This HDFS tutorial designed to be an all in one package to answer all your questions about hadoop Component.
Hadoop is an open source software developed by the Apache Software Foundation (ASF). You can download Hadoop directly from the project website at http://hadoop.apache.org. Cloudera is a company that provides support, consulting, and management tools for Hadoop. Cloudera also has a distribution of software called Cloudera’s Distribution Including Apache Hadoop (CDH). Here in this article , These parts make up the central part of the Hadoop ecosystem, offering a fault-tolerant and scalable large data processing and storing platform. More features and higher-level abstractions are offered by Hive, Pig, and Spark, among other Hadoop ecosystem projects and tools, for various use cases.