October 1998
Intermediate to advanced
374 pages
12h 6m
English
Content preview from Web Performance TuningBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Daemonize It
The best way to get CGI-like behavior, with far greater performance and scalability, is a common Unix technique I call daemonization, after the Unix daemons lurking in the background of every Unix machine waiting for events to handle. The basic idea is this: instead of having a CGI start in response to a query and then die, start up a persistent CGI-like process (a daemon) along with the web server. The daemon can even be on a different machine than the web server. When the web server gets a request pointing at the daemon, it simply connects to the daemon, hands over the request, and waits for the results (while still able to handle other requests).
Daemonization is a feature of servlets in Java. You can start servlets running and connect to them as often as you like, avoiding the overhead of startup, exactly as described previously. The fact that Java is interpreted is less significant than the performance gain derived from leaving the servlet running. Servlets are multithreaded, isolating clients from each other. See Chapter 15 of Java Network Programming, by Elliotte Rusty Harold (O’Reilly & Associates).
A standard method of daemonizing CGIs has been defined by Open Market, called FastCGI (seehttp:// www.fastcgi.com). FastCGI programs are persistent, and they are also extremely scalable, because they can be run on machines other than the originating web server. FastCGI uses a single TCP socket to connect the web server and FastCGI application, unlike the standard ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.