tdb_chainlock() in tdb1, tdb2 and tdb_compat ?

[Volker Lendecke]

On Thu, May 10, 2012 at 01:46:08PM +0200, Christian Ambach wrote:
> On 05/10/2012 07:08 AM, Rusty Russell wrote:
> 
> > Since the transition is taking longer than we'd hope (and turning tdb2
> > off again as proposed by Christian isn't going to help), perhaps we
> > should change this and rename everything to tdb2*.  It's not *that*
> > big a change to SAMBA in practice.
> 
> But what about outside users of libtdb? There seem to be various
> projects that rely on libtdb. If we now change the semantics behind
> the existing API, those projects will have to adjust their code as
> well.
> We will have to support libtdb for a while for all of the projects
> depending on it until they have adopted to the TDB2 API.
> 
> So my proposal would be to:
> 1. leave libtdb as it is today
> 1a) make tdb the default again in the build
> 2. introduce tdb2 as new library with the new API
> 2a) add it to the autoconf build
> 2b) maybe leave out the tdb_compat part?
> 3. create a dbwrap_tdb2 layer that will take care of the subtle
> changes in a single place for source3
> 3a) switch source3 code place by place to the new dbwrap, start with
> the ones that will benefit from tdb2 first
> 4. adopt the source4 pieces (I am not familiar with those)
> 5. make tdb2 the default in the build
> 
> And then piece by piece migrate existing code to use tdb2 and once
> all references have been removed, we'll need to encourage other
> projects to follow our approach.

+1

Volker

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