Date: Mon, 25 Jan 2010 10:53:24 -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: <20100125185324.GA21007@icarus.home.lan> In-Reply-To: <cf9b1ee01001251039v5560eb36p31ba5930abeb8155@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> <4B5DE3C1.4060508@FreeBSD.org> <cf9b1ee01001251039v5560eb36p31ba5930abeb8155@mail.gmail.com>
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On Mon, Jan 25, 2010 at 08:39:01PM +0200, Dan Naumov wrote: > On Mon, Jan 25, 2010 at 8:32 PM, Alexander Motin <mav@freebsd.org> wrote: > > Dan Naumov wrote: > >> 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 > > > > Unluckily I haven't yet touched Atom family close yet, so I can't say > > about it's performance. But higher desktop level (even bit old) ICH9R > > chipset there is IMHO a good option. It is MUCH better then ICH7, often > > used with previous Atoms. If I had nice small Mini-ITX case with 6 drive > > bays, I would definitely look for some board like that to build home > > storage. > > > > -- > > Alexander Motin > > CPU-performance-wise, I am not really worried. The current system is > an Atom 330 and even that is a bit overkill for what I do with it and > from what I am seeing, the new Atom D510 used on those boards is a > tiny bit faster. What I want and care about for this system are > reliability, stability, low power use, quietness and fast disk > read/write speeds. I've been hearing some praise of ICH9R and 6 native > SATA ports should be enough for my needs. AFAIK, the Intel 82574L > network cards included on those are also very well supported? That's just the thing -- I/O transactions, not to mention ZFS itself, are CPU-bound. If you start seeing slow I/O as a result of the Atom's limitations, I don't think there's anything that can be done about it. Choose wisely. :-) WRT the Intel 82574 series: em(4) supports this, just please be sure to run RELENG_8 as there's been em(4) fixes and improvements which RELEASE doesn't have. http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/e1000/ If you have issues with the NIC(s), Jack Vogel at Intel can be of great assistance. :-) -- | 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 |
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