Protection; Data Migration Jobs; Data Migration Job Attributes - HP StorageWorks 6400/8400 - Enterprise Virtual Array User Manual

other applications and servers using the same source array to continue to perform at an acceptable
performance level.
• Load Balancing: The MPX200 detects all available multiple active and passive paths to the LUN.
Load balancing balances the load for migration jobs over multiple active paths, thus improving
the migration rate.

Protection

DMS provides data protection against some of the common user errors by enforcing the following
restrictions:
• An array must have an attribute of either Source, Destination, or Source+Destination
to participate in the migration. When you configure a data migration job, source LUNs can be
assigned only from an array with the attribute Source (or Source+Destination), and Destination
LUNs can be assigned only from an array with the attribute Destination (or Source+Destination).
Use these attributes properly to avoid errors.
• A user acknowledgement is required for a data migration job after the job is completed. This
feature provides better accounting and record keeping for the job. The data migration log indicates
when the job was completed and when you acknowledge the completion status of the job.
• After a LUN is configured as a Destination LUN for a specific data migration job, the LUN cannot
be configured for a different job until the current job is completed and you acknowledge or remove
the job.
• DMS detects the normal configuration of partitions on the data LUN. Before fully configuring a
data migration job, DMS provides a warning if it detects valid partition tables on the destination
LUN.

Data migration jobs

DMS manages the data migration processes in terms of data migration jobs. A maximum of 256 jobs
can be scheduled to run at any time.

Data migration job attributes

Configure a data migration job for the following attributes:
• Source and Destination LUN: You can configure a single source LUN to migrate to one or multiple
destination LUNs. Any specified destination LUN can be part of a single data migration job.
• Job groups: For better manageability, you can configure data migration jobs to belong to a spe-
cific, user-defined job group. By default, a job is assigned to a default Group 0.
• Scheduling: You can configure data migration jobs to start immediately, to start at a specified
time, or to use a priority-based serial scheduling. For details, see the "Scheduling..." sections under
"Scheduling an individual data migration job in the
• 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 64K.
The Data Migration wizard enables you to configure multiple jobs in batch mode. The jobs con-
figured in batch mode have the same common attributes. For more details, see
Migration
142 Offline Data Migration
Wizard" on page 155.
GUI" on page 156.
"Using the Data