Date: Fri, 3 May 2013 11:36:02 -0700 From: Jeremy Chadwick <jdc@koitsu.org> To: Mike Carlson <mike@bayphoto.com> Cc: freebsd-fs@freebsd.org Subject: Re: zfs issue - disappearing data Message-ID: <20130503183602.GA46512@icarus.home.lan> In-Reply-To: <5183F739.2040908@bayphoto.com> References: <5183F739.2040908@bayphoto.com>
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On Fri, May 03, 2013 at 10:43:21AM -0700, Mike Carlson wrote: > {snipping parts I have no knowledge of} > > History for 'data': > {snip} > 2013-02-25.17:12:22 zfs set compression=lzjb data > > We had a file structure drop off: > > /data/XML_WORKFLOW/XML_ORDERS/ > > around 5/2/2012 @ 17:00 > > In that directory, there were a few thousand directories (containing > images and a couple metadata text/xml files) > > What is odd, is doing a du -h in the parent XML_WORKFLOW directory, > only reports ~150MB: > > # find . -type f |wc -l > 86 > # du -sh . > 130M . > > > however, df reports 1.5GB: > > # df -h . > Filesystem Size Used Avail Capacity Mounted on > data/XML_WORKFLOW 28T 1.5G 28T 0% /data/XML_WORKFLOW This is one of the side effects of ZFS compression. Google "zfs compression df du freebsd". You'll find lots of chat about this. To be clear: it is not a FreeBSD-specific thing. You may also find the -A flag to du(1) useful. -- | Jeremy Chadwick jdc@koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |
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