APC has a selector tools on their website that takes the parameters of your system and tells you what model you need. Not sure how accurate it is, but it's probably fairly close considering how many things you need to enter. Geoff Sent from my BlackBerry wireless handheld. -----Original Message----- From: "Robert Moskowitz" <rgm at htt-consult.com> Date: Fri, 3 Aug 2007 16:29:00 To:CentOS mailing list <centos at centos.org> Subject: Re: [CentOS] Power burn test Timothy Selivanow wrote: > On Fri, 2007-08-03 at 15:01 -0400, Robert Moskowitz wrote: > >> I need a program that will just run everything at max so I can measure >> the max power used on some systems. My 'Kill a Watt' meter should show >> up early next week. >> >> SO run that CPU at max, using all memory, and keeping the harddrive >> spinning. >> >> I can jsut do pings on the lan card for it to stay awake. >> >> I have searched here and on the net and have come back with nothing. >> >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > Are you wanting max power for provisioning purposes? If so, the max > power on the power supply or chassis will give you absolute max. 80% of > that number is what it is rated for on a continuous basis, 100% is for > max burst. > No for UPS purposes. Actually some of these are 'portable' and I want to size an external battery. I will be running a number of tests. Max, min, 'typical'. > If you need a more accurate number (as the above is the rated Wattage, > which /will/ be different than actual usage for safety purposes), you > could run multiple of something like this: `dd if=/dev/urandom > of={somefile} bs=1024k count=1024`. Depending on your processor speed, > that won't keep the disks busy all the time which is why I suggested > multiple running at the same time. What that will do is pull 1GB worth > of random data (stresses CPU) and writes it as fast as possible to the > disk. Running a few of those in a loop should give you enough time to > see actual power draw. Shifting bits around in the memory register > probably won't add too much power draw, as it is mostly CPU and chipset > (just CPU if you are using AMD). The RAM stick is fully powered > regardless. > > Hope that helps at least a little. _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos