[jira] [Created] (TEZ-2442) Support DFS based shuffle in addition to HTTP shuffle

["Kannan Rajah (JIRA)" <ji...@apache.org>]

Kannan Rajah created TEZ-2442:
---------------------------------

             Summary: Support DFS based shuffle in addition to HTTP shuffle
                 Key: TEZ-2442
                 URL: https://issues.apache.org/jira/browse/TEZ-2442
             Project: Apache Tez
          Issue Type: Improvement
    Affects Versions: 0.5.3
            Reporter: Kannan Rajah


In Tez, Shuffle is a mechanism by which intermediate data can be shared between stages. Shuffle data is written to local disk and fetched from any remote node using HTTP. A DFS like MapR file system can support writing this shuffle data directly to its DFS using a notion of local volumes and retrieve it using HDFS API from remote node. The current Shuffle implementation assumes local data can only be managed by LocalFileSystem. So it uses RawLocalFileSystem and LocalDirAllocator. If we can remove this assumption and introduce an abstraction to manage local disks, then we can reuse most of the shuffle logic (store, sort) and inject a HDFS API based retrieval instead of HTTP.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)