Re: discrepancies in used space after cpio

From: Christof Schulze <christof.schulze_at_gmx.net>
Date: Mon, 18 May 2009 14:12:08 +0200
Am Montag 18 Mai 2009 11:00:53 schrieb Paul Wootton:
> Hi,
>
> I am currently in the process of moving all my data around, going from a
> single zfs drive (ex-mirror) to a zfs raidz.
> I have used cpio to copy the data to the new pool, but a du shows a big
> difference in the results.
>
> Does anyone have any ideas, or does a "du -h ." not do what I think it
> should?
it is a known bug (at least for the solaris folks) that du does not display 
disk usage correctly on raidz.

But of course different compression algorithms come into play as well.

Regards,

Christof

>
> Cheers
> Paul
>
>
>
> demophon# uname -a
> FreeBSD demophon 8.0-CURRENT FreeBSD 8.0-CURRENT #14: Fri May 15
> 16:48:17 BST 2009     paul_at_demophon:/usr/obj/usr/src/sys/DEMOPHON  amd64
>
>
>
> demophon# zpool status
>   pool: DemoPool
>  state: ONLINE
>  scrub: none requested
> config:
>
>         NAME        STATE     READ WRITE CKSUM
>         DemoPool    ONLINE       0     0     0
>           raidz1    ONLINE       0     0     0
>             ad20p3  ONLINE       0     0     0
>             ad18p3  ONLINE       0     0     0
>             ad16p4  ONLINE       0     0     0
>
> errors: No known data errors
>
>   pool: zfsroot
>  state: ONLINE
>  scrub: none requested
> config:
>
>         NAME        STATE     READ WRITE CKSUM
>         zfsroot     ONLINE       0     0     0
>           ad16p3    ONLINE       0     0     0
>
> errors: No known data errors
>
>
>
> demophon# mount
> zfsroot/root on / (zfs, local)
> devfs on /dev (devfs, local)
> DemoPool on /DemoPool (zfs, local)
> DemoPool/root on /DemoPool/root (zfs, local)
> DemoPool/tmp on /DemoPool/tmp (zfs, local)
> DemoPool/usr on /DemoPool/usr (zfs, local)
> DemoPool/var on /DemoPool/var (zfs, local)
> zfsroot/tmp on /tmp (zfs, local)
> zfsroot/usr on /usr (zfs, local)
> zfsroot/var on /var (zfs, local)
>
>
>
> demophon# pwd
> /DemoPool/var/tmp/kdecache-paul/kpc
> demophon# ls -lah
> total 1282522
> drwx------   2 paul  paul    25B May 15 19:35 .
> drwx------  11 paul  paul    16B May 15 19:36 ..
> -rw-r--r--   1 paul  paul   5.0M May  6 16:47 kapman_cache.data
> -rw-r--r--   1 paul  paul   1.3M May  6 16:47 kapman_cache.index
> -rw-r--r--   1 paul  paul    15M May 15 17:52 kde-icon-cache.data
> -rw-r--r--   1 paul  paul   4.1M May 15 19:35 kde-icon-cache.index
> -rw-r--r--   1 paul  paul     0B May 15 19:35 kde-icon-cache.updated
> -rw-r--r--   1 paul  paul   5.0M May  6 16:48 kdiamond-cache.data
> -rw-r--r--   1 paul  paul   1.3M May  6 16:48 kdiamond-cache.index
> -rw-r--r--   1 paul  paul   120M Mar 20 08:54 plasma_theme_Atelier.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:54 plasma_theme_Atelier.index
> -rw-r--r--   1 paul  paul   120M May  4 18:18 plasma_theme_Aya.data
> -rw-r--r--   1 paul  paul    32M May  4 18:18 plasma_theme_Aya.index
> -rw-r--r--   1 paul  paul   120M May 15 18:20 plasma_theme_Elegance.data
> -rw-r--r--   1 paul  paul    32M May 15 19:01
> plasma_theme_Elegance.index -rw-r--r--   1 paul  paul   120M Mar 22
> 19:17 plasma_theme_Glassified.data -rw-r--r--   1 paul  paul    32M Mar
> 22 20:05 plasma_theme_Glassified.index -rw-r--r--   1 paul  paul   120M
> Mar 20 08:53 plasma_theme_Led
> revolution.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:54 plasma_theme_Led
> revolution.index
