From: Bruce Momjian <bruce@momjian.us>
Message-Id: <200611210322.kAL3Mqp28549@momjian.us>
Subject: Re: [Pgcluster-general] PostgreSQL Documentation of
In-Reply-To: <4561FCBD.6050900@bluegap.ch>
To: Markus Schiltknecht <markus@bluegap.ch>
Date: Mon, 20 Nov 2006 22:22:52 -0500 (EST)
CC: a.mitani@sra-europe.com, pgsql-docs@postgresql.org,
	pgcluster-general@pgfoundry.org
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Markus Schiltknecht wrote:
> In the very same paper, they define what a Cluster is for them: "A
> cluster is a group of independent servers that cooperate as a single
> system. The primary cluster components are processor nodes, a cluster
> interconnect, and a shared disk subsystem. The clusters share disk
> access and resources that manage data, but the distinct hardware cluster
> nodes do not share memory."
> 
> Thus, Oracle RAC seems to be a shared disk solution. Only in conjunction
> with their OCFS, you could probably call it a shared-nothing solution,
> but it's certainly not a shared-memory thing.
> 
> I'd vote for explaining these terms in the PostgreSQL documentation, as
> there seems to be a lot of confusion regarding these terms.

OK, but how does explaining the terms help our users?

-- 
  Bruce Momjian   bruce@momjian.us
  EnterpriseDB    http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +