[HBASE-12220] Add hedgedReads and hedgedReadWins metrics

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Hadoop Flags: Reviewed
• Release Note: Adds metrics hedgedReads and hedgedReadWins counts.
• Assignee: Michael Stack
• Reporter: Michael Stack
• Created: 09/Oct/14 19:59
• Updated: 17/Jun/22 17:39
• Resolved: 09/Oct/14 22:04

Description

HDFS-5776 added hedged reads. HBase installs should enable it. This JIRA is about exposing hedged read metrics so they sit by all other hbase metrics. The counts are actually buried and hard to get at in dfsclient.

Issue Links

• is related to: HBASE-24435 Bring back hedged reads metrics to branch-1
• is related to: HBASE-24994 Add hedgedReadOpsInCurThread metric