Re: [PERFORM] Arguments Pro/Contra Software Raid

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Douglas McNaught <doug(at)mcnaught(dot)org>
Cc: Vivek Khera <vivek(at)khera(dot)org>, "Pgsql-Performance ((E-mail))" <pgsql-performance(at)postgresql(dot)org>, PostgreSQL General <pgsql-general(at)postgresql(dot)org>
Subject: Re: [PERFORM] Arguments Pro/Contra Software Raid
Date: 2006-05-09 18:43:16
Message-ID: 4460E2C4.2020804@commandprompt.com
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Douglas McNaught wrote:
> Vivek Khera <vivek(at)khera(dot)org> writes:
>
>> On May 9, 2006, at 11:51 AM, Joshua D. Drake wrote:
>>
>>> And dollar for dollar, SCSI will NOT be faster nor have the hard
>>> drive capacity that you will get with SATA.
>> Does this hold true still under heavy concurrent-write loads? I'm
>> preparing yet another big DB server and if SATA is a better option,
>> I'm all (elephant) ears.
>
> Correct me if I'm wrong, but I've never heard of a 15kRPM SATA drive.

Best I have seen is 10k but if I can put 4x the number of drives in the
array at the same cost... I don't need 15k.

Joshua D. Drake

>
> -Doug
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>

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