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https://issues.apache.org/jira/browse/HADOOP-3930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624884#action_12624884
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Owen O'Malley commented on HADOOP-3930:
---------------------------------------
After thinking about this for a bit, I think a more natural interface for
getSchedulingInfo would be:
{code}
class JobInProgress {
...
Object getSchedulerInfo() { ... }
void setSchedulerInfo(Object info) {...}
{code}
The scheduler can then add its own information directly into the JobInProgress.
Clearly each scheduler would have its own type for scheduler info. The
framework would use the scheduler info's toString() method to generate the
string for the user. Thoughts?
> 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
> Assignee: Sreekanth Ramakrishnan
> 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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