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https://issues.apache.org/jira/browse/MAPREDUCE-817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sharad Agarwal updated MAPREDUCE-817:
-------------------------------------
Release Note: Provides a way to configure the cache of JobStatus objects
for the retired jobs. Adds an API in RunningJob to access history file url.
Adds a LRU based cache for job history files loaded in memory when accessed via
JobTracker web UI. (was: Provides a way to configure the cache of JobStatus
objects for the retired jobs. Adds an API in RunningJob to access history file
url.)
> Add a cache for retired jobs with minimal job info and provide a way to
> access history file url
> -----------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-817
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-817
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: client, jobtracker
> Reporter: Sharad Agarwal
> Assignee: Sharad Agarwal
> Fix For: 0.21.0
>
> Attachments: 817_v1.patch, 817_v2.patch, 817_v3.patch,
> 817_ydist.patch, 817_ydist_new.patch, 817_ydist_new_1.patch
>
>
> MAPREDUCE-814 will provide a way to keep the job history files in HDFS. There
> should be a way to get the url for the completed job history fie. The
> completed jobs can be purged from memory more aggressively from jobtracker
> since the clients can retrieve the information from history file. Jobtracker
> can just maintain the very basic info about the completed jobs.
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