Date: Mon, 27 Nov 2006 21:35:32 +0300 From: "Andrew Pantyukhin" <infofarmer@FreeBSD.org> To: "Dan Nelson" <dnelson@allantgroup.com> Cc: Peter Schuller <peter.schuller@infidyne.com>, freebsd-questions@freebsd.org Subject: Re: Empty directory 60M in size; used to contain 1.7 million files Message-ID: <cb5206420611271035x4c1eee63oc70c4d257098f662@mail.gmail.com> In-Reply-To: <20061127020422.GH29363@dan.emsphone.com> References: <200611270131.44366.peter.schuller@infidyne.com> <20061127020422.GH29363@dan.emsphone.com>
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On 11/27/06, Dan Nelson <dnelson@allantgroup.com> wrote: > In the last episode (Nov 27), Peter Schuller said: > > Observe: > > > > hyperion# ls -la > > total 61634 > > drwxr-xr-x 2 xxx yyy 63047168 Nov 18 21:33 . > > drwxr-xr-x 6 xxx yyy 512 Oct 8 16:39 .. > > hyperion# find . > > . > > hyperion# > > > > The one special circumstance is that the directory previously > > contained 1.7 million small files, that are now deleted. This is on > > FreeBSD 6.1 with UFS2 + softupdates. No snapshots exist of the > > filesystem. > > > > 1.7 million files may be extreme, but I don't see why an empty > > directory would ever consume more than one inode? > > Directories are only shrunk when a file is created and the slack > directory space can be trivially truncated. This is to avoid useless > compaction during "rm -rf"-style activities of a directory that will > just be deleted anyway. Shouldn't it be done after a timeout? I can imagine scenarios when millions of small files are created and deleted in different dirs. Should it result in no disk space (and a clueless user)?
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