On Thu, 2008-03-13 at 19:48 -0700, Dean S. Messing wrote: > I have a sequence of directories that have many multiply > (cross)hardlinked files, and I'd like to see what their > "true" sizes are. These dirs are backup directories > created with something like: > > rsync -a --delete --link-dest=/mnt/bkup/backup_A/ \ > /dir_to_back_up /mnt/bkup/backup_B/ > > By "true" sizes I mean this: > > Say backup_A was created first. If I do `du_true > backup_A' I shd. see its size. Now I delete some files > in "/dir_to_back_up" and create some other new files. > Now I create "backup_B" with the above rsync command. I'd > like for my mythical `du_true' to compute the > incremental change in size from backup_A to backup_B. > > This seems like a non-trivial problem but maybe I'm just > missing something simple. What's wrong with "subtract 'du -s backup_B' from 'du -s backup_A'"? If this isn't what you mean, then you need to explain it better. The concept of files being "in" a directory is just a convenient fiction. Both backup_A and backup_B are just sets of hard links. poc
