apache1.3/2.0/2.2版本的比较

Overview of New Features in Apache 1.3

Apache modules may now be loaded at runtime; this means that modules can be loaded into the server process space only when necessary, thus overall memory usage by Apache will be significantly reduced. DSO currently is supported on FreeBSD, OpenBSD, NetBSD, Linux, Solaris, SunOS, Digital UNIX, IRIX, HP/UX, UnixWare, NetWare, AIX, ReliantUnix and generic SVR4 platforms.

Overview of new features in Apache 2.0

Unix Threading

On Unix systems with POSIX threads support, Apache can now run in a hybrid multiprocess, multithreaded mode. This improves scalability for many, but not all configurations.

New module in Apache 2.0. This module is an interface to the SSL/TLS encryption protocols provided by OpenSSL.

New module in Apache 2.0. This module allows supporting browsers to request that content be compressed before delivery, saving network bandwidth.

Overview of new features in Apache 2.2

Large File Support

is now built with support for files larger than 2GB on modern 32-bit Unix systems. Support for handling >2GB request bodies has also been added.

Caching

, , and have undergone a lot of changes, and are now considered production-quality. has been introduced to clean up setups.

Graceful stop

The , and MPMs now allow to be shutdown gracefully via the signal. The directive has been added to specify an optional timeout, after which will terminate regardless of the status of any requests being served.

Event MPM

The MPM uses a separate thread to handle Keep Alive requests and accepting connections. Keep Alive requests have traditionally required httpd to dedicate a worker to handle it. This dedicated worker could not be used again until the Keep Alive timeout was reached.

Proxying

The new module provides load balancing services for . The new module adds support for the Apache JServ Protocol version 1.3 used by .