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

6       ge_shadowd - Grid Engine shadow master daemon
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SYNOPSIS

9       ge_shadowd
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DESCRIPTION

12       ge_shadowd  is  a  "light weight" process which can be run on so-called
13       shadow master hosts in a Grid Engine cluster to detect failure  of  the
14       current Grid Engine master daemon, ge_qmaster(8), and to start-up a new
15       ge_qmaster(8) on the host on which the  ge_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 $GE_ROOT/$GE_CELL/common
21       as  well  as  to  the  master  daemon  spool  directory   (by   default
22       $GE_ROOT/$GE_CELL/spool/qmaster).  The names of the shadow master hosts
23       need to  be  contained  in  the  file  $GE_ROOT/$xQS_NAME_Sxx_CELL/com‐
24       mon/shadow_masters.
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RESTRICTIONS

27       ge_shadowd may only be started by root.
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ENVIRONMENT VARIABLES

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

70       <ge_root>/<cell>/common
71                      Default configuration directory
72       <ge_root>/<cell>/common/shadow_masters
73                      Shadow master hostname file.
74       <ge_root>/<cell>/spool/qmaster
75                      Default master daemon spool directory
76       <ge_root>/<cell>/spool/qmaster/heartbeat
77                      The heartbeat file.
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SEE ALSO

80       ge_intro(1), ge_conf(5), ge_qmaster(8), Grid  Engine  Installation  and
81       Administration Guide.
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84       See ge_intro(1) for a full statement of rights and permissions.
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88GE 6.2u5                 $Date: 2007/11/08 23:04:23 $            GE_SHADOWD(8)
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