>>>>> On Tue, 28 Jun 2005 17:11:12 +0530, Siju George <[EMAIL PROTECTED]> said: Siju> DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
Siju> On 6/28/05, Martin Simmons <[EMAIL PROTECTED]> wrote: Siju> Could you please explain how??? >> >> For each file saved in the backup, you record its full path and some unique id >> that remains unchanged during renaming (e.g. the inode number on UNIX). For >> each dir saved, you also record the names of the all files/dirs in that dir. >> You do both of these things for the initial full backup and subsequent >> incr/diff backups. >> >> During the restore of the full backup, you create a table mapping the unique >> ids to the full paths. Then during the restores of the incr/diff backups, you >> can search the table for each unique id being restored and decide if the file >> is new or renamed (or newly hard-linked). For directories you can check the >> list of names in that directory to detect deleted or renamed files. >> >> This only works on filesystems where renaming a file will change its ctime (or >> some other property) and where deleting a file will change the mtime (or some >> other property) of its directory. >> >> This is how ufsdump and star work. >> Siju> Thanks a million Martin for the explanation but it seems a little Siju> complicating for me at present. The only backup utility I ever used is Siju> the windows one. Siju> There you can take a normal backup first ( full backup) and then take Siju> differential backup every time and if you restore a differential Siju> backup you will get exactly the same contents that was there at the Siju> time the differential backup was taken. Siju> Is there no utility in Linux that will simply do this??? Yes, AFAIK ufsdump and star (http://freshmeat.net/projects/star/) can both do it. They don't have any volume management facilities like Bacula does though. __Martin ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
