Date: Fri, 25 Dec 2009 12:03:30 +0100 From: Solon Lutz <solon@pyro.de> To: Thomas Burgess <wonslung@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS RaidZ2 with 24 drives? Message-ID: <1266543768.20091225120330@pyro.de> In-Reply-To: <deb820500912241646p7c8fd726n5c68895105e28907@mail.gmail.com> References: <568624531.20091215163420@pyro.de> <42952D86-6B4D-49A3-8E4F-7A1A53A954C2@spry.com> <957649379.20091216005253@pyro.de> <26F8D203-A923-47D3-9935-BE4BC6DA09B7@corp.spry.com> <1696529130.20091223212612@pyro.de> <op.u5gbvfgz8527sy@82-170-177-25.ip.telfort.nl> <deb820500912241646p7c8fd726n5c68895105e28907@mail.gmail.com>
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Guten Tag Thomas Burgess, Dear Thomas Burgess, am Freitag, 25. Dezember 2009 um 01:46 schrieben Sie: on Freitag, 25. Dezember 2009 at 01:46 you wrote: > On Thu, Dec 24, 2009 at 11:53 AM, Ronald Klop <ronald-freebsd8@klop.yi.org> wrote: > Isn't it write caching? > My Solaris machine at work also flushes the data every 30 seconds. > Ronald. > I think you are right. ZFS does work in bursts...it's very different than what most people expect. I know it was really weird to me when i first saw it. But my case isn't anywhere near of performance... According to iostat and gstat it reads and writes some data for 3-4 seconds and then sits there silently for another 10 and does absolutely nothing. Even when I'm doing single HD to single HD copy... Best regards, Solon
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