Github user jerryshao commented on the pull request:
https://github.com/apache/spark/pull/1009#issuecomment-45430013
Hi Matei, since we already have `ShuffleWriter` and `ShuffleManager`, do we
still need to keep `ShuffleBlockManager`, I think two functionalities of
`ShuffleBlockManager` as getting shuffle writer and managing shuffle block
location can separately move into `HashShuffleWriter` and `HashShuffleManager`
or some others. I think it will be more clear and loose-couple for the shuffle
module and `BlockManager`.
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