On Wednesday 05 October 2005 19:52, Ross Boylan wrote: > On Wed, Oct 05, 2005 at 11:42:09AM +0100, Russell Howe wrote: > > Ross Boylan wrote: > > ... > > > > Given jobs scheduled at different times, does priority add anything to > > > when they are run? > > > > If a higher priority job is running, a lower priority job will not start. > > > > "higher priority" means a low value for Priority > > "lower priority" means a higher value for Priority > > If you only allow a single job to run at a time, whichever starts > first runs first and will complete before the next job. So it sounds > as if priority matters under two scenarios > > 1) concurrent jobs allowed (which is what most of the snipped > discussion concerns). Priorities can guarantee that certain waves of > jobs will finish completely before other start. Without priorities, a > lower priority job might start while a higher priority one is running > (high priority = low priority number), even if the start time of that > job is scheduled later. > > 2) single jobs. Priorities may influence which of several > simultaneously scheduled jobs start first, but this is not completely > reliable. > > Am I following correctly?
Yes, with the exception of item 2. The scheduler *should* normally start simultaneous jobs in priority order, but I warned users, that if they want to be 100% simply defer the start times appropriately. The scheduler cannot possibly schedule all jobs to infinity, so it works on a two hour basis, thus without a mathematical proof, I cannot be 100% sure what will happen in all cases. > > Ross > > > ------------------------------------------------------- > This SF.Net email is sponsored by: > Power Architecture Resource Center: Free content, downloads, discussions, > and more. http://solutions.newsforge.com/ibmarch.tmpl > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users -- Best regards, Kern ("> /\ V_V ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
