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https://issues.apache.org/jira/browse/HADOOP-16082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16824485#comment-16824485
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Siyao Meng commented on HADOOP-16082:
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[~adam.antal] Thanks for the comment.
I believe your idea is another way to display the inode id, but not how we
could expose fileId from FileStatus, which is actual problem I'm facing.
Since fileId is only in HdfsLocatedFileStatus but not in FileStatus and I
shouldn't risk changing a public stable interface (just in order to expose
fileId), I have to work around this. I think I'll stick to Steve's suggestion
of using toString() then.
> FsShell ls: Add option -i to print inode id
> -------------------------------------------
>
> Key: HADOOP-16082
> URL: https://issues.apache.org/jira/browse/HADOOP-16082
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Affects Versions: 3.2.0, 3.1.1
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Attachments: HADOOP-16082.001.patch
>
>
> When debugging the FSImage corruption issue, I often need to know a file's or
> directory's inode id. At this moment, the only way to do that is to use OIV
> tool to dump the FSImage and look up the filename, which is very inefficient.
> Here I propose adding option "-i" in FsShell that prints files' or
> directories' inode id.
> h2. Implementation
> h3. For hdfs:// (HDFS)
> fileId exists in HdfsLocatedFileStatus, which is already returned to
> hdfs-client. We just need to print it in Ls#processPath().
> h3. For file:// (Local FS)
> h4. Linux
> Use java.nio.
> h4. Windows
> Windows has the concept of "File ID" which is similar to inode id. It is
> unique in NTFS and ReFS.
> h3. For other FS
> The fileId entry will be "0" in FileStatus if it is not set. We could either
> ignore or throw an exception.
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