[
https://issues.apache.org/jira/browse/HDFS-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14369660#comment-14369660
]
Sergey Shelukhin commented on HDFS-7878:
----------------------------------------
1) Sure
2) That seems error prone; the code operating on FileStatus will have to know
whether fileId is supposed to be there (if it's not, it's ok to be null, if
it's supposed to be there and is null, it's a bug); serialization will lose
data.Writables don't work well with optional fields...
> 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
> Attachments: HDFS-7878.01.patch, HDFS-7878.02.patch,
> HDFS-7878.03.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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
