why solver.prototxt is divided into solver_train.prototxt and solver_test.prototxt?

[ujsyehao]

I am confused about solver_train.prototxt and solver_test.prototxt.

• different base_lr set, lr=0.0001 in solver_train.prototxt and lr=0.001 in solver_test.prototxt
• different gamma set, gamma=0.5 in solver_train.prototxt and gamma=0.1 in solver_test.prototxt
• no weight decay in solver_train.prototxt, weight_decay=0.0005 in solver_test.prototxt
• different stepvalue set in solver_train.prototxt and solver_test.prototxt
• different optimization method, RMSProp method in solver_train.prototxt, SGD method in solver_test.prototxt