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#uml IRC Logs for 2007-12-22

---Logopened Sat Dec 22 00:00:46 2007
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13:53<Magotari_-#uml->>caker: If this is not a secret, how many virtual machines you have running per host at once at maximum load? I'm coding some mconsole improvements, and I would love to know how big the n can get...
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20:11<fo0bar-#uml->>Magotari_: hmm, before the linode.com redesign, I believe it used to show the contention ratio on the specs page
20:11<fo0bar-#uml->>I don't see it anymore though
20:16<caker-#uml->>Magotari_: on production boxes, the max is 40 UMLs
20:17<caker-#uml->>but my guess is a machine could handle easily double or triple that if you have major resources and a very high throughput disk subsystem
20:21[~]fo0bar #uml just bought his first Core 2 Quad system for hosting UML :)#uml-> just bought his first Core 2 Quad system for hosting UML :)
20:22<fo0bar-#uml->>the spec is mostly for show though, since we only do 8:1 at work
20:22<caker-#uml->>our last couple sets of hosts were the core2 quad 65W versions ..
20:23<fo0bar-#uml->>previous hosts used plain old Pentium D servers
20:23<fo0bar-#uml->>caker: Q6700?
20:23<caker-#uml->>less power, twice the speed/cores, same price as the c2d ones were were using!
20:23<fo0bar-#uml->>oh, I thought you were still on Xeons
20:26<caker-#uml->>uh, yeah .. nevermind me
20:26<caker-#uml->>Xeon LV 5335 or something like that
20:26<tasaro-#uml->>L5335
20:26<caker-#uml->>tasaro: remember which ones we're using now?
20:26<caker-#uml->>thanks :)
20:27<fo0bar-#uml->>ahh
20:29<fo0bar-#uml->>of course, disk IO is still the main enemy... we've been using 4x RAID10 for that
20:30<fo0bar-#uml->>and the relatively new 3ware pci express cards
20:31<tasaro-#uml->>our main enemy is power consumption
20:31<fo0bar-#uml->>heh
20:31<fo0bar-#uml->>"1U" is the bane of the datacenter industry :)
20:31[~]fo0bar #uml remembers when the average server was 4-6U, and everyone was happy#uml-> remembers when the average server was 4-6U, and everyone was happy
20:34<fo0bar-#uml->>well, happy and ignorant
20:34<tasaro-#uml->>yeah, but 4U servers can still get 10 in a cabinet... if I could only get 10 on a 20A circuit
20:35<fo0bar-#uml->>well, "full density" racks back then usually came with two 20A. I imagine you probably need 4 or 5 if you wanted full density
20:35<fo0bar-#uml->>for 1Us that is
22:08<Magotari_-#uml->>caker: Ok, thanks. 40 might be too much to handle already, so I will want to find a better algo instead of sticking with original design.
22:08<Magotari_-#uml->>120 is out of the question with quadratic complexity.
22:39<Magotari_-#uml->>Can't sleep. Might as well code, while I have the ideas.
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---Logclosed Sun Dec 23 00:00:31 2007