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You're reading from  HBase Administration Cookbook

Product typeBook
Published inAug 2012
PublisherPackt
ISBN-139781849517140
Edition1st Edition
Tools
HadoopHBase
Concepts
Database Administration
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Author (1)
Yifeng Jiang
Yifeng Jiang
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Yifeng Jiang

Yifeng Jiang is a Hadoop and HBase Administrator and Developer at Rakutenthe largest e-commerce company in Japan. After graduating from the University of Science and Technology of China with a B.S. in Information Management Systems, he started his career as a professional software engineer, focusing on Java development. In 2008, he started looking over the Hadoop project. In 2009, he led the development of his previous company's display advertisement data infrastructure using Hadoop and Hive. In 2010, he joined his current employer, where he designed and implemented the Hadoop- and HBase-based, large-scale item ranking system. He is also one of the members of the Hadoop team in the company, which operates several Hadoop/HBase clusters
Read more about Yifeng Jiang

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Handling the "HBase ignores HDFS client configuration" issue

You may have noticed that HBase ignores your HDFS client configuration, for example the dfs.replication setting. In the following example, we have set a replication factor of 2 for our HDFS client: 

$ grep -A 1 "dfs.replication" $HADOOP_HOME/conf/hdfs-site.xml
<name>dfs.replication</name>
<value>2</value>

However, the HBase files on HDFS show a factor of 3, which is the default replication factor of HDFS:

This is not what we expected—the replication factor was expected to be 2, but the actual value is 3.

We will describe why this happens and how to fix it, in this recipe.

Getting ready

Log in to your master node as the user who starts HDFS and HBase. We assume you are using the hadoop user for HDFS and HBase.

How to do it...

The following are the steps to apply your HDFS client configurations to HBase:

  1. 1. Add a symbolic link of the HDFS setting file (hdfs-site.xml) under the HBase configuration directory:

    $ hadoop...
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HBase Administration Cookbook
Published in: Aug 2012Publisher: PacktISBN-13: 9781849517140
© 2012 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Yifeng Jiang

Yifeng Jiang is a Hadoop and HBase Administrator and Developer at Rakutenthe largest e-commerce company in Japan. After graduating from the University of Science and Technology of China with a B.S. in Information Management Systems, he started his career as a professional software engineer, focusing on Java development. In 2008, he started looking over the Hadoop project. In 2009, he led the development of his previous company's display advertisement data infrastructure using Hadoop and Hive. In 2010, he joined his current employer, where he designed and implemented the Hadoop- and HBase-based, large-scale item ranking system. He is also one of the members of the Hadoop team in the company, which operates several Hadoop/HBase clusters
Read more about Yifeng Jiang

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