[HDFS-9674] The HTrace span for OpWriteBlock should record the maxWriteToDisk time

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.9.0, 3.0.0-alpha1
• Component/s: datanode, tracing
• Target Version/s: 2.9.0
• Hadoop Flags: Reviewed
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 21/Jan/16 03:05
• Updated: 30/Aug/16 01:20
• Resolved: 21/Jan/16 21:27

Description

The HTrace span for OpWriteBlock should record the maxWriteToDisk time. That way, if the trace span is long, we can figure out whether it is because of a hard disk or I/O issue, or something else.