Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-16082

FsShell ls: Add option -i to print inode id

    XMLWordPrintableJSON

    Details

    • Type: Improvement
    • Status: In Progress
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 3.2.0, 3.1.1
    • Fix Version/s: None
    • Component/s: common
    • Labels:
      None

      Description

      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.

      Implementation

      For hdfs:// (HDFS)

      fileId exists in HdfsLocatedFileStatus, which is already returned to hdfs-client. We just need to print it in Ls#processPath().

      For file:// (Local FS)

      Linux

      Use java.nio.

      Windows

      Windows has the concept of "File ID" which is similar to inode id. It is unique in NTFS and ReFS.

      For other FS

      The fileId entry will be "0" in FileStatus if it is not set. We could either ignore or throw an exception.

        Attachments

        1. HADOOP-16082.001.patch
          6 kB
          Siyao Meng

          Issue Links

            Activity

              People

              • Assignee:
                smeng Siyao Meng
                Reporter:
                smeng Siyao Meng
              • Votes:
                0 Vote for this issue
                Watchers:
                8 Start watching this issue

                Dates

                • Created:
                  Updated: