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courses:mapreduce-tutorial:step-29 [2012/01/29 17:40]
straka 		courses:mapreduce-tutorial:step-29 [2012/01/29 17:42]
straka
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 We start by creating ''FileAsPathInputFormat'', which reads any file, splits it and for each split return exactly one input pair (file_path, start-length) with types (''Text'', ''Text''), where ''file_path'' is path to the file and ''start-length'' is a string containing two dash-separated numbers: start offset of the split and length of the split. We start by creating ''FileAsPathInputFormat'', which reads any file, splits it and for each split return exactly one input pair (file_path, start-length) with types (''Text'', ''Text''), where ''file_path'' is path to the file and ''start-length'' is a string containing two dash-separated numbers: start offset of the split and length of the split.
  
 +When implementing new input format, we must
 +  * decide whether the input files are splittable. Usually uncompressed are splittable and compressed are not splittable, with the exception of ''SequenceFile'', which is always splittable.
 +  * implement
 When  When 
  

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