Quoting Jean-Francois <jfsimon1...@gmail.com>:

Hi,

Is it possible to clarify what resides behind the concept of levels regarding
dump(8) ?
For me the level 0 is understood to be a complete dump of all files on at a
given mount point and all subdirectories. But I can't figure out what upper
levels are.

Regards

Dump levels other than 0 allow you to make partial dumps.

I used to do dump level 0's at the start of the month.

Then from Monday to Thursday I'd to dump 9's.  Each dump
would save things from the previous 9 (or 0 the first time).
Friday's I'd do a level 8.

Thus each M-T I'd save the days work, Friday I'd save the
weeks work.  Then at the start of the next month a level 0
dump would make a copy of everything.

Each dump level going downwards saves all the data from
previous (higher) numbered dumps.

--STeve Andre'

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