Support wrote: > Dear Shon > > I have a similar situation and solved it byusing this stargegy. > > Firstly the disk volumes should be treated as "Tape" drives in that only > onle volume can be opened at a time but you can have many concurrent jobs > writing to that volume - my setting is for a maximum of 5 concurrent jobs/ > >
The problem with concurrent jobs writing to the same volume is that job data is interleaved on the volume. For tape, the interleaving will make restores painfully slow. Even for disk storage it will slow things down. I prefer to have one job at a time write to a volume so that the jobs are placed sequentially in the volume. This would require multiple drives for tape, but for disk it just requires multiple device resources, each writing to a separate volume. The volumes "loaded" in those devices are regular files and can be in the same partition or even the same directory. > I write data to a LaCie 1 TB disc using Firewire and get throughput of > about 60 GB / hr. > > If you have several customers and can group them then one option is to > partition your disc so that each group uses a different partition and this > can be seen as a different "tape" drive and the jobs should write to each > partition concurrently. > They can be grouped by directories in the same partition. Partitioning will not likely make use of the full storage capacity of the drive because one partition will fill up first, leaving wasted space on the others. Grouping by directory and using a single partition on the drive allows the full capacity of the drive to be used. > As for full backups I use job migration - ie the jobs are written to disc > and then migrated to tape. > > If you need my config files I will email them to you. > > Regards > Stephen Carr > > Shon Stephens wrote: > >> I'm trying to understand job concurrency in Bacula and what strategy I >> should use for backing up clients. >> >> Its likely that I will have to backup around 50 clients. My strategy is to >> write incrementals to disk volumes and fulls to tapes. I assume its >> possible >> for Bacula to write to multiple disk volumes simultaneously if configured >> to >> do so, but what about tapes? I have my tapes divided by customer so that >> >> Customer1 Pool - 8 volumes, 2 in slots each week >> Customer2 Pool - 8 volumes, 2 in slots each week >> >> Can Bacula write a job from 2 different clients(file daemons) in Customer1 >> Pool at the same time? How does this work? I understand that Bacula can't >> write a job from Customer1 Pool and Customer2 Pool at the same time >> because >> these are different volumes. >> >> Also can bacula simultaneously spool to disk and write to tape for the >> same >> job? >> >> I'm looking for good advice on how to streamline Bacula so that I'm not >> always running backups or have to many jobs waiting on resources in use. >> >> Thanks, >> Shon >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Splunk Inc. >> Still grepping through log files to find problems? Stop. >> Now Search log events and configuration files using AJAX and a browser. >> Download your FREE copy of Splunk now >> >> http://get.splunk.com/_______________________________________________ >> Bacula-users mailing list >> Bacula-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/bacula-users >> >> > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
