[HDFS-15155] writeIoRate of DataNodeVolumeMetrics is never used

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.3.0
• Component/s: hdfs
• Hadoop Flags: Reviewed
• Assignee: Haibin Huang
• Reporter: Haibin Huang
• Created: 06/Feb/20 12:28
• Updated: 13/Mar/20 16:06
• Resolved: 13/Mar/20 15:45

Description

There is some incorrect object using in DataNodeVolumeMetrics, writeIoRate is never used and syncIoRate should be replaced by writeIoRate in the following code:

// Based on writeIoRate
public long getWriteIoSampleCount() {
  return syncIoRate.lastStat().numSamples();
}

public double getWriteIoMean() {
  return syncIoRate.lastStat().mean();
}

public double getWriteIoStdDev() {
  return syncIoRate.lastStat().stddev();
}