Date: Mon, 25 Jan 2010 09:04:00 -0800 From: Artem Belevich <fbsdlist@src.cx> To: Pete French <petefrench@ticketswitch.com> Cc: sub.mesa@gmail.com, freebsd-stable@freebsd.org, mav@freebsd.org, dan.naumov@gmail.com, freebsd-fs@freebsd.org, wonslung@gmail.com, bfriesen@simple.dallas.tx.us, freebsd-questions@freebsd.org Subject: Re: 8.0-RELEASE/amd64 - full ZFS install - low read and write disk performance Message-ID: <ed91d4a81001250904p1911f2d3y7250346387e69242@mail.gmail.com> In-Reply-To: <E1NZN87-000JtL-Gy@dilbert.ticketswitch.com> References: <deb820501001250058ye0b798ayeccb2583a08558dd@mail.gmail.com> <E1NZN87-000JtL-Gy@dilbert.ticketswitch.com>
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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 wish intel would make cheap multi-port PCIe SATA card based on their AHCI controllers. --Artem 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 :-( > > -pete. > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
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