Re: Setup of four 15k SAS disk with LSI raid controller

raid0 tends to linear scaling so 3 of them should give something close to
300% increased write speed. So i would say 1. but make sure you test your
configuration as soon as you can with bonnie++ or something similar

On Wed, Mar 13, 2013 at 7:43 PM, Niels Kristian Schjødt <
nielskristian(at)autouncle(dot)com> wrote:

> I have a server with 32GB ram, one intel E3-1245 and four 15k SAS disks
> with a BB LSI MegaRaid controller. I wan't the optimal performance for my
> server, which will be pretty write heavy at times, and less optimized for
> redundancy, as my data is not very crucial and I will be running a
> streaming replication along side.
>
> Now what would you prefer:
>
> 1) 3 disks in RAID 0 containing PGDATA + 1 containing SYSTEM and WAL
> 2) All four in RAID 10 containing both PGDATA, SYSTEM AND WAL
> 3) 2 disks in RAID 1 containing PGDATA + 2 disks in RAID 1 containing
> SYSTEM and WAL
> 4) Something different?
>
>
>
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