Official hadoop Website:
Apache official website http://www.apache.org/Under select hadoop in Apache projects to enter the hadoop official website.
Hadoop Official Website:
Http://hadoop.apache.org/
Hadoop documentation location:
Select "common-> documentation" on the official hadoop website to view the reference documents for hadoop release of the relevant version. When hadoop is released for each version, the reference documents will be released, all versions of documents can be found in the http://hadoop.apache.org/common/docs/, almost all documents are in English, but in 0.18.2 this version has hadoop Chinese documentation, just add "cn" after the English document path http://hadoop.apache.org/common/docs/r0.18.2/ to access, that is, http://hadoop.apache.org/common/docs/r0.18.2/cn/, in 0.18.2 ~ Currently, all versions of hadoop in 0.20.2 use the Chinese version of the document (http://hadoop.apache.org/common/docs/r0.20.2/cn/ is still accessing the 0.18.2 version of the Chinese version of the document ).
Note:
This document describes several important parts, suchHadoop Distributed File System Architecture Design,Hadoop mapreduce tutorial,Build a hadoop cluster. However, for each version of the API, see the English document. The Chinese section only describes the API of version 0.18.2.