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11 <title>Appending or Prepending to data on the server
— libmemcached
1.0.99 documentation
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54 <a href=
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88 <p class=
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"caption-text">Basics
</span></p>
90 <li class=
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"reference internal" href=
"libmemcached.html">Introducing the C Client Library for memcached
</a><ul>
91 <li class=
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"libmemcached.html#synopsis">SYNOPSIS
</a></li>
92 <li class=
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</a></li>
93 <li class=
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</a></li>
94 <li class=
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"libmemcached.html#threads-and-processes">THREADS AND PROCESSES
</a></li>
95 <li class=
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"libmemcached.html#see-also">SEE ALSO
</a></li>
98 <li class=
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"reference internal" href=
"versioning.html">Versioning
</a></li>
99 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_create.html">Creating and destroying a memcached_st
</a><ul>
100 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_create.html#synopsis">SYNOPSIS
</a></li>
101 <li class=
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"reference internal" href=
"memcached_create.html#description">DESCRIPTION
</a></li>
102 <li class=
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"memcached_create.html#return">RETURN
</a></li>
103 <li class=
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"reference internal" href=
"memcached_create.html#see-also">SEE ALSO
</a></li>
106 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached_examples.html">Examples
</a><ul>
107 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_examples.html#description">DESCRIPTION
</a></li>
108 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_examples.html#connecting-to-servers">Connecting to servers
</a></li>
109 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_examples.html#creating-a-pool-of-servers">Creating a pool of servers
</a></li>
110 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_examples.html#adding-a-value-to-the-server">Adding a value to the server
</a></li>
111 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_examples.html#fetching-multiple-values">Fetching multiple values
</a></li>
112 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_examples.html#see-also">SEE ALSO
</a></li>
115 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached_configuration.html">Configuring Libmemcached
</a><ul>
116 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_configuration.html#synopsis">SYNOPSIS
</a></li>
117 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_configuration.html#description">DESCRIPTION
</a></li>
118 <li class=
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"reference internal" href=
"libmemcached_configuration.html#environment">ENVIRONMENT
</a></li>
119 <li class=
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"reference internal" href=
"libmemcached_configuration.html#return">RETURN
</a></li>
120 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_configuration.html#example">EXAMPLE
</a></li>
121 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached_configuration.html#see-also">SEE ALSO
</a></li>
124 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached/memcached_last_error_message.html">Retrieving errors
</a><ul>
125 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_last_error_message.html#synopsis">SYNOPSIS
</a></li>
126 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_last_error_message.html#description">DESCRIPTION
</a></li>
127 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_last_error_message.html#return">RETURN
</a></li>
128 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_last_error_message.html#see-also">SEE ALSO
</a></li>
132 <p class=
"caption"><span class=
"caption-text">Working with Data
</span></p>
134 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_auto.html">Incrementing and Decrementing Values
</a><ul>
135 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_auto.html#synopsis">SYNOPSIS
</a></li>
136 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_auto.html#description">DESCRIPTION
</a></li>
137 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_auto.html#return">RETURN
</a></li>
138 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_auto.html#see-also">SEE ALSO
</a></li>
141 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_delete.html">Deleting data from a server
</a><ul>
142 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_delete.html#synopsis">SYNOPSIS
</a></li>
143 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_delete.html#description">DESCRIPTION
</a></li>
144 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_delete.html#return">RETURN
</a></li>
145 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_delete.html#see-also">SEE ALSO
</a></li>
148 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached/memcached_exist.html">Determine if a keys exists.
