Apache Accumulo Hello World Example

This tutorial uses the following Java classes, which can be found in org.apache.accumulo.examples.simple.helloworld in the examples-simple module:

• InsertWithBatchWriter.java - Inserts 10K rows (50K entries) into accumulo with each row having 5 entries
• ReadData.java - Reads all data between two rows

Log into the accumulo shell:

$ ./bin/accumulo shell -u username -p password

Create a table called ‘hellotable’:

username@instance> createtable hellotable

Launch a Java program that inserts data with a BatchWriter:

$ ./bin/accumulo org.apache.accumulo.examples.simple.helloworld.InsertWithBatchWriter -i instance -z zookeepers -u username -p password -t hellotable

On the accumulo status page at the URL below (where ‘master’ is replaced with the name or IP of your accumulo master), you should see 50K entries

http://master:9995/

To view the entries, use the shell to scan the table:

username@instance> table hellotable
username@instance hellotable> scan

You can also use a Java class to scan the table:

$ ./bin/accumulo org.apache.accumulo.examples.simple.helloworld.ReadData -i instance -z zookeepers -u username -p password -t hellotable --startKey row_0 --endKey row_1001