Date: Mon, 25 Jan 2010 20:02:58 +0200 From: Dan Naumov <dan.naumov@gmail.com> To: Alexander Motin <mav@freebsd.org> Cc: sub.mesa@gmail.com, freebsd-stable@freebsd.org, Pete French <petefrench@ticketswitch.com>, freebsd-questions@freebsd.org, freebsd-fs@freebsd.org, wonslung@gmail.com, bfriesen@simple.dallas.tx.us, Artem Belevich <fbsdlist@src.cx> Subject: Re: 8.0-RELEASE/amd64 - full ZFS install - low read and write disk performance Message-ID: <cf9b1ee01001251002x3ab0ecf6p1d8be5e31836320f@mail.gmail.com> In-Reply-To: <4B5DD7A2.4000101@FreeBSD.org> References: <deb820501001250058ye0b798ayeccb2583a08558dd@mail.gmail.com> <E1NZN87-000JtL-Gy@dilbert.ticketswitch.com> <ed91d4a81001250904p1911f2d3y7250346387e69242@mail.gmail.com> <4B5DD7A2.4000101@FreeBSD.org>
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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 - Sincerely, Dan Naumov
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