Re: raid10 hard disk choice

On Thu, May 21, 2009 at 8:47 AM, Linos <info@linos.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.

merlin