November 2014
Beginner to intermediate
326 pages
7h 4m
English
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Optimizing ZooKeeper
As mentioned in Chapter 1, Understanding the HBase Ecosystem, ZooKeeper provides distributed synchronization and group service to HBase. It is one of the necessities of HBase, and hence, we have to optimize it. Use the following setting for optimization:
<property> <name>zookeeper.session.timeout</name> <value>3000</value> </property>
The default value for this setting is 3 minutes. This decides how often master should check for server crashes. We can decrease it so that the server crashes can be noticed quickly, but if this value decreases, we need to take care of GC. In the case of full GC, the server might not respond while running fine, and it might be reported as crashed. This configuration can be overridden in the hbase-site.xml ...
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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.