Finding the size of directory with multiply hardlinked files
Roberto Ragusa
mail at robertoragusa.it
Fri Mar 14 17:46:15 UTC 2008
Dean S. Messing wrote:
> 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.
du -s -c backup_A backup_B
I use that to do exactly what you are want (hardlinked backups).
The first result is the space occupied by A, the second
result is the _additional_ space occupied by B.
You can also go beyond two dirs.
du -s -c backup_A backup_B backup_C backup_D
But I find this one more useful:
du -s -c backup_D backup_C backup_B backup_A
because the result
10G backup_D
600M backup_C
300M backup_B
400M backup_A
tells me that if I delete the oldest backup
I free 400M, and I can free 700M if I delete
the two oldest backups, etc.
You can play with something like:
du -s -c `ls | sort -r`
Best regards.
--
Roberto Ragusa mail at robertoragusa.it
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