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| |
| <h1 id="Apache_Ignite_Core_Cluster" data-uid="Apache.Ignite.Core.Cluster" class="text-break">Namespace Apache.Ignite.Core.Cluster |
| </h1> |
| <div class="markdown level0 summary"></div> |
| <div class="markdown level0 conceptual"></div> |
| <div class="markdown level0 remarks"></div> |
| <h3 id="classes">Classes |
| </h3> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.ClusterGroupEmptyException.html">ClusterGroupEmptyException</a></h4> |
| <section><p>Indicates an illegal call on empty projection. Thrown by projection when operation |
| that requires at least one node is called on empty projection.</p> |
| </section> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.ClusterTopologyException.html">ClusterTopologyException</a></h4> |
| <section><p>Indicates an error with grid topology (e.g., crashed node, etc.)</p> |
| </section> |
| <h3 id="interfaces">Interfaces |
| </h3> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.IBaselineNode.html">IBaselineNode</a></h4> |
| <section><p>Baseline topology node (see <a class="xref" href="Apache.Ignite.Core.Cluster.ICluster.html#Apache_Ignite_Core_Cluster_ICluster_GetBaselineTopology">GetBaselineTopology()</a>).</p> |
| </section> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.ICluster.html">ICluster</a></h4> |
| <section><p>Represents whole cluster (group of all nodes in a cluster). |
| <p> |
| All members are thread-safe and may be used concurrently from multiple threads.</p> |
| </section> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.IClusterGroup.html">IClusterGroup</a></h4> |
| <section><p>Defines grid projection which represents a common functionality over a group of nodes. |
| Grid projection allows to group Ignite nodes into various subgroups to perform distributed |
| operations on them. All ForXXX(...)' methods will create a child grid projection |
| from existing projection. If you create a new projection from current one, then the resulting |
| projection will include a subset of nodes from current projection. The following code snippet |
| shows how to create grid projections:</p> |
| <pre><code>var g = Ignition.GetIgnite(); |
| |
| // Projection over remote nodes. |
| var remoteNodes = g.ForRemotes(); |
| |
| // Projection over random remote node. |
| var randomNode = g.ForRandom(); |
| |
| // Projection over all nodes with cache named "myCache" enabled. |
| var cacheNodes = g.ForCacheNodes("myCache"); |
| |
| // Projection over all nodes that have user attribute "group" set to value "worker". |
| var workerNodes = g.ForAttribute("group", "worker");</code></pre> |
| <p>Grid projection provides functionality for executing tasks and closures over |
| nodes in this projection using <a class="xref" href="Apache.Ignite.Core.Cluster.IClusterGroup.html#Apache_Ignite_Core_Cluster_IClusterGroup_GetCompute">GetCompute()</a>. |
| <p> |
| All members are thread-safe and may be used concurrently from multiple threads.</p> |
| </section> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.IClusterMetrics.html">IClusterMetrics</a></h4> |
| <section><p>Represents runtime information of a cluster. Apart from obvious |
| statistical value, this information is used for implementation of |
| load balancing, failover, and collision SPIs. For example, collision SPI |
| in combination with fail-over SPI could check if other nodes don't have |
| any active or waiting jobs and fail-over some jobs to those nodes. |
| <p> |
| Node metrics for any node can be accessed via <a class="xref" href="Apache.Ignite.Core.Cluster.IClusterNode.html#Apache_Ignite_Core_Cluster_IClusterNode_GetMetrics">GetMetrics()</a> |
| method. Keep in mind that there will be a certain network delay (usually |
| equal to heartbeat delay) for the accuracy of node metrics. However, when accessing |
| metrics on local node the metrics are always accurate and up to date.</p> |
| </section> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.IClusterNode.html">IClusterNode</a></h4> |
| <section><p>Interface representing a single cluster node. Use <a class="xref" href="Apache.Ignite.Core.Cluster.IClusterNode.html#Apache_Ignite_Core_Cluster_IClusterNode_GetAttribute__1_System_String_">GetAttribute<T>(String)</a> or |
| <a class="xref" href="Apache.Ignite.Core.Cluster.IClusterNode.html#Apache_Ignite_Core_Cluster_IClusterNode_GetMetrics">GetMetrics()</a> to get static and dynamic information about remote nodes. |
| You can get a list of all nodes in grid by calling <a class="xref" href="Apache.Ignite.Core.Cluster.IClusterGroup.html#Apache_Ignite_Core_Cluster_IClusterGroup_GetNodes">GetNodes()</a> |
| on <a class="xref" href="Apache.Ignite.Core.IIgnite.html">IIgnite</a> instance. |
| <p> |
| You can use Ignite node attributes to provide static information about a node. |
| This information is initialized once within grid, during node startup, and |
| remains the same throughout the lifetime of a node. |
| <p> |
| All members are thread-safe and may be used concurrently from multiple threads.</p> |
| </section> |
| <h4><a class="xref" href="Apache.Ignite.Core.Cluster.IClusterNodeFilter.html">IClusterNodeFilter</a></h4> |
| <section><p>Represents cluster node filter.</p> |
| </section> |
| </article> |
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