Date: Thu, 16 Aug 2007 17:55:50 +0200 From: =?ISO-8859-1?Q?Johan_Str=F6m?= <johan@stromnet.se> To: Martin Cracauer <cracauer@cons.org> Cc: freebsd-smp@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: Single Core2Duo Quadcore vs. two dualcore Xeon? Message-ID: <49E780C3-8AD7-4B59-96E7-FEAF05370E62@stromnet.se> In-Reply-To: <20070816152050.GA34616@cons.org> References: <7A201B4E-9B61-4074-93B9-42BD23B35AA9@stromnet.se> <20070815153800.GA28807@cons.org> <4835BBD0-5FA9-4DE3-A60D-B7D04628B229@stromnet.se> <20070816152050.GA34616@cons.org>
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On Aug 16, 2007, at 17:20 , Martin Cracauer wrote: > >> The Xeon Quad core just got a major price reduction though, so now >> I'm looking at a dual quad xeon (with 5320, 1.68Ghz or 5330 2.0GHz) >> instead... > > You still have to weight whether there is any application that you > need that is not multithreaded. Well the most load (at least from the current situation) will probably be mysql, and apache with mod_php. And that should be pretty multithreaded.. > >> The "default" mobo at the supplier (www.mullet.se) uses the X7DVL-i >> board, which takes 6 FB-DIMMs on two channels (max out at 16 gig).. > > That math doesn't play. Thats what the specs says.. 6 dimm sockets, altough it actually doesnt say anything about number of channels, that was from Mullets site. mobo spec says 16 gig max. > >> But I'm thinking about getting the upgrade mobo instead, X7BDE, with >> 8 slots on 4 channels with max 32GB (and also full KVM features in >> the IPMI slot..) >> >> But I'm curious if this kind of platform will ever be able to use all >> this? Disk access, memory bus & cpu etc.. lets asume I max this >> system in the future with 32 gigs of mem and 8 2ghz cores.. Will I >> ever be able to use that much with a raid5 (or 10, whats the lists >> opinion on this? 5 or 10?) config on a PCI-X slot? > > Much of ... what? > > I can't parse this sentence. Hehe.. I'll give it another try :) If I push the system to the max cpu/memory wise, will I ever make any use of 8cores each 2Ghz? Memory can always be used I guess.. > > For a pure fileserver all this is overkill. Oh yes, no this is not a fileserver. Mainly web hosting (combined mysql/php) > >> But realistically, for a php,mysql,apache,java etc machine with a >> number of jails, i wonder if I will ever be able to use this much >> power or if I should aim lower and if the box gets too loaded I'll >> get another one.. > > The moment php and Java are involved you are not strictly disk-bound > anymore :-) Very true.. It would be the mysql processes that would be limited. Johan
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