Kern Sibbald wrote: > On Monday 09 April 2007 16:20, Josh Fisher wrote: > >> There's no reason they cannot use the same pool. They just cannot write >> to the same volume concurrently. With a tape device, that would be a >> problem because there can only be one volume in the tape drive. >> > > True. > > >> However >> with a disk device, a volume is a file, so there can be numerous volumes >> being written concurrently. >> > > This is not true within Bacula. For each Device (tape, DVD, disk, FIFO, ...) > Bacula has a single file descriptor thus only one Volume can be open for each > Device, whether tape or disk. Multiple jobs can be simultanously writing to > that Volume. However, since a Volume can be in only one Pool, and since you > can only write to one Volume per Device, you can only be simultaneously > writing to one Pool per Device. > > To simultaneously write to more than one Pool, you need multiple Devices. > >
Yes. I guess I didn't phrase that very carefully. I believe Kyle has two pools, "local_pool" and "remote_pool", and each pool is using a different Storage resource by specifying Storage= in the Pool resource definition. I assume the Storage resources are pointing to two different SD devices. In that case, specifying Maximum Volume Jobs = 1 in both of the pools should prevent the possibility of interleaving. A volume from local_pool can be written concurrently with a volume from remote_pool, but only one job at a time can write to a local_pool volume and only one job at a time can write to a remote_pool volume. >> One way is to use Maximum Volume Jobs = 1 in >> the Pool resource definition. This will cause a new volume (ie. file) to >> be used for each job that is run. >> >> Kyle Tucker wrote: >> >>> Hi, >>> I have a new Bacula 2.0.2 setup and I am backing up to >>> disk. I have remote clients that are very slow to backup and >>> often prevent my more important local clients from being backed >>> up due to concurrency being set to 1 as I don't want to get into >>> the issues with interleaving as it's suggested to avoid in the >>> warning section on concurrent jobs. >>> I already have things so my remote clients are in separate >>> pools and I understand I can set these pools into separate Device >>> resources and Bacula will allow 2 concurrent jobs to run. Is there >>> a way that I can limit the 2 concurrent jobs to not run within the >>> same pool, causing the interleaving blocks issue? I looked at using >>> priorities, but that didn't look like it would control what I am >>> trying to do here. Thanks. >>> >>> >>> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to share your >> opinions on IT & business topics through brief surveys-and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Bacula-users mailing list >> Bacula-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/bacula-users >> >> > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Bacula-users mailing list > Bacula-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bacula-users > > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
