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Re: advice on raid controller

From: Ron Johnson <ron(dot)l(dot)johnson(at)cox(dot)net>
To: PgSQL Performance ML <pgsql-performance(at)postgresql(dot)org>
Subject: Re: advice on raid controller
Date: 2003-09-27 19:53:51
Message-ID: 1064692431.24519.59.camel@haggis (view raw or flat)
Thread:
Lists: pgsql-performance
On Sat, 2003-09-27 at 12:24, Richard Jones wrote:
> Hi, i'm on the verge of buying a "MegaRAID SCSI 320-2" raid controller.
> I need it to build a db server using 4x ultra320 scsi disks
> i'm thinking raid 1+0 but will try with raid5 too and compare
> 
> Does anyone have any experience with this model, good or bad i'd like to 
> know.. thanks :)
> 
> as seen:
> http://uk.azzurri.com/product/product.cgi?productId=188

I don't see anything on that page regarding RAM cache.  It's been
my experience that RAID 5 needs a *minimum* of 128MB cache to have
good performance.

-- 
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Ron Johnson, Jr. ron(dot)l(dot)johnson(at)cox(dot)net
Jefferson, LA USA

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* Parental apathy & the public education system
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