On Sun, 10 Jun 2012, Ronald F. Guilmette wrote:
What I don't understand (and what I wish someone would enlighten me about) is just this: It would seem that in order to implement these dump levels, dump must be keeping a record somewhere, for each file in the filesystem, of the level at which that file was last dumped. But where is this infor- mation stored, exactly?? I won't be able to sleep until I know.
Only the dates of the levels of backup are stored, in /etc/dumpdates. Then the fact that a file has been dumped is inferred by comparing the file's last mod date with the dates in /etc/dumpdates. See the -T and -u options of the dump man page where this is implied but perhaps not actually stated.
It does occur to me that /etc is not a felicitous place to keep this information, but given the desirability of dumping filesystems in read only state, placing the dump dates in the filesystem itself isn't feasible.
daniel feenberg _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
