>>> On Wed, Nov 14, 2007 at 4:08 PM, in message
<3edb6f2c0711141408p206150ebobec87ecd203243e3@mail.gmail.com>, "Cristiano
Marques" <proffsmile@gmail.com> wrote:
> I have necessity of integrate a data base
> Sybase and data base Postgresql. The propose is migration data of
> approximate 7000 tables.
>
> I like make cluster of two bases.
>
> Is possible?
We're near the end of migrating our 100 databases from Sybase to
PostgreSQL, so I might be able to give you some hints. To know
where to even start, I'd have to know more about your software
environment; the conversion itself is not all that hard, but
getting the same version of the software to run against both
products was a little tricky, even using a framework designed
with portability as a very high priority. (If you just scatter
the SQL code around your applications in string literals, you're
going to have a very hard time of it.)
For a while we actually ran our web site with the renderers doing
load balancing between Sybase and PostgreSQL databases. The
exact same code was used for both except for a portability layer
of a few hundred lines of code for each product and (of course)
the JDBC drivers. So yes, it is *possible*.
-Kevin