Re: Replication

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От Eugene Ogurtsov
Тема Re: Replication
Дата
Msg-id 4671F6CA.2090908@swsoft.com
обсуждение исходный текст
Ответ на Replication  ("Craig A. James" <cjames@emolecules.com>)
Список pgsql-performance
What about "Daffodil Replicator" - GPL -
http://sourceforge.net/projects/daffodilreplica/


--
Thanks,

Eugene Ogurtsov
Internal Development Chief Architect
SWsoft, Inc.



Craig A. James wrote:
> Looking for replication solutions, I find:
>
> Slony-I
>  Seems good, single master only, master is a single point of failure,
>  no good failover system for electing a new master or having a failed
>  master rejoin the cluster.  Slave databases are mostly for safety or
>  for parallelizing queries for performance.  Suffers from O(N^2)
>  communications (N = cluster size).
>
> Slony-II
>  Seems brilliant, a solid theoretical foundation, at the forefront of
>  computer science.  But can't find project status -- when will it be
>  available?  Is it a pipe dream, or a nearly-ready reality?
>
> PGReplication
>  Appears to be a page that someone forgot to erase from the old GBorg
> site.
>
> PGCluster
>  Seems pretty good, but web site is not current, there are releases in
> use
>  that are not on the web site, and also seems to always be a couple steps
>  behind the current release of Postgres.  Two single-points failure
> spots,
>  load balancer and the data replicator.
>
> Is this a good summary of the status of replication?  Have I missed
> any important solutions or mischaracterized anything?
>
> Thanks!
> Craig
>
> (Sorry about the premature send of this message earlier, please ignore.)
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster

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