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 191   <div class="section" id="behaviors-of-the-library">
 192 <h1>Behaviors of the library<a class="headerlink" href="#behaviors-of-the-library" title="Permalink to this headline">¶</a></h1>
 193 <p>Manipulate the behavior of a memcached_st structure.</p>
 194 <div class="section" id="synopsis">
 195 <h2>SYNOPSIS<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
 196 <dl class="docutils">
 197 <dt>#include &lt;libmemcached/memcached.h&gt;</dt>
 198 <dd>Compile and link with -lmemcached</dd>
 199 </dl>
 200 <dl class="function">
 201 <dt id="_CPPv422memcached_behavior_getP12memcached_st20memcached_behavior_t">
 202 <span id="_CPPv322memcached_behavior_getP12memcached_st20memcached_behavior_t"></span><span id="_CPPv222memcached_behavior_getP12memcached_st20memcached_behavior_t"></span><span id="memcached_behavior_get__memcached_stP.memcached_behavior_t"></span>uint64_t <code class="descname">memcached_behavior_get</code><span class="sig-paren">(</span><a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st">memcached_st</a> *<em>ptr</em>, <a class="reference internal" href="#_CPPv420memcached_behavior_t" title="memcached_behavior_t">memcached_behavior_t</a> <em>flag</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv422memcached_behavior_getP12memcached_st20memcached_behavior_t" title="Permalink to this definition">¶</a><br /></dt>
 203 <dd><table class="docutils field-list" frame="void" rules="none">
 204 <col class="field-name" />
 205 <col class="field-body" />
 206 <tbody valign="top">
 207 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
 208 <li><strong>ptr</strong> -- pointer to initialized <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> struct</li>
 209 <li><strong>flag</strong> -- <a class="reference internal" href="#_CPPv420memcached_behavior_t" title="memcached_behavior_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_t</span></code></a> to query</li>
 210 </ul>
 211 </td>
 212 </tr>
 213 <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">the vaue set for <a class="reference internal" href="#_CPPv422memcached_behavior_getP12memcached_st20memcached_behavior_t" title="memcached_behavior_get::flag"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">flag</span></code></a></p>
 214 </td>
 215 </tr>
 216 </tbody>
 217 </table>
 218 </dd></dl>
 219
 220 <dl class="function">
 221 <dt id="_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t">
 222 <span id="_CPPv322memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t"></span><span id="_CPPv222memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t"></span><span id="memcached_behavior_set__memcached_stP.memcached_behavior_t.uint64_t"></span><a class="reference internal" href="memcached_return_t.html#_CPPv418memcached_return_t" title="memcached_return_t">memcached_return_t</a> <code class="descname">memcached_behavior_set</code><span class="sig-paren">(</span><a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st">memcached_st</a> *<em>ptr</em>, <a class="reference internal" href="#_CPPv420memcached_behavior_t" title="memcached_behavior_t">memcached_behavior_t</a> <em>flag</em>, uint64_t <em>data</em><span class="sig-paren">)</span><a class="headerlink" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="Permalink to this definition">¶</a><br /></dt>
 223 <dd><table class="docutils field-list" frame="void" rules="none">
 224 <col class="field-name" />
 225 <col class="field-body" />
 226 <tbody valign="top">
 227 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
 228 <li><strong>ptr</strong> -- pointer to initialized <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> struct</li>
 229 <li><strong>flag</strong> -- <a class="reference internal" href="#_CPPv420memcached_behavior_t" title="memcached_behavior_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_t</span></code></a> to set</li>
 230 <li><strong>data</strong> -- the value to set for <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set::flag"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">flag</span></code></a></li>
 231 </ul>
 232 </td>
 233 </tr>
 234 <tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last"><a class="reference internal" href="memcached_return_t.html#_CPPv418memcached_return_t" title="memcached_return_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_return_t</span></code></a> indicating success</p>
 235 </td>
 236 </tr>
 237 </tbody>
 238 </table>
 239 <div class="versionchanged">
 240 <p><span class="versionmodified">Changed in version 0.17: </span>The <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set::data"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">data</span></code></a> argument of <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a> was changed
 241 from taking a pointer to data value, to taking a uin64_t.</p>
 242 </div>
 243 </dd></dl>
 244
 245 <dl class="type">
 246 <dt id="c.memcached_behavior_t">
 247 enum <a class="reference internal" href="#c.memcached_behavior_t" title="memcached_behavior_t">memcached_behavior_t</a> <code class="descname">memcached_behavior_t</code><a class="headerlink" href="#c.memcached_behavior_t" title="Permalink to this definition">¶</a></dt>
 248 <dd></dd></dl>
 249
 250 <dl class="enum">
 251 <dt id="_CPPv420memcached_behavior_t">
 252 <span id="_CPPv320memcached_behavior_t"></span><span id="_CPPv220memcached_behavior_t"></span><em class="property">enum </em><code class="descname">memcached_behavior_t</code><a class="headerlink" href="#_CPPv420memcached_behavior_t" title="Permalink to this definition">¶</a><br /></dt>
 253 <dd><dl class="enumerator">
 254 <dt id="_CPPv4N20memcached_behavior_t26MEMCACHED_BEHAVIOR_USE_UDPE">
 255 <span id="_CPPv3N20memcached_behavior_t26MEMCACHED_BEHAVIOR_USE_UDPE"></span><span id="_CPPv2N20memcached_behavior_t26MEMCACHED_BEHAVIOR_USE_UDPE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_USE_UDP</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t26MEMCACHED_BEHAVIOR_USE_UDPE" title="Permalink to this definition">¶</a><br /></dt>
 256 <dd><p>Causes <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> to use the UDP transport when communicating with a
 257 memcached server. Not all I/O operations are tested when this behavior
 258 is enabled.</p>
