DataFrame abstraction .ee
–DataFrame is split by rows into RDD partitions • Optimized under-the-hood –Logical execution plan optimizations –Physical code generation and deployment optimizations • Can be constructed from a wide array of sources –Structured data files (json, csv, …) –Tables in Hive –Existing Spark RDDs –Python Pandas or R DataFrames –External relational and non-relational databases ... ................
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