Edit Local Replica Options window

Use this window to specify options that affect host server I/O performance. This is the first window of the Edit Local Replica Options wizard.

For full information, see the topic on system options that affect performance by clicking Show All Contents and then selecting In-System Replication to navigate to the desired software and information.

SI/TI System Options table

The following table shows the items in this table.

Item

Description

System Option

Displays the system options. The number next to each system option indicates the system option number.

Values:

  • Swap & Freeze (1): Use this option to suppress the storage system's update copy operations after a Quick Restore and the pair is in PAIR status (for SI or HTI). The S-VOL remains unchanged, and differential data is not copied to the new S-VOL.

Default status: Disabled

  • HOST I/O Performance (2): Suppresses copy operations at all times regardless of the workload. This system option increases I/O performance.

Default status: Disabled

  • Non-disruptive 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: Maximizes host server I/O performance by suppressing copy processing only if the pair status is PAIR (for SI or HTI).

Processing-suppression/performance-improvement levels:

  • Copy Pace Ext. Slower1 (20)

Default status: Disabled

  • Copy Pace Ext. Slower2 (21)

Default status: Disabled

  • Copy Pace Ext. None (22)

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.

  • Quick/Steady Split Multiplexing (ShadowImage) (24): Accelerates the 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) (25): Accelerates the resynchronization 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.

For more information about the system options, see the topic on setting system options by clicking Show All Contents and then selecting In-System Replication to navigate to the desired software and information.

Status

Shows whether the option is currently enabled or disabled.

Enable button

Click to enable the option.

Disable button

Click to disable the option.