 259 <p>The following operations will return <a class="reference internal" href="memcached_return_t.html#_CPPv4N18memcached_return_t23MEMCACHED_NOT_SUPPORTEDE" title="MEMCACHED_NOT_SUPPORTED"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_NOT_SUPPORTED</span></code></a> when
 260 executed with <a class="reference internal" href="#_CPPv4N20memcached_behavior_t26MEMCACHED_BEHAVIOR_USE_UDPE" title="memcached_behavior_t::MEMCACHED_BEHAVIOR_USE_UDP"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_BEHAVIOR_USE_UDP</span></code></a> enabled:</p>
 261 <ul class="simple">
 262 <li><a class="reference internal" href="memcached_version.html#_CPPv417memcached_versionP12memcached_st" title="memcached_version"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_version()</span></code></a>,</li>
 263 <li><a class="reference internal" href="memcached_stats.html#_CPPv414memcached_statP12memcached_stPcP18memcached_return_t" title="memcached_stat"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_stat()</span></code></a>,</li>
 264 <li><a class="reference internal" href="memcached_get.html#_CPPv413memcached_getP12memcached_stPKc6size_tP6size_tP8uint32_tP18memcached_return_t" title="memcached_get"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_get()</span></code></a>,</li>
 265 <li><a class="reference internal" href="memcached_get.html#_CPPv420memcached_get_by_keyP12memcached_stPKc6size_tPKc6size_tP6size_tP8uint32_tP18memcached_return_t" title="memcached_get_by_key"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_get_by_key()</span></code></a>,</li>
 266 <li><a class="reference internal" href="memcached_get.html#_CPPv414memcached_mgetP12memcached_stPPCKcPK6size_t6size_t" title="memcached_mget"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_mget()</span></code></a>,</li>
 267 <li><a class="reference internal" href="memcached_get.html#_CPPv421memcached_mget_by_keyP12memcached_stPKc6size_tPPCKcPK6size_t6size_t" title="memcached_mget_by_key"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_mget_by_key()</span></code></a>,</li>
 268 <li><a class="reference internal" href="memcached_fetch.html#_CPPv415memcached_fetchP12memcached_stPcP6size_tP6size_tP8uint32_tP18memcached_return_t" title="memcached_fetch"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_fetch()</span></code></a>,</li>
 269 <li><a class="reference internal" href="memcached_get.html#_CPPv422memcached_fetch_resultP12memcached_stP19memcached_result_stP18memcached_return_t" title="memcached_fetch_result"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_fetch_result()</span></code></a>,</li>
 270 <li><a class="reference internal" href="memcached_get.html#_CPPv423memcached_fetch_executeP12memcached_stP20memcached_execute_fnPv8uint32_t" title="memcached_fetch_execute"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_fetch_execute()</span></code></a>.</li>
 271 </ul>
 272 <p>All other operations are tested but are executed in a 'fire-and-forget'
 273 mode, in which once the client has executed the operation, no attempt
 274 will be made to ensure the operation has been received and acted on by
 275 the server.</p>
 276 <p><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> does not allow TCP and UDP servers to be shared within
 277 the same <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> client 'instance'. An attempt to add a TCP
 278 server when this behavior is enabled will result in a
 279 <a class="reference internal" href="memcached_return_t.html#_CPPv4N18memcached_return_t31MEMCACHED_INVALID_HOST_PROTOCOLE" title="MEMCACHED_INVALID_HOST_PROTOCOL"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_INVALID_HOST_PROTOCOL</span></code></a>, as will attempting to add a UDP
 280 server when this behavior has not been enabled.</p>
 281 </dd></dl>
 282
 283 <dl class="enumerator">
 284 <dt id="_CPPv4N20memcached_behavior_t27MEMCACHED_BEHAVIOR_NO_BLOCKE">
 285 <span id="_CPPv3N20memcached_behavior_t27MEMCACHED_BEHAVIOR_NO_BLOCKE"></span><span id="_CPPv2N20memcached_behavior_t27MEMCACHED_BEHAVIOR_NO_BLOCKE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_NO_BLOCK</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t27MEMCACHED_BEHAVIOR_NO_BLOCKE" title="Permalink to this definition">¶</a><br /></dt>
 286 <dd><p>Causes <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> to use asynchronous IO. This is the fastest
 287 transport available for storage functions.</p>
 288 </dd></dl>
 289
 290 <dl class="enumerator">
 291 <dt id="_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SND_TIMEOUTE">
 292 <span id="_CPPv3N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SND_TIMEOUTE"></span><span id="_CPPv2N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SND_TIMEOUTE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_SND_TIMEOUT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SND_TIMEOUTE" title="Permalink to this definition">¶</a><br /></dt>
 293 <dd><p>This sets the microsecond behavior of the socket against the SO_SNDTIMEO
 294 flag.</p>
 295 <p>In cases where you cannot use non-blocking IO this will allow you to
 296 still have timeouts on the sending of data.</p>
 297 </dd></dl>
 298
 299 <dl class="enumerator">
 300 <dt id="_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_RCV_TIMEOUTE">
 301 <span id="_CPPv3N20memcached_behavior_t30MEMCACHED_BEHAVIOR_RCV_TIMEOUTE"></span><span id="_CPPv2N20memcached_behavior_t30MEMCACHED_BEHAVIOR_RCV_TIMEOUTE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_RCV_TIMEOUT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_RCV_TIMEOUTE" title="Permalink to this definition">¶</a><br /></dt>
 302 <dd><p>This sets the microsecond behavior of the socket against the SO_RCVTIMEO
 303 flag.</p>
 304 <p>In cases where you cannot use non-blocking IO this will allow you to
 305 still have timeouts on the reading of data.</p>
 306 </dd></dl>
 307
 308 <dl class="enumerator">
 309 <dt id="_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_TCP_NODELAYE">
 310 <span id="_CPPv3N20memcached_behavior_t30MEMCACHED_BEHAVIOR_TCP_NODELAYE"></span><span id="_CPPv2N20memcached_behavior_t30MEMCACHED_BEHAVIOR_TCP_NODELAYE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_TCP_NODELAY</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_TCP_NODELAYE" title="Permalink to this definition">¶</a><br /></dt>
 311 <dd><p>Disables Nagle's algorithm.
