IBM SC34-7012-01 manual BWO requirements, Component name, Full DFSMS/MVS name, Previous product

forward-recovery logs. Long-running transactions, automated teller machines, and continuously available applications require the database to be up and running when the backup is being taken.

The concurrent copy function used along with BWO by DFSMSdss allows backups to be taken with integrity even when control-area and control-interval splits and data set additions (new extents or add-to-end) are occurring for VSAM key sequenced data sets.

BWO requirements

To use the backup-while-open (BWO) support provided by CICS, you can use the Data Facility Storage Management Subsystem/MVS (DFSMS/MVS) or a program product that provides equivalent function.

You must have your environment configured with the following modules and components:

vUse Release 2, or later, for data sets used in non-RLS access mode and Release 3 for data sets used in RLS access mode.

vYou must install the DFSMSdfp IGWAMCS2 callable services module in the link pack area (LPA).

vYou must install the IGWABWO module, supplied in SYS1.CSSLIB, in the LPA, or include SYS1.CSSLIB in the link list. Do not include the library in the STEPLIB or JOBLIB library concatenations.

vYou must have the DFSMSdfp, DFSMSdss, and DFSMShsm components of DFSMS installed on the processors that perform backup and recovery.

During initialization, CICS determines the availability of BWO support by issuing calls to the callable services modules IGWAMCS2 and IGWABWO. CICS also checks on the DFSMSdss release level by calling the DFSMSdss module ADRRELVL. If access to this DFSMSdss module is strictly controlled by an external security manager, such as RACF, security violation messages are issued against the CICS userid, unless the CICS region userid is authorized to access this module.

Note that CICS VSAM Recovery for z/OS, which performs forward recovery, must be installed on the processor where forward recovery is to be done. CICS VSAM Recovery is required for forward recovery and backout of CICS VSAM data sets backed up with BWO and concurrent copy functions of DFSMS/MVS.

Table 2 cross-references the storage management component names of DFSMS to the previous names of the individual licensed programs:

Table 2. Cross-reference of DFSMS/MVS product terminology

Component name	Full DFSMS/MVS name	Previous product
		name
DFSMSdfp	Data Facility Storage Management	MVS/DFP
	Subsystem data facility product
DFSMShsm	Data Facility Storage Management	DFHSM
	Subsystem hierarchical storage manager
DFSMSdss	Data Facility Storage Management	DFDSS
	Subsystem data set services

204CICS TS for z/OS 4.1: Recovery and Restart Guide