Re: Regarding Distributed Database features

From: Andrew Sullivan <ajs(at)crankycanuck(dot)ca>
To: pgsql-advocacy(at)postgresql(dot)org
Subject: Re: Regarding Distributed Database features
Date: 2007-07-13 18:43:59
Message-ID: 20070713184359.GR8844@phlogiston.dyndns.org
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On Fri, Jul 13, 2007 at 02:20:44AM -0400, Chidambaram Janamaddi wrote:
> Can you please let me know whether postgreSQL has
> Distributed Database supporting features?

This depends on what you mean. You can do some of these things via
various tools like dbi-link. That said,

> Which of the Distributed database functionalities are totally or partially
> supported among the following ......................

This sounds like a checklist you got from a marketing website. What
is the problem you are trying to solve?

> - Local autonomy
> - No reliance on a central site

These sounds like you want multimaster replication. Postgres doesn't
do that today (and I know of only one system that really does, which
I couldn't recommend for other reasons).

> - Continuous operation

Depending on what this means, "Yes".

> - Location independence

What does this mean?

> - Fragmentation independence
> - Replication independence

And these don't make any sense to me at all.

> - Distributed query independence
> - Distributed transaction processing

Probably not, but depening on what these mean, maybe "sometimes".

> - Hardware independence
> - Operating system independence
> - Network independence

I think so.

> - Database independence

This one is mystifying to me.

Regards,
A

--
Andrew Sullivan | ajs(at)crankycanuck(dot)ca
I remember when computers were frustrating because they *did* exactly what
you told them to. That actually seems sort of quaint now.
--J.D. Baldwin

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