=head1 NAME

memcached_set, memcached_add, memcached_replace

=head1 LIBRARY

C Client Library for memcached (libmemcached, -lmemcached)

=head1 SYNOPSIS

#include <memcached.h>
memcached_return memcached_set(memcached_st *ptr, char *key, size_t key_length, 
    char *value, size_t value_length, 
    time_t expiration,
    uint16_t  flags);
memcached_return memcached_add(memcached_st *ptr, char *key, size_t key_length,
    char *value, size_t value_length, 
    time_t expiration,
    uint16_t  flags);
memcached_return memcached_replace(memcached_st *ptr, char *key, size_t key_length,
    char *value, size_t value_length, 
    time_t expiration,
    uint16_t  flags);

=head1 DESCRIPTION

memcached_set() , memcached_add(), and memcached_replace() are all used to
store information on the server. All methods take a key, and its length to
store the object. Keys are currently limited to 250 charcterss by the
memcached server. You must also supply a value and a length. Optionally you
may support an expiration time for the object and a 16 byte value (it is
meant to be used as a bitmap).

memcached_set() will write an object to the server. If an object already
exists it will overwrite what is in the server. If the object does not exist
it will be written. If you are using the non-blocking mode this function
will always return true unless a network error occurs. 

memcached_replace() replaces an object on the server. If the object is not
found on the server an error occurs.

memcached_add() adds an object to the server. If the object is found on the
server an error occurs, otherwise the value is stored.

memcached_set() with non-blocking IO is the fastest way to store data on the
server.

=head1 RETURN

All methods return a memcached_return value. On success the value will be
MEMCACHED_SUCCESS (see memcached_strerror() for more information on this).
For memcached_replace() and memcached_add() MEMCACHED_NOTSTORED is a
legitmate error in the case of a collision.

=head1 HOME

To find out more information please check: http://tangent.org/552/libmemcached.html

=head1 AUTHOR

Brian Aker, brian@tangent.org

=head1 SEE ALSO

memcached(1) libmemached(3) memcached_strerror(3)

=cut