Hadoop InputFormat for Cassandra. Works with Hadoop-0.21+ and Cassandra 2.x.
Features beyond those supported in the standard InputFormat (at least when I started working on this!):
- Works with Hadoop 2
- Supports combining results from multiple queries over multiple tables (this works as long as the different tables have the same primary key)
- Supports grouping together Rows based on their partition key and an optional subset of clustering columns
To use:
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Download and install this Maven Cassandra plugin: https://github.com/wibiclint/simple-cassandra-maven-plugin
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Build and install into your local Maven repo:
mvn clean install -
Include as a dependency in the POM for your project:
<dependency> <groupId>com.github.cassandra2-hadoop2</groupId> <artifactId>cassandra2-hadoop2</artifactId> <version>0.1-SNAPSHOT</version> </dependency>
Based originally on work from michaelsembwever, which stems from Dave Brosius's work in CASSANDRA-5201.