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
slowerthan 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
alllight. --XTC