On Tue, Jul 10, 2012 at 4:25 PM, Jordi Espasa Clofent <jespa...@minibofh.org> wrote: > Hi all, > > By default I'm using ZFS for all the zones: > > admjoresp@cyd-caszonesrv-15:~$ zfs list > NAME USED AVAIL REFER MOUNTPOINT > opt 4.77G 45.9G 285M /opt > opt/zones 4.49G 45.9G 29K /opt/zones > opt/zones/glad-gm02-ftcl01 367M 45.9G 367M /opt/zones/glad-gm02-ftcl01 > opt/zones/glad-gp02-ftcl01 502M 45.9G 502M /opt/zones/glad-gp02-ftcl01 > opt/zones/glad-gp02-ftcl02 1.21G 45.9G 1.21G /opt/zones/glad-gp02-ftcl02 > opt/zones/mbd-tcasino-02 257M 45.9G 257M /opt/zones/mbd-tcasino-02 > opt/zones/mbd-tcasino-04 281M 45.9G 281M /opt/zones/mbd-tcasino-04 > opt/zones/mbfd-gp02-ftcl01 501M 45.9G 501M /opt/zones/mbfd-gp02-ftcl01 > opt/zones/mbfd-gp02-ftcl02 475M 45.9G 475M /opt/zones/mbfd-gp02-ftcl02 > opt/zones/mbhd-gp02-ftcl01 475M 45.9G 475M /opt/zones/mbhd-gp02-ftcl01 > opt/zones/mbhd-gp02-ftcl02 507M 45.9G 507M /opt/zones/mbhd-gp02-ftcl02 > > However, I have the compression disabled in all of them. > > According to this Oracle whitepaper > http://www.oracle.com/technetwork/server-storage/solaris10/solaris-zfs-in-containers-wp-167903.pdf: > > "The next example demonstrates the compression property. If compression is > enabled, Oracle Solaris ZFS will transparently compress all of the data > before it is written to disk. The benefits of compression > are both saved disk space and possible write speed improvements." > > What exactly means "POSSIBLE" write speed improvements?
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. -- Fajar _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
