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Enabling push-based shuffle in Spark - Spark - [mail # dev]
...Thanks for writing this up. Usually when people talk about push-based shuffle, they are motivating it primarily to reduce the latency of short queries, by pipelining the map phase, shuffle p...
   Author: Reynold Xin , 2020-01-22, 05:23
[DISCUSS] Support year-month and day-time Intervals - Spark - [mail # dev]
...Introducing a new data type has high overhead, both in terms of internal complexity and users' cognitive load. Introducing two data types would have even higher overhead.I looked quickly and...
   Author: Reynold Xin , 2020-01-10, 20:30
[SQL] Is it worth it (and advisable) to implement native UDFs? - Spark - [mail # dev]
...If your UDF itself is very CPU intensive, it probably won't make that much of difference, because the UDF itself will dwarf the serialization/deserialization overhead.If your UDF is cheap, i...
   Author: Reynold Xin , 2020-01-22, 07:21