On Tue, 20 Dec 2011 12:32:40 +0100 (CET), you wrote:

>Hi,
>I was wandering if there is any way to permanently delete a file from one or 
>more snapshots.
>It may happen the need to delete a very big file from the file system, and 
>realize that the
>available space is still the same, because some snapshots are still holding 
>the file.
>Any clue?
>Gabriele.

Perhaps:
* zfs clone snapshot
* zfs promote the clone
* rm the big file from the clone
* zfs destroy the snapshot
* repeat for every snapshot that contains the big file
(untested)


-- 
Regards,

Kees Nuyt


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