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#include <libmemcached/memcached.h>
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.B memcached_return_t memcached_set (memcached_st *ptr, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags);
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.B memcached_return_t memcached_add (memcached_st *ptr, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags);
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.B memcached_return_t memcached_replace (memcached_st *ptr, const char *key, size_t key_length, const char *value, size_t value_length, time_t expiration, uint32_t flags);
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.B memcached_return_t memcached_set_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);
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.B memcached_return_t memcached_add_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);
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.B memcached_return_t memcached_replace_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);
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.B memcached_return_t memcached_set(memcached_st\fI\ *ptr\fP, const char\fI\ *key\fP, size_t\fI\ key_length\fP, const char\fI\ *value\fP, size_t\fI\ value_length\fP, time_t\fI\ expiration\fP, uint32_t\fI\ flags\fP)
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.B memcached_return_t memcached_add(memcached_st\fI\ *ptr\fP, const char\fI\ *key\fP, size_t\fI\ key_length\fP, const char\fI\ *value\fP, size_t\fI\ value_length\fP, time_t\fI\ expiration\fP, uint32_t\fI\ flags\fP)
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.B memcached_return_t memcached_replace(memcached_st\fI\ *ptr\fP, const char\fI\ *key\fP, size_t\fI\ key_length\fP, const char\fI\ *value\fP, size_t\fI\ value_length\fP, time_t\fI\ expiration\fP, uint32_t\fI\ flags\fP)
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.B memcached_return_t memcached_set_by_key(memcached_st\fI\ *ptr\fP, const char\fI\ *group_key\fP, size_t\fI\ group_key_length\fP, const char\fI\ *key\fP, size_t\fI\ key_length\fP, const char\fI\ *value\fP, size_t\fI\ value_length\fP, time_t\fI\ expiration\fP, uint32_t\fI\ flags\fP)
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.B memcached_return_t memcached_add_by_key(memcached_st\fI\ *ptr\fP, const char\fI\ *group_key\fP, size_t\fI\ group_key_length\fP, const char\fI\ *key\fP, size_t\fI\ key_length\fP, const char\fI\ *value\fP, size_t\fI\ value_length\fP, time_t\fI\ expiration\fP, uint32_t\fI\ flags\fP)
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.B memcached_return_t memcached_replace_by_key(memcached_st\fI\ *ptr\fP, const char\fI\ *group_key\fP, size_t\fI\ group_key_length\fP, const char\fI\ *key\fP, size_t\fI\ key_length\fP, const char\fI\ *value\fP, size_t\fI\ value_length\fP, time_t\fI\ expiration\fP, uint32_t\fI\ flags\fP)
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Compile and link with \-lmemcached
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\fBmemcached_set()\fP, \fBmemcached_add()\fP, and \fBmemcached_replace()\fP 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 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
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\fI\%memcached_set()\fP, \fI\%memcached_add()\fP, and \fI\%memcached_replace()\fP 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 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
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store the object. Keys are currently limited to 250 characters by the
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memcached(1) server. You must supply both a value and a length. Optionally you
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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.
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\fBmemcached_set()\fP will write an object to the server. If an object
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\fI\%memcached_set()\fP will write an object to the server. If an object
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already exists it will overwrite what is in the server. If the object does not
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exist it will be written. If you are using the non\-blocking mode this function
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will always return true unless a network error occurs.
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\fBmemcached_replace()\fP replaces an object on the server. If the object is not found on the server an error occurs.
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\fI\%memcached_replace()\fP replaces an object on the server. If the object is not found on the server an error occurs.
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\fBmemcached_add()\fP adds an object to the server. If the object is found on the server an error occurs, otherwise the value is stored.
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\fI\%memcached_add()\fP adds an object to the server. If the object is found on the server an error occurs, otherwise the value is stored.
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\fBmemcached_cas()\fP overwrites data in the server as long as the "cas"
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value is still the same in the server. You can get the cas value of a result by
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calling \fBmemcached_result_cas()\fP on a memcached_result_st(3) structure. At the point
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that this note was written cas is still buggy in memached. Turning on tests
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for it in libmemcached(3) is optional. Please see memcached_set() for
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for it in libmemcached(3) is optional. Please see memcached_set for
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information on how to do this.
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\fBmemcached_set_by_key()\fP, \fBmemcached_add_by_key()\fP, and \fBmemcached_replace_by_key()\fP methods all behave in a similar method as the non
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\fI\%memcached_set_by_key()\fP, \fI\%memcached_add_by_key()\fP, and \fI\%memcached_replace_by_key()\fP methods all behave in a similar method as the non
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key methods. The difference is that they use their group_key parameter to map
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objects to particular servers.
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If you are looking for performance, \fBmemcached_set()\fP with non\-blocking IO is the fastest way to store data on the server.
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If you are looking for performance, \fI\%memcached_set()\fP with non\-blocking IO is the fastest way to store data on the server.
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All of the above functions are testsed with the \fBMEMCACHED_BEHAVIOR_USE_UDP\fP behavior enabled. However, when using these operations with this behavior
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on, there are limits to the size of the payload being sent to the server.
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docs/man/memcached_add_by_key.3
