ZFS compression doesn't work
Andreas Nilsson
andrnils at gmail.com
Tue Aug 28 08:18:11 UTC 2012
On Tue, Aug 28, 2012 at 10:04 AM, antonin tessier <antonintessier at live.fr>wrote:
>
> > >despite I did:
> > ># zfs set compression=gzip home/compressed
> >
> > Did you run that command before or after you copied the data into
> > /home/compressed?
> >
> > How much data did you load into /home/compressed?
> >
> > How did you copy the data into /home/compressed?
> >
> > What is the result of "zfs get all home/compressed"?
>
>
> I did it after the data was copied;
> /home/compressed now contains 7.5 Gio;
>
> "zfs get all home/compressed" tells me "NAME PROPERTY
> VALUE SOURCE
> home/compressed type filesystem -
> home/compressed creation Mon Aug 27 13:49 2012 -
> home/compressed used 7.32G -
> home/compressed available 180G -
> home/compressed referenced 7.32G -
> home/compressed compressratio 1.05x -
> home/compressed mounted yes -
> home/compressed quota none default
> home/compressed reservation none default
> home/compressed recordsize 128K default
> home/compressed mountpoint /home/compressed default
> home/compressed sharenfs off default
> home/compressed checksum on default
> home/compressed compression lzjb local
> home/compressed atime on default
> home/compressed devices on default
> home/compressed exec on default
> home/compressed setuid on default
> home/compressed readonly off default
> home/compressed jailed off default
> home/compressed snapdir hidden default
> home/compressed aclmode discard default
> home/compressed aclinherit restricted default
> home/compressed canmount on default
> home/compressed xattr off temporary
> home/compressed copies 1 default
> home/compressed version 5 -
> home/compressed utf8only off -
> home/compressed normalization none -
> home/compressed casesensitivity sensitive -
> home/compressed vscan off default
> home/compressed nbmand off default
> home/compressed sharesmb off default
> home/compressed refquota none default
> home/compressed refreservation none default
> home/compressed primarycache all default
> home/compressed secondarycache all default
> home/compressed usedbysnapshots 0 -
> home/compressed usedbydataset 7.32G -
> home/compressed usedbychildren 0 -
> home/compressed usedbyrefreservation 0 -
> home/compressed logbias latency default
> home/compressed dedup off default
> home/compressed mlslabel -
> home/compressed sync standard default
> home/compressed refcompressratio 1.05x -
> home/compressed written 7.32G -"
>
> Ending, if I change gzip into lzjb, will my data by compress this new way ?
>
> Thank you.
>
> Only data added after you set compression=on or change
compression=gzip|lzjb will be compressed.
Best regards
Andreas
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