apache analytics pig #21

Apache Analytics with Pig

This bundle is a 6 node cluster designed to scale out. Built around Apache
Hadoop components, it contains the following units:

  • 1 NameNode (HDFS)
  • 1 ResourceManager (YARN)
  • 3 Slaves (DataNode and NodeManager)
  • 1 Pig
    • 1 Plugin (colocated on the Pig unit)


This bundle models an Apache Hadoop platform with Apache Pig available for
executing Pig Latin jobs. Deploy using juju-quickstart:

juju quickstart apache-analytics-pig

See juju quickstart --help for deployment options, including machine
constraints and how to deploy a locally modified version of bundle.yaml.

Once deployment is complete, you can run Pig in two different modes:

Local Mode

Run Pig in local mode on the Pig unit with the following:

juju ssh pig/0
pig -x local

MapReduce Mode

MapReduce mode is the default for Pig. To run in this mode, ssh to the Pig unit
and run pig as follows:

juju ssh pig/0

Status and Smoke Test

The services provide extended status reporting to indicate when they are ready:

juju status --format=tabular

This is particularly useful when combined with watch to track the on-going
progress of the deployment:

watch -n 0.5 juju status --format=tabular

The charm for each core component (namenode, resourcemanager, pig)
also each provide a smoke-test action that can be used to verify that each
component is functioning as expected. You can run them all and then watch the
action status list:

juju action do namenode/0 smoke-test
juju action do resourcemanager/0 smoke-test
juju action do pig/0 smoke-test
watch -n 0.5 juju action status

Eventually, all of the actions should settle to status: completed. If
any go instead to status: failed then it means that component is not working
as expected. You can get more information about that component's smoke test:

juju action fetch <action-id>

Scale Out Usage

This bundle was designed to scale out. To increase the amount of Compute
Slaves, you can add units to the compute-slave service. To add one unit:

juju add-unit compute-slave

Or you can add multiple units at once:

juju add-unit -n4 compute-slave

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