The reason back in the "old old days" the reason was primarily security... this was written back when REAL MEN only used real 3270's -- which had no LOCK function.
But even now it still serves a bit of a purpose ... it causes users to get a fresh 'ACCESS' to all their MDISKs. True, our MAINT 190 S-disk does not change often. And the Y-disk has been moved to SFS (with an exact shadow copy maintained on the MAINT 19E for servers that come up before that SFS server does). And it allows our overnight cross-volume MDISK compression code to move un-LINKed MDISKs around to create larger free disk space pools. But most importantly... it was hard to write (the local timezone support). As soon as I stop using it, someone will ask for it to be implemented again. So THERE! ;-)~ Mike Walter Hewitt Associates The opinions expressed herein are mine alone, not my employer's. "Les Koehler" <[email protected]> Sent by: "The IBM z/VM Operating System" <[email protected]> 09/24/2009 04:03 PM Please respond to "The IBM z/VM Operating System" <[email protected]> To [email protected] cc Subject Re: Where is the VM/CMS timeout value set In the 'old old days', I was once told that a long-time idle CMS user only occupied one 4k page of storage, so it was pointless to risk the damage to them from forcing them off. Have things changed? Or does your site have a very unusual workload? Les Mike Walter wrote: > To be a little more specific, z/VM does not provide such a service. But > at least one performance monitor provides exits to do what you wish. > > We use Velocity Software's ESAMON product to do exactly this, the TUNEFRC > EXEC provides the proper call. We've modified that a lot to manage > forcing users idle for 3+ hours between the time of 9PM and 5AM in their > own timezone - but that is a very site-dependent requirement. > > I'm not sure if other performance management products provide the same > sort of capability, but it would seem likely. Any z/VM site serious about > using z/VM needs a supported performance management product. > > Mike Walter > Hewitt Associates > The opinions expressed herein are mine alone, not my employer's. > > > > > > "Martin, Terry R. (CMS/CTR) (CTR)" <[email protected]> > > Sent by: "The IBM z/VM Operating System" <[email protected]> > 09/24/2009 08:16 AM > Please respond to > "The IBM z/VM Operating System" <[email protected]> > > > > To > [email protected] > cc > > Subject > Where is the VM/CMS timeout value set > > > > > > > Hi > > Where do you set the timeout value for an idle VM/CMS user for automatic > logoff? > > Thank You, > > Terry Martin > Lockheed Martin - Information Technology > z/OS & z/VM Systems - Performance and Tuning > Cell - 443 632-4191 > Work - 410 786-0386 > [email protected] > > WFH on Tuesdays and Fridays > > > > > > The information contained in this e-mail and any accompanying documents may contain information that is confidential or otherwise protected from disclosure. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply e-mail and then delete this message, including any attachments. Any dissemination, distribution or other use of the contents of this message by anyone other than the intended recipient is strictly prohibited. All messages sent to and from this e-mail address may be monitored as permitted by applicable law and regulations to ensure compliance with our internal policies and to protect our business. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by e-mail. > > The information contained in this e-mail and any accompanying documents may contain information that is confidential or otherwise protected from disclosure. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply e-mail and then delete this message, including any attachments. Any dissemination, distribution or other use of the contents of this message by anyone other than the intended recipient is strictly prohibited. All messages sent to and from this e-mail address may be monitored as permitted by applicable law and regulations to ensure compliance with our internal policies and to protect our business. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by e-mail.
