American Heritage® Dictionary of the English Language, Fourth Edition
- n. The astronomical system of Ptolemy, in which the earth is at the center of the universe with the sun, moon, planets, and stars revolving about it in circular orbits.
“JobTracker simply restarts the computation on another TaskTracker/data node that contains the same chunk.”
“A MapReduce job is usually monitored by one JobTracker and one TaskTracker per data node.”
“JobTracker pushes work out to available TaskTracker in the cluster, striving to keep the work as close to the data as possible.”
“Great for authors and writers organizing their thoughts TaskTracker”
“The functional units of a Hadoop cluster -- NameNode, DataNodes, JobTracker, and TaskTracker -- are implemented as daemons.”
“JobTracker is a MapReduce master and TaskTracker is a MapReduce slave.”
“The bin / start-mapred. sh script also consults the conf / slaves file on the JobTracker and starts the TaskTracker daemon on all the listed slaves.”
“In my test setup, I installed NameNode and JobTracker on two separate nodes, and DataNode and TaskTracker both on a third node.”
“On TaskTracker / DataNode you should see Jps, DataNode, and TaskTracker.”
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