[jira] [Updated] (DRILL-4136) Enhance queue support to take query cost & available cluster resources into account

["Hanifi Gunes (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-4136?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hanifi Gunes updated DRILL-4136:
--------------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: DRILL-4186

> Enhance queue support to take query cost & available cluster resources into account
> -----------------------------------------------------------------------------------
>
>                 Key: DRILL-4136
>                 URL: https://issues.apache.org/jira/browse/DRILL-4136
>             Project: Apache Drill
>          Issue Type: Sub-task
>          Components: Execution - Flow
>    Affects Versions: 1.3.0
>            Reporter: Hanifi Gunes
>            Assignee: Hanifi Gunes
>
> Current queue support relies on a distributed semaphore around a fix pre-defined number. This semaphore indicates the number of queries Drill can run concurrently. Presently, we define small and large queues where we classify queries based on a threshold and use two semaphores around small and large queues individually. 
> This issue proposes to come up with an enhanced queueing or query dispatch mechanism where a query is granted execution based on its cost and availability of system resources(cpu, io, memory etc). Enhancing cost planing and introducing a distributed resource management should be addressed later to fully benefit from this enhancement. The proposal is a non-blocking and asynchronous mechanism that assumes eventual consistency around available system resources.



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