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Posted to common-dev@hadoop.apache.org by "Amir Youssefi (JIRA)" <ji...@apache.org> on 2008/09/05 01:35:44 UTC
[jira] Commented: (HADOOP-3973) Breaking out of a task
[ https://issues.apache.org/jira/browse/HADOOP-3973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628520#action_12628520 ]
Amir Youssefi commented on HADOOP-3973:
---------------------------------------
When new interface is committed (HADOOP-1230 issue by Owen) this issue is resolved as well. Meanwhile we have provided workarounds in above discussions. I'm closing the issue.
Custom MapRunnable can address part A (mapper) but not part B (reducer) in above comment:
https://issues.apache.org/jira/browse/HADOOP-3973?focusedCommentId=12623810#action_12623810
BTW, Pig's LIMIT (Top) is at it's pick performance when used with this. In future Pig can break out using coming releases of Hadoop,
> Breaking out of a task
> ----------------------
>
> Key: HADOOP-3973
> URL: https://issues.apache.org/jira/browse/HADOOP-3973
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: Amir Youssefi
>
> Occasionally a mapper/reducer is done without need to see more input data. If we provide a way to break out and skip reading the rest of input then job finishs earlier and resources are spared.
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