 312 See <a class="reference external" href="https://tools.ietf.org/html/rfc896">RFC 896</a>.</p>
 313 </dd></dl>
 314
 315 <dl class="enumerator">
 316 <dt id="_CPPv4N20memcached_behavior_t23MEMCACHED_BEHAVIOR_HASHE">
 317 <span id="_CPPv3N20memcached_behavior_t23MEMCACHED_BEHAVIOR_HASHE"></span><span id="_CPPv2N20memcached_behavior_t23MEMCACHED_BEHAVIOR_HASHE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_HASH</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t23MEMCACHED_BEHAVIOR_HASHE" title="Permalink to this definition">¶</a><br /></dt>
 318 <dd><p>Set the <a class="reference internal" href="memcached_generate_hash_value.html#_CPPv416memcached_hash_t" title="memcached_hash_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">hash</span> <span class="pre">algorithm</span></code></a> used for keys.</p>
 319 <p>Each hash has its advantages and its weaknesses. If you don't know or
 320 don't care, just go with the default.</p>
 321 </dd></dl>
 322
 323 <dl class="enumerator">
 324 <dt id="_CPPv4N20memcached_behavior_t31MEMCACHED_BEHAVIOR_DISTRIBUTIONE">
 325 <span id="_CPPv3N20memcached_behavior_t31MEMCACHED_BEHAVIOR_DISTRIBUTIONE"></span><span id="_CPPv2N20memcached_behavior_t31MEMCACHED_BEHAVIOR_DISTRIBUTIONE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_DISTRIBUTION</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t31MEMCACHED_BEHAVIOR_DISTRIBUTIONE" title="Permalink to this definition">¶</a><br /></dt>
 326 <dd><p>Setting a <a class="reference internal" href="#_CPPv431memcached_server_distribution_t" title="memcached_server_distribution_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_server_distribution_t</span></code></a> you can enable different
 327 means of distributing values to servers.</p>
 328 <p>The default method is <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_MODULAE" title="MEMCACHED_DISTRIBUTION_MODULA"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_MODULA</span></code></a> (hash of the
 329 key modulo number of servers).</p>
 330 <p>You can enable consistent hashing by setting
 331 <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t33MEMCACHED_DISTRIBUTION_CONSISTENTE" title="MEMCACHED_DISTRIBUTION_CONSISTENT"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_CONSISTENT</span></code></a>. Consistent hashing delivers better
 332 distribution and allows servers to be added to the cluster with minimal
 333 cache losses.</p>
 334 <p>Currently <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t33MEMCACHED_DISTRIBUTION_CONSISTENTE" title="MEMCACHED_DISTRIBUTION_CONSISTENT"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_CONSISTENT</span></code></a> is an alias for the value
 335 <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE" title="MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA</span></code></a>.</p>
 336 </dd></dl>
 337
 338 <dl class="enumerator">
 339 <dt id="_CPPv4N20memcached_behavior_t32MEMCACHED_BEHAVIOR_CACHE_LOOKUPSE">
 340 <span id="_CPPv3N20memcached_behavior_t32MEMCACHED_BEHAVIOR_CACHE_LOOKUPSE"></span><span id="_CPPv2N20memcached_behavior_t32MEMCACHED_BEHAVIOR_CACHE_LOOKUPSE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_CACHE_LOOKUPS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t32MEMCACHED_BEHAVIOR_CACHE_LOOKUPSE" title="Permalink to this definition">¶</a><br /></dt>
 341 <dd><blockquote>
 342 <div><div class="deprecated">
 343 <p><span class="versionmodified">Deprecated since version 0.46(?): </span>DNS lookups are now always cached until an error occurs with the
 344 server.</p>
 345 </div>
 346 </div></blockquote>
 347 <p>Memcached can cache named lookups so that DNS lookups are made only once.</p>
 348 </dd></dl>
 349
 350 <dl class="enumerator">
 351 <dt id="_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SUPPORT_CASE">
 352 <span id="_CPPv3N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SUPPORT_CASE"></span><span id="_CPPv2N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SUPPORT_CASE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_SUPPORT_CAS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_SUPPORT_CASE" title="Permalink to this definition">¶</a><br /></dt>
 353 <dd><p>Support CAS operations (this is not enabled by default at this point in
 354 the server since it imposes a slight performance penalty).</p>
 355 </dd></dl>
 356
 357 <dl class="enumerator">
 358 <dt id="_CPPv4N20memcached_behavior_t25MEMCACHED_BEHAVIOR_KETAMAE">
 359 <span id="_CPPv3N20memcached_behavior_t25MEMCACHED_BEHAVIOR_KETAMAE"></span><span id="_CPPv2N20memcached_behavior_t25MEMCACHED_BEHAVIOR_KETAMAE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_KETAMA</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t25MEMCACHED_BEHAVIOR_KETAMAE" title="Permalink to this definition">¶</a><br /></dt>
 360 <dd><p>Sets the default distribution to
 361 <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE" title="MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA</span></code></a> and the hash to
 362 <a class="reference internal" href="memcached_generate_hash_value.html#_CPPv4N16memcached_hash_t18MEMCACHED_HASH_MD5E" title="MEMCACHED_HASH_MD5"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_HASH_MD5</span></code></a>.</p>
 363 </dd></dl>
 364
 365 <dl class="enumerator">
 366 <dt id="_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_KETAMA_WEIGHTEDE">
 367 <span id="_CPPv3N20memcached_behavior_t34MEMCACHED_BEHAVIOR_KETAMA_WEIGHTEDE"></span><span id="_CPPv2N20memcached_behavior_t34MEMCACHED_BEHAVIOR_KETAMA_WEIGHTEDE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_KETAMA_WEIGHTED</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_KETAMA_WEIGHTEDE" title="Permalink to this definition">¶</a><br /></dt>
 368 <dd><p>Sets the default distribution to
 369 <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE" title="MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA</span></code></a> with the weighted tests.
