Improve configurability of Hadoop EC2 instances
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Key: HADOOP-4117
URL: https://issues.apache.org/jira/browse/HADOOP-4117
Project: Hadoop Core
Issue Type: Improvement
Components: contrib/ec2
Reporter: Tom White
Assignee: Tom White
Fix For: 0.19.0
Currently hadoop-site.xml for EC2 instances is stored as a part of the image
and only a few properties can be controlled from the user scripts (compression,
number of map/reduce tasks). Furthermore, it is not possible to rsync the
configuration around the EC2 cluster with the current image, so the only way to
customize the hadoop-site.xml file is to rebuild the image, which is
time-consuming.
It would be much better to pass the initialization script for nodes at boot
time, so that it is easy to edit the configuration before starting a cluster.
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