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Date:      Mon, 25 May 2009 18:47:10 +0100
From:      "Graeme Dargie" <arab@tangerine-army.co.uk>
To:        "Wojciech Puchar" <wojtek@wojtek.tensor.gdynia.pl>, <FreeBSD-Questions@freebsd.org>
Cc:        Howard Jones <howard.jones@network-i.net>, Valentin Bud <valentin.bud@gmail.com>
Subject:   RE: FreeBSD & Software RAID
Message-ID:  <01FB8F39BAD0BD49A6D0DA8F7897392956CB@Mercury.galaxy.lan.lcl>
In-Reply-To: <alpine.BSF.2.00.0905251907460.39949@wojtek.tensor.gdynia.pl>

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-----Original Message-----
From: Wojciech Puchar [mailto:wojtek@wojtek.tensor.gdynia.pl]=20
Sent: 25 May 2009 18:09
To: FreeBSD-Questions@freebsd.org
Cc: Howard Jones; Graeme Dargie; Valentin Bud
Subject: Re: FreeBSD & Software RAID

>
> I have looked at ZFS recently. Appears to be a memory hog, needs about
1
> GB especially if large file transfers may occur over gigabit ethernet
while it CAN be set up on 256MB machine with a little big flags in=20
loader.conf (should be autotuned anyway) - it generally takes as much=20
memory as it's available, and LOTS of CPU power.

with similar operations ZFS takes 10-20 TIMES more CPU than UFS and it's

NOT faster than properly configured UFS. doesn't  make  any sense
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Ok granted this is a server sat in my house and it is not a "mission"
critical server in a large business, personally I have can live with ZFS
taking a bit longer vs resilience. From just looking at my system at the
moment I have 1.8GB of free ram from a total of 4GB.


Regards=20

Graeme




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