[MAPREDUCE-1816] HAR files used for RAID parity need to have configurable partfile size

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.20.1
• Fix Version/s: 0.22.0
• Component/s: contrib/raid
• Hadoop Flags: Reviewed
• Assignee: Ramkumar Vadali
• Reporter: Ramkumar Vadali
• Created: 26/May/10 06:04
• Updated: 29/Oct/10 02:03
• Resolved: 30/Sep/10 13:23

Description

RAID parity files are merged into HAR archives periodically. This is required to reduce the number of files that the NameNode has to track. The number of files present in a HAR archive depends on the size of HAR part files - higher the size, lower the number of files.
The size of HAR part files is configurable through the setting har.partfile.size, but that is a global setting. This task introduces a new setting specific to raid.har.partfile.size, that is used in-turn to set har.partfile.size