</a><ul>
149 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_exist.html#synopsis">SYNOPSIS
</a></li>
150 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_exist.html#description">DESCRIPTION
</a></li>
151 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_exist.html#return">RETURN
</a></li>
152 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_exist.html#see-also">SEE ALSO
</a></li>
155 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_flush_buffers.html">Flushing client buffers
</a><ul>
156 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush_buffers.html#synopsis">SYNOPSIS
</a></li>
157 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush_buffers.html#description">DESCRIPTION
</a></li>
158 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush_buffers.html#return">RETURN
</a></li>
159 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush_buffers.html#see-also">SEE ALSO
</a></li>
162 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_flush.html">Wiping clean the contents of a server
</a><ul>
163 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush.html#synopsis">SYNOPSIS
</a></li>
164 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush.html#description">DESCRIPTION
</a></li>
165 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush.html#return">RETURN
</a></li>
166 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_flush.html#see-also">SEE ALSO
</a></li>
169 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_get.html">Retrieving data from the server
</a><ul>
170 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_get.html#synopsis">SYNOPSIS
</a></li>
171 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_get.html#description">DESCRIPTION
</a></li>
172 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_get.html#return">RETURN
</a></li>
173 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_get.html#see-also">SEE ALSO
</a></li>
176 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_result_st.html">Working with result sets
</a><ul>
177 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_result_st.html#synopsis">SYNOPSIS
</a></li>
178 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_result_st.html#description">DESCRIPTION
</a></li>
179 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_result_st.html#return">RETURN
</a></li>
180 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_result_st.html#see-also">SEE ALSO
</a></li>
183 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_set.html">Store, replace, add, or atomically add data to the server
</a><ul>
184 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_set.html#synopsis">SYNOPSIS
</a></li>
185 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_set.html#description">DESCRIPTION
</a></li>
186 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_set.html#return">RETURN
</a></li>
187 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_set.html#see-also">SEE ALSO
</a></li>
190 <li class=
"toctree-l1 current"><a class=
"current reference internal" href=
"#">Appending or Prepending to data on the server
</a><ul>
191 <li class=
"toctree-l2"><a class=
"reference internal" href=
"#synopsis">SYNOPSIS
</a></li>
192 <li class=
"toctree-l2"><a class=
"reference internal" href=
"#description">DESCRIPTION
</a></li>
193 <li class=
"toctree-l2"><a class=
"reference internal" href=
"#return">RETURN
</a></li>
194 <li class=
"toctree-l2"><a class=
"reference internal" href=
"#see-also">SEE ALSO
</a></li>
197 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_cas.html">Working with data on the server in an atomic fashion
</a><ul>
198 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_cas.html#synopsis">SYNOPSIS
</a></li>
199 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_cas.html#description">DESCRIPTION
</a></li>
200 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_cas.html#return">RETURN
</a></li>
201 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_cas.html#see-also">SEE ALSO
</a></li>
205 <p class=
"caption"><span class=
"caption-text">Advanced Topics
</span></p>
207 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached-1.0/memcached_set_encoding_key.html">Set encryption key
</a><ul>
208 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached-1.0/memcached_set_encoding_key.html#synopsis">SYNOPSIS
</a></li>
209 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached-1.0/memcached_set_encoding_key.html#description">DESCRIPTION
</a></li>
210 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached-1.0/memcached_set_encoding_key.html#return">RETURN
</a></li>
211 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached-1.0/memcached_set_encoding_key.html#see-also">SEE ALSO
</a></li>
214 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_behavior.html">Modifying how the driver behaves
</a><ul>
215 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_behavior.html#synopsis">SYNOPSIS
</a></li>
216 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_behavior.html#description">DESCRIPTION
</a></li>
217 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_behavior.html#return">RETURN
</a></li>
218 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_behavior.html#notes">NOTES
</a></li>
219 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_behavior.html#see-also">SEE ALSO
</a></li>
222 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_callback.html">Setting callbacks
</a><ul>
223 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_callback.html#synopsis">SYNOPSIS
</a></li>
224 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_callback.html#description">DESCRIPTION
</a></li>
225 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_callback.html#return">RETURN
</a></li>
226 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_callback.html#see-also">SEE ALSO
</a></li>
229 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_dump.html">Dumping data from a server
</a><ul>
230 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_dump.html#synopsis">SYNOPSIS
</a></li>
231 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_dump.html#description">DESCRIPTION
</a></li>
232 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_dump.html#return">RETURN
</a></li>
233 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_dump.html#see-also">SEE ALSO
</a></li>
236 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_generate_hash_value.html">Generating hash values directly
</a><ul>
237 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_generate_hash_value.html#synopsis">SYNOPSIS
</a></li>
238 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_generate_hash_value.html#description">DESCRIPTION
</a></li>
239 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_generate_hash_value.html#return">RETURN
</a></li>
240 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_generate_hash_value.html#see-also">SEE ALSO
</a></li>
243 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_memory_allocators.html">Use custom allocators for embedded usage
