Received: from localhost (maia-5.hub.org [200.46.204.182])
	by postgresql.org (Postfix) with ESMTP id C61C09FB551
	for <pgsql-performance-postgresql.org@postgresql.org>;
	Wed,  7 Mar 2007 11:49:13 -0400 (AST)
Received: from postgresql.org ([200.46.204.71])
	by localhost (mx1.hub.org [200.46.204.182]) (amavisd-new, port 10024)
	with ESMTP id 31580-05 for
	<pgsql-performance-postgresql.org@postgresql.org>;
	Wed,  7 Mar 2007 11:49:03 -0400 (AST)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.4
Received: from mail3.ecircle.de (mail3.ecircle.de [195.140.186.206])
	by postgresql.org (Postfix) with ESMTP id 7DF8F9FB30A
	for <pgsql-performance@postgresql.org>;
	Wed,  7 Mar 2007 11:49:09 -0400 (AST)
Received: from einstein.muc.ecircle.de (einstein.muc.ecircle.de [192.168.1.7])
	by mail3.ecircle.de (READY) with ESMTP id 9073555C044;
	Wed,  7 Mar 2007 16:49:07 +0100 (CET)
Received: from [192.168.1.91] ([192.168.1.91]) by einstein.muc.ecircle.de with
	Microsoft SMTPSVC(6.0.3790.1830); Wed, 7 Mar 2007 16:49:07 +0100
Subject: Re: compact flash disks?
From: Csaba Nagy <nagy@ecircle-ag.com>
To: Carlos Moreno <moreno_pg@mochima.com>
Cc: postgres performance list <pgsql-performance@postgresql.org>
In-Reply-To: <45EEDED8.9000804@mochima.com>
References: <HCEPKPMCAJLDGJIBCLGHOEBCHEAA.james@mansionfamily.plus.com>
	<E1HOxqf-0005Mn-Uw@elasmtp-kukur.atl.sa.earthlink.net>
	<45EEDED8.9000804@mochima.com>
Content-Type: text/plain
Message-Id: <1173282547.9058.36.camel@coppola.muc.ecircle.de>
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.6 (1.4.6-2) 
Date: Wed, 07 Mar 2007 16:49:07 +0100
Content-Transfer-Encoding: 7bit
X-OriginalArrivalTime: 07 Mar 2007 15:49:07.0376 (UTC)
	FILETIME=[23D1BB00:01C760D0]
X-Virus-Scanned: Maia Mailguard 1.0.1
X-Spam-Status: No, hits=0.096 tagged_above=0 required=5 tests=AWL, BAYES_50,
	SPF_PASS
X-Spam-Level: 
X-Archive-Number: 200703/155
X-Sequence-Number: 23560

> Or are these Flash disks so slow that they compare to the HD's latency 
> figures?

On sequential read speed HDs outperform flash disks... only on random
access the flash disks are better. So if your application is a DW one,
you're very likely better off using HDs.

Cheers,
Csaba.