bionic (8) sge_shadowd.8.gz

Provided by: gridengine-master_8.1.9+dfsg-7build1_amd64 bug

NAME

       sge_shadowd - Grid Engine shadow master daemon

SYNOPSIS

       sge_shadowd

DESCRIPTION

       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.

RESTRICTIONS

       sge_shadowd may only be started by root.

ENVIRONMENT VARIABLES

       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.

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

       SGE_QMASTER_PORT
                      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 seconds.

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

       SGE_GET_ACTIVE_INTERVAL
                      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.

FILES

       <sge_root>/<cell>/common
                       Default configuration directory
       <sge_root>/<cell>/common/shadow_masters
                       Shadow master hostname file.
       <sge_root>/<cell>/spool/qmaster
                       Default master daemon spool directory
       <sge_root>/<cell>/spool/qmaster/heartbeat
                       The heartbeat file.

SEE ALSO

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

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