DATABASE FUNDAMENTALS
BASICS OF BIG DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hadoop YARN
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Hadoop Distributed File System (HDFS)
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Hadoop MapReduce
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Hadoop Common
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Detailed explanation-1: -Apache HDFS is a distributed file system for storing large amounts of data in the area of Big Data and distributing it on different computers. This system enables Apache Hadoop to be run in a distributed manner across a large number of nodes, i.e. computers.
Detailed explanation-2: -The DataNode stores HDFS data in files in its local file system. The DataNode has no knowledge about HDFS files. It stores each block of HDFS data in a separate file in its local file system. The DataNode does not create all files in the same directory.
Detailed explanation-3: -DataNode. The HDFS cluster contains multiple DataNodes. Each DataNode contains multiple data blocks. These data blocks are used to store data.
Detailed explanation-4: -NameNode is the master node in the Apache Hadoop HDFS Architecture that maintains and manages the blocks present on the DataNodes (slave nodes). NameNode is a very highly available server that manages the File System Namespace and controls access to files by clients.