IBM XIV STORAGE SYSTEM, User Manual

Page: 247 / 652

Defining Data Migration Configuration
Defines a Data Migration configuration.
dm_define vol=VolName target=TargetName lun=SourceLUN
source_updating=<yes|no> [ create_vol=<yes|no> ] [ pool=PoolName ]
Parameters:
Name Type Description Mandatory Default
vol Object name Data Migration
destination volume
on the local
system. Y N/A
target Object name Remote system
containing the
source volume. Y N/A
lun Integer LUN of the source
volume. Y N/A
source_
updating
Boolean Specifies whether
to use source
volume updating. Y N/A
create_vol Boolean A Boolean that
determines
whether to create a
new volume or to
use an existing
one. N No
pool Object name Name of the
Storage Pool to
contain the
volume. Used only
when creating a
volume.
Mandatory when
creating a volume. N N/A
This command defines a Data Migration relationship between a local volume and a
remote volume. This definition defines that the local volume should reflect the
remote volume.
After this configuration has been defined, it can be tested using the Testing the
Data Migration Definition command and then activated using the Activating Data
Migration command. After this activation, hosts can read and write to this volume,
and these operations are reflected on the remote volume.
The remote volume may be inaccessible at the time that the command is executed.
In this case, the definition is only used when Data Migration is tested.
The local system acts as a host to the remote system. The remote system should be
configured to make the remote volume accessible to the local system through the
specified LUN.
If source updating is specified, each write to the local volume is reflected as a write
to the remote volume. Otherwise, writes on the local volume are not reflected and
the remote volume is not changed.
Chapter 12. Data Migration
241