On Monday 08 December 2008 09:20, David Mierowsky wrote: > DLI physical data structures tend not to change from IMS release to > release as this would require a reorg when changing IMS releases and > I can't recall any time that that has happened. The DOSCOMP keyword > (required for secondary indices) is still supported under IMS V10 as far > as I can see.
I also think IMS/DB still supports DOSCOMP, but this is only part of the story - the other problem is that VSE and z/OS can no longer access the same VSAM data sets. VSE was never able to read ICF catalogs which were created 25 years ago and are the only catalogs supported in MVS since 1/1/2000. When the VSE-OS/390 red book was written in 97/98, OS/390 was still able to define VSAM catalogs, and also access VSE catalogs on shared DASD. But since 1/1/2000, recent versions of OS/390 and all versions of z/OS can no longer define or open VSAM catalogs, either VSE or MVS. So, I suspect that if you convert your VSE DL/I data bases to be compatible with IMS/DB and move them to DASD shared between VSE and z/OS, then IMS/DB will not be able to open them. So you must transfer the data bases one by one from VSE to z/OS, using DL/I utility programs, or, if they are in compatible format and you have DrD in VSE, you can use it to back up DL/I data bases and restore them in z/OS with DRDMVS. DRD+DRDMVS may be significantly faster than other transfer methods. I was involved in a recent VSE/zOS conversion which had, by far, the largest amount of DL/I I ever saw (590 DBDs and over 1000 DL/I utility steps). Data transfer time was not a big issue (the company was not a bank), so they preferred to use standard DL/I UNLOAD/RELOAD utilities to transfer the data bases on 3590 tapes. -- Gilbert Saint-Flour GSF Software http://gsf-soft.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
