GE_SHADOWD(8)         Grid Engine Administrative Commands        GE_SHADOWD(8)



[1mNAME[0m
       ge_shadowd - Grid Engine shadow master daemon

[1mSYNOPSIS[0m
       [1mge_shadowd[0m

[1mDESCRIPTION[0m
       [4mge_shadowd[24m  is  a  "light weight" process which can be run on so-called
       shadow master hosts in a Grid Engine cluster to detect failure  of  the
       current Grid Engine master daemon, [4mge_qmaster[24m(8), and to start-up a new
       [4mge_qmaster[24m(8) on the host on which the  [4mge_shadowd[24m  runs.  If  multiple
       shadow  daemons  are  active  in  a  cluster, they run a protocol which
       ensures that only one of them will start-up a new master daemon.

       The  hosts suitable for being used as shadow  master  hosts  must  have
       shared root read/write access to the directory $GE_ROOT/$GE_CELL/common
       as  well  as  to  the  master  daemon  spool  directory   (by   default
       $GE_ROOT/$GE_CELL/spool/qmaster).  The names of the shadow master hosts
       need to  be  contained  in  the  file  $GE_ROOT/$xQS_NAME_Sxx_CELL/com-
       mon/shadow_masters.

[1mRESTRICTIONS[0m
       [4mge_shadowd[24m may only be started by root.

[1mENVIRONMENT VARIABLES[0m
       [1mGE_ROOT        [22mSpecifies  the location of the Grid Engine standard con-
                      figuration files.

       [1mGE_CELL        [22mIf set, specifies  the  default  Grid  Engine  cell.  To
                      address a Grid Engine cell [4mge_shadowd[24m uses (in the order
                      of precedence):

                             The name of the cell specified in the environment
                             variable GE_CELL, if it is set.

                             The name of the default cell, i.e. [1mdefault[22m.


       [1mGE_DEBUG_LEVEL [22mIf set, specifies that debug information should be writ-
                      ten to stderr. In addition the level of detail in  which
                      debug information is generated is defined.

       [1mGE_QMASTER_PORT[0m
                      If set, specifies the tcp port on which [4mge_qmaster[24m(8) is
                      expected to listen  for  communication  requests.   Most
                      installations will use a services map entry for the ser-
                      vice "sge_qmaster" instead to define that port.

       [1mGE_DELAY_TIME  [22mThis variable controls the interval in which  [4mge_shadowd[0m
                      pauses  if a takeover bid fails. This value is used only
                      when there are multiple [4mge_shadowd[24m  instances  and  they
                      are  contending  to  be  the master.  The default is 600
                      seconds.

       [1mGE_CHECK_INTERVAL[0m
                      This  variable  controls  the  interval  in  which   the
                      [4mge_shadowd[24m  checks  the  heartbeat  file  (60 seconds by
                      default).

       [1mGE_GET_ACTIVE_INTERVAL[0m
                      This variable controls the interval  when  a  [4mge_shadowd[0m
                      instance  tries to take over when the heartbeat file has
                      not changed.

[1mFILES[0m
       [4m<ge_root>/<cell>/common[0m
                      Default configuration directory
       [4m<ge_root>/<cell>/common/shadow_masters[0m
                      Shadow master hostname file.
       [4m<ge_root>/<cell>/spool/qmaster[0m
                      Default master daemon spool directory
       [4m<ge_root>/<cell>/spool/qmaster/heartbeat[0m
                      The heartbeat file.

[1mSEE ALSO[0m
       [4mge_intro[24m(1), [4mge_conf[24m(5), [4mge_qmaster[24m(8), [4mGrid[24m  [4mEngine[24m  [4mInstallation[24m  [4mand[0m
       [4mAdministration[24m [4mGuide.[0m

[1mCOPYRIGHT[0m
       See [4mge_intro[24m(1) for a full statement of rights and permissions.



GE 6.2u2                 $Date: 2007/11/08 23:04:23 $            GE_SHADOWD(8)
