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From: Markus Schiltknecht <[email protected]>
To: Joshua D. Drake <[email protected]>
Cc: Bruce Momjian <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Subject: Re: [Pgcluster-general] PostgreSQL Documentation of
Date: Tue, 21 Nov 2006 23:31:24 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>

Joshua D. Drake wrote:
> On Tue, 2006-11-21 at 16:51 -0500, Bruce Momjian wrote:
>> Markus Schiltknecht wrote:
>>> Hi,
>>>
>>> Bruce Momjian wrote:
>>>> I feel the shared-* issue splits us up like master/slave and
>>>> multi-master splits up
>>> No, not quite. To sum up, I'd say the following combinations make sense:
>>>
>>> sync, multi-master replication on shared-memory cluster (which is much 
>>> like a super-computer. With shared memory distributing locks does not 
>>> cost much - beside marketing, there is probably not much sense in 
>>> calling this a cluster at all).
>> Wow, how is that different than an multi-CPU server?
> 
> You can't have 1000 cpus :).. You can have 1000 dual core servers.

Have them share all their memory is the challenge, though. Ask IBM, they 
certainly do big-irons like that.

As I said, it's like a super-computer, but you can also see it as a 
cluster of CPUs with shared memory and shared disks. It's all just a 
matter of your point of view.

Regards

Markus

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