Il giorno 03/mar/2011, alle ore 20.53, Alan Brown ha scritto: > Fabio Napoleoni - ZENIT wrote: > >> Thank you for your analysis, after that I think that the problem is not the >> nfs overhead, because the despooling phase (over nfs filsystem) has a >> transfer rate of 7.3 MBps, so it's fine. Instead the first phase (bacula-fd >> -> bacula-sd) happens at 1.2 MBps which is very poor value I think. > > Is this a full backup?
Yes it is. > You can't get accurate results with anything else. > > compression=GZIP # compress backup > > This will have a MARKED effect on your speeds. Consider switching it off and > see how fast things go. I tried to disable both compression and signature with this results: Job write elapsed time = 00:03:31, Transfer rate = 7.918 M Bytes/second Despooling elapsed time = 00:03:50, Transfer rate = 7.272 M Bytes/second This is the performances with signature only (no compression) Job write elapsed time = 00:03:42, Transfer rate = 7.528 M Bytes/second And this is the performances with compression only (no signature) Job write elapsed time = 00:12:51, Transfer rate = 1.322 M Bytes/second So the poor throughput is given by software compression. I don't know what to choose in the speed vs space tradeoff. Ideally the best option could be compression on the storage director (it has more powerful hardware than this client) but I think that bacula currently doesn't support this feature. Thanks for help me to solve this. -- Fabio Napoleoni - ZENIT fa...@zenit.org "Computer Science is no more about computers than astronomy is about telescopes" Edsger W. Dijkstra ------------------------------------------------------------------------------ What You Don't Know About Data Connectivity CAN Hurt You This paper provides an overview of data connectivity, details its effect on application quality, and explores various alternative solutions. http://p.sf.net/sfu/progress-d2d _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users