From: Guy Rouillier <guyr-ml1@burntmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: Planning a new server - help needed
Date: Sun, 30 Mar 2008 22:25:36 -0400
Message-ID: <47F04BA0.9040409@burntmail.com> (raw)
In-Reply-To: <op.t8r6d212cigqcu@apollo13.peufeu.com>
References: <47ECB4F6.1040901@shopzeus.com>
<Pine.GSO.4.64.0803281300240.2521@westnet.com>
<47EE1B1F.20506@mansionfamily.plus.com>
<op.t8r6d212cigqcu@apollo13.peufeu.com>
PFC wrote:
>
>> Why do you claim that 'More platters also means slower seeks
>> and generally slower performance.'?
>
> More platters -> more heads -> heavier head assembly -> slower seek
> time
> But..
> More platters -> higher density -> less seek distance (in mm of head
> movement) -> faster seek time
More platters means more tracks under the read heads at a time, so
generally *better* performance. All other things (like rotational
speed) being equal, of course.
--
Guy Rouillier
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To: pgsql-performance@postgresql.org
Cc: guyr-ml1@burntmail.com
Subject: Re: Planning a new server - help needed
In-Reply-To: <47F04BA0.9040409@burntmail.com>
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