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To: Adam Vande More <amvandemore@gmail.com>
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Comments: In-reply-to Adam Vande More <amvandemore@gmail.com>
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Date: Tue, 08 Feb 2011 11:11:59 +0200
From: Daniel Braniss <danny@cs.huji.ac.il>
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Cc: freebsd-emulation@freebsd.org
Subject: Re: VirtualBox native iscsi initiator performance is bad 
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> Using the native Vbox iscsi initiator for very simple tests I'm getting
> slightly less than 20 MB/s write speed and VM takes a long time to boot
> because of DMA LBA errors are being reported on the iscsi/sata disk.
> 
> If I mount the iscsi on the host, I get close to 50 MB/s and then if I map
> that to a Virtualbox raw disk, and stick in a VM I get around 42 MB/s write
> speed.  I haven't done any tuning on iscsi target so perhaps that could
> improve things, but I'm concerned about the huge drop off in performance and
> reliability issues with the Vbox native version.  Does anyone have insight
> into this?
> 
> virtualbox-ose-3.2.12
> istgt-20110103
> 
> These are both recent 8-STABLE versions of Virtualbox.

have you measured the tcp/ip performance of the virtual box? last time I checked
it was not that good, remeber that iscsi is TCP based.

danny