3–Data Migration ObjectsData Migration Jobs3-4 ISR654608-00 BThe 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 TypesDMS supports both offline and online migration job types.Offline Data MigrationDMS as an offline service allows you to migrate data between any Fibre Channelstorage arrays, iSCSI storage arrays, or Fibre Channel and iSCSI storage arrays.Offline service assumes that when a data migration job for the specified LUNstarts, access to the LUN is blocked for servers and applications that are using thesource LUNs for data storage. You do not need to bring down these applicationsduring the initial setup and configuration of DMS. DMS minimizes the downtime byallowing the complete setup and configuration of data migration jobs (except forimmediate 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 MigrationDMS as an online service allows you to use the iSR6200 to migrate data while theapplication remains online and continues to access the data. Currently, onlineservice supports data migration between Fibre Channel arrays. While performingonline data migration, the data path for the source LUNs must be configuredthrough the iSR6200. For details, see “Presenting LUNs to the Server for OnlineData Migration” on page 5-5.Job SchedulingThe iSR6200 data migration service provides multiple data migration jobscheduling options to optimize bandwidth usage and minimize application downtime. It provides a priority-based serial scheduling feature that enables you to lineup migration jobs and execute them in serial or parallel fashion, based onavailable 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 ScheduleUse the Immediate Schedule option to schedule a data migration job to instantlystart data migration. For offline data migration, ensure that both the source anddestination LUNs are not being accessed by any application when this option isselected.