</a><ul>
244 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_memory_allocators.html#synopsis">SYNOPSIS
</a></li>
245 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_memory_allocators.html#description">DESCRIPTION
</a></li>
246 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_memory_allocators.html#notes">NOTES
</a></li>
247 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_memory_allocators.html#return">RETURN
</a></li>
248 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_memory_allocators.html#see-also">SEE ALSO
</a></li>
251 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_quit.html">Disconnecting a client from a server
</a><ul>
252 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_quit.html#synopsis">SYNOPSIS
</a></li>
253 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_quit.html#description">DESCRIPTION
</a></li>
254 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_quit.html#return">RETURN
</a></li>
255 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_quit.html#see-also">SEE ALSO
</a></li>
258 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached/memcached_return_t.html">Error Codes (memcached_return_t)
</a><ul>
259 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#synopsis">SYNOPSIS
</a></li>
260 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#see-also">SEE ALSO
</a></li>
263 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_sasl.html">SASL support
</a><ul>
264 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_sasl.html#synopsis">SYNOPSIS
</a></li>
265 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_sasl.html#description">DESCRIPTION
</a></li>
266 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_sasl.html#return">RETURN
</a></li>
267 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_sasl.html#see-also">SEE ALSO
</a></li>
270 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_server_st.html">Managing lists of servers
</a><ul>
271 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_server_st.html#synopsis">SYNOPSIS
</a></li>
272 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_server_st.html#description">DESCRIPTION
</a></li>
273 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_server_st.html#return">RETURN
</a></li>
274 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_server_st.html#see-also">SEE ALSO
</a></li>
277 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_servers.html">Manipulate the server information stored in memcached_st
</a><ul>
278 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_servers.html#synopsis">SYNOPSIS
</a></li>
279 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_servers.html#description">DESCRIPTION
</a></li>
280 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_servers.html#return">RETURN
</a></li>
281 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_servers.html#see-also">SEE ALSO
</a></li>
284 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_strerror.html">Converting Errors, memcached_return_t, to strings
</a><ul>
285 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_strerror.html#synopsis">SYNOPSIS
</a></li>
286 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_strerror.html#description">DESCRIPTION
</a></li>
287 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_strerror.html#return">RETURN
</a></li>
288 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_strerror.html#see-also">SEE ALSO
</a></li>
291 <li class=
"toctree-l1"><a class=
"reference internal" href=
"error_messages.html">Client Error messages
</a><ul>
292 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_AUTH_CONTINUE.html">MEMCACHED_AUTH_CONTINUE
</a></li>
293 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_AUTH_FAILURE.html">MEMCACHED_AUTH_FAILURE
</a></li>
294 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_AUTH_PROBLEM.html">MEMCACHED_AUTH_PROBLEM
</a></li>
295 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_BAD_KEY_PROVIDED.html">MEMCACHED_BAD_KEY_PROVIDED
</a></li>
296 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_BUFFERED.html">MEMCACHED_BUFFERED
</a></li>
297 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_CLIENT_ERROR.html">MEMCACHED_CLIENT_ERROR
</a></li>
298 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_CONNECTION_BIND_FAILURE.html">MEMCACHED_CONNECTION_BIND_FAILURE
</a></li>
299 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_CONNECTION_FAILURE.html">MEMCACHED_CONNECTION_FAILURE
</a></li>
300 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE.html">MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE
</a></li>
301 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_DATA_DOES_NOT_EXIST.html">MEMCACHED_DATA_DOES_NOT_EXIST
</a></li>
302 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_DATA_EXISTS.html">MEMCACHED_DATA_EXISTS
</a></li>
303 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_DELETED.html">MEMCACHED_DELETED
</a></li>
304 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_DEPRECATED.html">MEMCACHED_DEPRECATED
</a></li>
305 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_E2BIG.html">MEMCACHED_E2BIG
</a></li>
306 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_END.html">MEMCACHED_END
</a></li>
307 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_ERRNO.html">MEMCACHED_ERRNO
</a></li>
308 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_FAILURE.html">MEMCACHED_FAILURE
</a></li>
309 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_FAIL_UNIX_SOCKET.html">MEMCACHED_FAIL_UNIX_SOCKET
</a></li>
310 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_FETCH_NOTFINISHED.html">MEMCACHED_FETCH_NOTFINISHED
</a></li>
311 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_HOST_LOOKUP_FAILURE.html">MEMCACHED_HOST_LOOKUP_FAILURE
</a></li>
312 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_INVALID_ARGUMENTS.html">MEMCACHED_INVALID_ARGUMENTS
</a></li>
313 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_INVALID_HOST_PROTOCOL.html">MEMCACHED_INVALID_HOST_PROTOCOL
</a></li>
314 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_ITEM.html">MEMCACHED_ITEM
</a></li>
315 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_KEY_TOO_BIG.html">MEMCACHED_KEY_TOO_BIG
</a></li>
316 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_MAXIMUM_RETURN.html">MEMCACHED_MAXIMUM_RETURN
</a></li>
317 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_MEMORY_ALLOCATION_FAILURE.html">MEMCACHED_MEMORY_ALLOCATION_FAILURE
</a></li>
318 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_NOTFOUND.html">MEMCACHED_NOTFOUND
</a></li>
319 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_NOTSTORED.html">MEMCACHED_NOTSTORED
</a></li>
320 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_NOT_SUPPORTED.html">MEMCACHED_NOT_SUPPORTED
</a></li>
321 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_NO_KEY_PROVIDED.html">MEMCACHED_NO_KEY_PROVIDED
</a></li>
322 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_NO_SERVERS.html">MEMCACHED_NO_SERVERS
