Date: Fri, 1 Jun 2012 18:24:31 +0200 From: Albert Shih <Albert.Shih@obspm.fr> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: freebsd-questions@freebsd.org, Oscar Hodgson <oscar.hodgson@gmail.com> Subject: Re: Anyone using freebsd ZFS for large storage servers? Message-ID: <20120601162431.GA44290@pcjas.obspm.fr> In-Reply-To: <alpine.BSF.2.00.1206011812120.4297@wojtek.tensor.gdynia.pl> References: <CACxnZKM__Lt9LMabyUC_HOCg2zsMT=3bpqwVrGj16py1A=qffg@mail.gmail.com> <20120601052309.GA32942@pcjas.obspm.fr> <CACxnZKM=5QXu29qmEd3FWmpQMeM7MuOPN7a_VwrM=Q_M-4uMUg@mail.gmail.com> <alpine.BSF.2.00.1206011812120.4297@wojtek.tensor.gdynia.pl>
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Le 01/06/2012 ? 18:17:38+0200, Wojciech Puchar a écrit > > i dare not to agree about "very fast". very fast is relative term. how did > you configured your storage? > > trivial test: > > make 10 100GB files (so none fits in RAM) by > > for x in 0 1 2 3 4 5 6 7 8 9;do ( dd if=/dev/zero of=testfile$x bs=1m > count=100k &) ;done > > measure time needed for it to finish (all dd processes exist) > > then install /usr/ports/benchmark/randomio and do some tests of random > reads on that files. > > and final test - 10 randomio in parallel with 10 threads each, one per > every file. > > then sum up results (IOPS) and divide by amount of disks you have. > > then decide if is it fast or slow :) When I say fast that's mean I already do some benchmarks with iozone. And do some graphs to see what the performance are. What I can say is it's go lot faster than H700+ 12 disk 600 15k/min. And I do those tests on FreeBSD with 12 disk, 24 disk, 36 disk and finaly 48 disk. All I can say is ZFS go faster than 12 disk with H700 (and ext3) almost every time. If you like I can privalty send you the url of those graph. Just ask me, > >> Eat lot of Ram > > can be controlled by settings in loader.conf. Yes, but I think that's not a good idea to buy a server with 4 Go and make him manage 100To through ZFS.... Regards. JAS -- Albert SHIH DIO bâtiment 15 Observatoire de Paris 5 Place Jules Janssen 92195 Meudon Cedex Téléphone : 01 45 07 76 26/06 86 69 95 71 xmpp: jas@jabber.obspm.fr Heure local/Local time: ven 1 jui 2012 18:18:55 CEST
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