[HDFS-8480] Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit logs instead of copying them

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 2.6.1, 2.8.0, 2.7.1, 3.0.0-alpha1
• Labels: 2.6.1-candidate
• Target Version/s: 2.7.1
• Assignee: Zhe Zhang
• Reporter: Zhe Zhang
• Created: 26/May/15 23:12
• Updated: 06/Jan/17 00:45
• Resolved: 22/Jun/15 21:47

Description

HDFS-7929 copies existing edit logs to the storage directory of the upgraded NameNode. This slows down the upgrade process. This JIRA aims to use hard-linking instead of per-op copying to achieve the same goal.

Issue Links

• is broken by: HDFS-7929 inotify unable fetch pre-upgrade edit log segments once upgrade starts