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mod_cluster

Project mod_cluster is a httpd-based load-balancer. It uses a communication channel to forward requests from httpd to one of a set of application server nodes. Unlike mod_jk and mod_proxy, mod_cluster leverages an additional connection between the application server nodes and httpd to transmit server-side load-balance factors and lifecycle events back to httpd. This additional feedback channel allows mod_cluster to offer a level of intelligence and granularity not found in other load-balancing solutions.

Mod_cluster boasts the following advantages over other httpd-based load-balancers:

  • Dynamic configuration of httpd workers
  • Server-side load balance factor calculation
  • Fine grained web-app lifecycle control
  • AJP is optional

https://modcluster.io

Project Structure

native (native httpd modules)

Reverse Proxy (httpd) Modules

To build the native component from the sources you need a C compiler and the following tools:

  • m4
  • perl
  • autoconf
  • automake
  • libtool
  • make
  • patch
  • python

Of course the make and the patch must be GNU ones. For example on Solaris you need:

  • SMCm4 (requires libsigsegv and libgcc34)
  • SMCperl
  • SMCautoc
  • SMCautom
  • SMClibt
  • SMCmake
  • SMCpatch
  • SMCpython

All can be downloaded from http://www.sunfreeware.com/.

License

This software is distributed under the terms of the GNU Lesser General Public License (see lgpl.txt).

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mod_cluster is an intelligent Apache httpd-based load-balancer

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