HP XP7 Business Copy User Guide (TK913-96002)

• 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 server 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.

NOTE: This processing-suppression/performance-improvement level requires more time

to synchronize when you split a pair, which prolongs the time that the pair is in the process

of being Quick Split (“PSUS(SP)/PSUS” status) or Steady Split (“COPY(SP)/COPY” status).

If this is a problem, complete one of the following:

– Minimize the time that the pair status is “PAIR”.

– Use one of the other copy pace processing-suppression/performance-improvement

levels.

For more information about the methods you can use to split pairs, see “Pair splitting

methods” (page 46).