This past week I have been working with 2 Web2.0 startups - members of Sun Startup Essentials, they get the support for free - that are looking at improving the response time of their web site.
We've been working at understanding how they servers behave today and what could prevent their application to scale, which led me to show how to run a quick diagnostic on an existing system and to restate some key fundamentals in terms of scalability.
Let's start by the fundamentals.
Any piece of software is nothing else than a set of instructions that need 2 things: computing units to execute on, and a fast access to data.
Computing units are available in the form of a hardware threads located on a processor. The number of threads that a server makes available to the application depends on the number of processors on the server, the number of …[Read more]