l
Introduce new storage subsystem technologies with minimal disruption of service.
l
Reclaim z/OS UCBs by simplifying the migration of datasets to larger volumes
(combining volumes).
l
Facilitate data migration while applications continue to run and fully access data
being migrated, eliminating application downtime usually required when migrating
data.
l
Eliminate the need to coordinate application downtime across the business, and
eliminate the costly impact of such downtime on the business.
l
Improve application performance by facilitating the relocation of poor performing
datasets to lesser used volumes/storage arrays.
l
Ensure all metadata always accurately reflects the location and status of datasets
being migrated.
Refer to the
z/OS Migrator Product Guide
for detailed product information.
Volume migration using z/OS Migrator
EMC z/OS Migrator is a host-based data migration facility that performs traditional
volume migrations as well as host-based volume mirroring. Together, these capabilities
are referred to as the volume mirror and migrator functions of z/OS Migrator.
Figure 55
z/OS volume migration
Volume level data migration facilities move logical volumes in their entirety. z/OS
Migrator volume migration is performed on a track for track basis without regard to
the logical contents of the volumes involved. Volume migrations end in a volume swap
which is entirely non-disruptive to any applications using the data on the volumes.
Volume migrator
Volume migration provides host-based services for data migration at the volume level
on mainframe systems. It provides migration from third-party devices to VMAX
devices as well as migration between VMAX devices.
Volume mirror
Volume mirroring provides mainframe installations with volume-level mirroring from
one VMAX device to another. It uses host resources (UCBs, CPU, and channels) to
monitor channel programs scheduled to write to a specified primary volume and clones
them to also write to a specified target volume (called a mirror volume).
After achieving a state of synchronization between the primary and mirror volumes,
Volume Mirror maintains the volumes in a fully synchronized state indefinitely, unless
interrupted by an operator command or by an I/O failure to a Volume Mirror device.
Data Migration
Volume migration using z/OS Migrator 177
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