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From "Sean Mackrory (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7878) API - expose an unique file identifier
Date Tue, 26 Sep 2017 23:02:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16181721#comment-16181721
] 

Sean Mackrory commented on HDFS-7878:
-------------------------------------

{quote}Neither API has been part of a release, yet. {quote}

But it is included in a branch that's being prepared for a release. Unless we can still squeeze
this in to beta-1 (and we may indeed be a bit late for that - [~andrew.wang]?), I would assume
this is headed for 3.1 or maybe 3.0 - and either way it would need to keep a constructor with
the same prototype as what currently exists in branch-3.0. Right?

On an unrelated note, I second your thoughts that it should be open(FileHandle) and not open(FileStatus).
But other than that, I'd +1 the rest of the patch.

> 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.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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