[MAPREDUCE-2722] Gridmix simulated job's map's hdfsBytesRead counter is wrong when compressed input is used

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1.0-beta
• Component/s: contrib/gridmix
• Hadoop Flags: Reviewed
• Release Note: Makes Gridmix use the uncompressed input data size while simulating map tasks in the case where compressed input data was used in original job.
• Assignee: Ravi Gummadi
• Reporter: Ravi Gummadi
• Created: 22/Jul/11 11:25
• Updated: 03/Sep/14 22:45
• Resolved: 05/Mar/12 13:45

Description

When compressed input was used by original job's map task, then the simulated job's map task's hdfsBytesRead counter is wrong if compression emulation is enabled. This issue is because hdfsBytesRead of map task of original job is considered as uncompressed map input size by Gridmix.