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HAProxy - Load balancer
9b78e33837
PEER_F_LEARN_PROCESS and PEER_F_LEARN_FINISHED flags are added to help to fix locking issue about peers. Indeed, a peer is able to update the peers "section" state under its own lock. Because the resync task locks all peers at once, there is no conflict at this level. But there is nothing to prevent 2 peers to update the peers state in same time. So it seems there is no real issue here, but there is a theorical thread-safety issue here. And it means the locking mechanism of the peers must be reviewed. In this context, the 2 flags above will help to move all update of the peers state in the scope of resync task. Each peer will be able to update its own state and the resync task will be responsible to update the peers state accordingly. |
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The HAProxy documentation has been split into a number of different files for ease of use. 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)