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https://issues.apache.org/jira/browse/HADOOP-10281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Li updated HADOOP-10281:
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Attachment: subtask4_scheduler.patch
The scheduler assigns schedulables a priority level based the past history of
requests.
It can be configured as follows:
ipc.8020.history-scheduler.history-length = 1000
The number of past requests to remember and compare
ipc.8020.history-scheduler.thresholds = 33, 66
Dependent on the history-length and the number of priority levels: defines the
thresholds that separate each priority level. In this example, we have 3
priority levels and a history length of 100, so we assign thusly:
* Queue 2 if count > 66
* Queue 1 if count > 33
* Queue 0 otherwise
> Create a scheduler, which assigns schedulables a priority level
> ---------------------------------------------------------------
>
> Key: HADOOP-10281
> URL: https://issues.apache.org/jira/browse/HADOOP-10281
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Chris Li
> Attachments: subtask4_scheduler.patch
>
>
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