I have half an idea for a feature request but it's not well defined yet... Basically, I have a bunch of clients to back up, some are on gigabit network and some are stuck on 100mbit. They are being backed up to a disk that has throughput of around 20-30mbytes/second.
I am allowing 2 jobs to run at once, which works well but I think it could work better. I was thinking of something along the lines of assigning a 'cost' to each client, and have the scheduler make sure that the sum of all current clients is under some threshold, something like: Client1 - gigabit network and fast disks - cost = 100 Client2 - gigabit network and slow disks - cost = 50 Client3 - 100mbit network - cost = 20 Client4 - 100mbit network - cost = 20 Client5 - gigabit network and fast disks - cost = 100 Client6 - gigabit network and fast disks - cost = 100 Client1,5, and 6 are pretty much capable of saturating the backup medium on their own, Client2,3, and 4 are not. I could then set a maximum concurrent job 'cost' of 150, and bacula would run as many jobs as it could concurrently as long as the total cost remained <= than that figure. So... Client1 and 2 would start running (total cost = 150) Client1 would finish and Client3 and 4 would start (total cost = 90) Client2 would finish and Client5 would start (total cost = 140) Client3 would finish Client4 would finish Client5 would finish and then Client6 would start What I'm finding now is that once the two slowest jobs start running, there is idle bandwidth on the backup medium until one of them finishes and a faster one starts. The problem gets worse once you start thinking about maybe backing up some data over a wan or something. Maybe I could increase the concurrent jobs to 3 or more but I'd like to minimise the backup window of each client if I can. Comments? James ------------------------------------------------------------------------------ Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are powering Web 2.0 with engaging, cross-platform capabilities. Quickly and easily build your RIAs with Flex Builder, the Eclipse(TM)based development software that enables intelligent coding and step-through debugging. Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
