On Tue, 2006-04-18 at 21:17 +0200, Marian Gasparovic wrote: > I am not sure if I understand you correctly, what will be you final config ? > Three LPARs with z/OS + one LPAR as CF ? And all sharing three CPUs ? Nobody > can tell you what it will lok like as we don't know what is your current > utilization of CPUs
I can - it'll be awful. Especially if the machine is anywhere near (CPU) committed. The more LPARs, the worse the PR/SM dispatch interference. I run a similar config at one customer, and use the CF only for LOGREC and GRS Star. The Star response times are between one and 2 orders of magnitude worse than what I would expect from placing the structure in an ICF. Yes, *at least* 10 times worse. May, or may not, be indicative, but I have forbidden the DBAs even considering data-sharing. They concurred. Plans are in the final stages to remove the CF, and go back to a ring (of monoplexes). The M??(?) thingies can be better used elsewhere. Shane ... ---------------------------------------------------------------------- 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
