Re: [Bacula-users] Copy disk to tape is 4x slower than tar

I have a copy to tape job which copies from disk to tape using Bacula 7.4.0 and PostgreSQL 9.4 on FreeBSD 10.2

Everything is within one SD

Full details at https://gist.github.com/dlangille/2341a6da8f9ee836270c

The job summary:

Start time: 09-Mar-2016 19:41:54
End time: 09-Mar-2016 20:51:02
Elapsed time: 1 hour 9 mins 8 secs
Priority: 410
SD Files Written: 1
SD Bytes Written: 52,897,660,928 (52.89 GB)
Rate: 12752.6 KB/s

If I tar the volumes directly to tape, it takes only 16 minutes.

$ time sudo tar -cf /dev/nsa1 IncrAuto-4525 IncrAuto-4320 IncrAuto-4324 IncrAuto-4321 \
> IncrAuto-4055 IncrAuto-4322 IncrAuto-4319 IncrAuto-3969 IncrAuto-3972 \
> IncrAuto-3973 IncrAuto-3971 IncrAuto-4058

real 15m47.508s
user 0m5.844s
sys 1m51.834s

Spooling attributes is trivial:

09-Mar 20:51 crey-sd JobId 232945: Sending spooled attrs to the Director. Despooling 321 bytes ...
09-Mar 20:51 bacula-dir JobId 232944: Bacula bacula-dir 7.4.0 (16Jan16):

I am not sure where to look to figure this out.

Hello, Dan: maybe there is nothing to figure it out. Packing volumes with tar directly to tapes makes you unable to restore a single file or even a single job (with bootstrap) from an entire tape. I think it's a trade-off.

--
Dan Langille - BSDCan / PGCon
dan AT langille DOT org

Regards,

=======================================================================
Heitor Medrado de Faria - LPIC-III | ITIL-F | Bacula Systems Certified Administrator II

Próximas aulas telepresencial ao-vivo - 15 de fevereiro: http://www.bacula.com.br/agenda/

Ministro treinamento e implementação in-company Bacula: http://www.bacula.com.br/in-company/

Ou assista minhas videoaulas on-line: http://www.bacula.com.br/treinamento-bacula-ed/

61 8268-4220

Site: www.bacula.com.br | Facebook: heitor.faria

========================================================================

------------------------------------------------------------------------------
Transform Data into Opportunity.
Accelerate data analysis in your applications with
Intel Data Analytics Acceleration Library.
Click to learn more.
http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140

_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users