apache/spark — pull request #1241 by colorant (2014-06-27 02:19:30+00:00)
Title: [SPARK-2288] Hide ShuffleBlockManager behind ShuffleManager

By Hiding the shuffleblockmanager behind Shufflemanager, we decouple the shuffle data's block mapping management work from Diskblockmananger. This give a more clear interface and more easy for other shuffle manager to implement their own block management logic. the jira ticket have more details.