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https://issues.apache.org/jira/browse/HADOOP-3759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12622096#action_12622096
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Vinod Kumar Vavilapalli commented on HADOOP-3759:
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Review comments:
- TaskTracker's private method findFreeVirtualMemory should be synchronized on
runningTasks.
- Would be good if the resources in TaskTrackerStatus are of the form <String,
Writable> instead of <String, Long>.
Am assuming that the accessor method in JobInProgress is only for future use
inside a scheduler. +1 for addition of the api in MiniMRCluster.
Code looks fine otherwise. Test case too.
> Provide ability to run memory intensive jobs without affecting other running
> tasks on the nodes
> -----------------------------------------------------------------------------------------------
>
> Key: HADOOP-3759
> URL: https://issues.apache.org/jira/browse/HADOOP-3759
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Hemanth Yamijala
> Assignee: Hemanth Yamijala
> Fix For: 0.19.0
>
> Attachments: HADOOP-3759.patch, HADOOP-3759.patch, HADOOP-3759.patch
>
>
> In HADOOP-3581, we are discussing how to prevent memory intensive tasks from
> affecting Hadoop daemons and other tasks running on a node. A related
> requirement is that users be provided an ability to run jobs which are memory
> intensive. The system must provide enough knobs to allow such jobs to be run
> while still maintaining the requirements of HADOOP-3581.
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