CCA-410 · Question #36
Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?
The correct answer is C. ApplicationMaster. The fundamental idea of MRv2 (YARN) is to split up the two major functionalities of the JobTracker, resource management and job scheduling/monitoring, into separate daemons. The idea is to have a global ResourceManager (RM) and per-application ApplicationMaster (AM). Note…
Question
Which MapReduce v2 (MR2/YARN) daemon is a per-machine slave responsible for launching application containers and monitoring application resources usage?
Options
- AJobTracker
- BResourceManager
- CApplicationMaster
- DNodeManager
- EApplicationMasterService
- FTaskTracker
How the community answered
(47 responses)- A11% (5)
- B2% (1)
- C79% (37)
- D6% (3)
- F2% (1)
Explanation
The fundamental idea of MRv2 (YARN) is to split up the two major functionalities of the JobTracker, resource management and job scheduling/monitoring, into separate daemons. The idea is to have a global ResourceManager (RM) and per-application ApplicationMaster (AM). Note: Let's walk through an application execution sequence :
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