--- title: "Saradha Ragunathan (@SR) | Hashnode" description: "Saradha Ragunathan (@SR) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@SR" --- @SR # Saradha Ragunathan @SR · Joined August 2022 ### [Common source file formats used with Apache Spark](https://saradha.hashnode.dev/common-source-file-formats-used-with-apache-spark?utm_source=hashnode&utm_medium=feed) Lets understand some of the most commonly used file formats with Apache Spark Parquet - Parquet is a columnar format that is supported by many other data processing systems. Spark SQL provides support for both reading and writing Parquet files that... 2 min read · [saradha.hashnode.dev](https://saradha.hashnode.dev/common-source-file-formats-used-with-apache-spark?utm_source=hashnode&utm_medium=feed) [Aug 6, 2022](https://hashnode.com/posts/common-source-file-formats-used-with-apache-spark/62eef61ee3a3793580e017cc) ### [Apache Spark Optimization techniques](https://saradha.hashnode.dev/apache-spark-optimization-techniques?utm_source=hashnode&utm_medium=feed) Apache Spark is one of the most popular cluster computing frameworks for big data processing. However, running complex spark jobs that execute efficiently requires a good understanding of how spark works and various ways to optimise the jobs for bett... 3 min read · [saradha.hashnode.dev](https://saradha.hashnode.dev/apache-spark-optimization-techniques?utm_source=hashnode&utm_medium=feed) [Aug 6, 2022](https://hashnode.com/posts/apache-spark-optimization-techniques/62eeee4cba649046e8d8e580) ### [Spark Partitioning and Bucketing](https://saradha.hashnode.dev/spark-partitioning-and-bucketing?utm_source=hashnode&utm_medium=feed) Partitioning Partitioning is a way to split the data into multiple partitions so that you can execute transformations on multiple partitions in parallel which allows completing the job faster. You can also write partitioned data into a file system (m... 2 min read · [saradha.hashnode.dev](https://saradha.hashnode.dev/spark-partitioning-and-bucketing?utm_source=hashnode&utm_medium=feed) [Aug 6, 2022](https://hashnode.com/posts/spark-partitioning-and-bucketing/62ee9753ba649046e8d8da01) ### [Spark Map and FlatMap Usages](https://saradha.hashnode.dev/spark-map-and-flatmap-usages?utm_source=hashnode&utm_medium=feed) Apache Spark supports various transformation techniques. In this blog, we will learn about the Apache Spark Map and FlatMap Operation and Comparison between these two transformation methods. Apache Spark Map and FlatMap Operation Both map and flatMa... 2 min read · [saradha.hashnode.dev](https://saradha.hashnode.dev/spark-map-and-flatmap-usages?utm_source=hashnode&utm_medium=feed) [Aug 6, 2022](https://hashnode.com/posts/spark-map-and-flatmap-usages/62ee844bba649046e8d8d6cd)