[jira] [Updated] (TAJO-602) WorkerResourceManager should be broke down into 3 parts

["Min Zhou (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAJO-602?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Min Zhou updated TAJO-602:
--------------------------

    Assignee: Hyunsik Choi

> WorkerResourceManager  should be broke down into 3 parts
> --------------------------------------------------------
>
>                 Key: TAJO-602
>                 URL: https://issues.apache.org/jira/browse/TAJO-602
>             Project: Tajo
>          Issue Type: Sub-task
>            Reporter: Min Zhou
>            Assignee: Hyunsik Choi
>
> Before implementing a scheduler, I think we should do some refactoring at first. There are 2 interfaces and 4 classes related to resource management, they are WorkerResourceManager , YarnTajoResourceManager, TajoWorkerResourceManager reside in TajoMaster, and ResourceAllocator, YarnResourceAllocator, TajoResourceAllocator reside in QueryMasters.
> WorkerResourceManager actually plays 3 roles
> 1. Choose or start a QueryMaster for a query, and management it
> 2. allocate resource for query tasks / task runners (only for standalone mode)
> 3. Handle worker's heartbeat (only for standalone mode)
> If the scheduler is a decentralized one, like sparrow, we can allocate resource for a QueryMaster as the same way for a TaskRunner.  So 1. and 2. can use the same interface, but called by 2 different caller.    3. is different from the others,  we can create another service, let's say HeartbeatService to deal with worker's heartbeats. 
> Any suggestion?



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