2d6b5c7a60
Previously the conn_hash_node was placed outside the connection due to the big size of the eb64_node that could have negatively impacted frontend connections. But having it outside also means that one extra allocation is needed for each backend connection, and that one memory indirection is needed for each lookup. With the compact trees, the tree node is smaller (16 bytes vs 40) so the overhead is much lower. By integrating it into the connection, We're also eliminating one pointer from the connection to the hash node and one pointer from the hash node to the connection (in addition to the extra object bookkeeping). This results in saving at least 24 bytes per total backend connection, and only inflates connections by 16 bytes (from 240 to 256), which is a reasonable compromise. Tests on a 64-core EPYC show a 2.4% increase in the request rate (from 2.08 to 2.13 Mrps).
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.