Date: Thu, 24 Jul 2014 15:02:36 +0930 From: Shane Ambler <FreeBSD@ShaneWare.Biz> To: Janos Dohanics <web@3dresearch.com>, FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Disk space economy Message-ID: <53D09A74.8060009@ShaneWare.Biz> In-Reply-To: <20140723175553.6d9ce905ae7f8329099fda15@3dresearch.com> References: <20140723172954.e86883fcc8f54ee7ccbe32fd@3dresearch.com> <1406151644.20477.37.camel@btw.pki2.com> <20140723175553.6d9ce905ae7f8329099fda15@3dresearch.com>
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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
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