Re: 7.4?
Hervé Piedvache <herve@elma.fr>
From: Hervé Piedvache <herve@elma.fr>
To: Tom Lane <tgl@sss.pgh.pa.us>, Neil Conway <neilc@samurai.com>
Cc: "Ed L." <pgsql@bluepolka.net>,
Robert Treat <xzilla@users.sourceforge.net>, Joe Tomcat <tomcat@mobile.mp>, PostgreSQL General <pgsql-general@postgresql.org>, Bruce Momjian <pgman@candle.pha.pa.us>, Darren Johnson <darren@up.hrcoxmail.com>, reynaud@elma.fr, pgreplication-general@gborg.postgresql.org
Date: 2003-02-26T10:55:51Z
Lists: pgsql-general
Le Mercredi 26 Février 2003 07:52, Tom Lane a écrit : > Neil Conway <neilc@samurai.com> writes: > > On Tue, 2003-02-25 at 22:44, Ed L. wrote: > >> And do I understand correctly the replication to be eventually > >> included will be an embedded syncronous replication solution based on > >> Postgres-R and the Spread GCS? > > > > No, I don't think that's set in stone (although I can't speak for the > > core team). While I think Postgres-R is promising, there might be room > > for additional replication implementations that cater to different sets > > of requirements. > > There absolutely *is* room for multiple replication implementations. > AFAICS there's no one-size-fits-all approach. I did and still do like > Postgres-R as a pretty useful approach, but it should not be mistaken > for The One True Path. > > Also, there are nontrivial licensing issues involved. The PG-R design > depends on an underlying "group communication" system, which is a > nontrivial bit of software that none of the core team wants to rewrite. > But none of the available GC systems are BSD-license open source. We > had had some hopes of getting Spread to offer BSD terms, but that seems > to have fallen through. So right now, PG-R is on the outside looking > in, as far as inclusion in the core distribution goes :-( > > regards, tom lane You mean the PG-R project will no be included in the PostgreSQL project unless someone rewrite the Spread GCS concept or similar system in a BSD licence ? What a bad news for the community ... ! :o( PG-R seems to be the best integrated solution of the moment ... Still a lot of work ... but Darren and others are making a real good job ! DBMirror or rserv (commercial application) seems to be only triggers, and little demon not included in PostgreSQL system ... as PG-R is ... PostgreSQL really need an official Replication solution to be definitively secured in a productive environnement ... and I think I'm not the only one thinking like that ... looking the survey of Postgres.org web site : http://www.postgresql.org/survey.php?View=1&SurveyID=9 -- Hervé Piedvache Elma Ingénierie Informatique 6 rue du Faubourg Saint-Honoré F-75008 - Paris - France Tel. 33-144949901 fax. 33-144949902