Date: Thu, 24 Jul 2014 02:41:33 -0400 From: Janos Dohanics <web@3dresearch.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Disk space economy Message-ID: <20140724024133.072b27205b8539ed7be7cde5@3dresearch.com> In-Reply-To: <53D09A74.8060009@ShaneWare.Biz> References: <20140723172954.e86883fcc8f54ee7ccbe32fd@3dresearch.com> <1406151644.20477.37.camel@btw.pki2.com> <20140723175553.6d9ce905ae7f8329099fda15@3dresearch.com> <53D09A74.8060009@ShaneWare.Biz>
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On Thu, 24 Jul 2014 15:02:36 +0930 Shane Ambler <FreeBSD@ShaneWare.Biz> wrote: > On 24/07/2014 07:25, Janos Dohanics wrote: > > On Wed, 23 Jul 2014 14:40:44 -0700 > > Dennis Glatting <freebsd@penx.com> wrote: > > > >> On Wed, 2014-07-23 at 17:29 -0400, Janos Dohanics wrote: > >>> Hello List, > >>> > >>> I have a directory which contains 48 files. 35 of these files are > >>> large, close to 2 GB (reported by ls -l). 7 of the files a smaller > >>> than 4 K, the rest of the files are few dozen Ks in size. > >>> > >>> This is a FreeBSD 10 system with ZFS and RAIDZ2. > >>> > >>> du -h reports the directory to be 208G. > >>> > >>> du -A -h reports the directory to be 69G. > >>> > >>> It seems there is 2G wasted for each 1G stored data - would you > >>> explain why and what can I do make more economical use of disk > >>> space? > >>> > >> > >> Compression and/or dedup enabled? > > > > > > The answer is no and no: > > > > # zfs get all data > > NAME PROPERTY VALUE SOURCE > > > data copies 3 local > > copies is the relevant setting. > > From man du - > The du utility displays the file system block usage for each file > -A Display the apparent size instead of the disk usage > > With 3 copies the disk blocks used add up to 208G but with apparent > size you get the size of each file totalling 69G - roughly 1/3 Thank you... I completely missed this one. -- Janos Dohanics
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