CICS® VR
uses logs to recover your VSAM data.
CICS VR
supports:
- MVS™ log
streams
- CICS VR
SAM copies of MVS log
streams
Optional software requirements
CICS VR V4R3 contains additional support
for the following optional software offerings on all supported z/OS and CICS levels.

The following software is optional and is not required to install
and run CICS VR.
- DFSMShsm logical
backups and full volume dumps
- DFSMSdss logical
copies and dumps
- VSAM Record Level Sharing (RLS) - only CICS updates supported. CICS VR VSAM
batch logging does not support RLS data sets.
- DFSMStvs (Transactional VSAM)
- Backups made using the backup while open (BWO) and concurrent copy facilities.

Hardware requirements
You need the following hardware
to run CICS VR:
- A processor supporting the software mentioned in 'Software requirements'
above.
- A tape unit or cartridge unit, disk drive space. Refer to the IBM
CICSVR Version 4 Release 3 Program Directory for required storage
space needed to install CICS VR.
- CICS VR
requires a minimum private area of 4 MB below the 16 MB line to execute.
Optional hardware requirements
The hardware that
provides optional capabilities:
- For concurrent copy:
- An IBM® 3990
Model 3 with the Extended Platform and Licensed Internal Code or an IBM 3990 Model
6.
- For VSAM RLS support:
- A coupling facility device or z/OS image running coupling facility support
is required.
- For CICS VR VSAM batch logging:
- Both DASD-only and coupling facility log streams are supported. Coupling
facility log streams require active coupling facility links, for details see z/OS MVS Setting
up a SYSPLEX.