</a></li>
323 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_PARSE_ERROR.html">MEMCACHED_PARSE_ERROR
</a></li>
324 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_PARSE_USER_ERROR.html">MEMCACHED_PARSE_USER_ERROR
</a></li>
325 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_PARTIAL_READ.html">MEMCACHED_PARTIAL_READ
</a></li>
326 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_PROTOCOL_ERROR.html">MEMCACHED_PROTOCOL_ERROR
</a></li>
327 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_READ_FAILURE.html">MEMCACHED_READ_FAILURE
</a></li>
328 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_SERVER_ERROR.html">MEMCACHED_SERVER_ERROR
</a></li>
329 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_SERVER_MARKED_DEAD.html">MEMCACHED_SERVER_MARKED_DEAD
</a></li>
330 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_SOME_ERRORS.html">MEMCACHED_SOME_ERRORS
</a></li>
331 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_STAT.html">MEMCACHED_STAT
</a></li>
332 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_STORED.html">MEMCACHED_STORED
</a></li>
333 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_SUCCESS.html">MEMCACHED_SUCCESS
</a></li>
334 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_TIMEOUT.html">MEMCACHED_TIMEOUT
</a></li>
335 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_UNKNOWN_READ_FAILURE.html">MEMCACHED_UNKNOWN_READ_FAILURE
</a></li>
336 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_UNKNOWN_STAT_KEY.html">MEMCACHED_UNKNOWN_STAT_KEY
</a></li>
337 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_VALUE.html">MEMCACHED_VALUE
</a></li>
338 <li class=
"toctree-l2"><a class=
"reference internal" href=
"client_errors/MEMCACHED_WRITE_FAILURE.html">MEMCACHED_WRITE_FAILURE
</a></li>
341 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_user_data.html">Storing custom user information in the client.
</a><ul>
342 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_user_data.html#library">LIBRARY
</a></li>
343 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_user_data.html#synopsis">SYNOPSIS
</a></li>
344 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_user_data.html#description">DESCRIPTION
</a></li>
345 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_user_data.html#return">RETURN
</a></li>
346 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_user_data.html#see-also">SEE ALSO
</a></li>
349 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_verbosity.html">Setting the verbosity of a server
</a><ul>
350 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_verbosity.html#synopsis">SYNOPSIS
</a></li>
351 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_verbosity.html#description">DESCRIPTION
</a></li>
352 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_verbosity.html#return">RETURN
</a></li>
353 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_verbosity.html#see-also">SEE ALSO
</a></li>
356 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_version.html">Getting version information about the client and server
</a><ul>
357 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_version.html#synopsis">SYNOPSIS
</a></li>
358 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_version.html#description">DESCRIPTION
</a></li>
359 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_version.html#return">RETURN
</a></li>
360 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_version.html#see-also">SEE ALSO
</a></li>
363 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached/defaults.html">DEFAULTS
</a></li>
365 <p class=
"caption"><span class=
"caption-text">Interface Versions
</span></p>
367 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached-1.0/index.html">libmemcached
1.0 API
</a><ul>
368 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcached-1.0/memcached_touch.html">memcached_touch, memcached_touch_by_key
</a></li>
371 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached-1.1/index.html">libmemcached
1.1 API
</a></li>
373 <p class=
"caption"><span class=
"caption-text">Deprecated Functions
</span></p>
375 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcached/memcached_fetch.html">memcached_fetch
</a></li>
377 <p class=
"caption"><span class=
"caption-text">Platform Specifics
</span></p>
379 <li class=
"toctree-l1"><a class=
"reference internal" href=
"tap.html">Systemtap support
</a></li>
380 <li class=
"toctree-l1"><a class=
"reference internal" href=
"types.html">Required C types
</a><ul>
381 <li class=
"toctree-l2"><a class=
"reference internal" href=
"types.html#types">Types
</a></li>
382 <li class=
"toctree-l2"><a class=
"reference internal" href=
"types.html#c-types-used">C Types Used
</a></li>
386 <p class=
"caption"><span class=
"caption-text">Deriving Statistics from a Server
</span></p>
388 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_analyze.html">Analyzing servers
</a><ul>
389 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_analyze.html#synopsis">SYNOPSIS
</a></li>
390 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_analyze.html#description">DESCRIPTION
</a></li>
391 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_analyze.html#return">RETURN
</a></li>
392 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_analyze.html#see-also">SEE ALSO
</a></li>
395 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_stats.html">Working with statistical information from a server
</a><ul>
396 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_stats.html#synopsis">SYNOPSIS
</a></li>
397 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_stats.html#description">DESCRIPTION
</a></li>
398 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_stats.html#return">RETURN
</a></li>
399 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_stats.html#see-also">SEE ALSO
</a></li>
403 <p class=
"caption"><span class=
"caption-text">Libmemcachedutil
</span></p>
405 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libmemcachedutil.html">Introducing libmemcachedutil
</a><ul>
406 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcachedutil.html#synopsis">SYNOPSIS
</a></li>
407 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcachedutil.html#description">DESCRIPTION
</a></li>
408 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcachedutil.html#threads">THREADS
</a></li>
409 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libmemcachedutil.html#see-also">SEE ALSO
</a></li>
412 <li class=
"toctree-l1"><a class=
"reference internal" href=
"memcached_pool.html">Working with memcached pools
</a><ul>
413 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_pool.html#synopsis">SYNOPSIS
</a></li>
414 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_pool.html#description">DESCRIPTION
</a></li>
415 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_pool.html#return">RETURN
</a></li>
416 <li class=
"toctree-l2"><a class=
"reference internal" href=
"memcached_pool.html#see-also">SEE ALSO
</a></li>
420 <p class=
"caption"><span class=
