NoDurex / datastax-widerow-example

A small example of inserting wide rows into Cassandra with CQL. It also shows asynchronous and batching methods.

Wide Row example

This is a simple example of using the wide row feature in Cassandra. It also shows how to use batching in Cassandra 1.2 and asynchronous requests with the Java driver.

Running the demo

You will need a java runtime (preferably 7) along with maven 3 to run this demo. Start DSE 3.1.X or a cassandra 1.2.X instance on your local machine. This demo just runs as a standalone process on the localhost.

This demo uses quite a lot of memory so it is worth setting the MAVEN_OPTS to run maven with more memory

export MAVEN_OPTS=-Xmx512M

Schema Setup

Note : This will drop the keyspace "datastax_widerow_demo" and create a new one. All existing data will be lost.

To specify contact points use the contactPoints command line parameter e.g. '-DcontactPoints=192.168.25.100,192.168.25.101' The contact points can take mulitple points in the IP,IP,IP (no spaces).

To create the a single node cluster with replication factor of 1 for standard localhost setup, run the following

mvn clean compile exec:java -Dexec.mainClass="com.datastax.demo.SchemaSetupSingle"

To create the a multi data center cluster for DSE with a standard Cassandra, Analytics and Solr set up run the following

mvn clean compile exec:java -Dexec.mainClass="com.datastax.demo.SchemaSetupMulti" 

To run the insert

mvn clean compile exec:java -Dexec.mainClass="com.datastax.widerow.Main"

Or mvn clean compile exec:java -Dexec.mainClass="com.datastax.widerow.Main" -DnoOfRows=10 -DnoOfCols=1000