On Tuesday 22 May 2007 14:02, John Drescher wrote: > > So to summarize my impressions: > > There *might* be a bug in the volume-selection-code of bacula which exists at > > least from V1.38 up to V2.1.10beta which leads sometimes to selecting the > > wrong volume for a job. > > As far as I can tell (but my vision might be clouded by the circumstance, that > > I am using a multidrive autochanger myself) is, that this bug shows his head > > more often (or only) when using a (multidrive) autochanger. > > By now there are far, far to many if's, might's, and more subjunctives to file > > a bug report. > > > I believe the problem is that if you have prefer mounted volumes on > with multidrive autochanger bacula ends up using only the first drive > in the changer unless you force jobs to the individual drives.
With perfer mounted volumes on (default), as you know the algorithm will always select a drive that is currently mounted, however, if I am not mistaken, when no jobs are running and there are two drives with appropriate Volumes mounted, it will attempt to alternate between them, and if there are multiple drives actually writing, the algorithm will attempt to balance the number of jobs on each drive (I didn't look at the code, and this last remark may only apply if prefer mounted volumes is off). > If you have prefer mounted volumes off bacula will pick any tape in the pool > when running jobs. The algorithm for picking available Volumes from the correct Pool is in the Director, and is totally independent of the state of prefer mounted volumes and anything else that is going on in the SD ... > I would say that both results are not what a user of a multitape changer would want. Well that is an interesting remark. What does a user of a multiple "drive" autochanger want? Regards, Kern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
