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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7878) API - expose an unique file identifier
Date Tue, 24 Oct 2017 00:39:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16216140#comment-16216140
] 

Chris Douglas commented on HDFS-7878:
-------------------------------------

The javadoc fails to generate a {{\@link}} to a vararg parameter, both with the ellipsis and
array syntax. Not sure how to fix that. Test failures are due to timeouts and port in use
errors.

This is ready for review, if anyone has cycles for it.

> API - expose an unique file identifier
> --------------------------------------
>
>                 Key: HDFS-7878
>                 URL: https://issues.apache.org/jira/browse/HDFS-7878
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>              Labels: BB2015-05-TBR
>         Attachments: HDFS-7878.01.patch, HDFS-7878.02.patch, HDFS-7878.03.patch, HDFS-7878.04.patch,
HDFS-7878.05.patch, HDFS-7878.06.patch, HDFS-7878.07.patch, HDFS-7878.08.patch, HDFS-7878.09.patch,
HDFS-7878.10.patch, HDFS-7878.11.patch, HDFS-7878.12.patch, HDFS-7878.13.patch, HDFS-7878.14.patch,
HDFS-7878.15.patch, HDFS-7878.16.patch, HDFS-7878.patch
>
>
> See HDFS-487.
> Even though that is resolved as duplicate, the ID is actually not exposed by the JIRA
it supposedly duplicates.
> INode ID for the file should be easy to expose; alternatively ID could be derived from
block IDs, to account for appends...
> This is useful e.g. for cache key by file, to make sure cache stays correct when file
is overwritten.



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