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| <div class="left-nav__overlay"></div> |
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| <article data-swiftype-index='true'> |
| |
| <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/2.9.0/thin-clients/getting-started-with-thin-clients">Thin Clients</a> section. |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="imageblock"> |
| <div class="content"> |
| <img src="/docs/2.9.0/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’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/2.9.0/clustering/tcp-ip-discovery">TCP/IP Discovery</a> is designed and optimized for 100s of nodes.</p> |
| </li> |
| <li> |
| <p><a href="/docs/2.9.0/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> |
| </article> |
| <nav class="right-nav" data-swiftype-index='false'> |
| <ul class="sectlevel1"> |
| <li><a href="#overview">Overview</a></li> |
| <li><a href="#discovery-mechanisms">Discovery Mechanisms</a></li> |
| </ul> |
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