git.m6w6.name Git - m6w6/libmemcached/blob - docs/source/libmemcached.rst

   1 C/C++ Client Library for memcached
   2 ==================================
   3
   4 SYNOPSIS
   5 --------
   6
   7 #include <libmemcached/memcached.h>
   8   Compile and link with -lmemcached
   9
  10 =======
  11
  12 `libmemcached` is an open source C/C++ client library and tools for the
  13 memcached server (http://memcached.org/). It has been designed to be light on
  14 memory usage, thread safe, and provide full access to server side methods.
  15
  16 `libmemcached` was designed to provide the greatest number of options to use
  17 Memcached. Some of the features provided:
  18
  19 1. Asynchronous and Synchronous Transport Support.
  20 2. Consistent Hashing and Distribution.
  21 3. Tunable Hashing algorithm to match keys.
  22 4. Access to large object support.
  23 5. Local replication.
  24 6. A complete reference guide and documentation to the API.
  25 7. Tools to Manage your Memcached networks.
  26
  27 DESCRIPTION
  28 -----------
  29
  30 "Memcached is a high-performance, distributed memory object caching system,
  31 generic in nature, but intended for use in speeding up dynamic web applications
  32 by alleviating database load." `http://memcached.org/ <http://memcached.org/>`_
  33
  34 `libmemcached` is a small, thread-safe client library for the memcached
  35 protocol. The code has all been written to allow for both web and embedded
  36 usage. It handles the work behind routing individual keys to specific servers
  37 specified by the developer (and values are matched based on server order as
  38 supplied by the user). It implements a modular and consistent method of object
  39 distribution.
  40
  41 There are multiple implemented routing and hashing methods. See the
  42 `memcached_behavior_set` manpage for more information.
  43
  44 All operations are performed against a `memcached_st` structure. These
  45 structures can either be dynamically allocated or statically allocated and then
  46 initialized by `memcached_create`. Functions have been written in order to
  47 encapsulate the `memcached_st`. It is not recommended that you operate directly
  48 against the structure.
  49
  50 Nearly all functions return a `memcached_return_t` value. This value can be
  51 translated to a printable string with `memcached_strerror`.
  52
  53 Objects are stored on servers by hashing keys. The hash value maps the key to a
  54 particular server. All clients understand how this hashing works, so it is
  55 possibly to reliably both push data to a server and retrieve data from a server.
  56
  57 Group keys can be optionally used to group sets of objects with servers.
  58
  59 Namespaces are supported, and can be used to partition caches so that multiple
  60 applications can use the same memcached servers.
  61
  62 Some features of the library must be enabled through `memcached_behavior_set`.
  63
  64 THREADS AND PROCESSES
  65 ---------------------
  66
  67 No global variables are used in this library.
  68
  69 `memcached_st` structures are thread-safe, but when using threads or forked
  70 processes it is important to keep one instance of `memcached_st` per process or
  71 thread. Without creating your own locking structures you can not share a single
  72 `memcached_st`. However, you can call `memcached_quit` on a `memcached_st` and
  73 then use the resulting cloned structure.
  74
  75 SYSTEMTAP
  76 ---------
  77
  78 `libmemcached` can be built to support Systemtap on Linux when enabled at
  79 compile time.
  80
  81 Please see :manpage:`stap(1)` and :manpage:`dtrace(1)` for more information
  82 about Systemtap.
  83
  84 CLIENT PROGRAMS
  85 ---------------
  86
  87 `libmemcached` comes with a few useful client programs:
  88
  89 .. only:: man
  90
  91     :manpage:`memcached(1)`
  92     :manpage:`memaslap(1)`
  93     :manpage:`memcapable(1)`
  94     :manpage:`memcat(1)`
  95     :manpage:`memcp(1)`
  96     :manpage:`memdump(1)`
  97     :manpage:`memerror(1)`
  98     :manpage:`memexist(1)`
  99     :manpage:`memflush(1)`
 100     :manpage:`memparse(1)`
 101     :manpage:`memping(1)`
 102     :manpage:`memrm(1)`
 103     :manpage:`memslap(1)`
 104     :manpage:`memstat(1)`
 105     :manpage:`memtouch(1)`
 106
 107 .. only:: html
 108
 109     * :doc:`bin/memaslap`
 110     * :doc:`bin/memcapable`
 111     * :doc:`bin/memcat`
 112     * :doc:`bin/memcp`
 113     * :doc:`bin/memdump`
 114     * :doc:`bin/memerror`
 115     * :doc:`bin/memexist`
 116     * :doc:`bin/memflush`
 117     * :doc:`bin/memparse`
 118     * :doc:`bin/memping`
 119     * :doc:`bin/memrm`
 120     * :doc:`bin/memslap`
 121     * :doc:`bin/memstat`
 122     * :doc:`bin/memtouch`
 123
 124 UTILITY LIBRARIES
 125 -----------------
 126
 127 .. only:: man
 128
 129     :manpage:`libhashkit(3)`
 130     :manpage:`libmemcachedutil(3)`
 131
 132 .. only:: html
 133
 134     * :doc:`libhashkit`
 135     * :doc:`libmemcachedutil`
 136
 137 SEE ALSO
 138 --------
 139
 140 .. only:: man
 141
 142     :manpage:`memcached(1)`
 143
 144     :manpage:`libmemcached_configuration(3)`
 145     :manpage:`libmemcached_examples(3)`
 146
 147     :manpage:`memcached_analyze(3)`
 148     :manpage:`memcached_append(3)`
 149     :manpage:`memcached_auto(3)`
 150     :manpage:`memcached_behavior(3)`
 151     :manpage:`memcached_callback(3)`
 152     :manpage:`memcached_cas(3)`
 153     :manpage:`memcached_create(3)`
 154     :manpage:`memcached_delete(3)`
 155     :manpage:`memcached_dump(3)`
 156     :manpage:`memcached_exist(3)`
 157     :manpage:`memcached_fetch(3)`
 158     :manpage:`memcached_flush(3)`
 159     :manpage:`memcached_flush_buffers(3)`
 160     :manpage:`memcached_generate_hash_value(3)`
 161     :manpage:`memcached_get(3)`
 162     :manpage:`memcached_last_error_message(3)`
 163     :manpage:`memcached_memory_allocators(3)`
 164     :manpage:`memcached_pool(3)`
 165     :manpage:`memcached_quit(3)`
 166     :manpage:`memcached_result_st(3)`
 167     :manpage:`memcached_return_t(3)`
 168     :manpage:`memcached_sasl(3)`
 169     :manpage:`memcached_servers(3)`
 170     :manpage:`memcached_server_st(3)`
 171     :manpage:`memcached_set(3)`
 172     :manpage:`memcached_set_encoding_key(3)`
 173     :manpage:`memcached_stats(3)`
 174     :manpage:`memcached_strerror(3)`
 175     :manpage:`memcached_touch(3)`
 176     :manpage:`memcached_user_data(3)`
 177     :manpage:`memcached_verbosity(3)`
 178     :manpage:`memcached_version(3)`
 179
 180 .. only:: html
 181
 182     * :manpage:`memcached(1)`
 183
 184     * :doc:`libmemcached/configuration`
 185     * :doc:`libmemcached/examples`
 186