I have never heard anyone complain abut using the SUBSYS setup to save major CPU and elapsed time. The job at hand is to use the tools we have to satisfy the business needs, not to complain about the tiny extra steps required by the tool.
BLSR "Just Works", and that is good enough for me until someone can show me a better way (with real-life examples please). Peter -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Martin Packer Sent: Thursday, July 6, 2023 2:53 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: What happened to GC26-1672 Batch Local Shared Resource(LSR) Documentation? I don't think I've seen any. Anyone? I do think I heard people didn't much like having a subsystem to do this job - after all SUBSYS= in JCL is needed. (No disrespect to those that built BLSR - twice, I believe.) Cheers, Martin From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Farley, Peter <0000031df298a9da-dmarc-requ...@listserv.ua.edu> Date: Thursday, 6 July 2023 at 19:45 To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> Subject: [EXTERNAL] Re: What happened to GC26-1672 Batch Local Shared Resource(LSR) Documentation? Martin, I understand that access bias is supposed to be the replacement for the BLSR subsystem, but I have to report that the admittedly ad-hoc local tests I have done showed me that BLSR generates far better results in reducing CPU and I/O for VSAM files than the new "access bias" tools do. Are there any publicly available head-to-head comparison reports done by IBM showing that access bias is an improvement over BLSR for the same sets of access patterns? Such a report showing the access bias parameters used vs matching BLSR buffer specifications for varieties of access patterns would be instructive and helpful. Peter -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Martin Packer Sent: Thursday, July 6, 2023 2:34 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: What happened to GC26-1672 Batch Local Shared Resource(LSR) Documentation? I rather thought the modern way was with built in things like access bias, rather than relying on a subsystem. Is there a particular reason you need BLSR? Cheers, Martin From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Farley, Peter <0000031df298a9da-dmarc-requ...@listserv.ua.edu> Date: Thursday, 6 July 2023 at 19:26 To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> Subject: [EXTERNAL] Re: What happened to GC26-1672 Batch Local Shared Resource(LSR) Documentation? I didn't find the one you requested, but I did find GC28-1469-00, "MVS Programming: Batch Local Shared Resources Subsystem Guide". Sent PDF privately, link found on the web here: https://publibz.boulder.ibm.com/epubs/pdf/iea5j600.pdf HTH Peter -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Steve Estle Sent: Thursday, July 6, 2023 1:56 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: What happened to GC26-1672 Batch Local Shared Resource(LSR) Documentation? All, Unfortunately, I have to date myself a bit, but back in the 90's while with IBM, I implemented batch LSR on some VSAM batch jobs that significantly reduced some batch jobs run time and overall CPU usage - Hours to minutes and ~75% reduction in CPU time. I have now the need to use Batch LSR and work with applications team that owns a job, but can't locate the current Batch LSR documentation as it applies to ZOS (we are 2.5 shop). I'm now using ZBNA to do similar things on my current account (btw I can't say enough good things about ZBNA - thanks to John Burg and WSC team! I've looked on IBM's documentation and Book Manager sites and cannot locate. I've found some references via Google search and searched this forum / archives and see references that the document is out there in either the MVS collection (possibly OS/390 collection too), but truly not sure where to locate this invaluable documentation anymore, but certainly thought there would be a current version of the doc(?) somewhere online - but maybe not. Any IBMers out here monitoring this forum, can we get a current version in ZOS documentation? So here is best document number and name of document that I know of based online searches: GC26-1672 Batch Local Shared Resources If anyone has this document you can just email it to me at steven.es...@peraton.com as PDF file. Thanks very much for everyone's help, -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
