Date: Thu, 12 Nov 2009 19:54:14 -0600 From: "James R. Van Artsdalen" <james-freebsd-current@jrv.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Help ZFS FreeBSD 8.0 RC2 Write performance issue Message-ID: <4AFCBC46.4010209@jrv.org> In-Reply-To: <9bbcef730911121328t342b2268oceba3712b52511d4@mail.gmail.com> References: <11167f520911111050j36dd94far667c81e6f5c18e69@mail.gmail.com> <20091111204903.GI89052@dan.emsphone.com> <11167f520911111326v13bb442bt36e853afbecdf834@mail.gmail.com> <9bbcef730911111352t12188bdajbca71bcf35a5beb5@mail.gmail.com> <Pine.GSO.4.63.0911121147310.9126@muncher.cs.uoguelph.ca> <11167f520911121044l74744c30u5a4d9ca008ab863c@mail.gmail.com> <d5992baf0911121048o76c1543el2b4d9de84ffb107@mail.gmail.com> <11167f520911121101o403751ddmb544dfaf1c61bf1e@mail.gmail.com> <ed91d4a80911121219sa0f3fa3s934791725028a966@mail.gmail.com> <d5992baf0911121314k7f535f2cra2d3e8367774d8ca@mail.gmail.com> <9bbcef730911121328t342b2268oceba3712b52511d4@mail.gmail.com>
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Ivan Voras wrote: > So in short, you are saying the to get "normal" performance out of > ZFS+NFS, the best way is to invest in an Areca and 2 SSDs :)) The Areca seems very sensitive to the disk drives used and I had to abandon it. It takes a day or so to get the card's firmware to sound the on-board siren no matter which disk drives I tried. And in any case a couple of Silicon Image 3124 host adapters with external port multipliers is much faster: the CAM/SIIS driver with such a setup easily sustains > 800 MB/s and would do better but for bus bandwidth issues I didn't bother addressing.
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