1SGE_SHADOWD(8)        Grid Engine Administrative Commands       SGE_SHADOWD(8)
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NAME

6       sge_shadowd - Grid Engine shadow master daemon
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SYNOPSIS

9       sge_shadowd
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DESCRIPTION

12       sge_shadowd is a "light weight" process which can be run on shadow mas‐
13       ter hosts in a Grid Engine cluster to detect  failure  of  the  current
14       Grid  Engine  master  daemon,  sge_qmaster(8),  and  to  start- p a new
15       sge_qmaster(8) on the host on which the sge_shadowd runs.  If  multiple
16       shadow  daemons  are  active  in  a  cluster, they run a protocol which
17       ensures that only one of them will start-up a new master daemon.
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19       The  hosts suitable for being used as shadow  master  hosts  must  have
20       shared root read/write access to the directory $SGE_ROOT/$SGE_CELL/com‐
21       mon as well as  to  the  master  daemon  spool  directory  (by  default
22       $SGE_ROOT/$SGE_CELL/spool/qmaster).   The  names  of  the shadow master
23       hosts     need     to      be      contained      in      the      file
24       $SGE_ROOT/$xQS_NAME_Sxx_CELL/common/shadow_masters.
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RESTRICTIONS

27       sge_shadowd may only be started by root.
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ENVIRONMENT VARIABLES

30       SGE_ROOT       Specifies  the location of the Grid Engine standard con‐
31                      figuration files.
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33       SGE_CELL       If set, specifies  the  default  Grid  Engine  cell.  To
34                      address  a  Grid  Engine  cell  sge_shadowd uses (in the
35                      order of precedence):
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37                             The name of the cell specified in the environment
38                             variable SGE_CELL, if it is set.
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40                             The name of the default cell, i.e. default.
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43       SGE_DEBUG_LEVEL
44                      If set, specifies that debug information should be writ‐
45                      ten to stderr. In addition the level of detail in  which
46                      debug information is generated is defined.
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48       SGE_QMASTER_PORT
49                      If  set,  specifies the tcp port on which sge_qmaster(8)
50                      is expected to listen for communication requests.   Most
51                      installations will use a services map entry for the ser‐
52                      vice "sge_qmaster" instead to define that port.
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54       SGE_DELAY_TIME This variable controls the interval in which sge_shadowd
55                      pauses  if a takeover bid fails. This value is used only
56                      when there are multiple sge_shadowd instances  and  they
57                      are  contending  to  be  the master.  The default is 600
58                      seconds.
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60       SGE_CHECK_INTERVAL
61                      This  variable  controls  the  interval  in  which   the
62                      sge_shadowd  checks  the  heartbeat  file (60 seconds by
63                      default).
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65       SGE_GET_ACTIVE_INTERVAL
66                      This variable controls the interval when  a  sge_shadowd
67                      instance  tries to take over when the heartbeat file has
68                      not changed.
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FILES

71       $SGE_ROOT/$SGE_CELL/common
72                      Default configuration directory
73       $SGE_ROOT/$SGE_CELL/common/shadow_masters
74                      Shadow master hostname file.
75       $SGE_ROOT/$SGE_CELL/spool/qmaster
76                      Default master daemon spool directory
77       $SGE_ROOT/$SGE_CELL/spool/qmaster/heartbeat
78                      The heartbeat file.
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SEE ALSO

81       sge_intro(1), sge_conf(5), sge_qmaster(8), Grid Engine Installation and
82       Administration Guide.
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85       See sge_intro(1) for a full statement of rights and permissions.
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89GE 6.1                   $Date: 2007/11/06 18:18:13 $           SGE_SHADOWD(8)
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