Siddharth Seth created HIVE-10406:
-------------------------------------
Summary: LLAP: Make use of additional information to determine
run/preemption order
Key: HIVE-10406
URL: https://issues.apache.org/jira/browse/HIVE-10406
Project: Hive
Issue Type: Sub-task
Reporter: Siddharth Seth
Fix For: llap
The preemption will evolve as it's tested.
Had a discussion offline with [~hagleitn]. The initial policy will likely be
the following.
Within a running DAG, the priority / topo order decides which fragment runs /
is a candidate for preemption.
Beyond this, the number of tasks in the current vertex + upstream vertices will
be used as a measure of the size of the query to determine which fragment gets
to run, if there's multiple fragments queued up. Fragments with a lower count
will be preferred to push through what are expected to be shorter running
queries.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
