Provided by: gridengine-master_8.1.9+dfsg-10build1_amd64 bug


       sge_shadowd - Grid Engine shadow master daemon




       sge_shadowd  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,
       sge_qmaster(8),  and to start-up a new sge_qmaster(8) on the host on which the sge_shadowd
       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 as shadow master hosts must have shared root read/write access to the
       directory $SGE_ROOT/$SGE_CELL/common, as well as to the master daemon spool directory  (by
       default  $SGE_ROOT/$SGE_CELL/spool/qmaster).  The names of the shadow master hosts need to
       be contained in the file $SGE_ROOT/$xQS_NAME_Sxx_CELL/common/shadow_masters.


       sge_shadowd may only be started by root.


       SGE_ROOT       Specifies the location of the Grid Engine standard configuration files.

       SGE_CELL       If set, specifies the default Grid Engine cell. To address  a  Grid  Engine
                      cell sge_shadowd uses (in order of precedence):

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

                             The name of the default cell, i.e. default.

                      If set, specifies that debug information should be written  to  stderr.  In
                      addition  the  level  of  detail in which debug information is generated is

                      If set, specifies the TCP port  on  which  sge_qmaster(8)  is  expected  to
                      listen  for communication requests.  Most installations will use a services
                      map entry for the service "sge_qmaster" instead to define that port.

       SGE_DELAY_TIME This variable controls the time for which sge_shadowd pauses if a  takeover
                      bid  fails.  This  value  is  used only when there are multiple sge_shadowd
                      instances and they are contending to be the master.   The  default  is  600

                      This  variable  controls  the  interval  between  sge_shadowd checks of the
                      heartbeat file (60 seconds by default).

                      This variable controls the  interval  between  attempts  by  a  sge_shadowd
                      instance to take over when the heartbeat file has not changed.  The default
                      is 240 seconds.


                       Default configuration directory
                       Shadow master hostname file.
                       Default master daemon spool directory
                       The heartbeat file.


       sge_intro(1), sge_conf(5), sge_qmaster(8)


       See sge_intro(1) for a full statement of rights and permissions.