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MapReduce >> mail # user >> Hadoop Avro Question

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Hadoop Avro Question

When dealing with Avro data files in MR jobs ,we use AvroMapper , I noticed
that the output of K and V of AvroMapper isnt writable and neither the key
is comparable (these are AvroKey and AvroValue). As the general
serialization mechanism is writable , how is the K,V pairs in case of avro
, travel across nodes?