> -rw-r--r--   1 paul  paul   120M Mar 20 08:54 plasma_theme_Oxyook.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:55 plasma_theme_Oxyook.index
> -rw-r--r--   1 paul  paul   120M May  4 18:19 plasma_theme_default.data
> -rw-r--r--   1 paul  paul    32M May  4 18:19 plasma_theme_default.index
> -rw-r--r--   1 paul  paul   120M Mar 20 08:55 plasma_theme_spoons.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:55 plasma_theme_spoons.index
> demophon# du -h .
> 1.2G    .
> demophon#
>
>
>
> demophon# pwd
> /var/tmp/kdecache-paul/kpc
> demophon# ls -lah
> total 7833
> drwx------   2 paul  paul    25B May 18 09:37 .
> drwx------  11 paul  paul    16B May 18 09:12 ..
> -rw-r--r--   1 paul  paul   5.0M May  6 16:47 kapman_cache.data
> -rw-r--r--   1 paul  paul   1.3M May  6 16:47 kapman_cache.index
> -rw-r--r--   1 paul  paul    15M May 18 09:37 kde-icon-cache.data
> -rw-r--r--   1 paul  paul   4.1M May 18 09:37 kde-icon-cache.index
> -rw-r--r--   1 paul  paul     0B May 18 09:37 kde-icon-cache.updated
> -rw-r--r--   1 paul  paul   5.0M May  6 16:48 kdiamond-cache.data
> -rw-r--r--   1 paul  paul   1.3M May  6 16:48 kdiamond-cache.index
> -rw-r--r--   1 paul  paul   120M Mar 20 08:54 plasma_theme_Atelier.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:54 plasma_theme_Atelier.index
> -rw-r--r--   1 paul  paul   120M May  4 18:18 plasma_theme_Aya.data
> -rw-r--r--   1 paul  paul    32M May  4 18:18 plasma_theme_Aya.index
> -rw-r--r--   1 paul  paul   120M May 18 09:37 plasma_theme_Elegance.data
> -rw-r--r--   1 paul  paul    32M May 18 09:37
> plasma_theme_Elegance.index -rw-r--r--   1 paul  paul   120M Mar 22
> 19:17 plasma_theme_Glassified.data -rw-r--r--   1 paul  paul    32M Mar
> 22 20:05 plasma_theme_Glassified.index -rw-r--r--   1 paul  paul   120M
> Mar 20 08:53 plasma_theme_Led
> revolution.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:54 plasma_theme_Led
> revolution.index
> -rw-r--r--   1 paul  paul   120M Mar 20 08:54 plasma_theme_Oxyook.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:55 plasma_theme_Oxyook.index
> -rw-r--r--   1 paul  paul   120M May  4 18:19 plasma_theme_default.data
> -rw-r--r--   1 paul  paul    32M May  4 18:19 plasma_theme_default.index
> -rw-r--r--   1 paul  paul   120M Mar 20 08:55 plasma_theme_spoons.data
> -rw-r--r--   1 paul  paul    32M Mar 20 08:55 plasma_theme_spoons.index
> demophon# du -h .
> 7.6M    .
> demophon#
>
>
>
> demophon# zfs
> list
> NAME                                USED  AVAIL  REFER
> MOUNTPOINT
> DemoPool                           66.8G   382G  30.6K
> /DemoPool
> DemoPool/root                   1.67G   382G  1.67G  /DemoPool/root
> DemoPool/tmp                   3.03G   382G  3.03G  /DemoPool/tmp
> DemoPool/usr                    59.6G   382G  59.6G  /DemoPool/usr
> DemoPool/var                    2.51G   382G  2.51G  /DemoPool/var
> zfsroot                                79.0G   145G    18K
> none
> zfsroot/root                        1.78G   145G  1.78G
> /
> zfsroot/tmp                        3.67G   145G  3.67G
> /tmp
> zfsroot/usr                         72.1G   145G  59.2G
> /usr
> zfsroot/usr_at_auto.... (removed huge list for email)
> zfsroot/var                         1.50G   145G  1.18G  /var
> zfsroot/var_at_auto.... (removed huge list for email)
> demophon#
>
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Received on Mon May 18 2009 - 10:12:19 UTC

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