Pascal GILLET created SPARK-23499:
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Summary: Mesos Cluster Dispatcher should support priority queues
to submit drivers
Key: SPARK-23499
URL: https://issues.apache.org/jira/browse/SPARK-23499
Project: Spark
Issue Type: Improvement
Components: Mesos
Affects Versions: 2.2.1, 2.2.2, 2.3.0, 2.3.1, 2.4.0
Reporter: Pascal GILLET
Fix For: 2.4.0
As for Yarn, Mesos users should be able to specify priority queues to define a
workload management policy for queued drivers in the Mesos Cluster Dispatcher.
Submitted drivers are *currently* kept in order of their submission: the first
driver added to the queue will be the first one to be executed (FIFO).
Each driver could have a "priority" associated with it. A driver with high
priority is served (Mesos resources) before a driver with low priority. If two
drivers have the same priority, they are served according to their submit date
in the queue.
To set up such priority queues, the following changes are proposed:
* The Mesos Cluster Dispatcher can optionally be configured with the
_spark.mesos.dispatcher.queue.[QueueName]_ property. This property takes a
float as value. This adds a new queue named _QueueName_ for submitted drivers
with the specified priority.
Higher numbers indicate higher priority.
The user can then specify multiple queues.
* A driver can be submitted to a specific queue with
_spark.mesos.dispatcher.queue_. This property takes the name of a queue
previously declared in the dispatcher as value.
By default, the dispatcher has a single "default" queue with 0.0 priority
(cannot be overridden). If none of the properties above are specified, the
behavior is the same as the current one (i.e. simple FIFO).
Additionaly, it is possible to implement a consistent and overall workload
management policy throughout the lifecycle of drivers by mapping these priority
queues to weighted Mesos roles if any (i.e. from the QUEUED state in the
dispatcher to the final states in the Mesos cluster), and by specifying a
spark.mesos.role along with a spark.mesos.dispatcher.queue when submitting an
application.
For example, with the URGENT Mesos role:
# Conf on the dispatcher side
spark.mesos.dispatcher.queue.URGENT=1.0
# Conf on the driver side
spark.mesos.dispatcher.queue=URGENT
spark.mesos.role=URGENT
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