 370 Makes the default hashing algorithm for keys use <a class="reference internal" href="memcached_generate_hash_value.html#_CPPv4N16memcached_hash_t18MEMCACHED_HASH_MD5E" title="MEMCACHED_HASH_MD5"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_HASH_MD5</span></code></a>.</p>
 371 </dd></dl>
 372
 373 <dl class="enumerator">
 374 <dt id="_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_KETAMA_HASHE">
 375 <span id="_CPPv3N20memcached_behavior_t30MEMCACHED_BEHAVIOR_KETAMA_HASHE"></span><span id="_CPPv2N20memcached_behavior_t30MEMCACHED_BEHAVIOR_KETAMA_HASHE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_KETAMA_HASH</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t30MEMCACHED_BEHAVIOR_KETAMA_HASHE" title="Permalink to this definition">¶</a><br /></dt>
 376 <dd><p>Sets the <a class="reference internal" href="memcached_generate_hash_value.html#_CPPv416memcached_hash_t" title="memcached_hash_t"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">hashing</span> <span class="pre">algorithm</span></code></a> for host mapping on continuum.</p>
 377 </dd></dl>
 378
 379 <dl class="enumerator">
 380 <dt id="_CPPv4N20memcached_behavior_t32MEMCACHED_BEHAVIOR_KETAMA_COMPATE">
 381 <span id="_CPPv3N20memcached_behavior_t32MEMCACHED_BEHAVIOR_KETAMA_COMPATE"></span><span id="_CPPv2N20memcached_behavior_t32MEMCACHED_BEHAVIOR_KETAMA_COMPATE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_KETAMA_COMPAT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t32MEMCACHED_BEHAVIOR_KETAMA_COMPATE" title="Permalink to this definition">¶</a><br /></dt>
 382 <dd><p>Sets the compatibility mode. The value can be set to either
 383 <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_KETAMA_COMPAT_LIBMEMCACHED</span></code> (this is the default) or
 384 <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_KETAMA_COMPAT_SPY</span></code> to be compatible with the SPY Memcached
 385 client for Java.</p>
 386 </dd></dl>
 387
 388 <dl class="enumerator">
 389 <dt id="_CPPv4N20memcached_behavior_t31MEMCACHED_BEHAVIOR_POLL_TIMEOUTE">
 390 <span id="_CPPv3N20memcached_behavior_t31MEMCACHED_BEHAVIOR_POLL_TIMEOUTE"></span><span id="_CPPv2N20memcached_behavior_t31MEMCACHED_BEHAVIOR_POLL_TIMEOUTE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_POLL_TIMEOUT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t31MEMCACHED_BEHAVIOR_POLL_TIMEOUTE" title="Permalink to this definition">¶</a><br /></dt>
 391 <dd><p>Modify the timeout in milliseconds value that is used by poll. The
 392 default value is -1. An signed int must be passed to
 393 <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a> to change this value (this requires casting).
 394 For <a class="reference internal" href="#_CPPv422memcached_behavior_getP12memcached_st20memcached_behavior_t" title="memcached_behavior_get"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_get()</span></code></a> a 'signed int' value will be cast and
 395 returned as 'unsigned long long'.</p>
 396 </dd></dl>
 397
 398 <dl class="enumerator">
 399 <dt id="_CPPv4N20memcached_behavior_t28MEMCACHED_BEHAVIOR_USER_DATAE">
 400 <span id="_CPPv3N20memcached_behavior_t28MEMCACHED_BEHAVIOR_USER_DATAE"></span><span id="_CPPv2N20memcached_behavior_t28MEMCACHED_BEHAVIOR_USER_DATAE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_USER_DATA</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t28MEMCACHED_BEHAVIOR_USER_DATAE" title="Permalink to this definition">¶</a><br /></dt>
 401 <dd><div class="deprecated">
 402 <p><span class="versionmodified">Deprecated since version &lt;: </span>0.30</p>
 403 </div>
 404 </dd></dl>
 405
 406 <dl class="enumerator">
 407 <dt id="_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BUFFER_REQUESTSE">
 408 <span id="_CPPv3N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BUFFER_REQUESTSE"></span><span id="_CPPv2N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BUFFER_REQUESTSE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_BUFFER_REQUESTS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BUFFER_REQUESTSE" title="Permalink to this definition">¶</a><br /></dt>
 409 <dd><p>Enabling buffered IO causes commands to &quot;buffer&quot; instead of being sent.
