Hitachi VSP G1000 User Manual page 282

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SIMF/FCv2/FCSE System Options table (VSP G1000, G1500, and VSP F1500)
The following table lists the items in this table on the Edit Local Replica
Options window.
System Option
282
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series
Item
Click to enable the selected option.
Click to disable the selected option.
Item
Displays the system options. The number next to each item is the
system option number.
Values:
• Swap & Freeze (1): Quick Restores and then saves the
current data. Used with the Quick Restore, inhibits the Update
Copy operation after performing Quick Restore, and the paired
S-VOL (T-VOL for FCv2 or FCSE) is not updated.
• Host I/O Performance (2): Use this option to give weight to
I/O response rather than the copy time. This option controls
copy operations and improves the host I/O response.
• FC Slower Copy1 (FCv2 or FCSE only) (3): Reduces the
multiplicity of background copy into half.
• FC Slower Copy 2 (FCv2 or FCSE only) (4): Reduces the
multiplicity of background copy into quarter.
• Nondisruptive Migration Data Consistency (16): Use this
option to keep the latest data in the migration source storage
system instead of distributing data in both the destination and
source storage systems during data migration.
• FC Ext. Slower Copy1 (17): Inhibits background copy and
improves host I/O response when the operating ratio of the MP
blade (FCv2 or FCSE S-VOL or T-VOL is allocated) exceeds
65%.
• FC Ext. Slower Copy2 (18): Inhibits background copy and
improves host I/O response when the operating ratio of the MP
blade (FCv2 or FCSE S-VOL or T-VOL is allocated) exceeds
50%.
• Copy Pace Ext. Slower1 (20), Copy Pace Ext. Slower2
(21), Copy Pace Ext. None (22): Reducing the copy volume
in the "DUPLEX" status curbs the influence to the I/O
performance of the host server. This item is available to all
pairs in "DUPLEX" status. The I/O performance of the host
server is improved in order of Copy Pace Ext. Slower1, Copy
Pace Ext. Slower2, and Copy Pace Ext. None.
• Quick/Steady Split Multiplexing (ShadowImage/
ShadowImage for Mainframe) (24): Accelerates
ShadowImage for Mainframe pair split. The multiplicity (the
number of jobs for which copy processing can be executed
concurrently) of copy processing for each pair is changed from
1 to 24.
• Reverse Copy Multiplexing (ShadowImage/
ShadowImage for Mainframe) (25): Accelerates
resynchronization (secondary to primary) of ShadowImage for
Mainframe pairs. The multiplicity (the number of jobs for which
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