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Date: Tue, 18 Oct 2016 01:41:58 +0000 (UTC)
From: "Rui Gao (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12840732.1435291045000.12297.1476754918539@Atlassian.JIRA>
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References: <JIRA.12840732.1435291045000@Atlassian.JIRA> <JIRA.12840732.1435291045898@arcas>
Subject: [jira] [Commented] (HDFS-8672) Erasure Coding: Add EC-related
 Metrics to NN (seperate striped blocks count from UnderReplicatedBlocks
 count)
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archived-at: Tue, 18 Oct 2016 01:42:00 -0000


    [ https://issues.apache.org/jira/browse/HDFS-8672?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15584097#comment-15584097 ] 

Rui Gao commented on HDFS-8672:
-------------------------------

Hi [~andrew.wang], I agree with you. Separating  recovery-related metrics of EC would be very helpful for monitoring. 

Also, I think it's better to keep name consistency among configuration parameter, variable name and metric name as mentioned in HDFS-10999 .

> Erasure Coding: Add EC-related Metrics to NN (seperate striped blocks count from UnderReplicatedBlocks count)
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8672
>                 URL: https://issues.apache.org/jira/browse/HDFS-8672
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Walter Su
>            Assignee: Walter Su
>            Priority: Minor
>
> 1. {{MissingBlocks}} metric is updated in HDFS-8461 so it includes striped blocks.
> 2. {{CorruptBlocks}} metric is updated in HDFS-8619 so it includes striped blocks.
> 3. {{UnderReplicatedBlocks}} and {{PendingReplicationBlocks}} includes striped blocks (HDFS-7912).
> This jira aims to seperate striped blocks count from {{UnderReplicatedBlocks}} count.
> EC file recovery need coding. It's more expensive than block duplication.
> It's necessary to seperate striped blocks count from UnderReplicatedBlocks count. So user can know what's going on.


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