From: Joshua D. Drake <jd@commandprompt.com>
To: Craig James <craig_james@emolecules.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Replication
Date: Thu, 14 Jun 2007 16:22:25 -0700
Message-ID: <4671CDB1.3090708@commandprompt.com> (raw)
In-Reply-To: <4671CBBA.6010104@emolecules.com>
References: <4671CBBA.6010104@emolecules.com>
Craig 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).
Yep
>
> 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?
>
Dead
> PGReplication
> Appears to be a page that someone forgot to erase from the old GBorg site.
>
Dead
> 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.
>
Slow as all get out for writes but cool idea
> Is this a good summary of the status of replication? Have I missed any
> important solutions or mischaracterized anything?
>
log shipping, closed source solutions
> Thanks!
> Craig
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster
>
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, craig_james@emolecules.com
Subject: Re: Replication
In-Reply-To: <4671CDB1.3090708@commandprompt.com>
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