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HBase Administration Cookbook
book

HBase Administration Cookbook

by Yifeng Jiang
August 2012
Intermediate to advanced content levelIntermediate to advanced
332 pages
7h 3m
English
Packt Publishing
Content preview from HBase Administration Cookbook

Backing up NameNode metadata

As HBase runs within HDFS, in addition to taking care of the HBase cluster, it is also important to keep your HDFS running on a healthy status. NameNode is the most important component in an HDFS cluster. A NameNode crash makes the entire HDFS cluster inaccessible. The metadata of an HDFS cluster, including the filesystem image and edit log, is managed by NameNode.

We need to protect our NameNode metadata for two situations:

  • Metadata lost in the event of a crash
  • Metadata corruption by any reason

For the first situation, we can set up NameNode to write its metadata to its local disk, along with an NFS mount. As described in the Setting up multiple, highly available (HA) masters recipe, in Chapter 1, Setting Up HBase Cluster ...

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Publisher Resources

ISBN: 9781849517140Other