Again, the weights have nothing to do with capping. But to answer your question: yes.
Now, be careful. If LPAR 2 is hard capped at 200 MSU and is using 200 MSU, then SDSF will report 100% CPU utilization. In your scenario, you could hard cap LPAR 2 at 200 MSU and set the weights to 90/10. LPAR 2 could then use up to 200 MSU, but would be given no less than 100 MSU if LPAR 1 is active. LPAR 1 could use all 1000 MSU if LPAR 2 is idle, or no less than 900 MSU if LPAR 2 is active. Perhaps your business may be better served with a 20 MSU cap and weights 0f 95/5. That is, LPAR 2 could never use more than 20 MSU, but LPAR 1 could take 950 MSU if needed. Again, LPAR 1 could take all 1000 MSU if LPAR 2 is idle. HTH and good luck -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Tommy Tsui Sent: Wednesday, February 10, 2010 9:34 AM To: IBM-MAIN@bama.ua.edu Subject: Re: cpu capping question Hi Merritt, If LPAR1 (our production) is not capped but LPAR 2 (development) is active (assume the weight=20% or 200 mips, it only utilize 100 mips at night), Can LPAR1 utilize 900 mips at night ??? 2010/2/10 Hal Merritt <hmerr...@jackhenry.com>: > LPAR1 is not capped. It can take 100% of the CPU if LPAR 2 is idle and it > needs it. If LPAR 2 is active, then LPAR 1 can take up to 80% and LPAR 2 20%. > If LPAR 1 is idle, then LPAR 2 can take up to the hard cap value. > > You did not mention the capping value for LPAR2. If, for example, you have > hard capped LPAR 2 at, say, 150 mips, then it can never take more than that. > So, LPAR 1 could take 85% and LPAR 2 15% if both are competing for the CPU. > > I assume you really meant to say MSU's instead of MIPS. MIPS is not a valid > metric in this context. > > Hard cap, soft cap, and weights are all different controls, but all three > need be considered to manage your machine. > > HTH and good luck. > > > > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf > Of Tommy Tsui > Sent: Wednesday, February 10, 2010 8:59 AM > To: IBM-MAIN@bama.ua.edu > Subject: cpu capping question > > Hi all, > I have following question on CPU hard capping > LPAR1 initial capping=No CPU weight 80 = 800mips > LPAR2 initial capping=Yes CPU weight 20 = 200mips > assume CPU has 1000mips > > my question is, for LPAR2 the maximum CPU utilization is 200 mips with > hard capping but how about LPAR1? the maximum CPU utilization is > 800mips or more than 800mips with initial capping=no? > I knew that soft capping is more suitable for this case with defined > capacity & weight. > > any help will be appreciated > > NOTICE: This electronic mail message and any files transmitted with it are > intended > exclusively for the individual or entity to which it is addressed. The > message, > together with any attachment, may contain confidential and/or privileged > information. > Any unauthorized review, use, printing, saving, copying, disclosure or > distribution > is strictly prohibited. If you have received this message in error, please > immediately advise the sender by reply email and delete all copies. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
