[OpenAFS] Strange sizes of incremental volume dumps

Derrick Brashear shadow@gmail.com
Thu, 12 Mar 2009 17:07:06 -0400

On Wed, Mar 11, 2009 at 7:08 PM, Sergio Gelato
<Sergio.Gelato@astro.su.se> wrote:
> * Friedrich Delgado Friedrichs [2009-03-11 16:30:53 +0100]:
>> Today we noticed that the size of the incremental dumps is non-zero
>> for some volumes which have not changed in quite a while.
> [...]
>> We found some other volumes that had not changed since March 9th, and
>> there doesn't seem to be a relation between the size of the full and
>> incremental dumps.
> [...]
>> Can anybody explain this? Is it a bug, a feature, a configuration
>> error?
> Feature. Incremental dumps always contain a full dump of all directory vnodes.
> That way one knows which files have been deleted (or renamed) since the
> last full dump.

There is a switch to not dump directories which have not changed, but
it's optional to use.