Il 01/09/2011 13:38, frank_sg ha scritto: > Thanks fpr replying. > > @Alexandre: Yes, exactly, the 10MB/s (average) come from bacula job > report. > > @Marcello: No - very time the spool fs is full (or the maximum spool > size per job etc.) is reached the spool fs is despooled to tape. And > that is where I hope to get the advantage from: despooling with full > speed to tape. You are right, the fs has to be fast enough - which > SSDs would be obviously. That the reason for the idea about them. A > RAID0 with 12 disks direct attached with SAS should also be fast > enough - but which option is the one to choose? > > Regards, Frank >
I have not investigated deeply into bacula spooling... After your clarification I re-read this: http://www.bacula.org/en/dev-manual/main/main/Data_Spooling.html but I'm still not sure how the whole thing works if one doesn't set a limit on spool area size (I didn't). What puzzles me is that every e-mail I get from bacula (one e-mail per job run) contains lines similar to these: Job write elapsed time = 00:01:35, Transfer rate = 4.455 M Bytes/second Committing spooled data to Volume "WednesdayTape". Despooling 423,960,356 bytes ... Despooling elapsed time = 00:00:25, Transfer rate = 16.95 M Bytes/second Sending spooled attrs to the Director. Despooling 2,392,621 bytes ... [...] Rate: 3405.1 KB/s Software Compression: None Which makes me wonder whether each job is spooled independently... About job speed: notice how the final speed reported for the whole job is very low compared to the despooling speed. That figure can be misleading. I think one has to consider transfer rate and despooling speed separately. -- Marcello Romani ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users