4eb3ff1d3b
For now it seems to work as before, and even when artificially inflating the number of allocatable buffers per stream. The number of allocated slots is always the same as the max number of streams, which guarantees that each stream will find one buffer. we only grant one buffer per stream at this point, since the goal was to replace the existing single rxbuf. A new demux blocking flag, H2_CF_DEM_RXBUF, was added to indicate a failure to get an rxbuf slot from the connection. It was lightly tested (by forcing bl_init() to a lower number of buffers). It is not yet certain whether it's more useful to have a new flag or to reuse the existing H2_CF_DEM_SFULL which indicates the rxbuf is full, but at least the new flag more accurately translates the condition, that may make a difference in the future. However, given that when RXBUF is set, most of the time it results in a failure to find more room to demux and it sets SFULL, for now we have to always clear SFULL when clearing RXBUF as well. This means that most of the time we'll see 3 combinations: - none: everything's OK - SFULL: the unique rx buffer is full - RXBUF || (RXBUF|SFULL): cannot allocate more entries Note that we need to be super careful in h2_frt_transfer_data() because the htx_free_data_space() function doesn't guarantee that the room is usable, so htx_add_data() may still fail despite an apparent room. For this reason, h2_frt_transfer_data() maintains a "full" flag to indicate that a transfer attempt failed and that a new buffer is required. |
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README.md
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.