  The ability to train large-scale neural networks has resulted in
state-of-the-art performance in many areas of computer vision. These results
have largely come from computational break throughs of two forms: model
parallelism, e.g. GPU accelerated training, which has seen quick adoption in
computer vision circles, and data parallelism, e.g. A-SGD, whose large scale
has been used mostly in industry. We report early experiments with a system
that makes use of both model parallelism and data parallelism, we call GPU
A-SGD. We show using GPU A-SGD it is possible to speed up training of large
convolutional neural networks useful for computer vision. We believe GPU A-SGD
will make it possible to train larger networks on larger training sets in a
reasonable amount of time.
