Re: Catalogs in parallel sysplex ECS vs RLS
Thank-you all for your responses. Again the IBM-Main community shows it's strength. I think I'll be sticking with ECS at the moment. Much appreciated, Peter -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Catalogs in parallel sysplex ECS vs RLS
>While RLS catalog sharing require more effort to establish, it wasn't >introduced just for fun. It seems customers needed some enhancement over >ECS. IIRC from the course, it was for performance reasons. RSL provides better performance for heavily used catalogs. Met vriendelijke groet, Kees Vernooij KLM Information Services z/OS Systems Tel +31 6 10 14 58 78 -Original Message- From: IBM Mainframe Discussion List On Behalf Of R.S. Sent: 24 April 2020 11:20 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Catalogs in parallel sysplex ECS vs RLS W dniu 23.04.2020 o 16:29, Peter Vander Woude pisze: > Ok, building parallel sysplex. For the catalogs I am planning on using ECS > for the shared catalogs (which is all of them). > > What is the recommended method for handling the catalogs in a parallel > sysplex, ECS or VSAM RLS? What is recommended method? It depends. :-) WHAT DO YOU NEED? "Legacy" catalog sharing is worse than ECS. ECS is relatively easy to implement. However many years later IBM introduced catalog sharing with RLS. It is more effective for extensive sharing of given BCS, however Master Catalog cannot be shared that way. While RLS catalog sharing require more effort to establish, it wasn't introduced just for fun. It seems customers needed some enhancement over ECS. Again, YMMV, we don't know your workload, etc. If you are starting with that, think about VLF (it's not related to sharing), then ECS. However if you are using RLS, you have the infrastructure up and ready, so RLS catalog sharing seem to be low hanging fruit. Last, but not least: sharing outside sysplex is completely different animal, and you should avoid it as possible. In that case absolutely don't try to use ECS or RLS. -- 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 025237, 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 025237, 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 information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Catalogs in parallel sysplex ECS vs RLS
W dniu 23.04.2020 o 16:29, Peter Vander Woude pisze: Ok, building parallel sysplex. For the catalogs I am planning on using ECS for the shared catalogs (which is all of them). What is the recommended method for handling the catalogs in a parallel sysplex, ECS or VSAM RLS? What is recommended method? It depends. :-) WHAT DO YOU NEED? "Legacy" catalog sharing is worse than ECS. ECS is relatively easy to implement. However many years later IBM introduced catalog sharing with RLS. It is more effective for extensive sharing of given BCS, however Master Catalog cannot be shared that way. While RLS catalog sharing require more effort to establish, it wasn't introduced just for fun. It seems customers needed some enhancement over ECS. Again, YMMV, we don't know your workload, etc. If you are starting with that, think about VLF (it's not related to sharing), then ECS. However if you are using RLS, you have the infrastructure up and ready, so RLS catalog sharing seem to be low hanging fruit. Last, but not least: sharing outside sysplex is completely different animal, and you should avoid it as possible. In that case absolutely don't try to use ECS or RLS. -- 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 025237, 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 025237, 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
Re: Catalogs in parallel sysplex ECS vs RLS
I recall from a z/OS update course, a couple of years ago already, the recommendation that RLS for Catalogs was the way to go. Kees. -Original Message- From: IBM Mainframe Discussion List On Behalf Of Peter Vander Woude Sent: 23 April 2020 16:29 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Catalogs in parallel sysplex ECS vs RLS Ok, building parallel sysplex. For the catalogs I am planning on using ECS for the shared catalogs (which is all of them). What is the recommended method for handling the catalogs in a parallel sysplex, ECS or VSAM RLS? Thanks, Peter -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Catalogs in parallel sysplex ECS vs RLS
One or the other, not both. It's OK to use either/or on a catalog by catalog basis, but you cannot double down. Reference z/OS 2.2.0 DFSMS Managing Catalogs - Accessing Catalogs for Record Level Sharing, Restrictions: * Master catalogs are currently not supported in RLS mode. Ensure that any catalog in RLS mode is not being shared as a master catalog by any system in the plex. * RLS protocol cannot be used simultaneously with either ECS or VVDS protocol for a catalog. This is enforced by the SMSVSAM address space. If you attempt to use a catalog currently in RLS mode from a non-RLS system in the sysplex, the associated catalog request will fail with return code RC4 and reason code RSN124. If a catalog is currently in either ECS mode or VVDS mode and is shared by a system that cannot support RLS for catalogs, the attempt to use the catalog in RLS mode will also fail with return code RC4 and reason code RSN124. To place a catalog in RLS, it must be SMS-managed, and the SMSVSAM server must be active on all systems in the sysplex. You can move a catalog in and out or RLS mode with RLSQUIESCE and RLSENABLE, for emergency or maintenance purposes, but it's not recommended to do so frequently. We put all of our user catalogs in RLS, except for two specific catalogs with system-critical dataset entries, that don't get hit that often. These are in VLF. RLS seems to be the better performing option for us. Art Gutowski General Motors, LLC On Thu, 23 Apr 2020 16:43:44 +, Allan Staller wrote: >ITYM ECS. (Enahnced Catalog Sharing). > >ECS is specific to catalogs and uses a structure for inter-image communication. >RLS uses a local address space (SMSVSAM) for local communication AND a >structure for inter-image communication. > >Both are performance related. > >IMO, RLS is more appropriate for applications. ECS is less overhead. > >ECS should be sufficient for most purposes. I have not researched the >practicality or mpact of attempting both on the same catalog (KSDS). > >-Origanal Message- >From: IBM Mainframe Discussion List On Behalf Of >Peter Vander Woude >Sent: Thursday, April 23, 2020 9:29 AM >To: IBM-MAIN@LISTSERV.UA.EDU >Subject: Catalogs in parallel sysplex ECS vs RLS > >Ok, building parallel sysplex. Forhthe catalogs I am planning on using ECS >for the shared catalogs (which is all of them). > >What is the recommended method for handling the catalogs in a parallel >sysplex, ECS or VSAM RLS? -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: Catalogs in parallel sysplex ECS vs RLS
ITYM ECS. (Enahnced Catalog Sharing). ECS is specific to catalogs and uses a structure for inter-image communication. RLS uses a local address space (SMSVSAM) for local communication AND a structure for inter-image communication. Both are performance related. IMO, RLS is more appropriate for applications. ECS is less overhead. ECS should be sufficient for most purposes. I have not researched the practicality or mpact of attempting both on the same catalog (KSDS). HTH, -Original Message- From: IBM Mainframe Discussion List On Behalf Of Peter Vander Woude Sent: Thursday, April 23, 2020 9:29 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Catalogs in parallel sysplex ECS vs RLS [CAUTION: This Email is from outside the Organization. Do not click links or open attachments unless you trust the sender.] Ok, building parallel sysplex. For the catalogs I am planning on using ECS for the shared catalogs (which is all of them). What is the recommended method for handling the catalogs in a parallel sysplex, ECS or VSAM RLS? Thanks, Peter -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ::DISCLAIMER:: The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Catalogs in parallel sysplex ECS vs RLS
Ok, building parallel sysplex. For the catalogs I am planning on using ECS for the shared catalogs (which is all of them). What is the recommended method for handling the catalogs in a parallel sysplex, ECS or VSAM RLS? Thanks, Peter -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
