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From "Ewan Higgs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6708) StorageType should be encoded in the block token
Date Fri, 14 Apr 2017 09:33:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15968837#comment-15968837
] 

Ewan Higgs commented on HDFS-6708:
----------------------------------

If I understand correctly, the storageType being implemented using varargs lets us omit the
storageTypes parameter because it's the last parameter. However 9807 adds the StorageID which
will then be the last parameter so will this approach be able to be extended?

> StorageType should be encoded in the block token
> ------------------------------------------------
>
>                 Key: HDFS-6708
>                 URL: https://issues.apache.org/jira/browse/HDFS-6708
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>    Affects Versions: 2.4.1
>            Reporter: Arpit Agarwal
>            Assignee: Ewan Higgs
>             Fix For: 3.0.0-alpha3
>
>         Attachments: HDFS-6708.0001.patch, HDFS-6708.0002.patch, HDFS-6708.0003.patch,
HDFS-6708.0004.patch, HDFS-6708.0005.patch, HDFS-6708.0006.patch, HDFS-6708.0007.patch, HDFS-6708.0008.patch,
HDFS-6708.0009.patch
>
>
> HDFS-6702 is adding support for file creation based on StorageType.
> The block token is used as a tamper-proof channel for communicating block parameters
from the NN to the DN during block creation. The StorageType should be included in this block
token.



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