weed shell starts an interactive console to do some maintenance operations.

    1. $ weed shell
    2. > help
    3. Type:    "help <command>" for help on <command>
    4.   collection.delete                 # delete specified collection
    5.   collection.list                   # list all collections
    6.   ec.balance                        # balance all ec shards among all racks and volume servers
    7.   ec.decode                         # decode a erasure coded volume into a normal volume
    8.   ec.encode                         # apply erasure coding to a volume
    9.   ec.rebuild                        # find and rebuild missing ec shards among volume servers
    10.   fs.cat                            # stream the file content on to the screen
    11.   fs.cd                             # change directory to http://<filer_server>:<port>/dir/
    12.   fs.du                             # show disk usage
    13.   fs.ls                             # list all files under a directory
    14.   fs.meta.cat                       # print out the meta data content for a file or directory
    15.   fs.meta.load                      # load saved filer meta data to restore the directory and file structure
    16.   fs.meta.notify                    # recursively send directory and file meta data to notifiction message queue
    17.   fs.meta.save                      # save all directory and file meta data to a local file for metadata backup.
    18.   fs.mv                             # move or rename a file or a folder
    19.   fs.pwd                            # print out current directory
    20.   fs.tree                           # recursively list all files under a directory
    21.   volume.balance                    # balance all volumes among volume servers
    22.   volume.copy                       # copy a volume from one volume server to another volume server
    23.   volume.delete                     # delete a live volume from one volume server
    24.   volume.fix.replication            # add replicas to volumes that are missing replicas
    25.   volume.list                       # list all volumes
    26.   volume.mount                      # mount a volume from one volume server
    27.   volume.move                       # move a live volume from one volume server to another volume server
    28.   volume.tier.download              # download the dat file of a volume from a remote tier
    29.   volume.tier.upload                # upload the dat file of a volume to a remote tier
    30.   volume.unmount                    # unmount a volume from one volume server

    For example:

    1. $ weed shell
    2. > fs.du http://localhost:8888/some/
    3. block:   4    byte:   4012896    /some/path
    4. block:   5    byte:   4700786    /some

    Another example: sometimes one of your volume server may go down, and a new volume server is added. Here is the command you can run to fix volumes that are under replicated:

    1. # check any volume that are under replicated, and there are servers that meet the replica placement requirement
    2. $ echo "volume.fix.replication -n " | weed shell
    3. replicating volume 241 001 from localhost:8080 to dataNode 127.0.0.1:7823 ...
    5. # found one, let's really do it
    6. $ echo "volume.fix.replication" | weed shell
    7. replicating volume 241 001 from localhost:8080 to dataNode 127.0.0.1:7823 ...
    9. # all volumes are replicated now
    10. $ echo "volume.fix.replication -n" | weed shell
    11. no under replicated volumes