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From: Josh Paetzel <josh@tcbug.org>
To: Ivan Voras <ivoras@freebsd.org>
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Cc: freebsd-performance@freebsd.org, Antony Mawer <fbsd-performance@mawer.org>
Subject: Re: FreeBSD 7.1 disk performance issue on ESXi 3.5
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On Feb 11, 2009, at 1:02 PM, Ivan Voras wrote:

<snip>
>
>
> As previously demonstrated by me and others, Linux usually has
> significantly better file system performance in the non-virtualized
> case, so the difference could be simply increased by the
> virtualization.


In my limited experience with VMWare linux seems to have near bare  
metal disk performance.  FreeBSD seems to incur a significant  
performance penalty.  For instance on my laptop, running OSX and  
VMWare Fusion, FreeBSd virtual machines can't saturate 100TX off the  
disk, raw dd manages about 7 Megs/sec, which is in line with what I  
get shovelling big files around.   Disk is a 7200 RPM SATA2.

Thanks,

Josh Paetzel