HP XP Racks - Manual (Page 148)

Description Item
for FC Z or FCSE) remains unchanged, and differential data is not copied to
the new S-VOL.
Default status: Disabled
• HOST I/O Performance: Suppresses copy operations at all times regardless
of the workload. This system option increases I/O performance.
Default status: Disabled
•
Copy Pace: Maximizes host server I/O performance by suppressing copy
processing only if the pair status is “DUPLEX” (for BC Z, FC Z, or FCSE) or
“PAIR” (for BC or FS).
Processing-suppression/performance-improvement levels:
◦
(FC Z and FCSE only) FC Slower Copy1: Reduces background copying to
one half, thereby improving host I/O response.
◦
(FC Z and FCSE only) FC Slower Copy2: Reduces background copying to
one quarter, thereby improving host I/O response.
◦
(FC Z and FCSE only) FC Ext. Slower Copy1: When the MP operating ratio
of the MP blade to which the source volume or target volume in a
Compatible FlashCopy relationship is allocated exceeds 65%, background
copy operations are suppressed, thereby improving the host I/O response.
◦
(FC Z and FCSE only) FC Ext. Slower Copy2: When the MP operating ratio
of the MP blade to which the source volume or target volume in a
Compatible FlashCopy relationship is allocated exceeds 50%, background
copy operations are suppressed, thereby improving the host I/O response.
◦
Copy Pace Ext. Slower1
Default status: Disabled
◦
Copy Pace Ext. Slower2
Default status: Disabled
◦
Copy Pace Ext. None
Default status: Disabled
The I/O performance of the host server is improved most effectively with Copy
Pace Ext. None, followed by Copy Pace Ext. Slower2, and then Copy Pace Ext.
Slower1.
For more information about the system options, see “System options that affect
performance” (page 34) .
Shows whether the option is currently enabled or disabled. Status
Click to enable the option. Enable button
Click to disable the option. Disable button
Confirm window
The following image shows this window of the Edit Local Replica Options wizard.
148 Business Copy Z GUI reference