Siyao Meng created HADOOP-16082:
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Summary: 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
Reporter: Siyao Meng
Assignee: Siyao Meng
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://
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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