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



NNAAMMEE
       sge_shadowd - Grid Engine shadow master daemon

SSYYNNOOPPSSIISS
       ssggee__sshhaaddoowwdd

DDEESSCCRRIIPPTTIIOONN
       _s_g_e___s_h_a_d_o_w_d is a "light weight" process which can be run on shadow mas-
       ter hosts in a Grid Engine cluster to detect  failure  of  the  current
       Grid  Engine  master  daemon,  _s_g_e___q_m_a_s_t_e_r(8),  and  to  start- p a new
       _s_g_e___q_m_a_s_t_e_r(8) on the host on which the _s_g_e___s_h_a_d_o_w_d 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 $SGE_ROOT/$SGE_CELL/com-
       mon 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.

RREESSTTRRIICCTTIIOONNSS
       _s_g_e___s_h_a_d_o_w_d may only be started by root.

EENNVVIIRROONNMMEENNTT VVAARRIIAABBLLEESS
       SSGGEE__RROOOOTT       Specifies  the location of the Grid Engine standard con-
                      figuration files.

       SSGGEE__CCEELLLL       If set, specifies  the  default  Grid  Engine  cell.  To
                      address  a  Grid  Engine  cell  _s_g_e___s_h_a_d_o_w_d 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. ddeeffaauulltt.


       SSGGEE__DDEEBBUUGG__LLEEVVEELL
                      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.

       SSGGEE__QQMMAASSTTEERR__PPOORRTT
                      If  set,  specifies the tcp port on which _s_g_e___q_m_a_s_t_e_r(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.

       SSGGEE__DDEELLAAYY__TTIIMMEE This variable controls the interval in which _s_g_e___s_h_a_d_o_w_d
                      pauses  if a takeover bid fails. This value is used only
                      when there are multiple _s_g_e___s_h_a_d_o_w_d instances  and  they
                      are  contending  to  be  the master.  The default is 600
                      seconds.

       SSGGEE__CCHHEECCKK__IINNTTEERRVVAALL
                      This  variable  controls  the  interval  in  which   the
                      _s_g_e___s_h_a_d_o_w_d  checks  the  heartbeat  file (60 seconds by
                      default).

       SSGGEE__GGEETT__AACCTTIIVVEE__IINNTTEERRVVAALL
                      This variable controls the interval when  a  _s_g_e___s_h_a_d_o_w_d
                      instance  tries to take over when the heartbeat file has
                      not changed.

FFIILLEESS
       _$_S_G_E___R_O_O_T_/_$_S_G_E___C_E_L_L_/_c_o_m_m_o_n
                      Default configuration directory
       _$_S_G_E___R_O_O_T_/_$_S_G_E___C_E_L_L_/_c_o_m_m_o_n_/_s_h_a_d_o_w___m_a_s_t_e_r_s
                      Shadow master hostname file.
       _$_S_G_E___R_O_O_T_/_$_S_G_E___C_E_L_L_/_s_p_o_o_l_/_q_m_a_s_t_e_r
                      Default master daemon spool directory
       _$_S_G_E___R_O_O_T_/_$_S_G_E___C_E_L_L_/_s_p_o_o_l_/_q_m_a_s_t_e_r_/_h_e_a_r_t_b_e_a_t
                      The heartbeat file.

SSEEEE AALLSSOO
       _s_g_e___i_n_t_r_o(1), _s_g_e___c_o_n_f(5), _s_g_e___q_m_a_s_t_e_r(8), _G_r_i_d _E_n_g_i_n_e _I_n_s_t_a_l_l_a_t_i_o_n _a_n_d
       _A_d_m_i_n_i_s_t_r_a_t_i_o_n _G_u_i_d_e_.

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



GE 6.1                   $Date: 2007/11/06 18:18:13 $           SGE_SHADOWD(8)
