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https://issues.apache.org/jira/browse/HADOOP-3930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623595#action_12623595
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dhruba borthakur commented on HADOOP-3930:
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The jobs-page is actually useful to users who have submitted jobs. The
scheduler information is typically important for cluster administrators. Does
it make sense to make the scheduler information show up as a separate page
rather than the same page that lists all user's jobs? Of course, power users
might want to see scheduling information sometime.
> Decide how to integrate scheduler info into CLI and job tracker web page
> ------------------------------------------------------------------------
>
> Key: HADOOP-3930
> URL: https://issues.apache.org/jira/browse/HADOOP-3930
> Project: Hadoop Core
> Issue Type: Improvement
> Affects Versions: 0.17.2
> Reporter: Matei Zaharia
> Priority: Minor
> Attachments: 3930-1.patch, mockup.JPG
>
>
> We need a way for job schedulers such as HADOOP-3445 and HADOOP-3476 to
> provide info to display on the JobTracker web interface and in the CLI. The
> main things needed seem to be:
> * A way for schedulers to provide info to show in a column on the web UI and
> in the CLI - something as simple as a single string, or a map<string, int>
> for multiple parameters.
> * Some sorting order for jobs - maybe a method to sort a list of jobs.
> Let's figure out what the best way to do this is and implement it in the
> existing schedulers.
> My first-order proposal at an API: Augment the TaskScheduler with
> * public Map<String, String> getSchedulingInfo(JobInProgress job) -- returns
> key-value pairs which are displayed in columns on the web UI or the CLI for
> the list of jobs.
> * public Map<String, String> getSchedulingInfo(String queue) -- returns
> key-value pairs which are displayed in columns on the web UI or the CLI for
> the list of queues.
> * public Collection<JobInProgress> getJobs(String queueName) -- returns the
> list of jobs in a given queue, sorted by a scheduler-specific order (the
> order it wants to run them in / schedule the next task in / etc).
> * public List<String> getQueues();
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