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Date: Wed, 24 Jun 2009 22:12:38 +0200
From: Mark Ruijter <mruijter@gmail.com>
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Subject: Re: [linux-lvm] Data deduplication for Linux : lessfs
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> Block level deduplication isn't going to know/care about the
> difference between file contents and metadata.  It is either stored in
> blocks that match other blocks or not and the difference should not be
> visible to the filesystem living on top of the block device.
>
Exactly. And this is why lessfs can easily write files with speeds up to
200MB~300MB/sec on modern hardware.

Mark.