Removing Hard Links

To remove a hard link using:

  • Linux, run the following command: 
    rm -f <hard link>
  • Hadoop, run the following command: 
    hadoop fs -rm <path to hard link>

Example

For example, suppose there are 4 hard links to file cite75_99.txt.

$ ls -l
total 1289433
-rwxr-xr-x 5 root root 264075431 Jul 28 13:46 cite75_99.txt
-rwxr-xr-x 5 root root 264075431 Jul 28 13:46 cite-link1
-rwxr-xr-x 5 root root 264075431 Jul 28 13:46 cite-link2
-rwxr-xr-x 5 root root 264075431 Jul 28 13:46 cite-link3
-rwxr-xr-x 5 root root 264075431 Jul 28 13:46 cite-link4

$ maprcli fid stat -fid 2142.34.131274
parent     deleteFlags     atime       gid  nlink  type       mtime       version  mode  uid  xattrInum  size       subtype   networkencryption  nblocks  compression
2142.16.2  DeleteTypeNone  1469738740  0    5      FTRegular  1469738771  1048600  755   0    0          264075431  FSTInval  false              8        lz4

To remove a hard link using:

  • Linux, run the following command: 
    rm -f cite-link1
    To verify that the command ran successfully, run the following command: 
    $ ls -l
total 1031546
-rwxr-xr-x 4 root root 264075431 Jul 28 13:46 cite75_99.txt
-rwxr-xr-x 4 root root 264075431 Jul 28 13:46 cite-link2
-rwxr-xr-x 4 root root 264075431 Jul 28 13:46 cite-link3
-rwxr-xr-x 4 root root 264075431 Jul 28 13:46 cite-link4
  • Hadoop, run the following command: 
    $ hadoop fs -rm /test-hl/cite-link2
16/07/28 13:52:00 INFO Configuration.deprecation: io.bytes.per.checksum is deprecated. Instead, use dfs.bytes-per-checksum
16/07/28 13:52:00 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 0 minutes, Emptier interval = 0 minutes.
Deleted /test-hl/cite-link2
    To verify that the command ran successfully, run the following command: 
    $ maprcli fid stat -fid 2142.34.131274
parent  deleteFlags     atime       gid  nlink  type       mtime       version  mode  uid  xattrInum  size       subtype   networkencryption  nblocks  compression
0.0.0   DeleteTypeNone  1469738740  0    3      FTRegular  1469738771  1048603  755   0    0          264075431  FSTInval  false              8        lz4