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ProgrammingGuideTaskSetVariable
SSS Mapreduce Programming Guide - TaskSet variable
ja , en TaskSet variableIn SSS Mapreduce, Mappers/Reducers created by same JobEngine can share any objects in remote site. This function is called "TaskSet variable". In TaskSet variable, Context#setTaskSetVariable is available to set any object using string as key. void setTaskSetVariable(java.lang.String key, java.lang.Object v) Context#getTaskSetVariable is available to get the object from the specified key. <T> T getTaskSetVariable(java.lang.String key, java.lang.Class<T> klass) We assume the following usage.
WARNING: Mappers/Reducers can share any object using TaskSet variable, but can share in only same worker server. Mappers/Reducers cannot share any object between worker servers. | |