Re: What is the best way to submit multiple tasks?

Right, you can use SparkContext and SQLContext in multiple threads. They are thread safe. Best Regards, Shixiong Zhu 2015-10-01 4:57 GMT+08:00 : > Hi all, > > I have a process where I do some calculations on each one of the columns > of a dataframe. >

What is the best way to submit multiple tasks?

Hi all, I have a process where I do some calculations on each one of the columns of a dataframe. Intrinsecally, I run across each column with a for loop. On the other hand, each process itself is non-entirely-distributable. To speed up the process, I would like to submit a spark program for