I think only the big user who has a sysplex can really keep up something running all the time. You can do rolling IPLs on an MVS sysplex, and install maintenance or a new release of the operating system without shutting the whole sysplex down. Of course us having an MP3000, I have no real experience with this.
I did VM for several years until we got rid of it, and yes, I agree, you have to IPL for a lot of changes. Eric Bielefeld Sr. MVS Systems Programmer P&H Mining Equipment Milwaukee, WI 414-671-7849 [EMAIL PROTECTED] >>> [EMAIL PROTECTED] 03/17/03 03:35PM >>> I agree. The writer is wrong. There is plenty of code, even with z/OS V1.4, which cannot be 'swapped into place', on a running system. ..thanks Steve Gentry wrote: > > The writer made the comment that : > <snip> > > Well, IBM (NYSE: IBM - news) mainframes as old as the original System 370, which > debuted in 1970, had > the ability to create what are called virtual machines, which allow one > version of the operating system to keep running while a kind of duplicate > copy running on the same physical machine is upgraded. Once a fix is made > to code, the patched version of the OS can be swapped into place for the > running version, all without taking down the system. > > </snip> > > Further . . . > > "Once a fix is made to the code, the patched version of the OS can be > swapped into place . . . without taking down the system" > +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ This electronic mail transmission contains information from P & H Mining Equipment which is confidential, and is intended only for the use of the proper addressee. If you are not the intended recipient, please notify us immediately at the return address on this transmission, or by telephone at (414) 671-4400, and delete this message and any attachments from your system. Unauthorized use, copying, disclosing, distributing, or taking any action in reliance on the contents of this transmission is strictly prohibited and may be unlawful. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
