Hi Chengwei, If it helps, reading the hadoop tutorial, the configuration files along with API JobHistory* pages would provide you the main details. For eg: http://hadoop.apache.org/common/docs/r0.20.2/api/org/apache/hadoop/mapred/JobHistory.MapAttempt.html http://hadoop.apache.org/common/docs/r0.20.2/api/org/apache/hadoop/mapred/JobHistory.Keys.html
There is a typo on api - http://hadoop.apache.org/common/docs/r0.20.2/api/org/apache/hadoop/mapred/JobHistory "JobHistory.ReduceAttempt <http://hadoop.apache.org/common/docs/r0.20.2/api/org/apache/hadoop/mapred/JobHistory.ReduceAttempt.html> Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node." It should be "Reduce" instead of "Map".Use your judgment. :) Just an example that only code is gospel truth, api/document are guiding force. Thanks & Regards, /Rekha. On 11/12/10 7:57 AM, "Wang, Chengwei" <wan...@gatech.edu> wrote: HI All, I just wonder if there is any doc explaining the terms in the task statistics in the logs/history/ ? For example 'SPLITS', 'MapAttempt'? Thanks a lot for enlightening. Regards Chengwei
