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Re: raid10 hard disk choice

From: Merlin Moncure <mmoncure(at)gmail(dot)com>
To: Linos <info(at)linos(dot)es>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: raid10 hard disk choice
Date: 2009-05-21 14:25:32
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Thu, May 21, 2009 at 8:47 AM, Linos <info(at)linos(dot)es> wrote:
> Hello,
>        i have to buy a new server and in the budget i have (small) i have to
> select one of this two options:
> -4 sas 146gb 15k rpm raid10.
> -8 sas 146gb 10k rpm raid10.
> The server would not be only dedicated to postgresql but to be a file
> server, the rest of options like plenty of ram and battery backed cache raid
> card are done but this two different hard disk configuration have the same
> price and i am not sure what it is better.
> If the best option it is different for postgresql that for a file server i
> would like to know too, thanks.

I would say go with the 10k drives.  more space, flexibility (you can
dedicate a volume to WAL), and more total performance on paper.  I
would also, if you can afford it and they fit, get two small sata
drives, mount raid 1 and put the o/s on those.


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