Re: Performance techniques used in AWS

[Simon Wright <simon@pushface.org>]

"R. Tyler Croy" <tyler@linux.com> writes:

> What I'm trying to work out in my head is how to build an application
> (in Ada) that can compete[0] effectively with a libev-based program
> written in C. The advantage that libev brings to the table is that
> this program (in C) can very easily handle and respond to tens of
> thousands of concurrent connections.
>
> Unlike AWS or most web servers however, these connections are not
> HTTP- based and do not follow the traditional Request->Response->Close
> pattern of most of the HTTP world, but rather sockets are held open
> for minutes even hours at a time.

Nowadays most HTTP connections are persistent, either because of
HTTP/1.0's "Connection: Keep-Alive" or the absence of the newer
"Connection: close".

I guess the performance will depend heavily on select(2) vs poll(2) or
epoll.