"caption-text">Client Applications
</span></p>
422 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memcapable.html">memcapable - Checking a Memcached server capabilities and compatibility
</a><ul>
423 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcapable.html#synopsis">SYNOPSIS
</a></li>
424 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcapable.html#description">DESCRIPTION
</a></li>
425 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcapable.html#limitations">LIMITATIONS
</a></li>
426 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcapable.html#options">OPTIONS
</a></li>
427 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcapable.html#see-also">SEE ALSO
</a></li>
430 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memcat.html">memcat - “cat” data from a server
</a><ul>
431 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcat.html#synopsis">SYNOPSIS
</a></li>
432 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcat.html#description">DESCRIPTION
</a></li>
433 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcat.html#options">OPTIONS
</a></li>
434 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcat.html#see-also">SEE ALSO
</a></li>
437 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memcp.html">memcp - Copy data to a server
</a><ul>
438 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcp.html#synopsis">SYNOPSIS
</a></li>
439 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcp.html#description">DESCRIPTION
</a></li>
440 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcp.html#options">OPTIONS
</a></li>
441 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memcp.html#see-also">SEE ALSO
</a></li>
444 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memdump.html">memdump - Dumping your server
</a><ul>
445 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memdump.html#synopsis">SYNOPSIS
</a></li>
446 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memdump.html#description">DESCRIPTION
</a></li>
447 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memdump.html#options">OPTIONS
</a></li>
448 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memdump.html#see-also">SEE ALSO
</a></li>
451 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memerror.html">memerror - translate an error code to a string
</a><ul>
452 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memerror.html#synopsis">SYNOPSIS
</a></li>
453 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memerror.html#description">DESCRIPTION
</a></li>
454 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memerror.html#options">OPTIONS
</a></li>
455 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memerror.html#see-also">SEE ALSO
</a></li>
458 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memflush.html">memflush - flush all data from a server
</a><ul>
459 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memflush.html#synopsis">SYNOPSIS
</a></li>
460 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memflush.html#description">DESCRIPTION
</a></li>
461 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memflush.html#options">OPTIONS
</a></li>
462 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memflush.html#see-also">SEE ALSO
</a></li>
465 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memrm.html">memrm - Remove data from a server
</a><ul>
466 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memrm.html#synopsis">SYNOPSIS
</a></li>
467 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memrm.html#description">DESCRIPTION
</a></li>
468 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memrm.html#options">OPTIONS
</a></li>
469 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memrm.html#see-also">SEE ALSO
</a></li>
472 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memslap.html">memslap - Load testing and benchmarking a server
</a><ul>
473 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memslap.html#synopsis">SYNOPSIS
</a></li>
474 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memslap.html#description">DESCRIPTION
</a></li>
475 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memslap.html#options">OPTIONS
</a></li>
476 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memslap.html#see-also">SEE ALSO
</a></li>
479 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memaslap.html">memaslap - Load testing and benchmarking a server
</a><ul>
480 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#synopsis">SYNOPSIS
</a></li>
481 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#description">DESCRIPTION
</a></li>
482 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#features">FEATURES
</a></li>
483 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#details">DETAILS
</a></li>
484 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#usage">USAGE
</a></li>
485 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#configuration-file">Configuration file
</a></li>
486 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#format-of-output">Format of output
</a></li>
487 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#options">OPTIONS
</a></li>
488 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#examples">EXAMPLES
</a></li>
489 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memaslap.html#see-also">SEE ALSO
</a></li>
492 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memstat.html">memstat - Gather statistics from a server
</a><ul>
493 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memstat.html#synopsis">SYNOPSIS
</a></li>
494 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memstat.html#description">DESCRIPTION
</a></li>
495 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memstat.html#options">OPTIONS
</a></li>
496 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memstat.html#see-also">SEE ALSO
</a></li>
499 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memexist.html">memexist - Check for the existence of a key
</a><ul>
500 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memexist.html#synopsis">SYNOPSIS
</a></li>
501 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memexist.html#description">DESCRIPTION
</a></li>
502 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memexist.html#options">OPTIONS
</a></li>
503 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memexist.html#see-also">SEE ALSO
</a></li>
506 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memparse.html">memparse - Parse an option string
</a><ul>
507 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memparse.html#synopsis">SYNOPSIS
</a></li>
508 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memparse.html#description">DESCRIPTION
</a></li>
509 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memparse.html#options">OPTIONS
</a></li>
510 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memparse.html#see-also">SEE ALSO
</a></li>
513 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memping.html">memping - Test to see if a server is available.
