```txt master MASTERURL --> 运行模式 例：spark://host:port, mesos://host:port, yarn, or local.

PROCESSLOCAL data is in the same JVM as the running code. This is the best locality possible NODELOCAL data is on the same node. Examples might be in...

Vanilla gradient descent, aka batch gradient descent, computes the gradient of the cost function w.r.t. to the parameters θ