git.m6w6.name Git - awesomized/libmemcached/blob - BUGS.md

   1 # Bugs, Known Issues and Insufficiencies
   2
   3 ## libhashkit
   4
   5 ### MurMur
   6
   7 Hashkit's MurMur/MurMur3 are limited to the lower 32 bits.
   8
   9 ### crc32
  10
  11 Commit "[More Hashing methods](./commits/1207354f)" from October 2007
  12 first released in v0.8, which main intention seems to have been to add
  13 FNV1 hash algos, changed the result of the crc32 hash to only its upper
  14 16 bits sans MSB, without any additional comment.
  15
  16 The implementations referred to in the file header (Postgres and BSD)
  17 do not exhibit this behavior.
  18
  19 A [bug report](https://bugs.launchpad.net/libmemcached/+bug/604178) was
  20 filed three years later on launchpad, which was marked `Won't fix` with
  21 the comment that it was for compatibility with other "drivers", which
  22 supposedly refers to other memcached client libraries.
  23
  24
  25 ## libmemcached
  26
  27 ### Replication
  28
  29 This is a somewhat badly named feature, because it **does not** provide
  30 any of the guaranties one would expect from a proper replication.
  31
  32 One can set the intended number of additional servers where data should
  33 be stored with the behavior `MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS` and
  34 specify whether `MGET`s/`GET`s should read from a random server with
  35 `MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ`. `DELETE`s will try to
  36 delete the key from all replicas.
  37
  38 The binary protocol is required and any other command is unaffected.