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. Joe On Fri, Oct 30, 2020 at 6:22 PM R.S. <[email protected]> wrote: > W dniu 30.10.2020 o 23:51, Tony Thigpen pisze: > > All, > > > > I have a z/VSE client that believes it is time to move to z/OS. But, > > they have one big concern. They have a lot of ShareOption=4 VSAM files. > > > > For those that don't know it, ShareOption=4 files on z/VSE "work out > > of the box" without any need for the application program to perform > > any enqueue or dequeue. z/VSE automatically performs those functions, > > unlike z/OS where the application has to handle the enqueue process. > > > > In their case, they use shareoption=4 so that they can update VSAM > > files from batch Cobol programs while at the same time CICS Cobol > > programs are also updating the files. They don't want to have to > > change their programs. > > > > From my initial research, it appears that this same function can be > > reproduced on z/OS using DFHSMStvs. (And, it looks like VSAM-RLS is > > also required to support DFHSMStvs.) > > > > Are we going down the right path? > > IMHO no. > > Some remarks: > 1. Any migration will require some work to do. Sometimes little less > effort give you much worse results. > 2. SHR (x 4) means cross-system sharing. Why it is cross-system? Why > don't you consolidate it into one system? What are the reasons? > 3. VSAM RLS is almost free - that means it is not licensed, but it > require Coupling Facility - even in single system configuration. Such > kind of Parallel Sysplex. Even when you want to have single CPC, you > still need CPU engine for CF, that is ICF processor. It is approx. 250k$ > (for big machine). And some memory. However tvs is not necessary. Note: > tvs is paid, because there are ISV options. And there are some IBM > add-ons like CICSVR, etc. > 4. Let's go back to point 1 - maybe it is good time to move from VSAM to > Db2? Note, there is special software product which allow VSAM > application to work with Db2 with minimal changes. And of course you > would have a lot of Db2 advantages over VSAM, and any new development > could directly interface with Db2, not Db2 under cover of VSAM. Of > course neither the product, nor Db2 is free, but... > > > -- > 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: [email protected]. 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: [email protected]. 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 [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
