Date: Tue, 16 Dec 2008 23:02:13 +0100 From: Bernard Dugas <bernard@dugas-family.org> To: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> Cc: freebsd-questions@freebsd.org Subject: Re: Extracting changed files list from snapshot Message-ID: <49482565.1070107@dugas-family.org> In-Reply-To: <44k59zg8mz.fsf@be-well.ilk.org> References: <4947B8AB.7000304@dugas-family.org> <44k59zg8mz.fsf@be-well.ilk.org>
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Lowell Gilbert wrote: > Bernard Dugas <bernard@dugas-family.org> writes: > >>I want to extract the list of files changed between 2 snapshots, to be >>able to do efficient backups. >> >>Any idea where to find a document about snapshots internal structure ? >> >>Or if you know any port that already do this :-? > > An easier way would be to generate an mtree(1) description for each > snapshot, and using that to compare against other snapshots. You have > to mount the snapshot for that, though... Thanks for your answer, sorry not to be clear on the goal : find the changed files without having to read the whole LARGE disk. By definition, snapshot files have internally the list of block changed. So i would like to have a description of the internal structure of a snapshot file and a way to find the file by which any changed block is owned. Best regards, -- Bernard DUGAS Mobile +33 615 333 770
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