> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Frank Swarbrick > Sent: Thursday, August 06, 2009 1:01 PM > To: IBM-MAIN@bama.ua.edu > Subject: Re: DASD: to share or not to share <snip> > > If you set this up correctly, you will get Record Level > Locking for VSAM > > which will give you some benefits that you lost in moving > from VSE. It > > is something to think about, if you are heavily using VSAM > with onlines > > and batch. > > Can you explain this a bit more? I will admit to not even > knowing how this works on VSE. > > Thanks, > Frank >
It is VSAM Record Level Sharing (not Locking). VSAM/RLS requires a Parallel Sysplex (Coupling Facility) to work. But it basically allows you to share a single VSAM file in read/write mode between CICS regions with integrity. In addition, it allows batch to have READ-ONLY(!) access to the same file, again with read integrity. If you need to share a VSAM file in READ-WRITE mode between one or more CICS and/or batch jobs (i.e. full sharing in R/W mode between any number of CICS and batch jobs concurrently), then you need an extra charge feature called "Transactional VSAM" aka DFSMStvs. This builds on top of VSAM/RLS, so you need VSAM/RLS working before using it. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell john.mck...@healthmarkets.com * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