 410 Any action that gets data causes this buffer to be be sent to the remote
 411 connection. Quiting the connection or closing down the connection will
 412 also cause the buffered data to be pushed to the remote connection.</p>
 413 </dd></dl>
 414
 415 <dl class="enumerator">
 416 <dt id="_CPPv4N20memcached_behavior_t29MEMCACHED_BEHAVIOR_VERIFY_KEYE">
 417 <span id="_CPPv3N20memcached_behavior_t29MEMCACHED_BEHAVIOR_VERIFY_KEYE"></span><span id="_CPPv2N20memcached_behavior_t29MEMCACHED_BEHAVIOR_VERIFY_KEYE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_VERIFY_KEY</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t29MEMCACHED_BEHAVIOR_VERIFY_KEYE" title="Permalink to this definition">¶</a><br /></dt>
 418 <dd><p>Enabling this will cause <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> to test all keys to verify that
 419 they are valid keys.</p>
 420 </dd></dl>
 421
 422 <dl class="enumerator">
 423 <dt id="_CPPv4N20memcached_behavior_t29MEMCACHED_BEHAVIOR_SORT_HOSTSE">
 424 <span id="_CPPv3N20memcached_behavior_t29MEMCACHED_BEHAVIOR_SORT_HOSTSE"></span><span id="_CPPv2N20memcached_behavior_t29MEMCACHED_BEHAVIOR_SORT_HOSTSE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_SORT_HOSTS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t29MEMCACHED_BEHAVIOR_SORT_HOSTSE" title="Permalink to this definition">¶</a><br /></dt>
 425 <dd><p>Enabling this will cause hosts that are added to be placed in the host
 426 list in sorted order. This will defeat consistent hashing.</p>
 427 </dd></dl>
 428
 429 <dl class="enumerator">
 430 <dt id="_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_CONNECT_TIMEOUTE">
 431 <span id="_CPPv3N20memcached_behavior_t34MEMCACHED_BEHAVIOR_CONNECT_TIMEOUTE"></span><span id="_CPPv2N20memcached_behavior_t34MEMCACHED_BEHAVIOR_CONNECT_TIMEOUTE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_CONNECT_TIMEOUTE" title="Permalink to this definition">¶</a><br /></dt>
 432 <dd><p>In non-blocking mode this changes the value of the timeout during socket
 433 connection in milliseconds. Specifying -1 means an infinite time‐out.</p>
 434 </dd></dl>
 435
 436 <dl class="enumerator">
 437 <dt id="_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BINARY_PROTOCOLE">
 438 <span id="_CPPv3N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BINARY_PROTOCOLE"></span><span id="_CPPv2N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BINARY_PROTOCOLE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_BINARY_PROTOCOL</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_BINARY_PROTOCOLE" title="Permalink to this definition">¶</a><br /></dt>
 439 <dd><p>Enable the use of the binary protocol. Please note that you cannot
 440 toggle this flag on an open connection.</p>
 441 </dd></dl>
 442
 443 <dl class="enumerator">
 444 <dt id="_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_IO_MSG_WATERMARKE">
 445 <span id="_CPPv3N20memcached_behavior_t35MEMCACHED_BEHAVIOR_IO_MSG_WATERMARKE"></span><span id="_CPPv2N20memcached_behavior_t35MEMCACHED_BEHAVIOR_IO_MSG_WATERMARKE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_IO_MSG_WATERMARKE" title="Permalink to this definition">¶</a><br /></dt>
 446 <dd><p>Set this value to tune the number of messages that may be sent before
 447 <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> should start to automatically drain the input queue.</p>
 448 <p>Setting this value to high, may cause <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> to deadlock (trying
 449 to send data, but the send will block because the input buffer in the
 450 kernel is full).</p>
 451 </dd></dl>
 452
 453 <dl class="enumerator">
 454 <dt id="_CPPv4N20memcached_behavior_t37MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARKE">
 455 <span id="_CPPv3N20memcached_behavior_t37MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARKE"></span><span id="_CPPv2N20memcached_behavior_t37MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARKE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARK</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t37MEMCACHED_BEHAVIOR_IO_BYTES_WATERMARKE" title="Permalink to this definition">¶</a><br /></dt>
 456 <dd><p>Set this value to tune the number of bytes that may be sent before
 457 <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> should start to automatically drain the input queue (need
 458 at least 10 IO requests sent without reading the input buffer).</p>
 459 <p>Setting this value to high, may cause libmemcached to deadlock (trying
 460 to send data, but the send will block because the input buffer in the
 461 kernel is full).</p>
 462 </dd></dl>
 463
 464 <dl class="enumerator">
 465 <dt id="_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_IO_KEY_PREFETCHE">
 466 <span id="_CPPv3N20memcached_behavior_t34MEMCACHED_BEHAVIOR_IO_KEY_PREFETCHE"></span><span id="_CPPv2N20memcached_behavior_t34MEMCACHED_BEHAVIOR_IO_KEY_PREFETCHE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_IO_KEY_PREFETCH</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t34MEMCACHED_BEHAVIOR_IO_KEY_PREFETCHE" title="Permalink to this definition">¶</a><br /></dt>
 467 <dd><p>The binary protocol works a bit different than the textual protocol in
 468 that a multiget is implemented as a pipe of single get-operations which
 469 are sent to the server in a chunk.</p>
 470 <p>If you are using large multigets from your application, you may improve
 471 the latency of the gets by setting this value so you send out the first
 472 chunk of requests when you hit the specified limit.  It allows the
 473 servers to start processing the requests to send the data back while the
 474 rest of the requests are created and sent to the server.</p>
 475 </dd></dl>
 476
 477 <dl class="enumerator">
 478 <dt id="_CPPv4N20memcached_behavior_t26MEMCACHED_BEHAVIOR_NOREPLYE">
 479 <span id="_CPPv3N20memcached_behavior_t26MEMCACHED_BEHAVIOR_NOREPLYE"></span><span id="_CPPv2N20memcached_behavior_t26MEMCACHED_BEHAVIOR_NOREPLYE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_NOREPLY</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t26MEMCACHED_BEHAVIOR_NOREPLYE" title="Permalink to this definition">¶</a><br /></dt>
 480 <dd><p>Set this value to specify that you really don't care about the result
 481 from your storage commands (set, add, replace, append, prepend).</p>
 482 </dd></dl>
 483
 484 <dl class="enumerator">
 485 <dt id="_CPPv4N20memcached_behavior_t37MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICASE">
