[jira] [Commented] (HDFS-7390) Provide JMX metrics per storage type

[Haohui Mai (JIRA)]

    [ 
https://issues.apache.org/jira/browse/HDFS-7390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14211474#comment-14211474
 ] 

Haohui Mai commented on HDFS-7390:
----------------------------------

For

{code}
  "TieredStorageStats" : 
"{\"ARCHIVE\":{\"capacityTotal\":1498254102528,\"capacityUsed\":12288,\"capacityRemaining\":980102602752,\"blockPoolUsed\":12288,\"nodesInService\":3,\"numBlocks\":0}...
{code}

Can the code output

{code}
  "TieredStorageStats" : 
{"ARCHIVE":{"capacityTotal":1498254102528,"capacityUsed":12288,"capacityRemaining":980102602752,"blockPoolUsed":12288,"nodesInService":3,"numBlocks":0}...
{code}

In the former output {{TieredStorageStats}} maps to a JSON string while in the 
latter one it maps to a JSON object.

> Provide JMX metrics per storage type
> ------------------------------------
>
>                 Key: HDFS-7390
>                 URL: https://issues.apache.org/jira/browse/HDFS-7390
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.5.2
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>         Attachments: HDFS-7390.patch
>
>
> HDFS-2832  added heterogeneous support. In a cluster with different storage 
> types, it is useful to have metrics per storage type. 



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