archive: 2016/1

Use UDF in Spark DataFrame

It is very convenient to create, register, and use user define functions with data. In addition, the recent release of Apache Spark also supports writing user-defined aggregation functions UDAF. Belo

Happy New Year 2016

It is the end of 2015 and HAPPY NEW YEAR - 2016. It is time to wrap up my writing calendar with some summary on Sparkera, myself, and Big Data ecosystem. In past 2015, I have published 21 articles in