> But you can clean it up first! Use Sir Rob's wonderful cmmflush...
That's good to know. Thanks Marcy, Rob.
I wonder if there is still time to get that into the next "Virtualization
Cookbook"?
-Mike M.
On Fri, May 29, 2015 at 6:09 PM, Marcy Cortes <[email protected]
> wrote:
> All memory so yes, all the baggage, cache, etc.
>
> But you can clean it up first! Use Sir Rob's wonderful cmmflush
> We clean up hundreds of dev servers every night and it has saved real $
>
>
> https://zvmperf.wordpress.com/2012/07/06/using-cmm-to-flush-a-linux-guests-memory/
> https://zvmperf.wordpress.com/2015/02/11/user-experience-with-cmmflush/
>
> Marcy
>
> -----Original Message-----
> From: Linux on 390 Port [mailto:[email protected]] On Behalf Of
> Graham Harris
> Sent: Friday, May 29, 2015 3:03 PM
> To: [email protected]
> Subject: Re: [LINUX-390] Are weekly z/VM IPLs necessary?
>
> Dumb question: Is live guest relocation of a z/Linux guest effectively a
> reboot of that guest, or does it transfer all the baggage that has
> accumulated over the life of the guest?
>
> On 28 May 2015 at 23:48, Mike Walter <[email protected]> wrote:
>
> > Enter the Wayback Machine for trip to 1996 by visiting:
> >
> >
> > http://listserv.uark.edu/cgi-bin/wa?A2=ind9610&L=IBMVM&P=R1016&1=IBMVM
> > &9=A&I=-3&J=on&X=D2B166CA66E8CA0104&Y=Mike.Walter%40aon.com&d=No+Match
> > %3BMatch%3BMatches&z=4
> >
> > (watch out for URL line breaks of that link).
> >
> > That post was written before Linux ran on any IBM mainframes, and it
> > addresses some CMS application issues, but some parts (e.g. 'other
> > systems', and accumulated changes affecting the next IPL) still apply.
> > While you're there, search for other posts on that thread...
> > interesting and enlightening reading.
> >
> > While z/VM can shutdown and restart at astonishingly speed (well under
> > 10 minutes), large Linux servers can take much longer -- making the
> > business case for more frequent IPLs a more difficult decision. But
> > one must balance weekly IPLs against the potential for the extended
> > recovery time which may (place your bets) be required to recover from
> > those changes which have accumulated since the last IPL, and may
> detrimentally affect the next
> > IPL. Provide your management with as many facts as you can find, and
> your
> > advice, then let them make a decision -- that's why they get paid the
> > big bucks, right?
> >
> > Mike Walter
> > Aon Service Corporation
> > The opinions expressed herein are mine alone, not necessarily those of
> > my employer.
> >
> > ------------------------------
> > In response to:
> >
> > ------------------------------
> >
> >
> >
> > Date: Wed, 27 May 2015 14:33:41 +0000
> >
> > From: "Will, Chris" <[email protected]<mailto:[email protected]>>
> >
> > Subject: Are weekly z/VM IPLs necessary?
> >
> >
> >
> > We have gotten in the habit of IPLing our z/VM and zLinux guests every
> > =
> >
> > Sunday during our standalone window. With the window shrinking and
> > the =
> >
> > need for 24/7 availability is it really necessary to IPL every week?
> > If =
> >
> > not what potential problems could we run into by not doing the IPL
> > (memory =
> >
> > leaks, logs filling etc.). This is in comparison to the Intel side of
> > the =
> >
> > shop (Red Hat, Windows) where they go months between IPLs. The only =
> >
> > benefit I see is the opportunity to recycle WMB execution groups.
> >
> >
> >
> > Chris Will
> >
> >
> >
> >
> >
> >
> >
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> >
> >
> > ----------------------------------------------------------------------
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