On Mon, Jul 20, 2009 at 10:37 AM, Victor Hugo dos Santos<listas....@gmail.com> wrote: > On Fri, Jul 17, 2009 at 6:53 PM, John Drescher<dresche...@gmail.com> wrote: >> On Fri, Jul 17, 2009 at 5:59 PM, Simone S. >> Santiago<sim...@magistrainfo.com.br> wrote: >>> Hey co-workers, >>> >>> I wonder if it is possible improve the Bacula compression? >>> I am using "compression = GZIP" but sometimes it compress only 15% of >>> all volume. >>> >>> Note: My backup is FILE Type. >>> >> Try: >> >> compression=GZIP9 >> >> http://www.bacula.org/en/rel-manual/Configuring_Director.html#SECTION001470000000000000000 >> >> Note that this will take much longer to compress however. > > > mmmm.. GZIP9 no represent exactly best compression method.. > > I send one or two mail to list, about this theme and I ran various > tests with distinct values to GZIP and basically this are the results: > > > ************************************************ > Reporte de hoy (con GZIP=5 y 140GB) > ==================================================== > Scheduled time: 17-Mar-2009 04:30:00 > Start time: 17-Mar-2009 04:51:20 > End time: 17-Mar-2009 05:44:24 > Elapsed time: 53 mins 4 secs > FD Bytes Written: 18,119,898,810 (18.11 GB) > SD Bytes Written: 18,119,923,547 (18.11 GB) > Rate: 5690.9 KB/s > Software Compression: 87.9 % > ==================================================== > > > Reporte de ayer (con GZIP=6 y 140GB) > ==================================================== > Scheduled time: 16-Mar-2009 04:30:00 > Start time: 16-Mar-2009 04:35:28 > End time: 16-Mar-2009 05:55:55 > Elapsed time: 1 hour 20 mins 27 secs > FD Bytes Written: 17,570,761,480 (17.57 GB) > SD Bytes Written: 17,570,786,217 (17.57 GB) > Rate: 3640.1 KB/s > Software Compression: 88.2 % > ==================================================== > > > Reporte del domingo pasado (con GZIP=9 y 145GB) > ==================================================== > Scheduled time: 08-Mar-2009 04:30:00 > Start time: 08-Mar-2009 04:30:27 > End time: 08-Mar-2009 08:34:00 > Elapsed time: 4 hours 3 mins 33 secs > Priority: 10 > FD Bytes Written: 18,452,613,999 (18.45 GB) > SD Bytes Written: 18,458,242,303 (18.45 GB) > Rate: 1262.8 KB/s > Software Compression: 88.1 % > ==================================================== > ************************************************ > > well.. as you can see, for me, the GZIP=6 (default) is the bester > method...because is more faster and compress better that GZIP9. > > bye >
You are not using the same exact dataset (145GB versus 140GB source data ) in both tests so its meaningless that GZIP6 is better than GZIP9. John ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/Challenge _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
