摘要:
Reducer receives (key, values) pairs and aggregate values to a desired format, then write produced (key, value) pairs back into HDFS. E.g. Input: (ter 阅读全文
摘要:
Mapper maps input key/value pairs into intermediate key/value pairs. E.g. Input: (docID, doc) Output: (term, 1) Mapper Class Prototype: Special Data T 阅读全文