Re: Advice on RAID card

From: Dave Cramer <pg(at)fastcrypt(dot)com>
To: Michael Ben-Nes <miki(at)canaan(dot)co(dot)il>
Cc: PFC <lists(at)boutiquenumerique(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Advice on RAID card
Date: 2005-09-25 14:57:56
Message-ID: ABE6B997-2C1E-43B1-9F18-28F54B1620FE@fastcrypt.com
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I would think software raid would be quite inappropriate considering
postgres when it is working is taking a fair amount of CPU as would
software RAID. Does anyone know if this is really the case ?

Dave
On 25-Sep-05, at 6:17 AM, Michael Ben-Nes wrote:

> I would consider Software Raid
>
>
> PFC wrote:
>
>
>>
>> Hello fellow Postgresql'ers.
>>
>> I've been stumbled on this RAID card which looks nice. It is a
>> PCI-X SATA Raid card with 6 channels, and does RAID 0,1,5,10,50.
>> It is a HP card with an Adaptec chip on it, and 64 MB cache.
>>
>> HP Part # : 372953-B21
>> Adaptec Part # : AAR-2610SA/64MB/HP
>>
>> There' even a picture :
>> http://megbytes.free.fr/Sata/DSC05970.JPG
>>
>> I know it isn't as good as a full SCSI system. I just want to
>> know if some of you have had experiences with these, and if this
>> cards belong to the "slower than no RAID" camp, like some DELL
>> card we often see mentioned here, or to the "decent performance
>> for the price" camp. It is to run on a Linux.
>>
>> Thanks in advance for your time and information.
>>
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>
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