Date: Mon, 25 Jan 2010 10:11:12 -0800 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: freebsd-stable@freebsd.org Subject: Re: 8.0-RELEASE/amd64 - full ZFS install - low read and write disk performance Message-ID: <20100125181112.GA20163@icarus.home.lan> In-Reply-To: <cf9b1ee01001251002x3ab0ecf6p1d8be5e31836320f@mail.gmail.com> References: <deb820501001250058ye0b798ayeccb2583a08558dd@mail.gmail.com> <E1NZN87-000JtL-Gy@dilbert.ticketswitch.com> <ed91d4a81001250904p1911f2d3y7250346387e69242@mail.gmail.com> <4B5DD7A2.4000101@FreeBSD.org> <cf9b1ee01001251002x3ab0ecf6p1d8be5e31836320f@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Jan 25, 2010 at 08:02:58PM +0200, Dan Naumov wrote: > On Mon, Jan 25, 2010 at 7:40 PM, Alexander Motin <mav@freebsd.org> wrote: > > Artem Belevich wrote: > >> aoc-sat2-mv8 was somewhat slower compared to ICH9 or LSI1068 > >> controllers when I tried it with 6 and 8 disks. > >> I think the problem is that MV8 only does 32K per transfer and that > >> does seem to matter when you have 8 drives hooked up to it. I don't > >> have hard numbers, but peak throughput of MV8 with 8-disk raidz2 was > >> noticeably lower than that of LSI1068 in the same configuration. Both > >> LSI1068 and MV2 were on the same PCI-X bus. It could be a driver > >> limitation. The driver for Marvel SATA controllers in NetBSD seems a > >> bit more advanced compared to what's in FreeBSD. > > > > I also wouldn't recommend to use Marvell 88SXx0xx controllers now. While > > potentially they are interesting, lack of documentation and numerous > > hardware bugs make existing FreeBSD driver very limited there. > > > >> I wish intel would make cheap multi-port PCIe SATA card based on their > >> AHCI controllers. > > > > Indeed. Intel on-board AHCI SATA controllers are fastest from all I have > > tested. Unluckily, they are not producing discrete versions. :( > > > > Now, if discrete solution is really needed, I would still recommend > > SiI3124, but with proper PCI-X 64bit/133MHz bus or built-in PCIe x8 > > bridge. They are fast and have good new siis driver. > > > >> On Mon, Jan 25, 2010 at 3:29 AM, Pete French > >> <petefrench@ticketswitch.com> wrote: > >>>> I like to use pci-x with aoc-sat2-mv8 cards or pci-e cards....that way you > >>>> get a lot more bandwidth.. > >>> I would goalong with that - I have precisely the same controller, with > >>> a pair of eSATA drives, running ZFS mirrored. But I get a nice 100 > >>> meg/second out of them if I try. My controller is, however on PCI-X, not > >>> PCI. It's a shame PCI-X appears to have gone the way of the dinosaur :-( > > > > -- > > Alexander Motin > > Alexander, since you seem to be experienced in the area, what do you > think of these 2 for use in a FreeBSD8 ZFS NAS: > > http://www.supermicro.com/products/motherboard/ATOM/ICH9/X7SPA.cfm?typ=H > http://www.supermicro.com/products/motherboard/ATOM/ICH9/X7SPA.cfm?typ=H&IPMI=Y Any of Supermicro's hardware with an ICH9 will be decent -- but you should remember that there's still a good portion of the I/O transactions which are CPU-bound. The Atom CPU isn't exactly an extensive workhorse. If/once you get one, let me know so I can steal you as a beta tester for getting X7SPA hardware monitoring (fans, external CPU temps, voltages) working in bsdhwmon. :-) -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20100125181112.GA20163>