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Date:      Mon, 17 Nov 2014 16:42:20 -0500
From:      J David <j.david.lists@gmail.com>
To:        Mark Schouten <mark@tuxis.nl>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>
Subject:   Re: Slow nfsd write performance, tweaks needed
Message-ID:  <CABXB=RRqK7iuVh8rr3u1ShdVJN=7WmShnJJiP-46vO7ZgHhBLw@mail.gmail.com>
In-Reply-To: <3176881007-17726@kerio.tuxis.nl>
References:  <2826701214-10966@kerio.tuxis.nl> <3176881007-17726@kerio.tuxis.nl>

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On Mon, Nov 17, 2014 at 6:08 AM, Mark Schouten <mark@tuxis.nl> wrote:
> Thanks for all your responses. I've setup a testserver to do some benchmarks, here are the results. Things are tested from inside a VM, that runs inside a Proxmox-VM, that runs on my Desktop (that performs pretty good, BTW :))

One thing that might also affect your performance testing is that
FreeBSD disk I/O under KVM -- which is what Proxmox uses to run
FreeBSD -- has historically been pretty terrible, especially with ZFS.
The reasons for this are understood, I think, but last I heard the
author of the virtio block driver was time-constrained and hadn't had
a chance to work on it.

Thanks!



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