Re: [Bacula-users] Bacula Compression

On Fri, Jul 17, 2009 at 6:53 PM, John Drescher<drescherjm AT gmail DOT com> 
wrote:
> On Fri, Jul 17, 2009 at 5:59 PM, Simone S.
> Santiago<simone AT magistrainfo.com DOT 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

-- 
-- 
Victor Hugo dos Santos
Linux Counter #224399

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