HP MPX200 Multifunction Router - Manual (Page 21)

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I/O size: You can configure each data migration job to migrate data using a specified I/O
size. Different types of arrays and LUNs may provide optimum performance based on the I/O
size. The default size is 64 K.
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Thin-provisioned LUN: MPX200 supports conversion of a regularly provisioned LUN to a
thin-provisioned LUN. If a destination LUN supports thin provisioning, you can opt to configure
this migration job as thin provisioned. For more information, see
“Migration to a
thin-provisioned LUN ” (page 29) .
The data migration wizard enables you to configure multiple jobs in a batch mode. The jobs
configured in batch mode have the same common attributes. For more information, see
“Scheduling
data migration jobs in batch mode” (page 58) .
Migration types
DMS supports both offline and online (local and remote) migration job types.
Offline data migration
DMS as an offline service allows you to migrate data between FC storage arrays, iSCSI storage
arrays, or FC and iSCSI storage arrays. Offline service assumes that when a data migration job
for the specified LUN starts, access to the LUN is blocked for servers and applications that are
using the source LUNs for data storage. You do not need to bring down these applications during
the initial setup and configuration. DMS lets you setup and configure tasks (except for immediate
scheduling of the jobs) while applications are running. Only during the actual data migration does
an application or a server need to be taken offline.
Online data migration
As an online service, DMS allows you to use the MPX200 to migrate data while an application
remains online and continues to access the source data. Online data migration can be either local
or remote (online data migration between two remote data centers). For online data migration,
you must configure the data path for the source LUNs through the MPX200. For more information,
see
“Presenting LUNs to the server for online data migration” (page 46) .
Job scheduling
The MPX200 data migration service provides multiple data migration job scheduling options to
optimize bandwidth usage and minimize application down time. It provides a priority-based serial
scheduling feature that enables you to queue migration jobs and execute them in serial or parallel
fashion, based on available resources.
You can schedule data migration jobs for execution in the following ways:
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Immediate Schedule (start now)
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Delayed Schedule (start at a later time within the next 30 days)
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Serial Schedule (priority-based scheduling)
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Configure Only (manually start later)
Immediate Schedule
Use the Immediate Schedule option to schedule a data migration job to instantly start data migration.
For offline data migration, ensure that both the source and destination LUNs are not being accessed
by any application when this option is selected.
Delayed schedule
Use the Delayed schedule option to schedule a data migration job to start at a later time. When
you select this option during configuration of a migration job, you are requested to enter the start
time. This allows you to configure a migration job during normal business hours and perform actual
Data migration jobs 21