"BTW: Few questions Where can I read about VSAM SHR (4 x)? Was SHR (4 x) available on MVS or its predecessor? Is there any "introduction" of VSE disks usage, datasets, and so called file system? How is it similar to z/OS?"
You can read about VSAM on VSE in the VSE guides. SHR(4 x) was available on MVS/ESA and up, but for file integrity no one ever used it. VSE file system is the same as MVS, without PDS. Instead VSE uses a library system. But sequential files, VSAM files, ISAM files all work the same way. Just the JCL is different. In MVS, you have a DD statement to describe a file, In VSE, you use a DLBL , EXTENT and ASSGN to define a file... IN VSE, you assign units, and POWER virtualizes them. Example, a JOB running in FA, FB and BG might all have the same ASSGN: //ASSGN SYSRDR,00C //ASSGN SYSPCH,00D //ASSGN SYSPRT,00E A disk file: //DLBL SYS009,'my.sequen.tial.file',0,SD //EXTENT SYS009,VOL001,,,100,100 < Starting at track 100 for 100 tracks //ASSGN SYS009,DISK,VOL=VOL001,SHR //EXEC DITTO,REGION=1024K < Run the DITTO program Also VSE is backwards with regards to some things. In VSE, you define the files first then EXEC the phase. In MVS, you EXEC the PGM/PROC first, then define the files. In VSE EXEC specifies a PGM (aka phase) unless the PROC keyword is used. In MVS, EXEC specifies a PROC, unless the PGM keyword is used. Joe On Sun, Nov 1, 2020 at 6:53 AM R.S. <r.skoru...@bremultibank.com.pl> wrote: > W dniu 31.10.2020 o 00:40, Joe Monk pisze: > > Radoslaw, > > > > He is asking about shareoption (4 x) not (x 4) aka cross-region sharing, > > not cross-system sharing. > > > > In VSE, Shareoption(4) allows vsam file sharing among partitions (similar > > to a z/os address space). VSE manages that automatically, for the user. > > Well, I just learnt something new about VSAM. Thank you. > Actually it is strictly related to z/VSE - this system is unknown for me > (my research told me there were only two installations in Poland). > For example I don't know what is partition in VSE and how it is differ > from regular address spaces or just several jobs (in VSE) working with > same shared VSAM file. > > BTW: Few questions > Where can I read about VSAM SHR (4 x)? > Was SHR (4 x) available on MVS or its predecessor? > Is there any "introduction" of VSE disks usage, datasets, and so called > file system? How is it similar to z/OS? > > > > However, regarding the subject I sustain that migration to Db2 is worth > to analyze. > Of course everything depends on many factors like appliation complexity, > staff availability, MIPS in use, budget, plans for the future, etc. > > -- > Radoslaw Skorupka > Lodz, Poland > > > > > > ====================================================================== > > Jeśli nie jesteś adresatem tej wiadomości: > > - powiadom nas o tym w mailu zwrotnym (dziękujemy!), > - usuń trwale tę wiadomość (i wszystkie kopie, które wydrukowałeś lub > zapisałeś na dysku). > Wiadomość ta może zawierać chronione prawem informacje, które może > wykorzystać tylko adresat.Przypominamy, że każdy, kto rozpowszechnia > (kopiuje, rozprowadza) tę wiadomość lub podejmuje podobne działania, > narusza prawo i może podlegać karze. > > mBank S.A. z siedzibą w Warszawie, ul. Senatorska 18, 00-950 Warszawa, > www.mBank.pl, e-mail: kont...@mbank.pl. Sąd Rejonowy dla m. st. Warszawy > XII Wydział Gospodarczy Krajowego Rejestru Sądowego, KRS 0000025237, NIP: > 526-021-50-88. Kapitał zakładowy (opłacony w całości) według stanu na > 01.01.2020 r. wynosi 169.401.468 złotych. > > If you are not the addressee of this message: > > - let us know by replying to this e-mail (thank you!), > - delete this message permanently (including all the copies which you have > printed out or saved). > This message may contain legally protected information, which may be used > exclusively by the addressee.Please be reminded that anyone who > disseminates (copies, distributes) this message or takes any similar > action, violates the law and may be penalised. > > mBank S.A. with its registered office in Warsaw, ul. Senatorska 18, 00-950 > Warszawa,www.mBank.pl, e-mail: kont...@mbank.pl. District Court for the > Capital City of Warsaw, 12th Commercial Division of the National Court > Register, KRS 0000025237, NIP: 526-021-50-88. Fully paid-up share capital > amounting to PLN 169.401.468 as at 1 January 2020. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
