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| <p>This page describes how to remove Trafodion and/or a Hadoop distribution.</p> |
| <div class="page-header"> |
| <h1 id="remove_trafodion">Remove Trafodion</h1> |
| </div> |
| <p>Use these instructions to remove Trafodion. </p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <tbody> |
| <tr class="a"> |
| <td> <p><b>NOTE</b></p> <p>You do not need to use the <b><tt>trafodion_uninstaller</tt></b> script if upgrading Trafodion. Instead, use the <b><tt>trafodion_install</tt></b> script, which automatically upgrades the version of Trafodion. Please refer to <a href="install.html">Install</a> for further information.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Run the commands from the first node of the cluster. Do not run them from a machine that is not part of the Trafodion cluster.</p> |
| <div class="section"> |
| <h2 id="Step_1_Stop_Trafodion">Step 1: Stop Trafodion</h2> |
| <p>Do the following:</p> |
| <div class="source"> |
| <div class="source"> |
| <pre>su trafodion |
| cd $MY_SQROOT/sql/scripts or cds |
| sqstop |
| </pre> |
| </div> |
| </div> |
| </div> |
| <div class="section"> |
| <h2 id="Step_2_Run_trafodion_uninstaller">Step 2: Run <b><tt>trafodion_uninstaller</tt></b></h2> |
| <p><b><tt>trafodion_uninstaller</tt></b> accepts the following command options.</p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <thead> |
| <tr class="a"> |
| <th>Option </th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="b"> |
| <td><b><tt>instance <dir-name></tt></b> </td> |
| <td><dir-name> represents the directory path of the Trafodion instance to remove. Run this option from the <b><tt>trafodion</tt></b> user ID.</td> |
| </tr> |
| <tr class="a"> |
| <td><b><tt>--all</tt></b> </td> |
| <td>Completely removes Trafodion, including the <b><tt>trafodion</tt></b> user ID and its /root directory. Run this option from a user ID with <b><tt>sudo</tt></b> access</td> |
| </tr> |
| </tbody> |
| </table> |
| <p><b>Examples</b></p> |
| <div class="source"> |
| <div class="source"> |
| <pre>cd /root/trafodion_downloads/installer |
| # Uninstall Trafodion but leave user IDs and root directory in place |
| ./trafodion_uninstaller --instance /home/trafodion/trafodion |
| # Completely remove Trafodion |
| ./trafodion_uninstaller --all |
| </pre> |
| </div> |
| </div> |
| <h1 id="remove_hadoop_distribution">Remove Hadoop Distribution</h1> |
| <p>Use these instructions of you need to change the Hadoop distribution on your environment.</p> |
| <p><b>Assumption:</b> You’ve already <a href="#Remove_Trafodion">removed Trafodion</a>, if previously installed.</p> |
| </div> |
| <div class="section"> |
| <h2 id="Remove_Cloudera">Remove Cloudera</h2> |
| <p><b><tt>cloudera_uninstall</tt></b> must be run by a user with <b><tt>root</tt></b> privileges. It accepts the following command options.</p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <thead> |
| <tr class="a"> |
| <th>Option </th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="b"> |
| <td><b><tt>--help</tt></b> </td> |
| <td>Print help text and exit.</td> |
| </tr> |
| <tr class="a"> |
| <td><b><tt>--nodes "<node-list></tt></b>" </td> |
| <td><b><tt><node-list</tt></b> represents a space-separated list from which Cloudera should be uninstalled. Quotes are required.</td> |
| </tr> |
| </tbody> |
| </table> |
| <p><b>Example</b></p> |
| <div class="source"> |
| <div class="source"> |
| <pre>cd /root/trafodion_downloads/installer/tools |
| ./cloudera_uninstall --nodes "redhat-1 redhat-2" |
| </pre> |
| </div> |
| </div> |
| </div> |
| <div class="section"> |
| <h2 id="Remove_Hortonworks">Remove Hortonworks</h2> |
| <p><b><tt>hortonworks_uninstall</tt></b> must be run by a user with <b><tt>root</tt></b> privileges. It accepts the following command options.</p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <thead> |
| <tr class="a"> |
| <th>Option </th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="b"> |
| <td><b><tt>--help</tt></b> </td> |
| <td>Print help text and exit.</td> |
| </tr> |
| <tr class="a"> |
| <td><b><tt>--nodes "<node-list></tt></b>" </td> |
| <td><b><tt><node-list</tt></b> represents a space-separated list from which Hortonworks should be uninstalled. Quotes are required.</td> |
| </tr> |
| </tbody> |
| </table> |
| <p><b>Example</b></p> |
| <div class="source"> |
| <div class="source"> |
| <pre>cd /root/trafodion_downloads/installer/tools |
| ./hortonworks_uninstall --nodes "redhat-1 redhat-2" |
| </pre> |
| </div> |
| </div> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <tbody> |
| <tr class="a"> |
| <td> <p><b>NOTE</b></p> <p>During removal, the Ambari Server database must be reset. Type <b><tt>yes</tt></b> when prompted.</p> <p><b>Example</b></p> |
| <div> |
| <pre>Resetting ambari-server |
| **** WARNING **** You are about to reset and clear the Ambari Server database. This will remove all cluster host and configuration |
| information from the database. You will be required to re-configure the Ambari server and re-run the cluster wizard. |
| Are you SURE you want to perform the reset [yes/no] (no)? yes |
| Confirm server reset [yes/no](no)? yes</pre> |
