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https://issues.apache.org/jira/browse/HADOOP-4117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12631989#action_12631989
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Chris K Wensel commented on HADOOP-4117:
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+1 everything booted up this time. looks great
> Improve configurability of Hadoop EC2 instances
> -----------------------------------------------
>
> 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
>
> Attachments: hadoop-4117-v2.patch, hadoop-4117.patch
>
>
> 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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