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From: Lutz Vieweg <lvml@5t9.de>
To: linux-btrfs@vger.kernel.org
Subject: Can I get a checksum for a file from btrfs (without reading the whole file)?
Date: Thu, 05 Feb 2015 11:40:10 +0100	[thread overview]
Message-ID: <mavhab$f8m$1@ger.gmane.org> (raw)

Hi,

use case: You have two huge files on a btrfs, you assume they contain the same bytes,
but you do not know for sure.

Is there a way to get a checksum of both files from btrfs with less effort than
reading the whole of both files and computing a hash sum?

(I was thinking that the btrfs-internal CRCs might be of use, here...)

Regards,

Lutz Vieweg


             reply	other threads:[~2015-02-05 10:40 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-05 10:40 Lutz Vieweg [this message]
2015-02-06  5:20 ` Can I get a checksum for a file from btrfs (without reading the whole file)? Qu Wenruo
2015-02-06 13:00   ` Lutz Vieweg
2015-02-06 18:04     ` David Sterba

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