Hi Kern, On Thursday 01 July 2010, Kern Sibbald wrote: > Hello Howard, > > What does "chunked" backup mean exactly? I am not sure what the high level > concept is here. Bacula can already backup multi-gigabyte virtual disks, so > obviously you are thinking about something different.
The concept that I am calling 'chunked backup' is sub-file incremental backup. Currently, for a 10Gb Virtualbox virtual disk, a Full-backup will backup the whole file. Subsequent incremental backups, where perhaps only 1Mb of the virtual-disk has changed, will backup the entire [10Gb] single file, because it has changed. Bacula currently records a hash-value for the entire file, whereas I am intending, in addition and for appropriately large files, to record a hash-value for sub-file chunks, to be able to selectively not backup those chunks when doing an incremental / differential backup. I want to use Bacula to do full + incremental backups of my own system, to disk, without separating out virtual-disks into separate backups, with different recycle criteria for space constraint reasons. Current [admittedly] simple-minded incremental backups of my file-tree are much larger than they need to be ... Regards, Howard -- "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." -- Albert Einstein ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Bacula-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/bacula-devel
