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 so-called
       shadow master 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-up 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 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.

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
                      If  set, overrides the 600 seconds default minimum delay
                      before  before  a  new  _s_g_e___q_m_a_s_t_e_r(8)  is  started   by
                      _s_g_e___s_h_a_d_o_w_d _.

       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_>_/_<_c_e_l_l_>_/_c_o_m_m_o_n
                       Default configuration directory
       _<_s_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.
       _<_s_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
       _<_s_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
       _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 6.0                   $Date: 2007/09/27 13:51:37 $           SGE_SHADOWD(8)
