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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7584) Enable Quota Support for Storage Types (SSD)
Date Sun, 25 Jan 2015 00:24:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14290903#comment-14290903
] 

Zhe Zhang commented on HDFS-7584:
---------------------------------

[~xyao] Will the legacy quota become deprecated after this change? If so we should mention
it in the documentation. Otherwise we should also add some guideline on how to set both legacy
and type-aware quotas. The above example, where the supposedly overall quora is smaller than
aggregate type quotas, isn't so easy to understand.

Otherwise the patch looks good to me. Thanks again for the good work!

> Enable Quota Support for Storage Types (SSD) 
> ---------------------------------------------
>
>                 Key: HDFS-7584
>                 URL: https://issues.apache.org/jira/browse/HDFS-7584
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, namenode
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>         Attachments: HDFS-7584 Quota by Storage Type - 01202015.pdf, HDFS-7584.0.patch,
HDFS-7584.1.patch, HDFS-7584.2.patch, HDFS-7584.3.patch, HDFS-7584.4.patch, editsStored
>
>
> Phase II of the Heterogeneous storage features have completed by HDFS-6584. This JIRA
is opened to enable Quota support of different storage types in terms of storage space usage.
This is more important for certain storage types such as SSD as it is precious and more performant.

> As described in the design doc of HDFS-5682, we plan to add new quotaByStorageType command
and new name node RPC protocol for it. The quota by storage type feature is applied to HDFS
directory level similar to traditional HDFS space quota. 



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