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drbd - Distributed Redundant Block Device driver for Linux…  more info»

drbdadm.8.gz

DRBDADM(8)                                                DRBDADM(8)



NAME
       drbdadm - Administration tool for DRBD


SYNOPSIS
       drbdadm  [  -d  ] [ -c file ] [ -s cmd ] [ -m cmd ] command [
       all | resource ... ]


DESCRIPTION
       Drbdadm is the high level tool of  the  DRBD  program  suite.
       Drbdadm  is  to drbdsetup and drbdmeta what ifup/ifdown is to
       ifconfig. Drbdadm reads its configuration file  and  performs
       the  specified  commands  by calling the drbdsetup and/or the
       drbdmeta program.

OPTIONS
       -d, --dry-run
              Just prints the calls of drbdsetup to stdout, but does
              not run the commands.

       -c, --config-file file
              Specifies  the configuration file drbdadm will use. If
              this parameter is not specified, drbdadm will look for
              /etc/drbd-08.conf and /etc/drbd.conf.

       -s, --drbdsetup file
              Specifies  the  full path to the drbdsetup program. If
              this  option  is  omitted,  drbdadm  will   look   for
              /sbin/drbdsetup and ./drbdsetup.

       -m, --drbdmeta file
              Specifies  the  full  path to the drbdmeta program. If
              this  option  is  omitted,  drbdadm  will   look   for
              /sbin/drbdmeta and ./drbdmeta.

COMMANDS
       attach Attaches  a  local  backing  block  device to the DRBD
              resource's device.

       detach

              Removes  the  backing  storage  device  from  a   DRBD
              resource's device.

       connect

              Sets  up  the  network configuration of the resource's
              device. If the peer device is already configured,  the
              two DRBD devices will connect.

       disconnect

              Removes  the  network configuration from the resource.
              The device will then go into StandAlone state.

       syncer

              Loads  the  resynchronization  parameters   into   the
              device.

       up

              Is a shortcut for attach and connect.

       down

              Is a shortcut for disconnect and detach.

       primary

              Switch  the  resource's device into primary state. You
              need to do this before any access to the device,  such
              as creating or mounting a file system.

       secondary

              Brings  the  device  back into secondary role. This is
              needed since in a connected DRBD  device  pair,   only
              one  of the two peers may have primary role (except if
              allow-two-primaries is explicitly set in the  configu‐
              ration file).

       invalidate

              Forces  DRBD to consider the data on the local backing
              storage device as  out-of-sync.  Therefore  DRBD  will
              copy each and every block over from its peer, to bring
              the local storage device back in sync.

       invalidate-remote

              This command is similar  to  the  invalidate  command,
              however, the peer's backing storage is invalidated and
              hence rewritten with the data of the local node.

       resize

              Causes DRBD to re-examine all sizing constraints,  and
              resize  the resource's device accordingly. For example
              in case you increased the size of your backing storage
              devices  (on  both  nodes  of  course), then DRBD will
              adopt to the new size after you called this command on
              one  of  your  nodes.  Since new storage space must be
              synchronised this command only works if  there  is  at
              least one primary node present.

       create-md

              Initializes  the  meta  data storage. This needs to be
              done before a DRBD resource can be  taken  online  for
              the first time.

       get-gi

              Shows  a short textual representation of the data gen‐
              eration identifiers.

       show-gi

              Prints a textual representation of the data generation
              identifiers including explanatory information.

       dump-md

              Dumps  the  whole  contents  of the meta data storage,
              including the stored bit-map and  activity-log,  in  a
              textual representation.

       outdate

              Sets the outdated flag in the meta data.

       adjust

              Synchronizes the configuration of the device with your
              configuration file. You should always examine the out‐
              put of the dry-run mode before actually executing this
              command.

       wait-connect

              Waits until  the  device  is  connected  to  its  peer
              device.

       state

              Shows  the current states of the devices (local/peer).
              E.g. Primary/Secondary

       cstate

              Shows the current connection state of the devices.

       dump

              Just parse the configuration file and dump it to  std‐
              out.  May  be used to check the configuration file for
              syntactical correctness.

       outdate

              Used to mark the node's data as outdated. Usually used
              by the peer's outdate-peer handler.

       pause-sync

              Temporarily  suspend  an  ongoing resynchronization by
              setting the local pause flag. Resync  only  progresses
              if neither the local nor the remote pause flag is set.
              It might be desirable to  postpone  DRBD's  resynchro‐
              nization  until  after  any  resynchronization  of the
              backing storage's RAID setup.

       resume-sync

              Unset the local sync pause flag.

       dstate

              Show the current state of the backing storage devices.
              (local/peer)

       hidden-commands
              Shows all commands undocumented on purpose.

VERSION
       This document was revised for version 8.0.14 of the DRBD dis‐
       tribution.

AUTHOR
       Written by Philipp Reisner  <philipp.reisner@linbit.com>  and
       Lars Ellenberg <lars.ellenberg@linbit.com>

REPORTING BUGS
       Report bugs to <drbd-user@lists.linbit.com>.

COPYRIGHT
       Copyright  2001-2008 LINBIT Information Technologies, Philipp
       Reisner, Lars Ellenberg. This  is   free  software;  see  the
       source  for  copying  conditions.   There is NO warranty; not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO
       drbd.conf(5), drbd(8), drbddisk(8)  drbdsetup(8)  drbdmeta(8)
       DRBD project web site <URL:http://www.drbd.org/>



                            27 March 2009                 DRBDADM(8)
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