Re: raidframe and ffs block size interaction

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

On Tue, Sep 27, 2011 at 02:19:56PM -0500, Jonathan A. Kollasch wrote:
> How do you get maximum performance out of a RAID-1 raid(1) and still use
> 2KiB or 4KiB FFS frag sizes?

I've benchmark this a while back. You can find my results here:

http://zhadum.org.uk/2008/07/25/raid-and-file-system-performance-tuning/

In short:
I got the best performance with 128 sectors per stripe unit, a frag-size
of 2KB and a blocksize of 166KB I'm using these settings to this day
and the RAID performane of my NetBSD server is good.

        Kind regards

-- 
Matthias Scheler                                  http://zhadum.org.uk/