 486 <span id="_CPPv3N20memcached_behavior_t37MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICASE"></span><span id="_CPPv2N20memcached_behavior_t37MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICASE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICAS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t37MEMCACHED_BEHAVIOR_NUMBER_OF_REPLICASE" title="Permalink to this definition">¶</a><br /></dt>
 487 <dd><p>Specify the number of replicas <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> should store of each item
 488 (on different servers).</p>
 489 <p>This replication does not dedicate certain memcached servers to store
 490 the replicas in, but instead it will store the replicas together with
 491 all of the other objects (on the 'n' next servers specified in your
 492 server list).</p>
 493 <p>Requires the binary protocol and only supports (M)GET/SET/DELETE.</p>
 494 <p><strong>NOTE</strong>: <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> does not guarantee nor enforce any consistency.</p>
 495 </dd></dl>
 496
 497 <dl class="enumerator">
 498 <dt id="_CPPv4N20memcached_behavior_t41MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READE">
 499 <span id="_CPPv3N20memcached_behavior_t41MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READE"></span><span id="_CPPv2N20memcached_behavior_t41MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READ</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t41MEMCACHED_BEHAVIOR_RANDOMIZE_REPLICA_READE" title="Permalink to this definition">¶</a><br /></dt>
 500 <dd><p>Allows randomizing the replica reads starting point. Normally the read
 501 is done from primary server and in case of failure the read is done from
 502 primary + 1, then primary + 2 all the way to 'n' replicas.</p>
 503 <p>This allows distributing read load to multiple servers with the expense
 504 of more write traffic.</p>
 505 <p><strong>NOTE</strong>: Only errors to communicate with a server are considered
 506 failures, so <a class="reference internal" href="memcached_return_t.html#_CPPv4N18memcached_return_t18MEMCACHED_NOTFOUNDE" title="MEMCACHED_NOTFOUND"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_NOTFOUND</span></code></a> does <em>not</em> account for failure.</p>
 507 </dd></dl>
 508
 509 <dl class="enumerator">
 510 <dt id="_CPPv4N20memcached_behavior_t23MEMCACHED_BEHAVIOR_CORKE">
 511 <span id="_CPPv3N20memcached_behavior_t23MEMCACHED_BEHAVIOR_CORKE"></span><span id="_CPPv2N20memcached_behavior_t23MEMCACHED_BEHAVIOR_CORKE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_CORK</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t23MEMCACHED_BEHAVIOR_CORKE" title="Permalink to this definition">¶</a><br /></dt>
 512 <dd><div class="deprecated">
 513 <p><span class="versionmodified">Deprecated since version ?: </span>This option has been deprecated with the behavior now built in and
 514 used appropriately on selected platforms.</p>
 515 </div>
 516 </dd></dl>
 517
 518 <dl class="enumerator">
 519 <dt id="_CPPv4N20memcached_behavior_t28MEMCACHED_BEHAVIOR_KEEPALIVEE">
 520 <span id="_CPPv3N20memcached_behavior_t28MEMCACHED_BEHAVIOR_KEEPALIVEE"></span><span id="_CPPv2N20memcached_behavior_t28MEMCACHED_BEHAVIOR_KEEPALIVEE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_KEEPALIVE</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t28MEMCACHED_BEHAVIOR_KEEPALIVEE" title="Permalink to this definition">¶</a><br /></dt>
 521 <dd><p>Enable TCP_KEEPALIVE behavior.</p>
 522 </dd></dl>
 523
 524 <dl class="enumerator">
 525 <dt id="_CPPv4N20memcached_behavior_t33MEMCACHED_BEHAVIOR_KEEPALIVE_IDLEE">
 526 <span id="_CPPv3N20memcached_behavior_t33MEMCACHED_BEHAVIOR_KEEPALIVE_IDLEE"></span><span id="_CPPv2N20memcached_behavior_t33MEMCACHED_BEHAVIOR_KEEPALIVE_IDLEE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_KEEPALIVE_IDLE</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t33MEMCACHED_BEHAVIOR_KEEPALIVE_IDLEE" title="Permalink to this definition">¶</a><br /></dt>
 527 <dd><p>Specify time, in seconds, to mark a connection as idle. This is only
 528 available as an option on Linux.</p>
 529 </dd></dl>
 530
 531 <dl class="enumerator">
 532 <dt id="_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZEE">
 533 <span id="_CPPv3N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZEE"></span><span id="_CPPv2N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZEE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZE</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_SEND_SIZEE" title="Permalink to this definition">¶</a><br /></dt>
 534 <dd><p>Find the current size of SO_SNDBUF. A value of 0 means either an error
 535 occurred or no hosts were available. It is safe to assume system default
 536 if this occurs.</p>
 537 <p>If an error occurs you can check the last cached errno to find the
 538 specific error.</p>
 539 </dd></dl>
 540
 541 <dl class="enumerator">
 542 <dt id="_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZEE">
 543 <span id="_CPPv3N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZEE"></span><span id="_CPPv2N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZEE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZE</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_SOCKET_RECV_SIZEE" title="Permalink to this definition">¶</a><br /></dt>
 544 <dd><p>Find the current size of SO_RCVBUF. A value of 0 means either an error
 545 occurred or no hosts were available. It is safe to assume system default
 546 if this occurs.</p>
 547 <p>If an error occurs you can check the last cached errno to find the
 548 specific error.</p>
 549 </dd></dl>
 550
 551 <dl class="enumerator">
 552 <dt id="_CPPv4N20memcached_behavior_t39MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMITE">
 553 <span id="_CPPv3N20memcached_behavior_t39MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMITE"></span><span id="_CPPv2N20memcached_behavior_t39MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMITE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t39MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMITE" title="Permalink to this definition">¶</a><br /></dt>
 554 <dd><div class="deprecated">
 555 <p><span class="versionmodified">Deprecated since version 0.48: </span>See <a class="reference internal" href="#_CPPv4N20memcached_behavior_t40MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERSE" title="memcached_behavior_t::MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS</span></code></a></p>
 556 </div>
 557 <p>Set this value to enable the server be removed after continuous
 558 <a class="reference internal" href="#_CPPv4N20memcached_behavior_t39MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMITE" title="memcached_behavior_t::MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT</span></code></a> times connection failure.</p>
