Hitachi VSP G400 User Guide

Item Description
• Mainframe: Select when you want to change system options that affect
SIz, FCv2, and FCSE performance.
Default: Open
SI/TI System Options table
The following table lists the items in this table on the Edit Local Replica
Options window.
Item
Description
System Option 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 in "PAIR" status 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.
• 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.
• Copy Pace Ext. Slower1 (20), Copy Pace Ext. Slower2
(21), Copy Pace Ext. None (22): Reducing the copy volume
in "PAIR" status curbs the influence to the I/O performance of
the host server. This item is available to all pairs in "PAIR"
status. The order of Copy Pace Ext. Slower1, Copy Pace Ext.
Slower2, and Copy Pace Ext. None determines the host server’s
I/O performance.
• Quick/Steady Split Multiplexing (ShadowImage/
ShadowImage for Mainframe) (24): Accelerates
ShadowImage 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
pairs. 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.
• Normal Resync Multiplexing (ShadowImage/
ShadowImage for Mainframe) (26): Accelerates
resynchronization (primary to secondary) of ShadowImage
pairs. 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.
• Disable the alert notification of shared memory space
warning (30): Inhibits the alert notification of SIM reference
code 603000.
Status
Shows whether the system option is currently enabled or disabled.
Thin Image GUI windows and wizards 281
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series

Hitachi VSP G400 Specifications

General

Brand	Hitachi
Model	VSP G400
Category	Storage
Language	English