On 11/18/10 05:56, Dermot Beirne wrote: > Hi, > There is a big difference in the size of individual jobs, they range > from maybe 30Gb to 300Gb. No individual job would be multi terabyte. > The number of clients combined would be over 1 TB for a given day, > rather than an individual job. I used 5Gb as it was a suggested size > in the bacula documentation.
5GB is a good starting size for fixed-size volumes for a small installation, but one size need not fit all. It's undoubtedly not an appropriate choice for a site with a backup volume measured in terabytes per day. With that kind of volume of data to back up and that much evident disk space available to do it with, if I wanted to limit volume sizes I think I might set my volume size limit at 100GB, or even larger. In actual fact, although my total full-backup set is under a terabyte, I don't actually limit the size of my disk volumes at all; I instead use Volume Write Duration to limit any given volume to hold only a single day's jobs. Remember that none of the examples in the documentation is set in stone. Use them as a starting point, sure, but apply logic and decide what's reasonable in your case. Any volume size limit that forces you to allocate several hundred volumes for a single day of incremental backups is probably not appropriate for *your* installation, and may be costing you significant time in sheer overhead. If you're getting any kind of sane transfer rate at all for a dataset of that size, Bacula must be having to create new volumes and switch volumes every few seconds. -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 ala...@caerllewys.net ala...@metrocast.net p...@co.ordinate.org Renaissance Man, Unix ronin, Perl hacker, Free Stater It's not the years, it's the mileage. ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today http://p.sf.net/sfu/msIE9-sfdev2dev _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users