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<a href="/docs/latest/persistence/snapshot-directory"
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<a href="/docs/latest/persistence/disk-compression"
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<a href="/docs/latest/persistence/persistence-tuning"
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<a href="/docs/latest/persistence/change-data-capture"
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<a href="/docs/latest/snapshots/snapshots" class='' >Cluster Snapshots</a>
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<a href="/docs/latest/configuring-caches/near-cache"
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<li>
<a href="/docs/latest/data-rebalancing" class='' >Data Rebalancing</a>
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<a href="/docs/latest/data-streaming" class='' >Data Streaming</a>
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<a href="/docs/latest/read-repair"
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<a href="/docs/latest/key-value-api/transactions" class='' >Performing Transactions</a>
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<li><a href="/docs/latest/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
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<li><a href="/docs/latest/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/latest/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
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<li><a href="/docs/latest/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
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<li>
<a href="/docs/latest/machine-learning/preprocessing"
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<li>
<a href="/docs/latest/machine-learning/multiclass-classification"
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<li><a href="/docs/latest/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/latest/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
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<li>
<a href="/docs/latest/machine-learning/recommendation-systems"
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</li>
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</li>
<li>
<a href="/docs/latest/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
</li>
<li>
<a href="/docs/latest/services/services" class='' >Using Ignite Services</a>
</li>
<li>
<a href="/docs/latest/messaging" class='' >Using Ignite Messaging</a>
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<a href="/docs/latest/data-structures/atomic-types"
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</li>
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<a href="/docs/latest/data-structures/countdownlatch"
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<li>
<a href="/docs/latest/data-structures/atomic-sequence"
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</li>
<li>
<a href="/docs/latest/data-structures/semaphore"
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<li>
<a href="/docs/latest/data-structures/id-generator"
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<li>
<a href="/docs/latest/distributed-locks" class='' >Distributed Locks</a>
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<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/clustering/clustering.adoc" target="_blank">Edit</a>
<h1>Clustering</h1>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>In this chapter, we discuss different ways nodes can discover each other to form a cluster.</p>
</div>
<div class="paragraph">
<p>On start-up, a node is assigned either one of the two roles: <em>server node</em> or <em>client node</em>.
Server nodes are the workhorses of the cluster; they cache data, execute compute tasks, etc.
Client nodes join the topology as regular nodes but they do not store data. Client nodes are used to stream data into the cluster and execute user queries.</p>
</div>
<div class="paragraph">
<p>To form a cluster, each node must be able to connect to all other nodes. To ensure that, a proper <a href="#discovery-mechanisms">discovery mechanism</a> must be configured.</p>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
In addition to client nodes, you can use Thin Clients to define and manipulate data in the cluster.
Learn more about the thin clients in the <a href="/docs/latest/thin-clients/getting-started-with-thin-clients">Thin Clients</a> section.
</td>
</tr>
</table>
</div>
<div class="imageblock">
<div class="content">
<img src="/docs/2.13.0/images/ignite_clustering.png" alt="Ignite Cluster">
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="discovery-mechanisms">Discovery Mechanisms</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Nodes can automatically discover each other and form a cluster.
This allows you to scale out when needed without having to restart the whole cluster.
Developers can also leverage Ignite&#8217;s hybrid cloud support that allows establishing connection between private and public clouds such as Amazon Web Services, providing them with the best of both worlds.</p>
</div>
<div class="paragraph">
<p>Ignite provides two implementations of the discovery mechanism intended for different usage scenarios:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="/docs/latest/clustering/tcp-ip-discovery">TCP/IP Discovery</a> is designed and optimized for 100s of nodes.</p>
</li>
<li>
<p><a href="/docs/latest/clustering/zookeeper-discovery">ZooKeeper Discovery</a> that allows scaling Ignite clusters to 100s and 1000s of nodes preserving linear scalability and performance.</p>
</li>
</ul>
</div>
</div>
</div>
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© 2022 The Apache Software Foundation.<br/>
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.
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