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<p class="lead">Transactional SQL-on-Hadoop Database</p>
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<p>This page describes how to create the test environment used for Trafodion development, which is intended for people that are contributing to the Trafodion source tree. Please refer to <a href="download.html">Download</a> if you want to try the Trafodion product environment.</p>
<div class="page-header">
<h1 id="prerequisites">Prerequisites</h1>
</div>
<p>The following prerequisites need to be met in order to create a functional Trafodion test environment.</p>
<div class="section">
<h2 id="Passwordless_ssh">Passwordless <tt>ssh</tt></h2>
<p>Check to see if you have passwordless SSH setup correctly.</p>
<div class="source">
<div class="source">
<pre>ssh localhost
Last login: Fri Nov 6 22:44:00 2015 from 192.168.1.9
</pre>
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</div>
<p>If the <b><tt>ssh localhost</tt></b> command prompts for a password, then passwordless <b><tt>ssh</tt></b> is not set up correctly.</p>
<p>The following is an example of setting up passwordless <b><tt>ssh</tt></b> using <b><tt>id_rsa</tt></b> keys. You can choose the method that best represents your environment.</p>
<p>If you already have an existing set of <b><tt>ssh</tt></b> keys. Simply copy both the <b><tt>id_rsa.pub</tt></b> and <b><tt>id_rsa</tt></b> to your <b><tt>~/.ssh</tt></b> directory.</p>
<p>Then, do the following to modify your <b><tt>ssh</tt></b> environment.</p>
<div class="source">
<div class="source">
<pre>cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/id_rsa
echo "NoHostAuthenticationForLocalhost=yes" >>~/.ssh/config
chmod go-w ~/.ssh/config
chmod 755 ~/.ssh; chmod 640 ~/.ssh/authorized_keys; cd ~/.ssh; chmod 700 ..
</pre>
</div>
</div>
<p>If you need to create your keys first, then do the following.</p>
<div class="source">
<div class="source">
<pre>ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/id_rsa.pub
echo "NoHostAuthenticationForLocalhost=yes" >>~/.ssh/config
chmod go-w ~/.ssh/config
chmod 755 ~/.ssh; chmod 640 ~/.ssh/authorized_keys; cd ~/.ssh; chmod 700 ..
</pre>
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<div class="section">
<h2 id="System_Limits">System Limits</h2>
<p>Please check that the system limits in your environment are appropriate for Apache Trafodion. If they are not, then you will need to increase the limits or Trafodion cannot start.</p>
<p>The recommended settings are as follows.</p>
<div class="source">
<div class="source">
<pre>$ ulimit –a
core file size (blocks, -c) 1000000
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 515196
max locked memory (kbytes, -l) 49595556
max memory size (kbytes, -m) unlimited
open files (-n) 32000
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 267263
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
</pre>
</div>
</div>
<p>Please refer to this <a class="externalLink" href="http://www.itworld.com/article/2693414/setting-limits-with-ulimit.html">article</a> for information on how you change system limits.</p>
<h1 id="setup">Setup</h1>
<p>You can create a Trafodion test environment using a:</p>
<ul>
<li><b>Pre-Installed Hadoop</b>: Trafodion installation on a system that already has a compatible version of Hadoop installed</li>
<li><b>Local Hadoop</b>: You install a Hadoop environment using the <b><tt>install_local_hadoop</tt></b> script</li>
</ul>
<p>Your installation approach depends on whether you already have installed Hadoop.</p>
</div>
<div class="section">
<h2 id="Pre-Installed_Hadoop">Pre-Installed Hadoop</h2>
<p>Use the following instructions if you’re installing Trafodion on a pre-installed Hadoop environment. </p>
<div class="section">
<h3 id="Build_Binary_tar_Files">Build Binary tar Files</h3>
<p>Build the Trafodion binary tar files.</p>