</a><ul>
514 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memping.html#synopsis">SYNOPSIS
</a></li>
515 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memping.html#description">DESCRIPTION
</a></li>
516 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memping.html#options">OPTIONS
</a></li>
517 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memping.html#see-also">SEE ALSO
</a></li>
520 <li class=
"toctree-l1"><a class=
"reference internal" href=
"bin/memtouch.html">memtouch - Touches a key.
</a><ul>
521 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memtouch.html#synopsis">SYNOPSIS
</a></li>
522 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memtouch.html#description">DESCRIPTION
</a></li>
523 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memtouch.html#options">OPTIONS
</a></li>
524 <li class=
"toctree-l2"><a class=
"reference internal" href=
"bin/memtouch.html#see-also">SEE ALSO
</a></li>
528 <p class=
"caption"><span class=
"caption-text">Libhashkit
</span></p>
530 <li class=
"toctree-l1"><a class=
"reference internal" href=
"libhashkit.html">Introducing libhashkit
</a><ul>
531 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libhashkit.html#description">DESCRIPTION
</a></li>
532 <li class=
"toctree-l2"><a class=
"reference internal" href=
"libhashkit.html#see-also">SEE ALSO
</a></li>
535 <li class=
"toctree-l1"><a class=
"reference internal" href=
"hashkit_create.html">Creating a hashkit structure
</a><ul>
536 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_create.html#synopsis">SYNOPSIS
</a></li>
537 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_create.html#description">DESCRIPTION
</a></li>
538 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_create.html#return-value">RETURN VALUE
</a></li>
539 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_create.html#see-also">SEE ALSO
</a></li>
542 <li class=
"toctree-l1"><a class=
"reference internal" href=
"hashkit_functions.html">Available Hashes
</a><ul>
543 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_functions.html#synopsis">SYNOPSIS
</a></li>
544 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_functions.html#description">DESCRIPTION
</a></li>
545 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_functions.html#return-value">RETURN VALUE
</a></li>
546 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_functions.html#see-also">SEE ALSO
</a></li>
549 <li class=
"toctree-l1"><a class=
"reference internal" href=
"hashkit_value.html">hashkit_value
</a><ul>
550 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_value.html#synopsis">SYNOPSIS
</a></li>
551 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_value.html#description">DESCRIPTION
</a></li>
552 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_value.html#return-value">RETURN VALUE
</a></li>
553 <li class=
"toctree-l2"><a class=
"reference internal" href=
"hashkit_value.html#see-also">SEE ALSO
</a></li>
564 <section data-toggle=
"wy-nav-shift" class=
"wy-nav-content-wrap">
567 <nav class=
"wy-nav-top" aria-label=
"top navigation">
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601 <li>Appending or Prepending to data on the server
</li>
604 <li class=
"wy-breadcrumbs-aside">
615 <div role=
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618 <div class=
"section" id=
"appending-or-prepending-to-data-on-the-server">
619 <h1>Appending or Prepending to data on the server
<a class=
"headerlink" href=
"#appending-or-prepending-to-data-on-the-server" title=
"Permalink to this headline">¶
</a></h1>
620 <p id=
"index-0">Appending or Prepending to data on the server
</p>
621 <div class=
"section" id=
"synopsis">
622 <h2>SYNOPSIS
<a class=
"headerlink" href=
"#synopsis" title=
"Permalink to this headline">¶
</a></h2>
623 <p>#include
<libmemcached/memcached.h
></p>
624 <dl class=
"function">
625 <dt id=
"c.memcached_prepend">
626 <a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#c.memcached_return_t" title=
"memcached_return_t">memcached_return_t
</a> <code class=
"sig-name descname">memcached_prepend
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"memcached_create.html#c.memcached_st" title=
"memcached_st">memcached_st
</a><em> *ptr
</em>, const char
<em> *key
</em>, size_t
<em> key_length
</em>, const char
<em> *value
</em>, size_t
<em> value_length
</em>, time_t
<em> expiration
</em>,
