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The "PseudoDistributedHadoop" page has been changed by SteveLoughran: http://wiki.apache.org/hadoop/PseudoDistributedHadoop?action=diff&rev1=3&rev2=4 == Ports in Use == + These are the standard ports; if the configuration files are changed then they will not be valid. + * NameNode: [[http://localhost:50070/dfshealth.jsp]] * HDFS filesystem browser [[http://localhost:50075/browseDirectory.jsp?namenodeInfoPort=50070&dir=/]] * Server logs [[http://localhost:50070/logs/]] * JobTracker: [[http://localhost:50030/jobtracker.jsp]] + * TaskTracker: [[http://localhost:50060/tasktracker.jsp]] + + == Recommended Configuration Parameters for Pseudo-Distributed Hadoop == + + With only a single HDFS datanode, the replication factor should be set to 1 the same goes for the replication factor of submitted + jars. You also need to tell the Job tracker to not try handing a failing task to another task tracker, or to blacklist a tracker that + appears to fail a lot. While those options are essential in large clusters with many machines -some of which will start to fail, on + a single node cluster they do more harm than good. + {{{ + mapred.submit.replication=1 + mapred.skip.attempts.to.start.skipping=1 + mapred.max.tracker.failures=10000 + mapred.max.tracker.blacklists=10000 + mapred.map.tasks.speculative.execution=false + mapred.reduce.tasks.speculative.execution=false + tasktracker.http.threads=5 + }}} +
