As has been already pointed out, usage during normal processing is minimal, but perhaps the most critical sizing point is the cycles used during a freeze. Insufficient weighting given to the K LPAR (and/or the ANTMAIN/ANTAS* tasks set too low) may elongate the freeze time.
This would be rather important (unless you are doing freeze and stop) as all volumes are locked out until the suspends are issued and the long busy is released. Usage will be based on number of LCUs and devices but should be tested and measured. Best regards, John On Tue, 23 Dec 2008 20:07:38 +0100, John Ticic IBM-MAIN <ibm- [email protected]> wrote: >Bob's estimate sounds about right. The control LPARs don't burn many CPU cycles. There will be a peak (or multiple peaks - depending) during the day when the status of the DASD is checked. Depending on how many devices you have, it is probably a good idea to plan this task for a quiet time. I really can't remember the numbers, but it was noticeable. > >Getting technical information is a little bit difficult. Once you've signed up with IBM for GDPS, you can get the technical documentation, and there is a lot of good stuff in there. > >You can probably tap into some good user information at Share (or visit the Web site and look for presentations). > >Regards > >John > > >-- cut -- >Based on previous experience I had with a z9 EC one-way and a two-way, >about 10-15% of one CP on average. YMMV > >If by cost you mean MSUs, that also was minimal. I seem to remember 5-8 >MSUs being consumed. Again, YMMV according to how your shop has >negotiated your software licenses. > >Bob > >-----Original Message----- > >Does anybody know what are the CPU cost to implement GDPS (for the >control >LPARs)? How much CPU usage we should expect on top of our existing CPU >usage? This is assuming we already have both parallel sysplex >implemented in >both primary and secondary site in place. What other cost/overhead we >should >expect aside from higher CPU and CF usage? Any good reference material? >TIA. > >Regards, >Jason > > >John Ticic >IntelliMagic - Storage Intelligence >Perzikweg 13a, 2321 DG Leiden, The Netherlands >www.intellimagic.net > >---------------------------------------------------------------------- >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 ---------------------------------------------------------------------- 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
