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| <div class="title">Apache.Ignite.Core.Cache.Affinity.IAffinityFunction Interface Reference</div> </div> |
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| <p>Represents a function that maps cache keys to cluster nodes. |
| <a href="interface_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_i_affinity_function.html#details">More...</a></p> |
| <table class="memberdecls"> |
| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> |
| Public Member Functions</h2></td></tr> |
| <tr class="memitem:ab925b9d86321a855499acb36f5d734eb"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_i_affinity_function.html#ab925b9d86321a855499acb36f5d734eb">GetPartition</a> (object key)</td></tr> |
| <tr class="memdesc:ab925b9d86321a855499acb36f5d734eb"><td class="mdescLeft"> </td><td class="mdescRight">Gets partition number for a given key starting from 0. Partitioned caches should make sure that keys are about evenly distributed across all partitions from 0 to <a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_i_affinity_function.html#a35d160ca20050641171048473746306f" title="Gets the total number of partitions. ">Partitions</a> for best performance. <a href="#ab925b9d86321a855499acb36f5d734eb">More...</a><br /></td></tr> |
| <tr class="separator:ab925b9d86321a855499acb36f5d734eb"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ad72080a914f72e057787487b6d02ed24"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_i_affinity_function.html#ad72080a914f72e057787487b6d02ed24">RemoveNode</a> (Guid nodeId)</td></tr> |
| <tr class="memdesc:ad72080a914f72e057787487b6d02ed24"><td class="mdescLeft"> </td><td class="mdescRight">Removes node from affinity. This method is called when it is safe to remove disconnected node from affinity mapping. <a href="#ad72080a914f72e057787487b6d02ed24">More...</a><br /></td></tr> |
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| <tr class="memitem:a6c72007bd20c58de58c8a194fbbc690f"><td class="memItemLeft" align="right" valign="top">IEnumerable< IEnumerable< <a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cluster_1_1_i_cluster_node.html">IClusterNode</a> > > </td><td class="memItemRight" valign="bottom"><a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_i_affinity_function.html#a6c72007bd20c58de58c8a194fbbc690f">AssignPartitions</a> (<a class="el" href="class_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_affinity_function_context.html">AffinityFunctionContext</a> context)</td></tr> |
| <tr class="memdesc:a6c72007bd20c58de58c8a194fbbc690f"><td class="mdescLeft"> </td><td class="mdescRight">Gets affinity nodes for a partition. In case of replicated cache, all returned nodes are updated in the same manner. In case of partitioned cache, the returned list should contain only the primary and back up nodes with primary node being always first. <pare> Note that partitioned affinity must obey the following contract: given that node <a href="#a6c72007bd20c58de58c8a194fbbc690f">More...</a><br /></td></tr> |
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| <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="properties"></a> |
| Properties</h2></td></tr> |
| <tr class="memitem:a35d160ca20050641171048473746306f"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_i_affinity_function.html#a35d160ca20050641171048473746306f">Partitions</a><code> [get]</code></td></tr> |
| <tr class="memdesc:a35d160ca20050641171048473746306f"><td class="mdescLeft"> </td><td class="mdescRight">Gets the total number of partitions. <a href="#a35d160ca20050641171048473746306f">More...</a><br /></td></tr> |
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| <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> |
| <div class="textblock"><p>Predefined implementations: RendezvousAffinityFunction, FairAffinityFunction. </p> |
| </div><h2 class="groupheader">Member Function Documentation</h2> |
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| <td class="memname">IEnumerable<IEnumerable<<a class="el" href="interface_apache_1_1_ignite_1_1_core_1_1_cluster_1_1_i_cluster_node.html">IClusterNode</a>> > Apache.Ignite.Core.Cache.Affinity.IAffinityFunction.AssignPartitions </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="class_apache_1_1_ignite_1_1_core_1_1_cache_1_1_affinity_1_1_affinity_function_context.html">AffinityFunctionContext</a> </td> |
| <td class="paramname"><em>context</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p><code>N</code> is primary for some key <code>K</code>, if any other node(s) leave grid and no node joins grid, node <code>N</code> will remain primary for key <code>K</code>. </p> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">context</td><td>The affinity function context.</td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="section return"><dt>Returns</dt><dd>A collection of partitions, where each partition is a collection of nodes, where first node is a primary node, and other nodes are backup nodes. </dd></dl> |
| |
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| <td class="memname">int Apache.Ignite.Core.Cache.Affinity.IAffinityFunction.GetPartition </td> |
| <td>(</td> |
| <td class="paramtype">object </td> |
| <td class="paramname"><em>key</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>Note that for fully replicated caches it is possible to segment key sets among different grid node groups. In that case each node group should return a unique partition number. However, unlike partitioned cache, mappings of keys to nodes in replicated caches are constant and a node cannot migrate from one partition to another. </p> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">key</td><td>Key to get partition for.</td></tr> |
| </table> |
| </dd> |
| </dl> |
| <dl class="section return"><dt>Returns</dt><dd>Partition number for a given key.</dd></dl> |
| |
| </div> |
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| <td class="memname">void Apache.Ignite.Core.Cache.Affinity.IAffinityFunction.RemoveNode </td> |
| <td>(</td> |
| <td class="paramtype">Guid </td> |
| <td class="paramname"><em>nodeId</em></td><td>)</td> |
| <td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <dl class="params"><dt>Parameters</dt><dd> |
| <table class="params"> |
| <tr><td class="paramname">nodeId</td><td>The node identifier.</td></tr> |
| </table> |
| </dd> |
| </dl> |
| |
| </div> |
| </div> |
| <h2 class="groupheader">Property Documentation</h2> |
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| <td class="mlabels-left"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">int Apache.Ignite.Core.Cache.Affinity.IAffinityFunction.Partitions</td> |
| </tr> |
| </table> |
| </td> |
| <td class="mlabels-right"> |
| <span class="mlabels"><span class="mlabel">get</span></span> </td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>All caches should always provide correct partition count which should be the same on all participating nodes. Note that partitions should always be numbered from 0 inclusively to N exclusively without any gaps. </p> |
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