In this short post you will find out what is the difference between the SET and MULTISET table and why you need to know the difference before creating your table.…
In this post, you will learn what the primary index is (PI), why it is worth determining it, and you will learn about types of PI. You will also read…
In this short post I will show you how you can change the name of the file / files created by Apache Spark to HDFS or simply rename or delete any file.
In this post I will show you how to run the shell command by programming in Scala and how you can use it in Apache Spark.
If you want to save DataFrame as a file on HDFS, there may be a problem that it will be saved as many files. This is the most correct behavior and it results from the parallel work in Apache Spark.
We will use the FileSystem and Path classes from the org.apache.hadoop.fs library to achieve it.
Cloudera is one of the three major players in the market alongside Hortonworks and MapR, which distributes the Hadoop general-interest.
A short tutorial on how to edit the hosts file under Windows system.
Very often you can meet the requirement to create an application that will collect data from an external system through its API. It may turn out that the "bottleneck" of such an application will be the time of its implementation.
Today I will show you how you can use Machine Learning libraries (ML), which are available in Spark as a library under the name Spark MLib.