how to use multiple TRAIN and TEST phases

[tm]

Hello,

i have a given network and ideally i want to train it in phases. For each phase a different input dataset is used. Also the testing must be done in multiple phases with different validation set each time. So to make it clear the training is going to be like this:

TrainPhase1 -> TestPhase1 -> TrainPhase2 -> TestPhase2 -> .... ->TrainPhase10 -> TestPhase10. How can I get this behavior by modifying the .prototxt files?

Thanks