July 2016
Beginner to intermediate
252 pages
6h 16m
English
Content preview from Architecting HBase Applications
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Chapter 5. Environment Setup
To be able to test locally and see how HBase behaves, we will install and configure a standalone HBase environment that will be used to run the given examples. HBase can run in three modes, each of which offers different behaviors (the first two modes are mainly for testing purposes, while the last one is the mode you will use for your production HBase cluster):
- Standalone mode
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This mode starts all of the HBase processes in a single virtual machine (VM). Standalone mode uses the local disk for HBase storage and does not require any specific configuration. Data will be stored in the current user-configured temporary folder (usually /tmp) in a folder named hbase-$USERNAME. Removing this folder when HBase is down will remove all HBase data. This is the simplest mode for running HBase, and it’s the one we will use for our testing. Using this mode allows the end user to easily clear all HBase content and restart with a blank installation. This mode doesn’t require running any other external service (e.g., ZooKeeper or HDFS).
- Pseudodistributed mode
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In pseudodistributed mode, HBase will run the same processes as in fully distributed mode, but as a single node cluster. HBase will start the ZooKeeper process and both the HBase Master and RegionServer processes.
- Fully distributed mode
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Last, fully distributed mode is when HBase runs on multiple machines with all required services (ZooKeeper, Hadoop, etc.).
System Requirements
Whether you are choosing ...
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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.