Re: Performance techniques used in AWS

[Pascal Obry <pascal@obry.net>]

Le 13/06/2011 07:48, R. Tyler Croy a écrit :
> I asked this in #Ada and couldn't find any decent documentation on some of
> the techniques used in AWS to make it perform as well as it apparently
> does (at least according to Thomas' silly benchmarks:<http://wiki.ada-
> dk.org/index.php/AWS_vs_node.js>)
>
> Surely beyond simple tasking there's some interesting approaches AWS must
> be using to make it fast (I don't have the time nor expertise to figure it
> out on my own)

Sadly I fear there is no magic. I have never ever tried to build 
something fast in fact and never tried to optimized things a lot. I've 
always been concentrated to provide a simple and sound design. The heart 
of AWS has almost not been changed since it inception. I was the first 
surprised to see it being so fast.

Note that Dmitriy Anisimkov already reported long time ago very good 
response time.

I've seen so many applications molested to gain some speed without 
testing properly first... AWS is not in this category.

The heart of the web server design is quite simple: a single queue for 
the incoming requests. Those requests are dispatched to a free task 
taken from a a poll. That's pretty all there is about it.

Pascal.

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