What is the MapReduce1 architecture design method?

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MapReduces1 architecture design

Hadoop1.x MR1 (Computing + Resource Job scheduling)

There are two processes, JobTracker and TaskTracker (map task+reduce task), which belong to the master-slave architecture.

JobTracker:

Monitor resources and job scheduling, monitor the health status of all TaskTracker and job through heartbeat

Tell the scheduler to trace the task usage resource usage

TaskTracker:

Responsible for receiving and executing commands sent by JobTracker

Report node resource usage and tasks to JobTracker

TaskScheduler:

Task Scheduler (FIFO principle, first-in, first-out, first-hand execution according to job priority time)

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