[MAPREDUCE-326] The lowest level map-reduce APIs should be byte oriented

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Eric Baldeschwieler
• Created: 14/Dec/07 17:03
• Updated: 16/Feb/10 21:36

Description

As discussed here:
https://issues.apache.org/jira/browse/HADOOP-1986#action_12551237

The templates, serializers and other complexities that allow map-reduce to use arbitrary types complicate the design and lead to lots of object creates and other overhead that a byte oriented design would not suffer. I believe the lowest level implementation of hadoop map-reduce should have byte string oriented APIs (for keys and values). This API would be more performant, simpler and more easily cross language.

The existing API could be maintained as a thin layer on top of the leaner API.

Issue Links

• incorporates: MAPREDUCE-1452 Add a low-level MapReduce API