f2d7aa8406
There's a configurable limit to the number of messages sent to a peer (tune.peers.max-updates-at-once), but this one is not applied to the receive side. While it can usually be OK with default settings, setups involving a large tune.bufsize (1MB and above) regularly experience high latencies and even watchdogs during reloads because the full learning process sends a lot of data that manages to fill the entire buffer, and due to the compactness of the protocol, 1MB of buffer can contain more than 100k updates, meaning taking locks etc during this time, which is not workable. Let's make sure the receiving side also respects the max-updates-at-once setting. For this it counts incoming updates, and refrains from continuing once the limit is reached. It's a bit tricky to do because after receiving updates we still have to send ours (and possibly some ACKs) so we cannot just leave the loop. This issue was reported on 3.1 but it should progressively be backported to all versions having the max-updates-at-once option available.
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.