+=============================================
+Appending or Prepending to data on the server
+=============================================
+
+.. index:: object: memcached_st
+
+Appending or Prepending to data on the server
+
+
+--------
+SYNOPSIS
+--------
+
+
+#include <libmemcached/memcached.h>
+
+.. c:function:: memcached_return_t memcached_prepend(memcached_st *ptr, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags)
+
+.. c:function:: memcached_return_t memcached_append(memcached_st *ptr, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags)
+
+.. c:function:: memcached_return_t memcached_prepend_by_key(memcached_st *ptr, const char *group_key, size_t group_key_length, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags);
+
+.. c:function:: memcached_return_t memcached_append_by_key(memcached_st *ptr, const char *group_key, size_t group_key_length, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags);
+
+Compile and link with -lmemcached
+
+
+-----------
+DESCRIPTION
+-----------
+
+
+memcached_prepend() and memcached_append are used to
+modify information on a server. All methods take a key, and its length to
+store the object. Keys are currently limited to 250 characters when using either a version of memcached(1) which is 1.4 or below, or when using the text protocol.
+You must supply both a value and a length. Optionally you
+may test an expiration time for the object and a 16 byte value (it is
+meant to be used as a bitmap). "flags" is a 4byte space that is stored alongside of the main value. Many sub libraries make use of this field, so in most cases users should avoid making use of it.
+
+memcached_prepend() places a segment of data before the last piece of data
+stored. Currently expiration and key are not used in the server.
+
+memcached_append() places a segment of data at the end of the last piece of
+data stored. Currently expiration and key are not used in the server.
+
+memcached_prepend_by_key() and memcached_append_by_key_by_key(,
+methods both behave in a similar method as the non key
+methods. The difference is that they use their group_key parameter to map
+objects to particular servers.
+
+If you are looking for performance, memcached_set() with non-blocking IO is
+the fastest way to store data on the server.
+
+All of the above functions are testsed with the \ ``MEMCACHED_BEHAVIOR_USE_UDP``\
+behavior enabled. However, when using these operations with this behavior on, there
+are limits to the size of the payload being sent to the server. The reason for
+these limits is that the Memcached Server does not allow multi-datagram requests
+and the current server implementation sets a datagram size to 1400 bytes. Due
+to protocol overhead, the actual limit of the user supplied data is less than
+1400 bytes and depends on the protocol in use as, well as the operation being
+executed. When running with the binary protocol, \ `` MEMCACHED_BEHAVIOR_BINARY_PROTOCOL``\ ,
+the size of the key,value, flags and expiry combined may not exceed 1368 bytes.
+When running with the ASCII protocol, the exact limit fluctuates depending on
+which function is being executed and whether the function is a cas operation
+or not. For non-cas ASCII set operations, there are at least 1335 bytes available
+to split among the key, key_prefix, and value; for cas ASCII operations there are
+at least 1318 bytes available to split among the key, key_prefix and value. If the
+total size of the command, including overhead, exceeds 1400 bytes, a \ ``MEMCACHED_WRITE_FAILURE``\
+will be returned.
+
+
+------
+RETURN
+------
+
+
+All methods return a value of type \ ``memcached_return_t``\ .
+On success the value will be \ ``MEMCACHED_SUCCESS``\ .
+Use memcached_strerror() to translate this value to a printable string.
+
+
+----
+HOME
+----
+
+
+To find out more information please check:
+`http://libmemcached.org/ <http://libmemcached.org/>`_
+
+
+--------
+SEE ALSO
+--------
+
+
+memcached(1) libmemached(3) memcached_strerror(3) memcached_set(3) memcached_add(3) memcached_cas(3) memcached_replace(3)
+