Book Image

HBase Administration Cookbook

By : Yifeng Jiang
Book Image

HBase Administration Cookbook

By: Yifeng Jiang

Overview of this book

As an Open Source distributed big data store, HBase scales to billions of rows, with millions of columns and sits on top of the clusters of commodity machines. If you are looking for a way to store and access a huge amount of data in real-time, then look no further than HBase.HBase Administration Cookbook provides practical examples and simple step-by-step instructions for you to administrate HBase with ease. The recipes cover a wide range of processes for managing a fully distributed, highly available HBase cluster on the cloud. Working with such a huge amount of data means that an organized and manageable process is key and this book will help you to achieve that.The recipes in this practical cookbook start from setting up a fully distributed HBase cluster and moving data into it. You will learn how to use all of the tools for day-to-day administration tasks as well as for efficiently managing and monitoring the cluster to achieve the best performance possible. Understanding the relationship between Hadoop and HBase will allow you to get the best out of HBase so the book will show you how to set up Hadoop clusters, configure Hadoop to cooperate with HBase, and tune its performance.
Table of Contents (16 chapters)
HBase Administration Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface

Configuring block cache for column families


HBase supports block cache to improve read performance. When performing a scan, if block cache is enabled and there is room remaining, data blocks read from StoreFiles on HDFS are cached in region server's Java heap space, so that next time, accessing data in the same block can be served by the cached block. Block cache helps in reducing disk I/O for retrieving data.

Block cache is configurable at table's column family level. Different column families can have different cache priorities or even disable the block cache. Applications leverage this cache mechanism to fit different data sizes and access patterns.

In this recipe, we will describe how to configure block cache for column families and tips to leverage HBase block cache.

Getting ready

Log in to your HBase client node.

How to do it...

The following steps need to be carried out to configure block cache at column family level:

  1. 1. Start HBase Shell:

    $ $HBASE_HOME/bin/hbase shell
    HBase Shell; enter...