benchmarkingblog

Benchmarking and Systems Performance

Briskets and Benchmarks

leave a comment »

So I’ve been thinking a lot about briskets lately.

I normally cook a 2-3 pound one but with ten guests to serve I just had to go bigger. So I wrestled home a 5 and a half pounder. And that’s when the fun began.

I normally put the 2-3 pounder in the oven at 300 degrees for about 3 hours. I’ve done that for decades. My mother’s done that for decades. But just how long should you cook a 5 and a half pounder?

Most sites on the internet say 1 hour per pound. And James Beard confirmed it. But just how can that be? Is that saying that if you got a 1 pounder, you would just cook it for an hour. Wow would that be tough. And would you need to cook a 12 pounder from sunrise to sunset? Are we saying that there is a true linear relationship here?

And that’s when I started thinking of curves. And what kind of cooking curve a brisket would have. Just this weekend I was wishing I could have invented Euler’s polyhedral formula. And now I may be able to claim the Brisket Curve.

The Brisket Curve is important for benchmarks because that’s the way scalability of systems works too. Sometimes we make linear predictions on performance, though the scalability will surely not back it up. Many times twice the size of a system may only yield 1.7, 1.6, or even less than 1.5 times the performance.

Which is why it is so notable that IBM takes scalability very seriously and has many proof points to prove it — including outstanding benchmark results demonstrating over 90%, near linear scaling with Power Systems and DB2.

P.S. I cooked the brisket for 5 and a half hours. It was linear. And it was superb.

************************************************

The postings on this site solely reflect the personal views of the author and do not necessarily represent the views, positions, strategies or opinions of IBM or IBM management.

technorati tags: , , , , ,,,,,,,,,

About these ads

Written by benchmarkingblog

April 19, 2011 at 4:43 pm

Posted in POWER7, SAP, scalability

Tagged with

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: