Front cover -- Contents -- Figures -- Notices -- Trademarks -- Preface -- The team that wrote this redbook -- Become a published author -- Comments welcome -- Chapter 1. Introduction to DFSMStvs -- 1.1 VSAM sharing without DFSMStvs -- 1.1.1 Basic VSAM sharing -- 1.1.2 MVS scheduler and sharing through MVS system services -- 1.1.3 Record-level sharing -- 1.2 DFSMStvs overview -- 1.2.1 Recoverable data sets and logging -- 1.2.2 Two-phase commit -- 1.3 Batch application considerations -- 1.3.1 Commit frequency -- 1.3.2 Sharing files beyond today's batch job structure -- 1.3.3 Unit of recovery -- 1.3.4 Application restart -- 1.4 Batch performance observations -- 1.4.1 Exploiting DFSMStvs with parallel batch programs -- 1.4.2 Our experiences with parallelizing batch jobs -- 1.5 Value of DFSMStvs -- 1.6 Summary -- Chapter 2. Using commit and backout -- 2.1 Unit of recovery -- 2.2 Programming changes -- 2.2.1 How to commit -- 2.2.2 How to perform a backout -- 2.2.3 How often to commit -- 2.3 Rerunning jobs -- 2.4 Summary -- Chapter 3. Transactional recovery -- 3.1 Batch application restart -- 3.1.1 Conventional batch job structure -- 3.1.2 Using DFSMStvs: unique input -- 3.1.3 Using DFSMStvs: shared input -- 3.2 Use of forward recovery log -- 3.3 CICSVR overview -- 3.4 Summary -- Chapter 4. Defining VSAM data sets for DFSMStvs -- 4.1 Recoverable data sets -- 4.2 IDCAMS definitions -- 4.2.1 IDCAMS DEFINE CLUSTER parameters -- 4.2.2 Definition for PL/I example -- 4.3 Storage management considerations -- 4.3.1 Data class use -- 4.3.2 Storage class use -- 4.3.3 Management class use -- 4.3.4 Backup while open -- 4.3.5 Reorganization -- 4.4 Summary -- Chapter 5. DFSMStvs environment -- 5.1 SMS setup -- 5.1.1 Data class considerations -- 5.1.2 Storage class considerations -- 5.2 PARMLIB members -- 5.2.1 IFAPRDxx -- 5.2.2 IGDSMSxx.

5.3 Coupling facility definitions -- 5.3.1 Log stream names -- 5.3.2 Log streams and log structures -- 5.4 Summary -- Chapter 6. Migrating a COBOL program -- 6.1 The sample program -- 6.2 Changes to the program -- 6.3 Step 1: OPEN -- 6.4 Step 2: Check for deadlocks and time-outs -- 6.5 Step 3: Add commit and backout logic -- 6.6 Step 4: Add restart logic and a positioning data set -- 6.7 Step 5: Remove writes to spool -- 6.8 Summary -- Chapter 7. Migrating a PL/I program -- 7.1 The sample program -- 7.2 Changes to the program -- 7.3 Step 1: OPEN -- 7.4 Step 2: Check for deadlocks and time-outs -- 7.5 Step 3: Add commit and backout logic -- 7.6 Step 4: Add restart logic and a positioning data set -- 7.7 Summary -- Chapter 8. DFSMStvs experiences -- 8.1 Console log during normal start -- 8.2 Exceptions -- 8.2.1 Committing without DFSMStvs -- 8.2.2 DFSMStvs server not registered to RRS -- 8.2.3 Reestablish connection between SMSVSAM and RRS -- 8.3 Monitoring DFSMStvs -- 8.3.1 SMSVSAM server connected or not connected to RRS -- 8.3.2 Display jobs using DFSMStvs -- 8.3.3 Display a specific cluster and its users -- 8.3.4 Coupling facility structure utilization -- 8.3.5 VSAM RLS central locking structure full -- 8.3.6 Display forward recovery log data sets -- 8.3.7 RRS failure terminating DFSMStvs -- 8.3.8 Coupling Facility lock structure -- 8.4 IDCAMS SHCDS examples -- 8.4.1 Data set list -- 8.4.2 Subsystem summary -- 8.4.3 Data sets by subsystem -- Appendix A. CICS VSAM recovery (CICSVR) example -- Appendix B. Example source code -- Original COBOL program -- Modified COBOL program -- Original PL/I program -- Modified PL/I program -- Glossary -- Related publications -- IBM Redbooks -- Other publications -- Online resources -- How to get IBM Redbooks -- Help from IBM -- Index -- Back cover.