[HDFS-6773] MiniDFSCluster should skip edit log fsync by default

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha, 3.0.0-alpha1
• Fix Version/s: 2.6.0
• Component/s: namenode
• Target Version/s: 2.6.0
• Assignee: Stephen Chu
• Reporter: Daryn Sharp
• Created: 29/Jul/14 21:58
• Updated: 12/May/16 18:13
• Resolved: 27/Aug/14 20:38

Description

The mini cluster is unnecessarily running with durable edit logs. The following change cut runtime of a single test from ~30s to ~10s.

EditLogFileOutputStream.setShouldSkipFsyncForTesting(true);

The mini cluster should default to this behavior after identifying the few edit log tests that probably depend on durable logs.