 559 </dd></dl>
 560
 561 <dl class="enumerator">
 562 <dt id="_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTSE">
 563 <span id="_CPPv3N20memcached_behavior_t35MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTSE"></span><span id="_CPPv2N20memcached_behavior_t35MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTSE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t35MEMCACHED_BEHAVIOR_AUTO_EJECT_HOSTSE" title="Permalink to this definition">¶</a><br /></dt>
 564 <dd><div class="deprecated">
 565 <p><span class="versionmodified">Deprecated since version 0.48: </span>See <a class="reference internal" href="#_CPPv4N20memcached_behavior_t40MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERSE" title="memcached_behavior_t::MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS</span></code></a></p>
 566 </div>
 567 <p>If enabled any hosts which have been flagged as disabled will be removed
 568 from the list of servers in the <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> structure. This must be
 569 used in combination with <a class="reference internal" href="#_CPPv4N20memcached_behavior_t39MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMITE" title="memcached_behavior_t::MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_BEHAVIOR_SERVER_FAILURE_LIMIT</span></code></a>.</p>
 570 </dd></dl>
 571
 572 <dl class="enumerator">
 573 <dt id="_CPPv4N20memcached_behavior_t40MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERSE">
 574 <span id="_CPPv3N20memcached_behavior_t40MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERSE"></span><span id="_CPPv2N20memcached_behavior_t40MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERSE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERS</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t40MEMCACHED_BEHAVIOR_REMOVE_FAILED_SERVERSE" title="Permalink to this definition">¶</a><br /></dt>
 575 <dd><p>If enabled any hosts which have been flagged as disabled will be removed
 576 from the list of servers in the <a class="reference internal" href="memcached_create.html#_CPPv412memcached_st" title="memcached_st"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_st</span></code></a> structure.</p>
 577 </dd></dl>
 578
 579 <dl class="enumerator">
 580 <dt id="_CPPv4N20memcached_behavior_t32MEMCACHED_BEHAVIOR_RETRY_TIMEOUTE">
 581 <span id="_CPPv3N20memcached_behavior_t32MEMCACHED_BEHAVIOR_RETRY_TIMEOUTE"></span><span id="_CPPv2N20memcached_behavior_t32MEMCACHED_BEHAVIOR_RETRY_TIMEOUTE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_RETRY_TIMEOUT</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t32MEMCACHED_BEHAVIOR_RETRY_TIMEOUTE" title="Permalink to this definition">¶</a><br /></dt>
 582 <dd><p>When enabled a host which is problematic will only be checked for usage
 583 based on the amount of time set by this behavior. The value is in
 584 seconds.</p>
 585 </dd></dl>
 586
 587 <dl class="enumerator">
 588 <dt id="_CPPv4N20memcached_behavior_t39MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEYE">
 589 <span id="_CPPv3N20memcached_behavior_t39MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEYE"></span><span id="_CPPv2N20memcached_behavior_t39MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEYE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY</code><a class="headerlink" href="#_CPPv4N20memcached_behavior_t39MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEYE" title="Permalink to this definition">¶</a><br /></dt>
 590 <dd><p>When enabled the prefix key will be added to the key when determining
 591 server by hash. See <a class="reference internal" href="memcached_callback.html#_CPPv4N20memcached_callback_t28MEMCACHED_CALLBACK_NAMESPACEE" title="MEMCACHED_CALLBACK_NAMESPACE"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_CALLBACK_NAMESPACE</span></code></a> for additional
 592 information.</p>
 593 </dd></dl>
 594
 595 </dd></dl>
 596
 597 <dl class="type">
 598 <dt id="c.memcached_server_distribution_t">
 599 enum <a class="reference internal" href="#c.memcached_server_distribution_t" title="memcached_server_distribution_t">memcached_server_distribution_t</a> <code class="descname">memcached_server_distribution_t</code><a class="headerlink" href="#c.memcached_server_distribution_t" title="Permalink to this definition">¶</a></dt>
 600 <dd></dd></dl>
 601
 602 <dl class="enum">
 603 <dt id="_CPPv431memcached_server_distribution_t">
 604 <span id="_CPPv331memcached_server_distribution_t"></span><span id="_CPPv231memcached_server_distribution_t"></span><em class="property">enum </em><code class="descname">memcached_server_distribution_t</code><a class="headerlink" href="#_CPPv431memcached_server_distribution_t" title="Permalink to this definition">¶</a><br /></dt>
 605 <dd><dl class="enumerator">
 606 <dt id="_CPPv4N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_MODULAE">
 607 <span id="_CPPv3N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_MODULAE"></span><span id="_CPPv2N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_MODULAE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_MODULA</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_MODULAE" title="Permalink to this definition">¶</a><br /></dt>
 608 <dd><p>Distribute keys by hash modulo number of servers.</p>
 609 </dd></dl>
 610
 611 <dl class="enumerator">
 612 <dt id="_CPPv4N31memcached_server_distribution_t33MEMCACHED_DISTRIBUTION_CONSISTENTE">
 613 <span id="_CPPv3N31memcached_server_distribution_t33MEMCACHED_DISTRIBUTION_CONSISTENTE"></span><span id="_CPPv2N31memcached_server_distribution_t33MEMCACHED_DISTRIBUTION_CONSISTENTE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_CONSISTENT</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t33MEMCACHED_DISTRIBUTION_CONSISTENTE" title="Permalink to this definition">¶</a><br /></dt>
 614 <dd><p>Alias for <a class="reference internal" href="#_CPPv4N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE" title="memcached_server_distribution_t::MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA</span></code></a>.</p>
 615 </dd></dl>
 616
 617 <dl class="enumerator">
 618 <dt id="_CPPv4N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE">
 619 <span id="_CPPv3N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE"></span><span id="_CPPv2N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t40MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMAE" title="Permalink to this definition">¶</a><br /></dt>
 620 <dd><p>Unweighted consistent key distribution.</p>
 621 </dd></dl>
 622
 623 <dl class="enumerator">
