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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3930) Decide how to integrate scheduler info into CLI and job tracker web page
Date Tue, 19 Aug 2008 08:11:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12623595#action_12623595
] 

dhruba borthakur commented on HADOOP-3930:
------------------------------------------

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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