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There is a data model issue in the current pattern design that makes pattern deletion extremely expensive: there's no direct way from a reference to access all indexed occurrences. As such, the only way to remove all indexed entries corresponding to a reference update is to scan all expressions's lists and trees to find a link to the reference. While this was possibly OK when map removal was not common and most maps were small, this is not conceivable anymore with GeoIP maps containing 10M+ entries and del-map operations that are triggered from http-request rulesets. This patch introduces two list heads from the pattern reference, one for the objects linked by lists and one for those linked by tree node. Ideally a single list would be enough but the linked elements are too much unrelated to be distinguished at the moment, so we'll need two lists. However for the long term a single-linked list will suffice but for now it's not possible due to the way elements are removed from expressions. As such this patch adds 32 bytes of memory usage per reference plus 16 per indexed entry, but both will be cut in half later. The links are not yet used for deletion, this patch only ensures the list is always consistent.
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)