HAproxy is a high-performance and highly-robust TCP and HTTP load balancer which provides cookie-based persistence, content-based switching, advanced traffic regulation with surge protection, automatic failover, run-time regex-based header control, Web-based reporting, advanced logging to help trouble-shooting buggy applications and/or networks, and a few other features. Its own event-driven state machine achieves 20,000 hits per second and surpasses GigaEthernet on modern hardware, even with tens of thousands of simultaneous connections. License: GNU General Public License (GPL) Changes: Several minor bugs have been fixed. A major bug that might have caused object truncation under Linux 2.6 with sepoll and slow servers has been fixed. It is now possible to prepend the "no" keyword in front of options. The GNU Makefile has been rewritten to become more distribution packager friendly. The configuration manual has received a large update, and is almost complete with 158 pages of detailed keywords and options.

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