Performance. Enable this system option to suppress copy operations regardless of
the workload and to maximize I/O performance.
NOTE: This system option increases the copy time, which slows copy operations.
•
Copy Threshold. (For BC/SS, BC Z, Compatible FlashCopy, FS, and Auto LUN) Enable this
system option to temporarily suppress copy operations when the XP7 storage system’s workload
is heavy and to maximize host I/O performance during peak periods.
NOTE: A service representative must enable this system option.
•
Copy Pace. Enable this system option to determine the rate at which the XP7 storage system
copies data, to suppress copy processing, and to maximize host I/O performance.
Use one of the following processing-suppression/performance-improvement levels:
◦ (FC Z and FCSE only) FC Slower Copy1
◦ (FC Z and FCSE only) FC Slower Copy2
◦ Copy Pace Ext. Slower1. This is the third most effective
processing-suppression/performance-improvement level.
◦ Copy Pace Ext. Slower2. This is the second most effective
processing-suppression/performance-improvement level.
◦ Copy Pace Ext. None. This is the most effective
processing-suppression/performance-improvement level. This level stops copy processing.
34 Configuring Business Copy Z