 624 <dt id="_CPPv4N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_RANDOME">
 625 <span id="_CPPv3N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_RANDOME"></span><span id="_CPPv2N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_RANDOME"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_RANDOM</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t29MEMCACHED_DISTRIBUTION_RANDOME" title="Permalink to this definition">¶</a><br /></dt>
 626 <dd><p>Distribute keys by <em class="manpage"><a class="manpage reference external" href="https://linux.die.net/man/3/rand">rand(3)</a></em> modulo number of servers.</p>
 627 </dd></dl>
 628
 629 <dl class="enumerator">
 630 <dt id="_CPPv4N31memcached_server_distribution_t44MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPYE">
 631 <span id="_CPPv3N31memcached_server_distribution_t44MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPYE"></span><span id="_CPPv2N31memcached_server_distribution_t44MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPYE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPY</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t44MEMCACHED_DISTRIBUTION_CONSISTENT_KETAMA_SPYE" title="Permalink to this definition">¶</a><br /></dt>
 632 <dd><p>Unweighted consistent key distribution compatible with the SPY client.</p>
 633 </dd></dl>
 634
 635 <dl class="enumerator">
 636 <dt id="_CPPv4N31memcached_server_distribution_t42MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTEDE">
 637 <span id="_CPPv3N31memcached_server_distribution_t42MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTEDE"></span><span id="_CPPv2N31memcached_server_distribution_t42MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTEDE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTED</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t42MEMCACHED_DISTRIBUTION_CONSISTENT_WEIGHTEDE" title="Permalink to this definition">¶</a><br /></dt>
 638 <dd><p>Weighted consistent key distribution.</p>
 639 </dd></dl>
 640
 641 <dl class="enumerator">
 642 <dt id="_CPPv4N31memcached_server_distribution_t37MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKETE">
 643 <span id="_CPPv3N31memcached_server_distribution_t37MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKETE"></span><span id="_CPPv2N31memcached_server_distribution_t37MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKETE"></span><em class="property">enumerator </em><code class="descname">MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKET</code><a class="headerlink" href="#_CPPv4N31memcached_server_distribution_t37MEMCACHED_DISTRIBUTION_VIRTUAL_BUCKETE" title="Permalink to this definition">¶</a><br /></dt>
 644 <dd><p>Consistent key distribution by virtual buckets.</p>
 645 </dd></dl>
 646
 647 </dd></dl>
 648
 649 </div>
 650 <div class="section" id="description">
 651 <h2>DESCRIPTION<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
 652 <p><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">libmemcached</span></code> behavior can be modified by using <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a>.
 653 Default behavior is the library strives to be quick and accurate. Some behavior,
 654 while being faster, can also result in not entirely accurate behavior (for
 655 instance, <a class="reference internal" href="memcached_set.html#_CPPv413memcached_setP12memcached_stPKc6size_tPKc6size_t6time_t8uint32_t" title="memcached_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_set()</span></code></a> will always respond with <a class="reference internal" href="memcached_return_t.html#_CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE" title="MEMCACHED_SUCCESS"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">MEMCACHED_SUCCESS</span></code></a>).</p>
 656 <p><a class="reference internal" href="#_CPPv422memcached_behavior_getP12memcached_st20memcached_behavior_t" title="memcached_behavior_get"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_get()</span></code></a> takes a behavior <code class="docutils literal notranslate"><span class="pre">flag</span></code> and returns whether or not
 657 that behavior is currently enabled in the client.</p>
 658 <p><a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a> changes the value of a particular option of the client.
 659 It takes both a <code class="docutils literal notranslate"><span class="pre">flag</span></code> and a <code class="docutils literal notranslate"><span class="pre">value</span></code>. For simple on or off options you just
 660 need to pass in a value of 1. Calls to <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a> will flush and
 661 reset all connections.</p>
 662 </div>
 663 <div class="section" id="return-value">
 664 <h2>RETURN VALUE<a class="headerlink" href="#return-value" title="Permalink to this headline">¶</a></h2>
 665 <p><a class="reference internal" href="#_CPPv422memcached_behavior_getP12memcached_st20memcached_behavior_t" title="memcached_behavior_get"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_get()</span></code></a> returns either the current value of the key, or 0
 666 or 1 on simple flag behaviors (1 being enabled). <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a>
 667 returns failure or success.</p>
 668 </div>
 669 <div class="section" id="notes">
 670 <h2>NOTES<a class="headerlink" href="#notes" title="Permalink to this headline">¶</a></h2>
 671 <p>The <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">data</span></code> argument of <a class="reference internal" href="#_CPPv422memcached_behavior_setP12memcached_st20memcached_behavior_t8uint64_t" title="memcached_behavior_set"><code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">memcached_behavior_set()</span></code></a> was changed in version
 672 0.17 from taking a pointer to data value, to taking a uin64_t.</p>
 673 </div>
 674 <div class="section" id="see-also">
 675 <h2>SEE ALSO<a class="headerlink" href="#see-also" title="Permalink to this headline">¶</a></h2>
 676 <ul class="simple">
 677 <li><em class="manpage"><a class="manpage reference external" href="https://linux.die.net/man/1/memcached">memcached(1)</a></em></li>
 678 <li><em class="manpage"><a class="manpage reference external" href="https://linux.die.net/man/3/setsockopt">setsockopt(3)</a></em></li>
 679 <li><a class="reference internal" href="../libmemcached.html"><span class="doc">C/C++ Client Library for memcached</span></a></li>
 680 <li><a class="reference internal" href="memcached_strerror.html"><span class="doc">Converting Error Codes to Messages</span></a></li>
 681 </ul>
 682 </div>
 683 </div>
 684
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