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Kalyanasundaram Somasundaram
2020-12-09 13:51:05 +05:50
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big_data/evolution/index.html
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@@ -1085,22 +1085,26 @@ What is the output of running the pig queries in the right column against the da
</ol> </ol>
<p><img alt="Pig Example" src="../images/pig_example.png" /></p> <p><img alt="Pig Example" src="../images/pig_example.png" /></p>
<p>Output: <p>Output:
<code>mysql <code>7,Komal,Nayak,24,9848022334,trivendram
7,Komal,Nayak,24,9848022334,trivendram
8,Bharathi,Nambiayar,24,9848022333,Chennai 8,Bharathi,Nambiayar,24,9848022333,Chennai
5,Trupthi,Mohanthy,23,9848022336,Bhuwaneshwar 5,Trupthi,Mohanthy,23,9848022336,Bhuwaneshwar
6,Archana,Mishra,23,9848022335,Chennai</code> 6,Archana,Mishra,23,9848022335,Chennai</code></p>
3. <a href="https://spark.apache.org/"><strong>Spark</strong></a> </li>
1. Spark provides primitives for in-memory cluster computing that allows user programs to load data into a cluster’s memory and query it repeatedly, making it well suited to machine learning algorithms. <li>
4. <a href="https://prestodb.io/"><strong>Presto</strong></a> <p><a href="https://spark.apache.org/"><strong>Spark</strong></a></p>
1. Presto is a high performance, distributed SQL query engine for Big Data. <ol>
2. Its architecture allows users to query a variety of data sources such as Hadoop, AWS S3, Alluxio, MySQL, Cassandra, Kafka, and MongoDB. <li>Spark provides primitives for in-memory cluster computing that allows user programs to load data into a cluster’s memory and query it repeatedly, making it well suited to machine learning algorithms.</li>
3. Example presto query: </ol>
<code>mysql </li>
use studentDB; <li><a href="https://prestodb.io/"><strong>Presto</strong></a><ol>
<li>Presto is a high performance, distributed SQL query engine for Big Data.</li>
<li>Its architecture allows users to query a variety of data sources such as Hadoop, AWS S3, Alluxio, MySQL, Cassandra, Kafka, and MongoDB.</li>
<li>Example presto query:
<code>use studentDB;
show tables; show tables;
SELECT roll_no, name FROM studentDB.studentDetails where section=’A’ limit 5;</code> SELECT roll_no, name FROM studentDB.studentDetails where section=’A’ limit 5;</code>
</br></p> </br></li>
</ol>
</li> </li>
</ol> </ol>
<h1 id="data-serialisation-and-storage">Data Serialisation and storage</h1> <h1 id="data-serialisation-and-storage">Data Serialisation and storage</h1>

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linux_basics/command_line_basics/index.html
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<li> <li>
<p>tail</p> <p>tail</p>
</li> </li>
<li>
<p>more</p>
</li>
<li>
<p>less</p>
</li>
</ul> </ul>
<p>We will now try to understand what each command does and how to use <p>We will now try to understand what each command does and how to use
these commands. You should also practice the given examples on the these commands. You should also practice the given examples on the

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