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https://issues.apache.org/jira/browse/HDFS-15624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17212111#comment-17212111
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huangtianhua commented on HDFS-15624:
-------------------------------------

[~ayushtkn], thanks very much. We will bump up the NamemodeLayoutVertion to -66 
and add validation for related operates with the new storage type nvdimm.

>  Fix the SetQuotaByStorageTypeOp problem after updating hadoop 
> ---------------------------------------------------------------
>
>                 Key: HDFS-15624
>                 URL: https://issues.apache.org/jira/browse/HDFS-15624
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs
>            Reporter: YaYun Wang
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> HDFS-15025 adds a new storage Type NVDIMM, changes the ordinal() of the enum 
> of StorageType. And, setting the quota by storageType depends on the 
> ordinal(), therefore, it may cause the setting of quota to be invalid after 
> upgrade.



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