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hdfs involve extensive disk i/o in its mapreduce process. Therefore if the number of nodes are high, parallelism will be high and query will be efficient. On the other ha ... See More
It depends - if you have partitioning/bucketing defined on tables. And if so how have you used / defined them. The whole idea is (large) that for table join you need to ... See More
Yes Is is.go for Hbase or Cassandra