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BUGS.md
# Bugs, Known Issues and Insufficiencies ## libhashkit libhashkit is not usable for general purpose hashing, because it is geared to usage by libmemcached. ### MurMur Hashkit's MurMur/MurMur3 are limited to the lower 32 bits. ### crc32 Commit "[More Hashing methods](https://github.com/awesomized/libmemcached/commits/1207354f)" from October 2007 first released in v0.8, which main intention seems to have been to add FNV1 hash algos, changed the result of the crc32 hash to only its upper 16 bits sans MSB, without any additional comment. The implementations referred to in the file header (Postgres and BSD) do not exhibit this behavior. A [bug report](https://bugs.launchpad.net/libmemcached/+bug/604178) was filed three years later on launchpad, which was marked `Won't fix` with the comment that it was for compatibility with other "drivers", which supposedly refers to other memcached client libraries. ## libmemcached ### Replication This is a somewhat badly named feature, because it **does not** provide any of the guaranties one would expect from a proper replication. One can set the intended number of additional servers where data should be stored with the behavior `MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS` and specify whether `MGET`s/`GET`s should read from a random server with `MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ`. `DELETE`s will try to delete the key from all replicas. The binary protocol is required and any other command is unaffected. ### TLS/SSL libmemcached does not support TLS/SSL, yet. See [github issue #37](https://github.com/awesomized/libmemcached/issues/37). ### Coroutines and event loops libmemcached does not support explicit asynchronous usage, yet. See [github issue #54](https://github.com/awesomized/libmemcached/issues/54). ### META protocol libmemcached deos not support memcached's META protocol, yet. See [github issue #121](https://github.com/awesomized/libmemcached/issues/121).