Apache Spark is a fast and general-purpose cluster computing system. Spark supports in-memory processing for parallel computation which is why it is pretty much faster than a Map-Reduce process. It supports a rich set of tools like Spark SQL Read more
Cloudera Impala provides an interface for executing SQL queries on data(Big Data) stored in HDFS or HBase in a fast and interactive way. Impala improves the performance of an SQL query by applying various optimization techniques. “Compute Stats” is one Read more
Sometimes, we come across a situation where we may need to update the last modified time of a file in HDFS. We can achieve it using Hadoop FileSystem API in Java. Step 1: Create a simple maven project in Eclipse. Read more