On Wed, 5 Sep 2007 11:26:56 -0700, Skip Robinson <[EMAIL PROTECTED]> wrote:
> A sysplex cold start is fraught with peril under the rosiest of circumstances. Obviously if you require 24 x 7 availability for applications, then you don't want (or schedule) a sysplex wide IPL. I'm also not advocating it to all as a "best practice" even if you have the opportunity to do it. I was offering a another point of view (and a personal preference). So if availability isn't holding you back, the risks of regressing dynamic changes can be reduced by IPLing more often. The Pros/Cons of this are discussed in this redbook: z/OS Planned Outage Avoidance Checklist http://www.redbooks.ibm.com/abstracts/sg247328.html?Open Do you run into problems with IPLs of single systems due to dynamic changes being regressed? There is no inherent danger in doing a sysplex wide IPL and I would say that to be as "afraid" of them as you appear to be, then perhaps the problem may be with change control procedures - not with doing a sysplex wide IPL. BTW, the example I cited was the only one I could think of in my 5 years here, but the timing was perfect since it just happened. It would have been better had it happened during a planned sysplex outage (which would have been in few weeks anyway). I have seen the same issue with single system IPLs though (I'm sure many of the subscribers have seen the occasional dynamic APF library gone after an IPL). I guess you have a war story of your own or you wouldn't have such strong feelings. :-) Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- 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
