Qlogic iSR6200, Software Manual

Page: 36 / 210

3–Data Migration Objects
Data Migration Jobs
3-4 ISR654608-00 B
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 details,
see
“Scheduling Data Migration Jobs in Batch Mode” on page 5-14 .
Migration Types
DMS supports both offline and online migration job types.
Offline Data Migration
DMS as an offline service allows you to migrate data between any Fibre Channel
storage arrays, iSCSI storage arrays, or Fibre Channel 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 of DMS. DMS minimizes the downtime by
allowing the complete setup and configuration of data migration jobs (except for
immediate scheduling of the jobs) without bringing down the other applications.
The application and server must be offline only during the actual data migration.
Online Data Migration
DMS as an online service allows you to use the iSR6200 to migrate data while the
application remains online and continues to access the data. Currently, online
service supports data migration between Fibre Channel arrays. While performing
online data migration, the data path for the source LUNs must be configured
through the iSR6200. For details, see
“Presenting LUNs to the Server for Online
Data Migration” on page 5-5 .
Job Scheduling
The iSR6200 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 line
up 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:
Immediate Schedule (start now)
Delayed Schedule (start at a later time within the next 30 days)
Serial Schedule (priority-based scheduling)
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.