I need some materials about analyzing mapreduce sourcecode！

Please recommend me some some materials about analyzing mapreduce sourcecode，book，blogs，paper and so on，all of them are ok! Thanks! -- View this message in context: http://lucene.472066.n3.nabble.com/I-need-some-materials-about-analyzing-mapreduce-sourcecode-tp3742786p3742786.html Sent from the H

please recommend some materials of analyzing mapreduce sourcecode。

I‘m learning mapreduce，Please recommend some materials of analyzing mapreduce sourcecode. Blogs,paper,or books and so on ,all of them are OK! Thanks！ -- View this message in context: http://lucene.472066.n3.nabble.com/please-recommend-some-materials-of-analyzing-mapreduce-sourcecode-tp3652889p365

mapreduce combiner

I have biuld a distribute index using the source code of hadoop/contrib/index，but I found that when the input files become big（such as one file is 16G）,the OOM exception will be throwed .The cause is that: in combiner ,"writer.addIndexNoOptimize()",this use much memory cause to OOM, it's the Lucene