<a class=
"reference internal" href=
"types.html#c.uint32_t" title=
"uint32_t">uint32_t
</a><em> flags
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#c.memcached_prepend" title=
"Permalink to this definition">¶
</a></dt>
629 <dl class=
"function">
630 <dt id=
"c.memcached_append">
631 <a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#c.memcached_return_t" title=
"memcached_return_t">memcached_return_t
</a> <code class=
"sig-name descname">memcached_append
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"memcached_create.html#c.memcached_st" title=
"memcached_st">memcached_st
</a><em> *ptr
</em>, const char
<em> *key
</em>, size_t
<em> key_length
</em>, const char
<em> *value
</em>, size_t
<em> value_length
</em>, time_t
<em> expiration
</em>,
<a class=
"reference internal" href=
"types.html#c.uint32_t" title=
"uint32_t">uint32_t
</a><em> flags
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#c.memcached_append" title=
"Permalink to this definition">¶
</a></dt>
634 <dl class=
"function">
635 <dt id=
"c.memcached_prepend_by_key">
636 <a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#c.memcached_return_t" title=
"memcached_return_t">memcached_return_t
</a> <code class=
"sig-name descname">memcached_prepend_by_key
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"memcached_create.html#c.memcached_st" title=
"memcached_st">memcached_st
</a><em> *ptr
</em>, const char
<em> *group_key
</em>, size_t
<em> group_key_length
</em>, const char
<em> *key
</em>, size_t
<em> key_length
</em>, const char
<em> *value
</em>, size_t
<em> value_length
</em>, time_t
<em> expiration
</em>,
<a class=
"reference internal" href=
"types.html#c.uint32_t" title=
"uint32_t">uint32_t
</a><em> flags
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#c.memcached_prepend_by_key" title=
"Permalink to this definition">¶
</a></dt>
639 <dl class=
"function">
640 <dt id=
"c.memcached_append_by_key">
641 <a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#c.memcached_return_t" title=
"memcached_return_t">memcached_return_t
</a> <code class=
"sig-name descname">memcached_append_by_key
</code><span class=
"sig-paren">(
</span><a class=
"reference internal" href=
"memcached_create.html#c.memcached_st" title=
"memcached_st">memcached_st
</a><em> *ptr
</em>, const char
<em> *group_key
</em>, size_t
<em> group_key_length
</em>, const char
<em> *key
</em>, size_t
<em> key_length
</em>, const char
<em> *value
</em>, size_t
<em> value_length
</em>, time_t
<em> expiration
</em>,
<a class=
"reference internal" href=
"types.html#c.uint32_t" title=
"uint32_t">uint32_t
</a><em> flags
</em><span class=
"sig-paren">)
</span><a class=
"headerlink" href=
"#c.memcached_append_by_key" title=
"Permalink to this definition">¶
</a></dt>
644 <p>Compile and link with -lmemcached
</p>
646 <div class=
"section" id=
"description">
647 <h2>DESCRIPTION
<a class=
"headerlink" href=
"#description" title=
"Permalink to this headline">¶
</a></h2>
648 <p><a class=
"reference internal" href=
"#c.memcached_prepend" title=
"memcached_prepend"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_prepend()
</span></code></a> and memcached_append are used to
649 modify information on a server. All methods take a key, and its length to
650 store the object. Keys are currently limited to
250 characters when using
651 either a version of memcached which is
1.4 or below, or when using the text
652 protocol. You must supply both a value and a length. Optionally you
653 may test an expiration time for the object and a
16 byte value (it is
654 meant to be used as a bitmap). “flags” is a
4byte space that is stored
655 alongside of the main value. Many sub libraries make use of this field,
656 so in most cases users should avoid making use of it.
</p>
657 <p><a class=
"reference internal" href=
"#c.memcached_prepend" title=
"memcached_prepend"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_prepend()
</span></code></a> places a segment of data before the last piece
658 of data stored. Currently expiration and key are not used in the server.
</p>
659 <p><a class=
"reference internal" href=
"#c.memcached_append" title=
"memcached_append"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_append()
</span></code></a> places a segment of data at the end of the last
660 piece of data stored. Currently expiration and key are not used in the server.
