> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Mike Myers > Sent: Tuesday, May 27, 2008 1:00 PM > To: [email protected] > Subject: USS file sharing in z/OS > > Hi: > > I seem to recall seeing some restrictions on the ability to > share USS files between LPARs in a basic sysplex, although I > don't remember where I saw the reference. > > My question is this. We have a basic sysplex here and our > primary application uses the DB2 Text Extender, which employs > the z/OS Text Search facility. It looks as if all of Text > Search is embodied in USS HFS files. Looking at the USS > parameters for these files, I see they are mounted RDWR. We > are upgrading from z/OS v1.r4 to z/OS v1.r7 and I would like > to test the application that uses the functions on v1.r7 > before putting v1.r7 into production. What is required to > protect USS files (if shared) against concurrent update > corruption? And, can a basic sysplex (as opposed to a > parallel sysplex) manage that? > > For additional background, we have two separate applications, > one production and one test. Normally, they both run on the > same LPAR. What I want to do is run the production version of > the product on the production LPAR and the test version of > the product on the test LPAR at the same time. There is a day > end process where data from the production system is updated > to the test system through a series of batch jobs. If there > is a potential issue with concurrent update attempts between > LPARs damaging the USS files, I want to find another way of > testing the product. > > Mike Myers
Mike, I've been looking at this recently. I'm still trying to get my head together around all the parts. Granted, probably not too difficult, once done and understood. As a possible alternative, if you are only going to do a small amount of sharing, without too much activity, then NFS over Hipersockets might be faster to implement. Then again, I may think so because I've implemented NFS myself and so it seems not too hard to do. As my Russian teacher would always say "Easy! Easy!", but then she was a Russian! <GRIN> -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
