NAME

       dpm-drain - drain a component of the Light Weight Disk Pool Manager

SYNOPSIS

       dpm-drain  --poolname  pool_name  [  --server  fs_server  ]  [  --gid  gids ] [ --group groups ] [ --size
       amount_to_drain ]

       dpm-drain --server fs_server [ --gid gids ] [ --group groups ] [ --size amount_to_drain ]

       dpm-drain --server fs_server --fs fs_name [ --gid gids ] [ --group groups ] [ --size amount_to_drain ]

       dpm-drain --help

DESCRIPTION

       dpm-drain drains a component of the Light Weight Disk Pool Manager: a filesystem,  a  disk  server  or  a
       pool, optionally filtered by a list of gids/groups. It replicates files which belong to the given list of
       gids/groups (if specified) to another filesystem and removes the original file. It gives an error message
       for files still pinned. The pool name, the disk server name or the filesystem name can be specified.

       Volatile files which have expired will not be copied and will be deleted during the draining process.

       If no specfic file server and file system is specified, or no limit is placed on the files to drain, then
       the involved active file system(s) will have their status changed to RDONLY.  If any of the involved file
       systems  are marked as DISABLED they will not have their status changed, however an attempt will still be
       made to replicate the files from them and, if successful, delete the original.

       Files which are to be moved and belong to a space will be moved to a different location (e.g. file system
       or disk server) but remain in the same space. If there is no alternate location within the same space  an
       error will be reported for the file and it will not be drained.

       Replicas  of  files  with a lifetime will also have lifetime at least as long as the original. If this is
       not possible (for example available pools have a maximum lifetime too short) then an error is  given  and
       the file will not be drained.

       This command requires ADMIN privilege.

       pool_name
              specifies the disk pool name previously defined using dpm-addpool.

       server specifies the host name of the disk server to be drained.

       fs     specifies the mount point of the dedicated filesystem.

       gid    specifies the comma separated list of gids to which the files must belong.

       group  specifies the comma separated list of groups to which the files must belong.

       size   specifies the minimum number of bytes to drain. The number may be post-fixed with 'k', 'M', 'G' or
              'T'  for  kilobyte,  Megabyte,  Gigabyte  and  Terabyte respectively.  Draining is halted once the
              desired target has been reached or passed.  If size is not specified or is given as zero dpm-drain
              will drain all eligible files.

EXAMPLE

            setenv DPM_HOST dpmhost
            setenv DPNS_HOST dpnshost

            dpm-drain --poolname Permanent

            dpm-drain --server lxb1921.cern.ch

            dpm-drain --server lxb1921.cern.ch --fs /storage

            dpm-drain --poolname Permanent --gid 105

            dpm-drain --server lxb1921.cern.ch --group dteam

            dpm-drain --server lxb1921.cern.ch --gid 105,104

EXIT STATUS

       This program returns 0 if the operation was successful or >0 if the operation failed.

SEE ALSO

       dpm(1), dpm-qryconf(1)

LCG                           $Date: 2010-04-20 09:11:48 +0200 (Tue, 20 Apr 2010) $                 DPM-DRAIN(1)