[Samba] gencache_notrans.tdb samba 4 migration

[Andrew Bartlett]

On Sat, 2016-07-23 at 19:46 +0200, Trenta sis wrote:
> hi,
> 
> during migration testsfrom samba 3 to samba 4 ad I hve detectec that
> file
> gencache_notrans.tdb that doesnt exist in ou samba 3 installation,
> this
> file appears that is described in migration steps.
> 
> without this file seems samba 4 ad works....
> 
> 
> What is this file? I have todo any action?

No, neither gencache tdb is required for the upgrade, it is just a
cache.  We move records from gencache_notrans.tdb to gencache.tdb
occasionally so that we avoid an expensive fsync() for every cache
store, but have a 'recent' cache that is much more likely not to be
corrupt on startup.

Andrew Bartlett

-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba