Re: replication in Postgres

From: Ow Mun Heng <Ow(dot)Mun(dot)Heng(at)wdc(dot)com>
To: Chris Browne <cbbrowne(at)acm(dot)org>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: replication in Postgres
Date: 2008-01-03 01:02:36
Message-ID: 1199322156.4569.3.camel@neuromancer.home.net
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On Mon, 2007-11-26 at 12:39 -0500, Chris Browne wrote:
> jlar310(at)gmail(dot)com ("Jeff Larsen") writes:
> Unfortunately, the only way to make things deterministic (or to get
> from "near real time" to "*GUARANTEED* real time") is to jump to
> synchronous replication, which is not much different from 2PC (Two
> Phase Commit), and which is certain to be prohibitively expensive
> across a WAN.
>

2PC is costly and will make things slow overall if there ever was issues
with the WAN. And to alleviate that, I believe one would have to get a
dedicated WAN line just for the syncing process. Expensive.. Anyone can
Spell S-L-A??

> At this point, I tend to get visions of Tom Cruise telling Jack
> Nicholson, "I want real time replication!", and getting the response:
> "You can't HANDLE real time replication!"

Woo.. I like this movie. _best_ court scene _ever_!

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