Hi,
The implementation of a set of hooks for efficient synchronous replication
without extensive patching of Postgresql source is now available at:
http://gorda.di.uminho.pt/community/
Note that this is far from a full replication product. It is made available
for early feedback by the Postgresql hacker community and because it is
probably already useful for other projects (e.g. materialized views).
This is the first self-contained component extracted from a working prototype
of replication based on group communication under development by the GORDA
project.
Comments and suggestions welcome,
Regards Alfranio Junior.