CCA-500 Question #26: Real Exam Question with Answer & Explanation

The correct answer is C. They may be formatted in any Linux file system. Hadoop Operations: Choosing a Filesystem Today Hadoop primarily runs on Linux: as a result we'll focus on common Linux filesystems. To be sure, Hadoop can run on more exotic filesystems such as those from commercial vendors, but this usually isn't cost-effective. Remember that Ha

Question

You are configuring a server running HDFS, MapReduce version 2 (MRv2) on YARN running Linux. How must you format underlying file system of each DataNode?

Options

AThey must be formatted as HDFS
BThey must be formatted as either ext3 or ext4
CThey may be formatted in any Linux file system
DThey must not be formatted - - HDFS will format the file system automatically

Explanation

Hadoop Operations: Choosing a Filesystem Today Hadoop primarily runs on Linux: as a result we'll focus on common Linux filesystems. To be sure, Hadoop can run on more exotic filesystems such as those from commercial vendors, but this usually isn't cost-effective. Remember that Hadoop is designed to be not only low-cost, but also modest in its requirements on the hosts on which it runs. By far, the most common filesystems used in production clusters are ext3, ext4, and xfs.

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