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| <h3 id="pre-requisite">Pre-requisite</h3> |
| <p>Gearpump cluster can be installed on Windows OS and Linux.</p> |
| <p>Before installation, you need to decide how many machines are used to run this cluster.</p> |
| <p>For each machine, the requirements are listed in table below.</p> |
| <p><strong>Table: Environment requirement on single machine</strong></p> |
| <table> |
| <thead> |
| <tr> |
| <th>Resource</th> |
| <th>Requirements</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>Memory</td> |
| <td>2GB free memory is required to run the cluster. For any production system, 32GB memory is recommended.</td> |
| </tr> |
| <tr> |
| <td>Java</td> |
| <td>JRE 6 or above</td> |
| </tr> |
| <tr> |
| <td>User permission</td> |
| <td>Root permission is not required</td> |
| </tr> |
| <tr> |
| <td>Network Ethernet</td> |
| <td>(TCP/IP)</td> |
| </tr> |
| <tr> |
| <td>CPU</td> |
| <td>Nothing special</td> |
| </tr> |
| <tr> |
| <td>HDFS installation</td> |
| <td>Default is not required. You only need to install it when you want to store the application jars in HDFS.</td> |
| </tr> |
| <tr> |
| <td>Kafka installation</td> |
| <td>Default is not required. You need to install Kafka when you want the at-least once message delivery feature. Currently, the only supported data source for this feature is Kafka</td> |
| </tr> |
| </tbody> |
| </table> |
| <p><strong>Table: The default port used in Gearpump:</strong></p> |
| <table> |
| <thead> |
| <tr> |
| <th>usage</th> |
| <th>Port</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>Dashboard UI</td> |
| <td>8090</td> |
| <td>Web UI.</td> |
| </tr> |
| <tr> |
| <td>Dashboard web socket service</td> |
| <td>8091</td> |
| <td>UI backend web socket service for long connection.</td> |
| </tr> |
| <tr> |
| <td>Master port</td> |
| <td>3000</td> |
| <td>Every other role like worker, appmaster, executor, user use this port to communicate with Master.</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>You need to ensure that your firewall has not banned these ports to ensure Gearpump can work correctly. |
| And you can modify the port configuration. Check <a href="../deployment-configuration">Configuration</a> section for details. </p> |
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