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Pen - Load balancer for TCP protocols

Pen is a load balancer for "simple" TCP-based protocols such as HTTP or SMTP. It allows several servers to appear as one to the outside. It automatically detects servers that are down and distributes clients among the available server for high availability and scalable performance.

The load balancing algorithm tracks clients and tries to send them back to the server they visited the last time. The client table has slots (default 2048, settable through command-line arguments). When the table is full, the least recently used one is discarded to make room for the new one. This is superior to a simple round-robin algorithm, which sends a client that connects repeatedly to different servers. This breaks applications including most modern web applications) that maintain state between server connections.

Obtaining

Web page	http://siag.nu/pen/
Source tarball	http://siag.nu/pub/pen/pen-0.15.0.tar.gz
Source information	http://siag.nu/pub/pen/
Latest version	http://siag.nu/pub/pen/LATEST_IS_0.15.0

Version 0.15.0 (stable) released on 2004-07-06

Licensed under The GNU General Public License, Version 2 or later.

This is not a GNU package.

Documentation

User tutorial available from http://siag.nu/pen/howto.shtml

Support contacts

Help List	<[email protected]> <[email protected]> body: subcribe
Developer List	<[email protected]> <[email protected]> body: subcribe
Bug List	<[email protected]> <[email protected]> body: subcribe

Project contacts

Maintainers	Ulric Eriksson <[email protected]>
Developers	Ulric Eriksson <[email protected]>

Related information

Interfaces	daemon, web
Programs	mergelogs
Source languages	C
Related programs	Balance

Entry information

License verified by	Janet Casey <[email protected]> on 2002-01-15
Entry compiled by	Janet Casey <[email protected]>

Categories

The copyright licensing notice below applies to this text. The software described in this text has its own copyright notice and license, which can usually be found in the distribution itself.

Permission is granted to copy, distribute, and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of this license is included in the file COPYING.DOC.

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