tree fed86db70e8db2cabe70fc607adc927ed803c2fe
parent 8ac499643475f8da3b40657ec6efcd6c200c51b7
author Yang Chen <yangchen@google.com> 1631567061 -0700
committer TensorFlower Gardener <gardener@tensorflow.org> 1631567328 -0700

[tf.data service] Comment why auto-sharding does not use num_replicas.

This parameter is used internally by experimental_distribute_dataset to
rebatch the dataset:

https://github.com/tensorflow/tensorflow/blob/919f693420e35d00c8d0a42100837ae3718f7927/tensorflow/python/distribute/input_lib.py#L1246-L1250
https://github.com/tensorflow/tensorflow/blob/919f693420e35d00c8d0a42100837ae3718f7927/tensorflow/core/grappler/optimizers/data/auto_shard.cc#L577-L595

`rebatch` is not called outside `experimental_distribute_dataset`, so
the parameter is unused here.

PiperOrigin-RevId: 396437959
Change-Id: Ib4bb7443db002e09c38992b61fb666dd8bef2a7b