© Copyright IBM Corp. 2005. All rights reserved. 199
Chapter 6. Tuning the IBM HTTP Server
(powered by Apache)
Through the various transitions of Web servers for the iSeries, the fundamental base in which
to work from has, for the most part, always been the IBM HTTP Server. Underneath the
covers, it has more or less been equated to the famous and now universally accepted Apache
Web server.
The Apache Web server has been around for nearly 10 years and is currently the most widely
used among the top servers. Furthermore, it is freeware, open-source software, and highly
configurable and easily extendable. You can find additional information about Apache on the
Web at:
So why do we call it IBM HTTP Server (powered by Apache)? This is because the Apache on
the iSeries is based on the open-source server code (version 2.0), but not the actual source
code. Additional enhancements for the iSeries have been made. This chapter focuses on how
to use the HTTP Server (powered by Apache), and not solely the previous versions of the IBM
HTTP Server. Reference to the HTTP Server in this chapter imply powered by Apache.
This chapter goes deep into the performance issues centered around the HTTP Server. In
particular, it sifts through the following areas:
Web server performance
Persistent connections
Secure Sockets Layer (SSL) and Transport Layer Security (TLS)
HTTP server tuning options
Static content location

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