sge_shadowd - Sun Grid Engine shadow master daemon
sge_shadowd is a "light weight" process which can be run on
so-called shadow master hosts in a Sun Grid Engine cluster
to detect failure of the current Sun Grid Engine master dae-
mon, 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
The hosts suitable for being used 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_shadowd may only be started by root.
SGE_ROOT Specifies the location of the Sun Grid Engine
standard configuration files.
SGE_CELL If set, specifies the default Sun Grid Engine
cell. To address a Sun Grid Engine cell
sge_shadowd uses (in the order of pre-
The name of the cell specified in the
environment variable SGE_CELL, if it is
The name of the default cell, i.e.
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.
If set, specifies the tcp port on which
sge_qmaster(8) is expected to listen for com-
munication 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 interval in which
sge_shadowd pauses if a takeover bid fails.
This value is used only when there are multi-
ple sge_shadowd instances and they are con-
tending to be the master. The default is 600
This variable controls the interval in which
the sge_shadowd checks the heartbeat file (60
seconds by default).
This variable controls the interval when a
sge_shadowd instance tries to take over when
the heartbeat file has not changed.
Default configuration directory
Shadow master hostname file.
Default master daemon spool directory
The heartbeat file.
sge_intro(1), sge_conf(5), sge_qmaster(8), Sun Grid Engine
Installation and Administration
See sge_intro(1) for a full statement of rights and permis-
Man(1) output converted with