Date: Mon, 6 Feb 2012 18:47:53 +0100 From: =?iso-8859-1?Q?Peter_Ankerst=E5l?= <peter@pean.org> To: Michael Aronsen <michael.aronsen@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: HPC and zfs. Message-ID: <ACD2212B-7B3B-488E-AEFF-52A2CE9ABBC6@pean.org> In-Reply-To: <AB8B3E3A-1161-4855-B418-B37E16D0EC52@gmail.com> References: <4F2FF72B.6000509@pean.org> <20120206162206.GA541@icarus.home.lan> <AB8B3E3A-1161-4855-B418-B37E16D0EC52@gmail.com>
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On 6 feb 2012, at 17:49, Michael Aronsen wrote: > Hi, > > On Feb 6, 2012, at 17:22 , Jeremy Chadwick wrote: >> - What single motherboard supports up to 192GB of RAM > > Get an HP DL580/585 - they support 2TB/1TB RAM. > >> - How you plan on getting roughly 410 hard disks (or 422 assuming >> an additional 12 SSDs) hooked up to a single machine > > Use LSI SAS92XX 4 (x4) port external controllers, and SuperMicro SC847E26-RJBOD1 disk shelves. > Each disk shelf needs 2 ports on the LSI controller, which means you get 90 disks per LSI card. > The DL580/585's have 11 PCIe slots, so you'd end up with 990 disks per server using this setup. > >> > > We have NetApp's at our University for home storage, but I would struggle to recommend them for HPC storage. > > A dedicated HPC filesystem such as Lustre or FhGFS (http://www.fhgfs.com/cms/) will almost certainly give you better performance as they're purpose made. > > We use FhGFS in a rather small setup (44 TB usable space and ~200 HPC nodes), but they do have installations with 700TB+. > The setup consists of 2 metadata nodes and 4 storage nodes, all supermicro servers with 24 WD Velociraptor 600 GB 10K RPM disks. > This setup gives us 4.8GB/sec write and 4.3GB/sec read speeds, all for a lot less than a comparable NetApp solution (we paid around €30.000). > It now has support for mirroring on a per folder level for resilience. > > Currently it only runs on Linux but i'm considering a FreeBSD port to get ZFS for volume management and now that OFED is in FreeBSD 9, Infinifband is possible. > > I'd highly recommend a parallel filesystem, unfortunately not many, if any, are available on FreeBSD at this time. > Thanks for the input. We recently had a visit by NetApp and Whamcloud actually and they where pitching for a NetApp+Whamcloud(lustre) installation.
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