</p>
661 <p><a class=
"reference internal" href=
"#c.memcached_prepend_by_key" title=
"memcached_prepend_by_key"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_prepend_by_key()
</span></code></a> and
662 <a class=
"reference internal" href=
"#c.memcached_append_by_key" title=
"memcached_append_by_key"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_append_by_key()
</span></code></a> methods both behave in a similar
663 method as the non key methods. The difference is that they use their
664 group_key parameter to map objects to particular servers.
</p>
665 <p>If you are looking for performance,
<a class=
"reference internal" href=
"memcached_set.html#c.memcached_set" title=
"memcached_set"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_set()
</span></code></a> with non-blocking
666 IO is the fastest way to store data on the server.
</p>
667 <p>All of the above functions are tested with the
668 <a class=
"reference internal" href=
"memcached_behavior.html#c.MEMCACHED_BEHAVIOR_USE_UDP" title=
"MEMCACHED_BEHAVIOR_USE_UDP"><code class=
"xref c c-type docutils literal notranslate"><span class=
"pre">MEMCACHED_BEHAVIOR_USE_UDP
</span></code></a> behavior enabled. However, when using
669 these operations with this behavior on, there are limits to the size of the
670 payload being sent to the server. The reason for these limits is that the
671 Memcached Server does not allow multi-datagram requests
672 and the current server implementation sets a datagram size to
1400 bytes. Due
673 to protocol overhead, the actual limit of the user supplied data is less than
674 1400 bytes and depends on the protocol in use as, well as the operation being
675 executed. When running with the binary protocol,
676 <a class=
"reference internal" href=
"memcached_behavior.html#c.MEMCACHED_BEHAVIOR_BINARY_PROTOCOL" title=
"MEMCACHED_BEHAVIOR_BINARY_PROTOCOL"><code class=
"xref c c-type docutils literal notranslate"><span class=
"pre">MEMCACHED_BEHAVIOR_BINARY_PROTOCOL
</span></code></a>, the size of the key,value,
677 flags and expiry combined may not exceed
1368 bytes. When running with the
678 ASCII protocol, the exact limit fluctuates depending on which function is
679 being executed and whether the function is a cas operation or not. For
680 non-cas ASCII set operations, there are at least
1335 bytes available
681 to split among the key, key_prefix, and value; for cas ASCII operations
682 there are at least
1318 bytes available to split among the key, key_prefix
683 and value. If the total size of the command, including overhead, exceeds
684 1400 bytes, a
<a class=
"reference internal" href=
"client_errors/MEMCACHED_WRITE_FAILURE.html#c.MEMCACHED_WRITE_FAILURE" title=
"MEMCACHED_WRITE_FAILURE"><code class=
"xref c c-type docutils literal notranslate"><span class=
"pre">MEMCACHED_WRITE_FAILURE
</span></code></a> will be returned.
</p>
686 <div class=
"section" id=
"return">
687 <h2>RETURN
<a class=
"headerlink" href=
"#return" title=
"Permalink to this headline">¶
</a></h2>
688 <p>All methods return a value of type
<a class=
"reference internal" href=
"libmemcached/memcached_return_t.html#c.memcached_return_t" title=
"memcached_return_t"><code class=
"xref c c-type docutils literal notranslate"><span class=
"pre">memcached_return_t
</span></code></a>.
689 On success the value will be
<a class=
"reference internal" href=
"client_errors/MEMCACHED_SUCCESS.html#c.MEMCACHED_SUCCESS" title=
"MEMCACHED_SUCCESS"><code class=
"xref c c-type docutils literal notranslate"><span class=
"pre">MEMCACHED_SUCCESS
</span></code></a>.
690 Use
<a class=
"reference internal" href=
"memcached_strerror.html#c.memcached_strerror" title=
"memcached_strerror"><code class=
"xref c c-func docutils literal notranslate"><span class=
"pre">memcached_strerror()
</span></code></a> to translate this value to a printable
693 <div class=
"section" id=
"see-also">
694 <h2>SEE ALSO
<a class=
"headerlink" href=
"#see-also" title=
"Permalink to this headline">¶
</a></h2>
695 <p><em class=
"manpage">memcached(
1)
</em> <em class=
"manpage">libmemcached(
3)
</em> <em class=
"manpage">memcached_strerror(
3)
</em> <em class=
"manpage">memcached_set(
3)
</em> <em class=
"manpage">memcached_add(
3)
</em> <em class=
"manpage">memcached_cas(
3)
</em> <em class=
"manpage">memcached_replace(
3)
</em></p>
705 <div class=
"rst-footer-buttons" role=
"navigation" aria-label=
"footer navigation">
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"memcached_cas.html" class=
"btn btn-neutral float-right" title=
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<span class=
"fa fa-arrow-circle-right"></span></a>
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"btn btn-neutral float-left" title=
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