From: Michael Stone <mstone+postgres@mathom.us>
To: pgsql-performance@postgresql.org
Subject: Re: Huge Data sets, simple queries
Date: Sun, 29 Jan 2006 10:43:24 -0500
Message-ID: <20060129154323.GA9976@mathom.us> (raw)
In-Reply-To: <9e4684ce0601290325p4f284c57ndeaae13e6ce58fd7@mail.gmail.com>
References: <007101c623a9$82207c10$0200a8c0@videobox>
<C0001F60.1B354%llonergan@greenplum.com>
<9e4684ce0601290325p4f284c57ndeaae13e6ce58fd7@mail.gmail.com>
On Sun, Jan 29, 2006 at 12:25:23PM +0100, hubert depesz lubaczewski wrote:
>hmm .. do i understand correctly that you're suggesting that using
>raid 10 and/or hardware raid adapter might hurt disc subsystem
>performance? could you elaborate on the reasons, please?
I think it's been fairly well beaten to death that the low-end hardware
raid adapters have lousy performance. It's not until you get into the
range of battery-backed disk caches with 512M+ and multiple I/O channels
that hardware raid becomes competitive with software raid.
Mike Stone
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To: pgsql-performance@postgresql.org
Cc: mstone+postgres@mathom.us
Subject: Re: Huge Data sets, simple queries
In-Reply-To: <20060129154323.GA9976@mathom.us>
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