This is the command dpm-drain that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
dpm-drain - drain a component of the Light Weight Disk Pool Manager
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
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
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
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.
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.
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
This program returns 0 if the operation was successful or >0 if the operation failed.
Use dpm-drain online using onworks.net services