[AWS Lab] VPC – Public Subnet

In this lab, we will learn how to create a public subnet and test it with an EC2 instance.


  • VPC
    • Create a VPC and public subnet
  • EC2
    • Create an EC2 instance inside the public subnet
    • Setup the website in the EC2 instance
    • Access the website via the public IP address of the EC2 instance
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[Spark By Example] SparkSession

The following sample code (by Python and C#) shows how to use SparkSession.


  • SparkSession is an entry point to your spark application since Spark version 2.
  • SparkSession wraps all different contexts (SparkContext, SQLContext, HiveContext, …) to a single entry point.
  • You can create as many SparkSessions as you want.
  • In the Spark shell, such as PySpark shell, the SparkSession object (named as “spark”) is created for you.
  • In the application, you need to create a SparkSession object.
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