On Fri, 20 Aug 2010 13:35:15 +0000, john gilmore <john_w_gilm...@msn.com> wrote:
>Mark Zelden wrote: > ><begin snippet> >Huh? 3 levels are supported and have been. At least for a short time before the older one goes unsupported (or if you pay for one of the extended support offerings). How would one ever get a new release into production via rolling IPLs if it weren't (ever hear of parallel sysplex and 24 x 7 availability)? Of course I'm kidding with that last comment, but perhaps you really didn't realize . . . ><end snippet> > >I did realize, and I am unrepentent. > >On the net it is now frequently appropriate to cite multiple authorities for an observation that the earth is an oblate spheroid, and I should thus perhaps have noted explicitly that appropriate sandbox-testing regimes must be in place; but I have recently been dismayed to observe (in more than one shop) the extent to which the new-release installation process has been gratuitously bureaucratized and greatly extended in time. Thoughtful processes conducted by competent sysprogs have been replaced by rule-bound, mechanically administered schemes excecutecd by clerks. > >Moreover, these new schemes have been ineffectual. Problems have not been eliminated or even reduced. (I have the impression that there are more problems, but I cannot prove this: my impression may be an artefact of their very slow, because also bureaucratized, diagnosis and resolution.) I'm not sure what your point is exactly here. Are you trying to say that testing in sandboxes or upgrading less critical production systems prior to the most critical ones as a way of testing has no value? > >In my judgment anyway, the presence of even two and certainly of three different levels of JES2 in the same MAS is 1) avoidable and 2) desirably avoided without compromising 24/7 availability, etc., etc. > Judgment has nothing to do with your statements. They are just plain wrong. 1) Only avoidable with a complete outage or if you are willing to upgrade all your sharing systems at the same time (which of course would be an outage). 2) Desired, perhaps, but impossible unless you know some way to upgrade the OS and JES2 on all systems simultaneously without an IPL. Some shops only get 1 or 2 opportunities a year to even do that. I'm not going to debate this any further after this post, but with all respect, you are completely off base and uniformed. IBM spends a lot of time, effort and dollars in making sure this platform can be upgraded non-disruptively by ensuring multiple releases can happily co-exist together in the same sysplex and that upgrades or major changes can be implemented with "rolling IPLs". Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS mailto:mzel...@flash.net Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- 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
