On 10/11/2013 02:58 AM, Richard van Denzel wrote:
> Hi All,
>
> I am seeing the same kind of behaviour on a Windows 2012 cluster, which
> from time to time backs-up the entire volume, without anything appently
> being changed.
> One of the answers I got was that there might be a group policy updating
> security descriptors which triggers TSM to back them all up again.
>


When you change ACLs, the files get backed up again, certainly.

Only a modest set of permissions on a file can be recorded faithfully in
the TSM database.  If you do additional permissions ( quite common in
winland ) then the ACLs are recorded in an addendum to the file, on the
storage pool.  This means that, if the extended permissions change, the
whole file must be re-backed-up.

So, it's not really a mystery why an heritable change at the root of a
FS would cause a resending of the whole FS.


- Allen S. Rout