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The Dataframe API was released as an abstraction on top of the RDD, followed by the Dataset API. In Spark 1.x, the RDD was the primary application programming interface (API), but as of Spark 2.x use of the Dataset API is encouraged [3] even though the RDD API is not deprecated. [4] [5] The RDD technology still underlies the Dataset API. [6] [7]
In analogy with relational databases, a column family is as a "table", each key-value pair being a "row". Each column is a tuple consisting of a column name, a value, and a timestamp. In a relational database table, this data would be grouped together within a table with other non-related data. Two types of column families exist:
The transfer encodings the user agent is willing to accept: the same values as for the response header field Transfer-Encoding can be used, plus the "trailers" value (related to the "chunked" transfer method) to notify the server it expects to receive additional fields in the trailer after the last, zero-sized, chunk.
Sales rose this year during the holiday shopping season even as Americans wrestled with elevated prices for many groceries and other necessities, according to new data. Holiday sales from the ...
In a numbered list in a large font, some browsers do not show more than two digits (2 spaces width) of indentation, unless extra indentation is applied (if there are multiple columns: for each column). This is fixed by increasing the default indentation of 3.2em by 2em more, and it can be done in multiple ways:
By Andy Sullivan. WASHINGTON - President-elect Donald Trump has said he might install his picks for top administration posts without first winning approval in the U.S. Senate.
Walmart and Branch Messenger, a payments platform, accused of deceiving workers about pay from retailer for two years.
Title Platform Notes 1st Word/1st Word Plus: Atari ST and Acorn: AM Jacquard Systems: running Type-Rite, its own proprietary software [1]: Adobe Buzzword: Adobe PageMaker