Also, I have heard a lot of people reocommending RAID 0+1 or 1+0 as a
good mix of reliability and performance.
---------------------------------------------------------------------------
Curt Sampson wrote:
> On Thu, 23 Jan 2003, David Kennedy wrote:
>
> > This weekend I will be building a couple of new postgres database servers
> > under RH7.3, and I am currently deciding between 2 different configuration
> > options. The new servers feature hot-swappable RAID w/ 3 hard drives in
> > each.
>
> It depends on what you need in terms of reliability and performance.
>
> Best performance (assuming non-insignifcant write load):
>
> Put the OS and DB on the first two drives, striped (RAID0), and the
> logs on the third drive.
>
> Best safety maximum capacity:
>
> Put everything on a single RAID5 across all three drives. (RAID5 on
> three drives is likely to be significantly slower than a single disk
> or mirrored pair would be, though.)
>
> Best safety with good performance:
>
> Mirror two drives (RAID1) and put everything on the pair. Use the
> third drive as a hot spare for the mirrored pair.
>
> cjs
> --
> Curt Sampson <cjs@cynic.net> +81 90 7737 2974 http://www.netbsd.org
> Don't you know, in this new Dark Age, we're all light. --XTC
>
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