Ye Yin

Stop ps server gracefully is a requirement when run distributed training with [kubernetes batch job](https://kubernetes.io/docs/user-guide/jobs/). Anyone can write a detail demo base on [mnist_replica](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/dist_test/python/mnist_replica.py)?

I write a demo for MNIST_data, and it seems run OK. See [dist_fifo](https://github.com/hustcat/tensorflow_examples/blob/master/mnist_distributed/dist_fifo.py).

1.11.0-dev with experiment: ``` sh #docker --version Docker version 1.11.0-dev, build 901c67a-unsupported, experimental ```

@sanimej yea,`10.254.0.10` is the external DNS, and embedded DNS server has forwarded the query. But this make DNS query become inefficiency and slowly. I think disable it is better for...

https://github.com/containers/image is a powerful library, it's great if move it under OCI.

I think we could setup a library with some defined APIs(or interface). ｀container/image` or other tools can implement these APIs. These [Interfaces](https://github.com/containers/image/blob/master/types/types.go) in `contaiener/image` are good examples. #2

[oci-torrent](https://github.com/hustcat/oci-torrent): A tool to distribute OCI image with bittorrent

Great job! IMO, we should add `List` API to return all digests for `Engine interface`, such as: ``` // List Return all digests List(ctx context.Context) (digests []string, err error) ```...

And more, I'd like to add `Exist` API: ``` // Exist Return true if digest is exist, else return false Exist(ctx context.Context, digest string) (bool, error) ```

> Is this for “I want to put this blob, whose hash I already know, but > don't want to bother if that blob is already in storage”? Maybe in...