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Re: [rdiff-backup-users] [PATCH] Sparse file support

From: Jakob Unterwurzacher
Subject: Re: [rdiff-backup-users] [PATCH] Sparse file support
Date: Tue, 04 Jan 2011 17:03:23 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20101027 Thunderbird/3.1.6

Am 04.01.2011 16:33, schrieb Dominic Raferd:
> So I guess it is forward-compatible, but not backward-compatible?
> Existing repositories can be read fine with rdiff-backup patched for
> sparse file support, but repositories created with sparse file support
> cannot be read by unpatched rdiff-backup.

Looking at the patch, it only changes the way blocks of zeroes are
written to disk - they are "written" as holes in the files instead.
As sparse file are completely transparent to user-space so there should
be no compatability issues whatsoever!


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