hadoop-yarn-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jonathan Hung (Jira)" <j...@apache.org>
Subject [jira] [Created] (YARN-9770) Create a queue ordering policy which picks child queues with equal probability
Date Thu, 22 Aug 2019 00:13:00 GMT
Jonathan Hung created YARN-9770:
-----------------------------------

             Summary: Create a queue ordering policy which picks child queues with equal probability
                 Key: YARN-9770
                 URL: https://issues.apache.org/jira/browse/YARN-9770
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Jonathan Hung
            Assignee: Jonathan Hung


Ran some simulations with the default queue_utilization_ordering_policy:

An underutilized queue which receives an application with many (thousands) resource requests
will hog scheduler allocations for a long time (on the order of a minute). In the meantime
apps are getting submitted to all other queues, which increases activeUsers in these queues,
which drops user limit in these queues to small values if minimum-user-limit-percent is configured
to small values (e.g. 10%).

To avoid this issue, we assign to queues with equal probability, to avoid scenarios where
queues don't get allocations for a long time.



--
This message was sent by Atlassian Jira
(v8.3.2#803003)

---------------------------------------------------------------------
To unsubscribe, e-mail: yarn-dev-unsubscribe@hadoop.apache.org
For additional commands, e-mail: yarn-dev-help@hadoop.apache.org


Mime
View raw message