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188 Configuration: Premium Feature— Remote Replication
also specify whether to use a write consistency group option. A write
consistency group ensures that the secondary virtual disk receives write
requests in the sequence initiated by the RAID controller module of the
primary virtual disk. The secondary virtual disk can also be added to a write
consistency group.
To set the write mode for the remote replication:
1
In the
Set Write Mode (Create Remote Replication)
wizard, select either
the
Synchronous
or
Asynchronous
mode.
2
If you select asynchronous mode, select whether to use the
Add to write
consistency group
option.
3
Click
Next
.
The
Select Synchronization Settings (Create Remote Replication)
wizard
is displayed. Go to "Setting Synchronization Priority and Synchronization
Method" on page 188.
Setting Synchronization Priority and Synchronization Method
You can set the priority for allocating system resources to synchronizing the
remote replication.
• Higher synchronization priorities allocate more resources to the process
and might degrade I/O performance.
• Lower synchronization priorities allocate fewer resources to the process
and have less impact on normal I/O performance.
The initial synchronization priority and synchronization method you select
can be changed later. For more information about resynchronizing virtual
disks in a remote replication, go to "Resynchronizing Virtual Disks" on
page 196.
To set Synchronization Priority and Synchronization Method:
1
In the
Select Synchronization Settings (Create Remote Replication)
wizard, select the synchronization priority on the slide bar.
2
Select either
Manual
or
Automatic
resynchronization.
•
Automatic resynchronization
—Resynchronization starts immediately
after communication is restored between unsynchronized replicated
virtual disks.
book.book Page 188 Wednesday, June 8, 2011 5:01 PM