[MAPREDUCE-2365] Add counters for FileInputFormat (BYTES_READ) and FileOutputFormat (BYTES_WRITTEN)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.20.203.0, 0.23.0
• Assignee: Siddharth Seth
• Reporter: Owen O'Malley
• Created: 07/Mar/11 22:19
• Updated: 14/Oct/11 09:01
• Resolved: 13/Jul/11 23:36

Description

MAP_INPUT_BYTES and MAP_OUTPUT_BYTES will be computed using the difference between FileSystem
counters before and after each next(K,V) and collect/write op.

In case compression is being used, these counters will represent the compressed data sizes. The uncompressed size will
not be available.

This is not a direct back-port of 5710. (Counters will be computed in MapTask instead of in individual RecordReaders).

0.20.100 ->
New API -> MAP_INPUT_BYTES will be computed using this method
Old API -> MAP_INPUT_BYTES will remain unchanged.

0.23 ->
New API -> MAP_INPUT_BYTES will be computed using this method
Old API -> MAP_INPUT_BYTES likely to use this method