| </div> </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section"> |
| <h2 id="Remove_MapR">Remove MapR</h2> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <tbody> |
| <tr class="a"> |
| <td> <p><b>NOTE</b></p> <p>Trafodion does not currently support MapR. However, the <b><tt>mapr_unistall</tt></b> allows you to remove an existing MapR installation.</p> <p>Follow these instructions to remove MapR and install one of the supported Hadoop distributions before installing Trafodion.</p> </td> |
| </tr> |
| </tbody> |
| </table> |
| <p><b><tt>mapr_uninstall</tt></b> must be run by a user with <b><tt>root</tt></b> privileges. It accepts the following command options.</p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <thead> |
| <tr class="a"> |
| <th>Option </th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="b"> |
| <td><b><tt>--help</tt></b> </td> |
| <td>Print help text and exit.</td> |
| </tr> |
| <tr class="a"> |
| <td><b><tt>--nodes "<node-list></tt></b>" </td> |
| <td><b><tt><node-list</tt></b> represents a space-separated list from which MapR should be uninstalled. Quotes are required.</td> |
| </tr> |
| </tbody> |
| </table> |
| <p>Do the following:</p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <thead> |
| <tr class="a"> |
| <th width="15%">Step</th> |
| <th width="30%">Description</th> |
| <th width="55%">Example</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="b"> |
| <td><b>Download Trafodion</b></td> |
| <td>If you haven't done so already, <a href="download.html">download</a> Trafodion.</td> |
| <td></td> |
| </tr> |
| <tr class="a"> |
| <td><b>Create <tt>trafodion_downloads</tt> Directory</b></td> |
| <td>Place the downloaded <b><tt>trafodion-1.1.<n>.tar.gz</tt></b> and <b><tt>installer-1.1.<n>_v<num>.tar.gz</tt></b> tar files into the <b><tt>trafodion_downloads</tt></b> directory.</td> |
| <td> |
| <div> |
| <pre> |
| mkdir $HOME/trafodion_downloads |
| mv <your-download-path>/trafodion-1.1.<n>.tar.gz $HOME/trafodion_downloads |
| mv <your-download-path>/installer-1.1.<n>_v<num>.tar.gz $HOME/trafodion_downloads |
| cd $HOME/trafodion_downloads</pre> |
| </div> </td> |
| </tr> |
| <tr class="b"> |
| <td><b>Unpack <tt>tar</tt> Files</b></td> |
| <td>Enables access to the Trafodion installation tools.</td> |
| <td> |
| <div> |
| <pre> |
| tar -xzf trafodion-1.1.<n>.tar.gz |
| tar -xzf installer-1.1.<n>_v<num>.tar.gz</pre> |
| </div> </td> |
| </tr> |
| <tr class="a"> |
| <td><b>Run <tt>mapr_uninstall</tt></b></td> |
| <td>Remove the MapR distribution software.</td> |
| <td> |
| <div> |
| <pre> |
| cd /root/trafodion_downloads/installer/tools |
| ./mapr_uninstall --nodes "redhat-1 redhat-2" |
| ./mapr_uninstall</pre> |
| </div> </td> |
| </tr> |
| </tbody> |
| </table> |
| <h1 id="switch_hadoop_distribution">Switch Hadoop Distribution</h1> |
| <p>If needed, you can switch the Hadoop distribution that Trafodion is running on without reinstalling Trafodion.</p> |
| <p>Do the following.</p> |
| </div> |
| <div class="section"> |
| <h2 id="Step_1_Shut_Down_Trafodion">Step 1: Shut Down Trafodion</h2> |
| <div class="source"> |
| <div class="source"> |
| <pre>su trafodion |
| cd $MY_SQROOT/sql/scripts |
| sqstop |
| </pre> |
| </div> |
| </div> |
| </div> |
| <div class="section"> |
| <h2 id="Step_2_Remove_Hadoop_Distribution">Step 2: Remove Hadoop Distribution</h2> |
| <p>Remove the Hadoop Distribution per the instructions above.</p> |
| <table border="0" class="bodyTable table table-striped table-hover"> |
| <thead> |
| <tr class="a"> |
| <th>Hadoop Distribution </th> |
| <th>Instructions</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="b"> |
| <td><b>Cloudera</b> </td> |
| <td><a href="#Remove_Cloudera">Remove Cloudera</a></td> |
| </tr> |
| <tr class="a"> |
| <td><b>Hortonworks</b> </td> |
| <td><a href="#Remove_Hortonworks">Remove Hortonworks</a></td> |
| </tr> |
| <tr class="b"> |
| <td><b>MapR</b> </td> |
| <td><a href="#Remove_MapR">Remove MapR</a></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section"> |
| <h2 id="Step_3_Reinstall_Hadoop_Distribution">Step 3: Reinstall Hadoop Distribution</h2> |
| <p>Refer to <a href="install-preparation.html#Install_Hadoop_Distribution">Install Hadoop Distribution</a>.</p> |
| </div> |
| <div class="section"> |
| <h2 id="Step_4_Run_Trafodion_Installer">Step 4: Run Trafodion Installer</h2> |
| <p>Refer to the <a href="install.html">Install</a>.</p> |
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| <blockquote><a href="http://trafodion.apache.org/">Apache Trafodion</a> is a webscale SQL-on-Hadoop solution enabling transactional or operational |
| workloads on Hadoop. <br /><br />The name "Trafodion" (the Welsh word for transactions, pronounced |
| "Tra-vod-eee-on") was chosen specifically to emphasize the differentiation that |
| Trafodion provides in closing a critical gap in the Hadoop ecosystem.<br /><br /> |
| Trafodion builds on the scalability, elasticity, and flexibility of Hadoop. Trafodion extends |
| Hadoop to provide guaranteed transactional integrity, enabling new kinds of big data |
| applications to run on Hadoop.</blockquote> |
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