Administrator Guide

Table Of Contents
Requirement Description
Unisphere Central configuration The source and destination Storage Centers must be added to Unisphere
Central.
Storage Center communication The source and destination Storage Centers must be connected using Fibre
Channel or iSCSI, and each Storage Center must be defined on the other
Storage Center.
On the source Storage Center, the destination Storage Center must be
defined as a remote Storage Center.
On the destination Storage Center, the source Storage Center must be
defined as a remote Storage Center.
Replication bandwidth controls Replication Bandwidth Controls must be defined on the source Storage Center.
Server
The source and destination Storage Centers must be mapped to a server.
MPIO must be enabled on the destination server to prevent I/O interruption
during a Live Migration.
Live Migration Roles
Live Migrations have two roles: source and destination. These roles determine the active volume that is servicing I/O. The roles
can be swapped one time, either automatically or manually.
In the following examples, the server sends an I/O request that modifies the source volume. The changes to the source volume
are replicated to the destination Storage Center over Fibre Channel or iSCSI.
Before Live Migration
Before a Live Migration, the server sends I/O requests only to the volume to be migrated.
Figure 3. Example of Configuration Before Live Migration
1. Server
2. Server I/O request to volume over Fibre Channel or iSCSI
3. Volume to be migrated
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Storage Center Administration