July 2016
Beginner to intermediate
462 pages
9h 14m
English
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Using HDFS
Hadoop Distributed File System (HDFS) is the storage component of the Hadoop framework for Big Data. HDFS is a distributed filesystem, which spreads data on multiple systems, and is inspired by the Google File System used by Google for its search engine. HDFS requires a Java Runtime Environment (JRE), and it uses a NameNode server to keep track of the files. The system also replicates the data so that losing a few nodes doesn't lead to data loss. The typical use case for HDFS is processing large read-only files. Apache Spark, also covered in this chapter, can use HDFS too.
Getting ready
Install Hadoop and a JRE. As these are not Python frameworks, you will have to check what the appropriate procedure is for your operating system. I used ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.