Re: Phoronix article slaming BTRFS

[Chris Mason <chris.mason@oracle.com>]

On Tue, Jun 23, 2009 at 04:53:59PM +0200, Sander wrote:
> Chris Mason wrote (ao):
> > Jens Axboe tried to reproduce the phoronix results on his ocz drive,
> > and generally found that each run was slower than the last regardless
> > of which mount options were used. This isn't entirely surprising, but
> > it did make it very difficult to nail down good or bad performance.
> 
> The performance should stabilize within a handful max fills I believe?
> 
> There should be a moment where things don't get more complicated for the
> controller I thought.

That's the idea, but every device is different, and they are very
complex.  Especially for write performance, tuning is a long and complex
process...a simple benchmark run where you do three tries and average
them isn't going to give you a great picture of drive performance.

-chris