Hello! Suppose this scenario: 1. The DFS block 64MB 2. We populate a SequenceFile with a binary value that has 200MB (that represents a PDF file) In the circumstances of above scenario: 1. How many blocks will be created on HDFS? 2. The number of blocks will be 200MB/64MB aprox 4 blocks? 3. How many task mappers will created? It is the same number as the number of blocks? 4. If 4 mappers will be created, then one mapper will process the single value of the file, and the other three are just created and stopped?
I look forward for your answers. Thank you. Regards, Florin
