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



NNAAMMEE
       ge_shadowd - Grid Engine shadow master daemon

SSYYNNOOPPSSIISS
       ggee__sshhaaddoowwdd

DDEESSCCRRIIPPTTIIOONN
       _g_e___s_h_a_d_o_w_d  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, _g_e___q_m_a_s_t_e_r(8), and to start-up a new
       _g_e___q_m_a_s_t_e_r(8) on the host on which the  _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 $GE_ROOT/$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.

RREESSTTRRIICCTTIIOONNSS
       _g_e___s_h_a_d_o_w_d may only be started by root.

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

       GGEE__CCEELLLL        If set, specifies  the  default  Grid  Engine  cell.  To
                      address a Grid Engine cell _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 GE_CELL, if it is set.

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


       GGEE__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.

       GGEE__QQMMAASSTTEERR__PPOORRTT
                      If set, specifies the tcp port on which _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.

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

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

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

FFIILLEESS
       _<_g_e___r_o_o_t_>_/_<_c_e_l_l_>_/_c_o_m_m_o_n
                      Default configuration directory
       _<_g_e___r_o_o_t_>_/_<_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.
       _<_g_e___r_o_o_t_>_/_<_c_e_l_l_>_/_s_p_o_o_l_/_q_m_a_s_t_e_r
                      Default master daemon spool directory
       _<_g_e___r_o_o_t_>_/_<_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
       _g_e___i_n_t_r_o(1), _g_e___c_o_n_f(5), _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 _g_e___i_n_t_r_o(1) for a full statement of rights and permissions.



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