August 2015
Intermediate to advanced
278 pages
5h 54m
English
Content preview from Learning YARNBecome 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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Understanding ResourceManager's High Availability
The ResourceManager is a per-cluster service in a YARN cluster. It manages the cluster resources and schedules the applications on the basis of resource availability. What if this one service goes down or the node running the services gets out of the network? The whole cluster would become unusable, as the only point of contact for the clients is unavailable. Also, the running applications would not be able to acquire the cluster resources for task execution or status updates.
The ResourceManager service is considered to be the single point of failure in a cluster. In Hadoop 2.4.1, this issue is resolved and the High Availability feature of the ResourceManager service is introduced in YARN.
Architecture ...
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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.