I have a customer that needs to tune Batch VSAM in a hurry. The two candidate techniques are Batch LSR (BLSR) and System-Managed Buffering (SMB). I've already established there'd be much value in converting NSR OPENs to LSR - so we probably don't need to debate that.
The downside of SMB would be the need to convert each cluster to Extended Format - which I ASSUME can't be done "in place". A copy and a rename would be needed - which is certainly too much for dipping our toe in the water. I can't find anything that suggests BLSR is a DYNAMIC Subsystem - and I don't think we have time for an IPL before we have to make changes. (I'm not 100% certain we absolutely can't.) The narrow question is whether BLSR is a Dynamic Subsystem or not. Wider answers accepted, of course. Thanks, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
