ZFS command can block the whole ZFS subsystem!
Adam Vande More
amvandemore at gmail.com
Sun Jan 5 12:43:19 UTC 2014
On Sun, Jan 5, 2014 at 2:11 AM, O. Hartmann <ohartman at zedat.fu-berlin.de>wrote:
> On Sun, 5 Jan 2014 10:14:26 +1100
> Peter Jeremy <peter at rulingia.com> wrote:
>
> > On 2014-Jan-04 23:26:42 +0100, "O. Hartmann"
> > <ohartman at zedat.fu-berlin.de> wrote:
> > >zfs list -r BACKUP00
> > >NAME USED AVAIL REFER MOUNTPOINT
> > >BACKUP00 1.48T 1.19T 144K /BACKUP00
> > >BACKUP00/backup 1.47T 1.19T 1.47T /backup
> >
> > Well, that at least shows it's making progress - it's gone from 2.5T
> > to 1.47T used (though I gather that has taken several days). Can you
> > pleas post the result of
> > zfs get all BACKUP00/backup
> >
>
> Here we go:
>
>
> NAME PROPERTY VALUE SOURCE
> BACKUP00/backup type filesystem -
> BACKUP00/backup creation Fr Dez 20 23:17 2013 -
> BACKUP00/backup used 1.47T -
> BACKUP00/backup available 1.19T -
> BACKUP00/backup referenced 1.47T -
> BACKUP00/backup compressratio 1.00x -
> BACKUP00/backup mounted no -
> BACKUP00/backup quota none default
> BACKUP00/backup reservation none default
> BACKUP00/backup recordsize 128K default
> BACKUP00/backup mountpoint /backup local
> BACKUP00/backup sharenfs off default
> BACKUP00/backup checksum sha256 local
> BACKUP00/backup compression lz4 local
> BACKUP00/backup atime on default
> BACKUP00/backup devices on default
> BACKUP00/backup exec on default
> BACKUP00/backup setuid on default
> BACKUP00/backup readonly off default
> BACKUP00/backup jailed off default
> BACKUP00/backup snapdir hidden default
> BACKUP00/backup aclmode discard default
> BACKUP00/backup aclinherit restricted default
> BACKUP00/backup canmount on default
> BACKUP00/backup xattr on default
> BACKUP00/backup copies 1 default
> BACKUP00/backup version 5 -
> BACKUP00/backup utf8only off -
> BACKUP00/backup normalization none -
> BACKUP00/backup casesensitivity sensitive -
> BACKUP00/backup vscan off default
> BACKUP00/backup nbmand off default
> BACKUP00/backup sharesmb on local
> BACKUP00/backup refquota none default
> BACKUP00/backup refreservation none default
> BACKUP00/backup primarycache all default
> BACKUP00/backup secondarycache all default
> BACKUP00/backup usedbysnapshots 0 -
> BACKUP00/backup usedbydataset 1.47T -
> BACKUP00/backup usedbychildren 0 -
> BACKUP00/backup usedbyrefreservation 0 -
> BACKUP00/backup logbias latency default
> BACKUP00/backup dedup on local
>
As already described by Dan and perhaps not followed up on: dedup requires
at very large amount of memory. Assuming 32GB is sufficient is most likely
wrong.
What does zdb -S BACKUP00 say?
Also I will note you were asked if the ZFS FS in question had dedup
enabled. You replied with a response from an incorrect FS.
--
Adam
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