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Date:      Tue, 15 Feb 2011 16:09:19 +0100
From:      Ollivier Robert <roberto@keltia.freenix.fr>
To:        freebsd-stable@freebsd.org
Subject:   Re: 8.1 amd64 lockup (maybe zfs or disk related)
Message-ID:  <20110215150919.GC12068@roberto-al.eurocontrol.fr>
In-Reply-To: <16407D66-5303-4FF1-85D1-9372B4135C5A@punkt.de>
References:  <1297026074.23922.8.camel@ubuntu> <20110207045501.GA15568@icarus.home.lan> <1297065041.754.12.camel@ubuntu> <20110207085537.GA20545@icarus.home.lan> <6E948342-DEFF-4DEB-B0DC-990B647549EB@punkt.de> <AANLkTinqVpusdH8gQhvxC8raZUFD08GXgTKiLnAhCtjW@mail.gmail.com> <16407D66-5303-4FF1-85D1-9372B4135C5A@punkt.de>

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According to Patrick M. Hausen:
> And with the very same settings on our bigger backup box I really need to
> improve performance somehow. We are backing up >50 hosts nightly with
> Amanda. I got from this post that I definitely should increase memory on
> this machine:

The rule of thumb I saw on the opensolaris lists back a year or two was that you need approx. one GB of RAM per TB of data.  Now, if you have a high I/O rate, the more you have is better.

-- 
Ollivier ROBERT -=- FreeBSD: The Power to Serve! -=- roberto@keltia.net
In memoriam to Ondine, our 2nd child: http://ondine.keltia.net/




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