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24.2. Retrieving File Path from the Gluster Volume

The heal info command lists the GFIDs of the files that needs to be healed. If you want to find the path of the files associated with the GFIDs, use the getfattr utility. The getfattr utility enables you to locate a file residing on a gluster volume brick. You can retrieve the path of a file even if the filename is unknown.

24.2.1. Retrieving Known File Name
リンクのコピー

To retrieve a file path when the file name is known, execute the following command in the Fuse mount directory: 
# getfattr -n trusted.glusterfs.pathinfo -e text <path_to_fuse_mount/filename>
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Where,
path_to_fuse_mount: The fuse mount where the gluster volume is mounted.
filename: The name of the file for which the path information is to be retrieved.
For example: 
# getfattr  -n trusted.glusterfs.pathinfo -e text /mnt/fuse_mnt/File1
getfattr: Removing leading '/' from absolute path names
# file: mnt/fuse_mnt/File1
trusted.glusterfs.pathinfo="(<DISTRIBUTE:testvol-dht> (<REPLICATE:testvol-replicate-0>
<POSIX(/rhgs/brick1):tuxpad:/rhgs/brick1/File1>
<POSIX(/rhgs/brick2):tuxpad:/rhgs/brick2/File1>))"
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The command output displays the brick pathinfo under the <POSIX> tag. In this example output, two paths are displayed as the file is replicated twice and resides on a two-way replicated volume.

24.2.2. Retrieving Unknown File Name
リンクのコピー

You can retrieve the file path of an unknown file using its gfid string. The gfid string is the hyphenated version of the trusted.gfid attribute. For example, if the gfid is 80b0b1642ea4478ba4cda9f76c1e6efd, then the gfid string will be 80b0b164-2ea4-478b-a4cd-a9f76c1e6efd.

Note

To obtain the gfid of a file, run the following command: 
# getfattr -d -m. -e hex /path/to/file/on/the/brick
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24.2.3. Retrieving File Path using gfid String
リンクのコピー

To retrieve the file path using the gfid string, follow these steps:
  1. Fuse mount the volume with the aux-gfid option enabled. 
    # mount -t glusterfs -o aux-gfid-mount hostname:volume-name  <path_to_fuse_mnt>
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    Where,
    path_to_fuse_mount: The fuse mount where the gluster volume is mounted.
    For example: 
    # mount -t glusterfs -o aux-gfid-mount 127.0.0.2:testvol /mnt/aux_mount
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  2. After mounting the volume, execute the following command 
    # getfattr -n trusted.glusterfs.pathinfo -e text <path-to-fuse-mnt>/.gfid/<GFID string>
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    Where,
    path_to_fuse_mount: The fuse mount where the gluster volume is mounted.
    GFID string: The GFID string.
    For example: 
    # getfattr -n trusted.glusterfs.pathinfo -e text /mnt/aux_mount/.gfid/80b0b164-2ea4-478b-a4cd-a9f76c1e6efd
getfattr: Removing leading '/' from absolute path names
# file: mnt/aux_mount/.gfid/80b0b164-2ea4-478b-a4cd-a9f76c1e6efd trusted.glusterfs.pathinfo="(<DISTRIBUTE:testvol-dht> (<REPLICATE:testvol-replicate-0> <POSIX(/rhgs/brick2):tuxpad:/rhgs/brick2/File1> <POSIX(/rhgs/brick1):tuxpad:/rhgs/brick1/File1>))
    Copy to Clipboard Toggle word wrap
    The command output displays the brick pathinfo under the <POSIX> tag. In this example output, two paths are displayed as the file is replicated twice and resides on a two-way replicated volume.
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