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Running the "performance" policy on highly heterogenous systems yields bad choices when there are sufficiently more small than big cores, and/or when there are multiple cluster types, because on such setups, the higher the frequency, the lower the number of cores, despite small differences in frequencies. In such cases, we quickly end up with "performance" only choosing the small or the medium cores, which is contrary to the original intent, which was to select performance cores. This is what happens on boards like the Orion O6 for example where only the 4 medium cores and 2 big cores are choosen, evicting the 2 biggest cores and the 4 smallest ones. Here we're changing the sorting method to sort CPU clusters by average per-CPU capacity, and we evict clusters whose per-CPU capacity falls below 80% of the previous one. Per-core capacity allows to detect discrepancies between CPU cores, and to continue to focus on high performance ones as a priority.
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.