spark mlib variance analysis

I have a simple problem: i got mean number of people on one place by hour(time-series like), and now i want to know if the weather condition have impact on the mean number. I would do it with variance analysis like anova in spss or analysing the resultant regression model summary How is it possib

Lambda architecture using Apache Spark

I am implementing the lambda architecture using apache spark for both streaming and batch processing. For real time queries i´m using spark streaming with cassandra and for batch queries i am using spark sql and spark mlib. The problem i ´m facing now is: i need to implemente one serving layer, i.e