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Date: Tue, 08 Jul 2008 22:38:10 +0200
From: Kris Kennaway <kris@FreeBSD.org>
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To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Cc: John Nielsen <lists@jnielsen.net>, freebsd-questions@freebsd.org
Subject: Re: FreeBSD + ZFS on a production server?
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Wojciech Puchar wrote:

> ZFS can be installed on partitions and share disks with other things, 
> but the performance will be bad.

There is nothing ZFS-specific about this statement.

> ZFS - contrary to every other filesystem that use FreeBSD disk I/O 
> scheduler - does it's own I/O scheduling, so it assumes it's the only 
> user of physical drive.

This is false.  ZFS uses GEOM along with everything else in FreeBSD, and 
GEOM is the thing that eventually talks to the disk driver to perform I/O.

Kris