<div class="source">
<div class="source">
<pre>cd <Trafodion source directory>
make package
</pre>
</div>
</div>
</div>
<div class="section">
<h3 id="Install_Trafodion">Install Trafodion</h3>
<p>Please refer to the installation instructions described in the <a href="install.html">Installation</a> page.</p>
</div>
</div>
<div class="section">
<h2 id="Local_Hadoop">Local Hadoop</h2>
<p>Use the following instructions if you need to install a local Hadoop environment.</p>
<div class="section">
<h3 id="Run_install_local_hadoop">Run <tt>install_local_hadoop</tt></h3>
<p>The <b><tt>install_local_hadoop</tt></b> script downloads compatible versions of Hadoop, HBase, Hive, and MySQL. Then, it starts Trafodion.</p>
<div class="alert alert-dismissible alert-info">
<button type="button" class="close" data-dismiss="alert"></button>
<p style="color:black"><b>Time Saver</b></p>
<p style="color:black"><b>```install_local_hadoop```</b> downloads Hadoop, HBase, Hive, and MySql jar files from the Internet. To avoid this overhead, you can download the required files into a separate directory and set the environment variable <b>```MY_LOCAL_SW_DIST```</b> to point to this directory.</p>
</div>
<table border="0" class="bodyTable table table-striped table-hover">
<thead>
<tr class="a">
<th>Command </th>
<th>Usage</th>
</tr>
</thead>
<tbody>
<tr class="b">
<td><b><tt>install_local_hadoop</tt></b> </td>
<td>Uses default ports for all services.</td>
</tr>
<tr class="a">
<td><b><tt>install_local_hadoop -p fromDisplay</tt></b> </td>
<td>Start Hadoop with a port number range determined from the DISPLAY environment variable.</td>
</tr>
<tr class="b">
<td><b><tt>install_local_hadoop -p rand</tt></b> </td>
<td>Start with any random port number range between 9000 and 49000.</td>
</tr>
<tr class="a">
<td><b><tt>install_local_hadoop -p <port></tt></b> </td>
<td>Start with the specified port number.</td>
</tr>
</tbody>
</table>
<p>For a list of ports that get configured and their default values, please refer to <a href="port-assignment.html">Port Assignments</a>.</p>
</div>
<div class="section">
<h3 id="Sample_Procedure">Sample Procedure</h3>
<p>Start a new <b><tt>ssh</tt></b> session and ensure that the Trafodion environmental variables are loaded.</p>
<div class="source">
<div class="source">
<pre>cd <Trafodion source directory>
source ./env.sh
</pre>
</div>
</div>
<p>Install the Hadoop software.</p>
<div class="source">
<div class="source">
<pre>cd $MY_SQROOT/sql/scripts
install_local_hadoop
./install_traf_components
</pre>
</div>
</div>
<p>Verify installation.</p>
<div class="source">
<div class="source">
<pre>$ swstatus
6 java servers and 2 mysqld processes are running
713 NameNode
19513 HMaster
1003 SecondaryNameNode
838 DataNode
1173 ResourceManager
1298 NodeManager
</pre>
</div>
</div>
<p>Six java servers as shown above and two mysqld processes should be running.</p>
<h1 id="install_and_build_trafodion">Install and Build Trafodion</h1>
<p>Please refer to <a href="code.html">Modify Code</a> for information on how to install and build Trafodion from its source code.</p>
<h1 id="new_source_download">New Source Download</h1>
<p>You need to do the following each time you download new source code.</p>
<div class="source">
<div class="source">
<pre>cd <Trafodion source directory>
source ./env.sh
cd $MY_SQROOT/etc
# delete ms.env, if it exists
rm ms.env
cd $MY_SQROOT/sql/scripts
sqgen
</pre>
</div>
</div>
<h1 id="manage">Manage</h1>
<p>Please refer to <a href="manage-dev-environment.html">Manage Development Environment</a> for instructions.</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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<span>Disclaimer: Apache Trafodion is an effort undergoing incubation at the Apache Software Foundation (ASF), sponsored by the Apache Incubator PMC.
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