Re: Benchmarking.. how can I get more out of my box?

[Holger Kiehl]

On Wed, 8 Mar 2000, Brian Pomerantz wrote:

> 
> I also use write-back, which increased the performance a bit.  The
> current equipment I have is going back to Compaq in a few days but I
> already have more loaners in (they need to be installed).  I'll have 4
> Mylex DAC1164P controllers and 40 10K RPM 18GB drives in 8 cabinets to
> try to get as much performance out of as possible.  My goal is 100MB/s
> on a single node with a maximum of 3 controllers in one node.  I
> really doubt I'll get there as it seems that with the current
> configuration and driver these controllers don't scale well.  I was
> getting around 19MB/s with one chain; adding the second chain only
> gave me another 7MB/s more.  The second chain should have doubled my
> performance, this is why I am nearly certain that I'm hitting a
> read-modify-write sequence on nearly every write.
> 
Why don't you try SW raid?

Holger