On Tue, 23 Sep 2008 12:22:27 +0200, Flemming Sigvardt <[EMAIL PROTECTED]> wrote:
>Hi. > >I'm working with migrating a customer to z9 hardware, and when it comes to >the PR/SM setup I have a few questions, which pops up from time to time I >believe. > >When it comes to assignning Logical Processor to an LPAR, do we still have >a ROT of 2:1 ratio between Logical and Physical Processors on the CEC, - >or has the PR/SM overhead been minimized over time. > >Another thing : >Way back we didn't assign just 1 LP to an LPAR regardless of how small the >LPAR was, - to come around the problems arising with looping applications >on an LPAR with just 1 LP. >But we are discussing whether or not it's appropriate with z9 to assign 2 >LP to a small Capacity LPAR, and keep the utilization of these under - say >3%. > >Any comments on these issues would be appriciated. >Thanks in advance > There are plenty of comments and advise in the archives. Here is a post from mine on the subject from about a year ago - Oct. 2007: Subject: Logical to Physical CPU ratio ROT http://bama.ua.edu/cgi-bin/wa?A2=ind0710&L=ibm-main&D=1&O=D&P=75308 -- 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 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
