May 2017
Intermediate to advanced
348 pages
7h 8m
English
Content preview from Hadoop 2.x Administration CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Configure shared cache manager
In YARN, whenever a job is submitted, it sets up a distributed cache for jars and configuration files per job. What this means is that the jars will be cached during the execution life cycle of a job. However, often the jars or the code does not change across different users of the cluster.
To solve the problem of loading jars for every job, which consume network bandwidth, a proposal is in place to implement a shared cache across the cluster for all users to use it.
Getting ready
You will need a running cluster with HDFS and YARN set up properly so that the user can run test jobs such as pi or wordcount examples on it.
Note
This feature is not yet production ready and is scheduled to be a standard feature in Hadoop 2.9.0, ...
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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.
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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.