Hello, please help me clear me ideas!

  When a reducer reads map-output data remotely ... Is that reflected in the 
HDFS_BYTES_READ?

  Or is HDFS_BYTES_READ/WRITTEN is only for the start and end of a job ? ie. 
first data read for maps as input and last data written from reducer as output 
for user to see.


Thank you in advance,

Maha

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