From: alfranio correia junior <alfranio@lsd.di.uminho.pt>
To: Jim C. Nasby <jnasby@pervasive.com>
Cc: Markus Schiltknecht <markus@bluegap.ch>
Cc: Christopher Browne <cbbrowne@acm.org>
Cc: pgsql-hackers@postgresql.org
Subject: Re: standard interfaces for replication providers
Date: Thu, 10 Aug 2006 18:29:59 +0100
Message-ID: <44DB6D17.4040902@lsd.di.uminho.pt> (raw)
In-Reply-To: <20060809185609.GK40481@pervasive.com>
References: <44D30B31.2070403@lsd.di.uminho.pt>
<200608041733.24228.jop@lsd.di.uminho.pt>
<44D70EDA.9060602@bluegap.ch>
<200608071940.26750.jop@lsd.di.uminho.pt>
<44D89EA5.5090703@bluegap.ch>
<87irl3uqgx.fsf@wolfe.cbbrowne.com>
<44D8D334.5050808@bluegap.ch>
<44D8D9DE.50000@lsd.di.uminho.pt>
<44D98FCF.90408@bluegap.ch>
<20060809185609.GK40481@pervasive.com>
>
> Why reinvent the wheel for everything if there was an interface that
> offered some of the needed functionality? Maybe PostgreSQL-R is simply
> too deep in the database for any of this to be useful, but I'm 99%
> certain that Slony could make use of some of this stuff, such as a hook
> on tuples being written out. Likewise, if there were hooks for WAL
> records and a way to inject WAL info into a backend it probably wouldn't
> be too hard to build WAL-based replication on top of that. Heck, PITR
> could probably be refactored to use such hooks.
>
Yeah !!!
:-)
The idea is to provide means to inject things at different levels
(statement,
parsed statements, plans, tuples, logs -wal).
So the GAPI provides a generic and standard interface
that enables any application to retrieve information at different
levels and inject information at different levels.
> One of the great things about Oracle is that they expose a hell of a lot
> of the technology they use to build features like replication; ie: take
> a look at DBMS_*.
>
If I am not wrong such procedures are only for administrative purpose.
For instance,
we cannot insert things in a queue to be replicated.
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To: pgsql-hackers@postgresql.org
Cc: alfranio@lsd.di.uminho.pt, jnasby@pervasive.com, markus@bluegap.ch, cbbrowne@acm.org
Subject: Re: standard interfaces for replication providers
In-Reply-To: <44DB6D17.4040902@lsd.di.uminho.pt>
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