EC2 scripts should configure Hadoop to use all available disks on large
instances
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Key: HADOOP-4745
URL: https://issues.apache.org/jira/browse/HADOOP-4745
Project: Hadoop Core
Issue Type: Improvement
Components: contrib/ec2
Affects Versions: 0.19.0
Reporter: Tom White
Assignee: Tom White
Fix For: 0.20.0
The Hadoop configuration on EC2 currently always uses a single disk, even when
more are available
(http://docs.amazonwebservices.com/AWSEC2/2007-08-29/DeveloperGuide/instance-storage.html).
Performance is significantly boosted by using all the available disks, so we
should configure Hadoop to use them automatically.
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