hadoop beginner

I just looked at the online documentation to build a distributed cluster , then to learn how hadoop it ?
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strongly recommended hadoop learning essential classic book :
hadoop Definitive Guide Second Edition
hdfs build a good , you can see its principles, can be familiar with its java interface is written in java program to read the file
Then MAPREDUCE, structures, see its principles , familiar with its interface , write simple java program simple functions such as finding files in characters and their frequency
Then HBASE, see its principles, familiar interfaces , java implementation of the new basic delete tables, insert query to delete records
above three principles can be part of the three reference google cloud computing Bible
GFS, MAPREDUCE, BIGTABLE
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I have built over so you can directly learn Map / Reduce
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API directly Baidu code to learn it ? ?
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curious about
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hadoop support vhd do
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can you send me that way ? zyn-xiao3@163.com