Re: Replication

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
>
>
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