libmemcached.pop(3) libmemcached.pop(3)
libmemcached libmemcached
2010-06-28
NAME
libmemcached - Client library for memcached
LIBRARY
C Client Library for memcached (libmemcached, -lmemcached)
SYNOPSIS
#include <memcached.h>
DESCRIPTION
"Memcached is a high-performance, distributed memory object caching
system, generic in nature, but intended for use in speeding up dynamic
web applications by alleviating database load."
<http://danga.com/memcached/>
libmemcached is a small, thread-safe client library for the memcached
protocol. The code has all been written with an eye to allow for both
web and embedded usage. It handles the work behind routing particular
keys to specific servers that you specify (and values are matched
based on server order as supplied by you). It implements both a modula
and consistent method of object distribution.
There are multiple implemented routing and hashing methods. See the
memcached_behavior_set() manpage.
All operations are performed against a "memcached_st" structure.
These structures can either be dynamically allocated or statically
allocated and then initialized by memcached_create(). Functions have
been written in order to encapsulate the "memcached_st". It is not
recommended that you operate directly against the structure.
Nearly all functions return a "memcached_return_t" value. This value
can be translated to a printable string with memcached_strerror(3).
Partitioning based on keys is supported in the library. Using the key
partioning functions it is possible to group sets of object onto
servers.
"memcached_st" structures are thread-safe, but each thread must
contain its own structure (that is, if you want to share these among
threads you must provide your own locking). No global variables are
used in this library.
If you are working with GNU autotools you will want to add the
following to your configure.ac to properly include libmemcached in
your application.
PKG_CHECK_MODULES(DEPS, libmemcached >= 0.8.0) AC_SUBST(DEPS_CFLAGS)
AC_SUBST(DEPS_LIBS)
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Some features of the library must be enabled through
memcached_behavior_set().
Hope you enjoy it!
CONSTANTS
A number of constants have been provided for in the library.
MEMCACHED_DEFAULT_PORT
The default port used by memcached(3).
MEMCACHED_MAX_KEY
Default maximum size of a key (which includes the null pointer).
Master keys have no limit, this only applies to keys used for
storage.
MEMCACHED_MAX_KEY
Default size of key (which includes the null pointer).
MEMCACHED_STRIDE
This is the "stride" used in the consistent hash used between
replicas.
MEMCACHED_MAX_HOST_LENGTH
Maximum allowed size of the hostname.
MEMCACHED_VERSION_STRING
String value of libmemcached version such as "1.23.4"
MEMCACHED_MAJOR_VERSION
Major version value. Such as 1.23.4, would be 1
MEMCACHED_MINOR_VERSION
Major version value. Such as 1.23.4, would be 23
MEMCACHED_MICRO_VERSION
Major version value. Such as 1.23.4, would be 4
THREADS AND PROCESSES
When using threads or forked processes it is important to keep an
instance of "memcached_st" per process or thread. Without creating
your own locking structures you can not share a single "memcached_st".
You can though call memcached_quit(3) on a "memcached_st" and then use
the resulting cloned structure.
HOME
To find out more information please check:
<https://launchpad.net/libmemcached>
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AUTHOR
Brian Aker, <brian@tangent.org>
SEE ALSO
memcached(1) libmemcached_examples(3) libmemcached(1) memcat(1)
memcp(1) memflush(1) memrm(1) memslap(1) memstat(1) memcached_fetch(3)
memcached_replace(3) memcached_server_list_free(3)
libmemcached_examples(3) memcached_clone(3) memcached_free(3)
memcached_server_add(3) memcached_server_push(3) memcached_add(3)
memcached_get(3) memcached_server_count(3) memcached_servers_parse(3)
memcached_create(3) memcached_increment(3) memcached_server_list(3)
memcached_set(3) memcached_decrement(3) memcached_mget(3)
memcached_server_list_append(3) memcached_strerror(3)
memcached_delete(3) memcached_quit(3) memcached_server_list_count(3)
memcached_verbosity(3) memcached_server_add_unix_socket(3)
memcached_result_create(3) memcached_result_free(3)
memcached_result_key_value(3) memcached_result_key_length(3)
memcached_result_value(3) memcached_result_length(3)
memcached_result_flags(3) memcached_result_cas(3)
memcached_result_st(3) memcached_append(3) memcached_prepend(3)
memcached_fetch_result(3) memerror(1) memcached_get_by_key(3)
memcached_mget_by_key(3) memcached_delete_by_key(3)
memcached_fetch_execute(3) memcached_callback_get(3)
memcached_callback_set(3) memcached_version(3)
memcached_lib_version(3) memcached_result_set_value(3)
memcached_dump(3) memdump(1) memcached_set_memory_allocators(3)
memcached_get_memory_allocators(3) memcached_get_user_data(3)
memcached_set_user_data(3)
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