Обсуждение: Distributed database with postgres

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Distributed database with postgres

От
Juan Miguel
Дата:
Hello,

First of all, sorry about my english. I'm searching a tool for
implementing a distributed DB in postgres. I've found "pgreplicator"
(http://pgreplicator.sourceforge.net/). I figure out that the last
revision of the project was in 2001, and I don't know if the project
goes on.

I have not tested pgreplicator yet, but I would know what do you think
about this software (if you know it) or other ones that give you the way
for mounting a distributed DB.

I have found Slony, but it is a master / slave replication system, and I
think it cannot works as a pure distributed DB.

By other way, what do you think about the state of the distributed DB
tools for postgres ?
What distributed DB tools for postgres exist ?
Are matures ?
What are their fails ?

Thank you very much.

Re: Distributed database with postgres

От
"Jim C. Nasby"
Дата:
On Thu, Jan 19, 2006 at 03:46:25PM +0100, Juan Miguel wrote:
> Hello,
>
> First of all, sorry about my english. I'm searching a tool for
> implementing a distributed DB in postgres. I've found "pgreplicator"
> (http://pgreplicator.sourceforge.net/). I figure out that the last
> revision of the project was in 2001, and I don't know if the project
> goes on.
>
> I have not tested pgreplicator yet, but I would know what do you think
> about this software (if you know it) or other ones that give you the way
> for mounting a distributed DB.
>
> I have found Slony, but it is a master / slave replication system, and I
> think it cannot works as a pure distributed DB.
>
> By other way, what do you think about the state of the distributed DB
> tools for postgres ?
> What distributed DB tools for postgres exist ?
> Are matures ?
> What are their fails ?

Currently your only options for multi-master OSS replication are all
based on query replication, which has some very serious drawbacks (ie:
how do you deal with now()).

Your best bet is probably to wait for Slony-2; it sounds like it's
pretty much exactly what you'd want, unless you need to support remote,
disconnected clients, which I don't think it will handle well.
--
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461