IBM TotalStorage DS6000 Series - Manual (Page 281)

Chapter 13. Data Migration in zSeries environments 257
Most of these benefits also apply to migration efforts controlled by the customer when utilizing
TDMF or FDRPAS in customer-managed systems.
To summarize: Piper for z/OS is an IGS service offering which relieves the customer of the
actual migration process and requires customer involvement only in the planning and
preparation phase. The actual migration is transparent to the customer’s application hosts
and Piper even manages a concurrent switch-over to the target volumes. Piper is neutral to
the disk storage vendors and works for all devices supported under z/OS or OS/390. Piper
will soon provide a FICON-only configuration since the DS6800 only supports FCP FICON
and not ESCON.
Data migration with z/OS Global Mirror
Another alternative is z/OS Global Mirror (XRC). XRC is an asynchronous solution that has a
mode for disaster recovery solutions as well as a particular migration mode of
SESSIONTYPE(MIGRATE). This mode does not require the customer to plan for a
JOURNALs configuration at the secondary site, which is mandatory for D/R solutions based
on XRC.
Figure 13-3 Data Migration with z/OS Global Mirror (XRC)
When coming from ESCON connectivity, it might be a good time to switch to FICON during
the data migration, even though this makes the migration a bit more complex. XRC is the right
vehicle to perform the migration transparently, and for an online data migration approach it is
almost non-disruptive. The application only needs to shut down for the actual switch to the
Production systems
OS/390
zOS
zLINUX
zVM
VSE/ESA no minidisks
Director
ANTAS002
SDM LPAR
SDM1
SDM2 XRECOVER
XRECOVER
Primary
Volume
Secondary
Volume
Source
Disk
subsystems
Target
Disk
Servers
ANTAS001
ESCON FICON
ESCON
FICON