[HADOOP-227] Namespace check pointing is not performed until the namenode restarts.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.2.0
• Fix Version/s: 0.11.0
• Assignee: Dhruba Borthakur
• Reporter: Konstantin Shvachko
• Created: 18/May/06 06:39
• Updated: 23/Jun/13 13:55
• Resolved: 26/Jan/07 23:46

Description

In current implementation when the name node starts, it reads its image file, then
the edits file, and then saves the updated image back into the image file.
The image file is never updated after that.
In order to provide the system reliability reliability the namespace information should
be check pointed periodically, and the edits file should be kept relatively small.

Issue Links

• duplicates: HADOOP-334 Redesign the dfs namespace datastructures to be copy on write