IBM SG24-5360-00 manual Appendix C. VSE/VSAM Considerations

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Appendix C. VSE/VSAM Considerations

VSE/VSAM support is not included in IXFP/SnapShot for VSE/ESA. This does not mean however that you cannot take advantage of IXFP/SnapShot for VSE/ESA with VSE/VSAM data sets.

It does mean that there is no support in IXFP/SnapShot for VSE/ESA to dynamically adjust the VSAM catalog to reflect the target of the SnapShot copy. However, through job control, a user catalog can point to the SnapShot copy and access the data on the copy. In our test, we created a VSAM user catalog (UCAT), space, and cluster on a volume at address 80E with serial number PATEV1. We then snapped the volume to device address 80F with serial number PATEV2, changing the volume serial number to PATEV1 in the process using the following procedure:

1.Close any opened files on the volume. (This may include shutting down CICS or other applications.)

2.Issue the following commands:

0 dvcdn 80f

ixfp snap,patev1:80f,vol1=patev1 0 dvcup 80f

3.The JCL to access the source volume is:

//DLBL UCAT01,′VOLSER.USER.CATALOG′,,VSAM

//DLBL DDNAME,′USER.FILE.ID′,,VSAM,CAT=UCAT01

4.To process data from the target volume, use the following JCL to access the VSAM file:

//DLBL UCAT01,′VOLSER.USER.CATALOG′,,VSAM

//EXTENT SYS099,PATEV1

//ASSGN SYS099,80F,SHR

//DLBL DDNAME,′USER.FILE.ID′,,VSAM,CAT=UCAT01

//EXTENT SYS099,PATEV1

The first JCL finds the source volume because its device address is lower than the target volume′s. The second JCL can only use the data from device address 80F because we have explicitly pointed to that device with the ASSGN statement. In this case, we can access the snapped copy of the VSAM files on device 80F and copy it to the original volume, if required as part of a recovery effort.

5.After using the target volume and its VSAM file, release the space back to the RVA by issuing the ixfp ddsr 80f command. (Remember that 80F would have to be DVCDNed before the IXFP DDSR command could be successfully executed.) You can also retain it online for use in a VSE/ESA partitionÐas long as the duplicate volume serial number and UCAT will not create a problem.

© Copyright IBM Corp. 1999

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Contents International Technical Support Organization Page International Technical Support Organization First Edition January Contents Peer-to-Peer Remote Copy Itso Redbook Evaluation Contents Vi Ramac Virtual Array, Peer-to Peer Remote VSE/ESA Team That Wrote This Redbook PrefaceYour comments are important to us Comments WelcomeIBM Ramac Virtual Array What Is an IBM Ramac Virtual Array?Overview of RVA and the Virtual Disk Architecture Log Structured File− Functional track table Data Compression and CompactionWhat Is IXFP/SnapShot for VSE/ESA? What Is SnapShot?VSE/ESA Support for the RVA Deleted Data Space Release What Is IXFP?Reporting Functions What Is Peer-to-Peer Remote Copy?Ramac Virtual Array, Peer-to Peer Remote VSE/ESA RVA Benefits for VSE/ESA RVA Simplifies Your Storage ManagementDisk Capacity Administration IxfpBatch Window Improvement IXFP/SnapShot for VSE/ESA Ramac Virtual ArrayApplication Development RVA Data AvailabilityHardware Pprc SnapShotRamac Virtual Array, Peer-to Peer Remote VSE/ESA Prerequisites VSE/ESA Support for the RVAVolumes 1 VSE/ESA Input/Output Configuration ProgramHost Connection Partial Disk Minimal Init Volume Minimal InitAssgn ExecRamac Virtual Array, Peer-to Peer Remote VSE/ESA System VSE/ESA User Time IXFP/SnapShot for VSE/ESASample Batch Job to Invoke Ixfp Report Function DTRIATTN,PARM=′ Ixfp REPORT′IXFP/SnapShot for VSE/ESA Phys DetailAR 0015 CUU DEF DefinedIxfp Snap Full VolumeVSE/VSAM Reply ′ YES′ to ProceedRange of Cylinders Non-VSAM File Expired Files Total Volume Ixfp DDSR,PATEV3Ixfp DDSR,PATEV30000-0999,NOPROMPT Ixfp DDSR,PATEV3DSN=′ test.data.3′ , Noprompt Specified FileIxfp REPORT,80E Ixfp REPORT,80F Ixfp REPORT,80E,80FIxfp Report Device Detail Report Sample Output of Ixfp Report CommandRamac Virtual Array, Peer-to Peer Remote VSE/ESA Subsystem Summary Report Device Summary ReportRamac Virtual Array, Peer-to Peer Remote VSE/ESA Peer-to-Peer Remote Copy Peer-to-Peer Remote CopyPprc Data Flow Pprc and VSE/ESA Software RequirementsInvoking peer-to-peer remote copy Pprc Hardware RequirementsSnapShot Considerations Examples of Pprcopy CommandsPrimary Devices of a Pprc Pair Secondary Devices of a Pprc PairRecovering from a Primary Site Failure Setting Up Pprc Paths and PairsRecovering from a Secondary Site Failure Deleting Pprc Pairs and PathsPhysical Connections to the RVA Determining the Channel Connection Address Determining the Logical Control Unit Number for RVARamac Virtual Array, Peer-to Peer Remote VSE/ESA Functional Device Configuration Appendix A. RVA Functional Device ConfigurationFunctional Device Configuration Screen CD23 Appendix B. Ixfp Command Examples Snap CommandSyntax Ramac Virtual Array, Peer-to Peer Remote VSE/ESA Noprompt Using SnapShot to Copy One Volume to AnotherAR 0015 Capacity DEFINED-CAPACITYTest Prod Overall Test Prod Using SnapShot to Copy Files with Relocation Using SnapShot to Copy a File from One Volume to AnotherIXFP20I Snap Function Completed AT Other Uses of SnapShotSyntax of Ixfp Ddsr Command Details Ddsr CommandUsing Ddsr to Delete the Contents of a Volume Using Ddsr to Delete a Single Data SetUsing Ddsr to Delete the Free Space on an RVA ReportAR+0015 IXFP29D Ddsr for For Deletion Report Command Reporting on the Capacity of Multiple Volumes Reporting on the Capacity of a Single VolumeReporting on the Capacity of the RVA Subsystem Device Detail Report FUNC. Capacity MBIXFP/SnapShot Setup Job Streams JOB WCWTEST1Exec DTRIATTN,PARM=′ Ixfp REPORT′ BG 0000 1A86I Following Assignments are Released BG 0000 // JOB InitdiskIxfp DDSR,80E Ready Ixfp DDSR,80F $$DITTO BLKFACTOR=1 EOJ 50.83 47.86 AR 0015 1I40I Ready$$DITTO BLKFACTOR=1 $$DITTO EOJ 726532.208 MB 117880.209 MB 57754.953 MB Appendix C. VSE/VSAM Considerations Backing up Vsam Volumes Appendix C. VSE/VSAM Considerations Ramac Virtual Array, Peer-to Peer Remote VSE/ESA Appendix D. Iocds Example Ramac Virtual Array, Peer-to Peer Remote VSE/ESA Appendix E. Special Notices Following terms are trademarks of other companies International Technical Support Organization Publications Appendix F. Related PublicationsRedbooks on CD-ROMs Other PublicationsRamac Virtual Array, Peer-to Peer Remote VSE/ESA ∙ E-mail Orders How to Get Itso RedbooksPlease send me the following IBM Redbook Fax Order FormSee CKD IndexPprc distance Please answer the following questions Itso Redbook EvaluationSG24-5360-00