[HADOOP-17805] IOStatistisSource to add new adder methods

• Type: Sub-task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.3.1
• Component/s: fs
• Assignee: Unassigned
• Reporter: Steve Loughran
• Created: 15/Jul/21 17:26
• Updated: 15/Jul/21 17:36

Description

Based on experience of Manifest committer of MAPREDUCE-7341:

• operation to take a key and a count and a mean entry, min, max and count:
  addStatsSample(String key, long count)

• operation to add a mean and sample count to a mean value.