HP XP Racks - Manual (Page 31)

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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.
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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) .
Related topics
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“Pair splitting methods” (page 46) .
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“Enabling system options” (page 31) .
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“Types of pair resynchronization” (page 52) .
Enabling system options
You can enable and disable the system options that affect performance.
Workflow for setting up Business Copy 31