On Tue, Jul 10, 2012 at 4:40 PM, Jordi Espasa Clofent <jespa...@minibofh.org> wrote: > On 2012-07-10 11:34, Fajar A. Nugraha wrote: > >> compression = possibly less data to write (depending on the data) = >> possibly faster writes >> >> Some data is not compressible (e.g. mpeg4 movies), so in that case you >> won't see any improvements. > > > Thanks for your answer Fajar. > > As I said in my initial mail, those zones are mainly only writing some > Glassfish logs. Since they all are text files, I guess I can save a lot of > space using compression. Hopefully I can even improve the performance. Can > I? >
correct. Even "normal" OS files are usually compressible-enough. For example, this is my root partition (Ubuntu, but uses zfs nontheles) $ sudo zfs get compression,compressratio C/ROOT/precise NAME PROPERTY VALUE SOURCE C/ROOT/precise compression gzip inherited from C C/ROOT/precise compressratio 2.48x - so on that dataset I save over 50% I/O read/writes (in bytes) > However. What's the difference using > > zfs set compression=on opt/zones/whatever_zone on = standard LZJB compression (very fast, but doesn't compress much) > > or > > zfs set compression=gzip-6 opt/zones/whatever_zone gzip-6 and gzip uses gzip compression. Fast enough, good compression. > > or > > zfs set compression=gzip-9 opt/zones/whatever_zone gzip-9 = uses gzip's best, but also slowest, compression -- Fajar _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
