Date: Tue, 14 Jul 2015 05:00:23 -0500 From: "Matthew D. Fuller" <fullermd@over-yonder.net> To: accounts-ag <accounts-ag@netlabs.org> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS volume does not seem to free space for deleted files Message-ID: <20150714100023.GC96394@over-yonder.net> In-Reply-To: <55A4DB1D.7000404@netlabs.org> References: <55A4DB1D.7000404@netlabs.org>
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On Tue, Jul 14, 2015 at 11:49:17AM +0200 I heard the voice of accounts-ag, and lo! it spake thus: > > So according to my calculation it is using less than 20GB of space > for snapshots. Which does not make much sense to me as I clearly do > expect the deleted files to show up somewhere (I did it on > 2015-07-13). So how can the big difference to USED be explained > which reports 116G in total? I'm pretty sure you can't just add up those USED's and get a number suggesting how much space deleting them all will free up. AIUI, the USED number for a snapshot means how much that one alone is using; e.g., how much space would be freed by deleting just that one. So any blocks referenced by 2 or more wouldn't show up in those numbers. A bunch of files that have been sitting around a long time would be a good candidate for existing in most (/all) of them, so you won't see them in per-snapshot USED until you delete all but 1. -- Matthew Fuller (MF4839) | fullermd@over-yonder.net Systems/Network Administrator | http://www.over-yonder.net/~fullermd/ On the Internet, nobody can hear you scream.
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