Use boot from EBS in EC2
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Key: HADOOP-6440
URL: https://issues.apache.org/jira/browse/HADOOP-6440
Project: Hadoop Common
Issue Type: Improvement
Components: contrib/ec2
Reporter: Tom White
Amazon now supports the ability to boot from EBS snapshots
(http://aws.amazon.com/about-aws/whats-new/2009/12/03/amazon-ec2-instances-now-can-boot-from-amazon-ebs/).
We can use this feature to simplify the EBS support in the contrib scripts. The
code that manages the instance/volume mapping can be retired, since EC2 itself
now manages this relationship.
This change would add "stop-cluster" and "start-cluster" commands to stop/start
the instances in a cluster while keeping the EBS volumes attached.
Also, deprecate the "create-storage" and "attach-storage" commands, since both
happen as a part of launch-cluster.
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