SGE_SHADOWD(8)        Grid Engine Administrative Commands       SGE_SHADOWD(8)



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

[1mSYNOPSIS[0m
       [1msge_shadowd[0m

[1mDESCRIPTION[0m
       [4msge_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, [4msge_qmaster[24m(8), and to start-up a
       new [4msge_qmaster[24m(8) on the host on which the [4msge_shadowd[24m runs. If multi-
       ple  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 <sge_root>/<cell>/common
       as  well  as  to  the  master  daemon  spool  directory   (by   default
       <sge_root>/<cell>/spool/qmaster).  The names of the shadow master hosts
       need to be contained in the  file  <sge_root>/<cell>/common/shadow_mas-
       ters.

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

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

       [1mSGE_CELL       [22mIf set, specifies  the  default  Grid  Engine  cell.  To
                      address  a  Grid  Engine  cell  [4msge_shadowd[24m uses (in the
                      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. [1mdefault[22m.


       [1mSGE_DEBUG_LEVEL[0m
                      If 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.

       [1mSGE_QMASTER_PORT[0m
                      If  set,  specifies the tcp port on which [4msge_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.

       [1mSGE_DELAY_TIME [22mThis variable controls the interval in which [4msge_shadowd[0m
                      If  set, overrides the 600 seconds default minimum delay
                      before  before  a  new  [4msge_qmaster[24m(8)  is  started   by
                      [4msge_shadowd[24m [4m.[0m

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

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

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

[1mSEE ALSO[0m
       [4msge_intro[24m(1), [4msge_conf[24m(5), [4msge_qmaster[24m(8), [4mGrid[24m [4mEngine[24m [4mInstallation[24m [4mand[0m
       [4mAdministration[24m [4mGuide.[0m

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



GE 6.0                   $Date: 2007/09/27 13:51:37 $           SGE_SHADOWD(8)
