[HDFS-10999] Introduce separate stats for Replicated and Erasure Coded Blocks apart from the current Aggregated stats

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha4
• Component/s: erasure-coding
• Labels: hdfs-ec-3.0-nice-to-have supportability
• Assignee: Manoj Govindassamy
• Reporter: Wei-Chiu Chuang
• Created: 11/Oct/16 23:54
• Updated: 02/Oct/19 17:15
• Resolved: 14/Jun/17 17:46

Description

Per HDFS-9857, it seems in the Hadoop 3 world, people prefer the more generic term "low redundancy" to the old-fashioned "under replicated". But this term is still being used in messages in several places, such as web ui, dfsadmin and fsck. We should probably change them to avoid confusion.

File this jira to discuss it.

Issue Links

• breaks: HDFS-13048 LowRedundancyReplicatedBlocks metric can be negative
• is duplicated by: HDFS-8672 Erasure Coding: Add EC-related Metrics to NN (seperate striped blocks count from UnderReplicatedBlocks count)
• is related to: HDFS-12206 Rename the split EC / replicated block metrics
• relates to: HDFS-8196 Post enabled Erasure Coding Policies on NameNode UI
• relates to: HDFS-12573 Divide the total block metrics into replica and ec