[MAPREDUCE-1466] FileInputFormat should save #input-files in JobConf

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.21.0
• Component/s: client
• Hadoop Flags: Reviewed
• Release Note: Added a private configuration variable mapreduce.input.num.files, to store number of input files being processed by M/R job.
• Assignee: Luke Lu
• Reporter: Arun Murthy
• Created: 08/Feb/10 19:32
• Updated: 24/Aug/10 21:20
• Resolved: 06/Apr/10 22:43

Description

We already track the amount of data consumed by MR applications (MAP_INPUT_BYTES), alongwith, it would be useful to #input-files from the client-side for analysis. Along the lines of MAPREDUCE-1403, it would be easy to stick in the JobConf during job-submission.