SGE_SHADOWD(8)

NAME
sge_shadowd - Grid Engine shadow master daemon

SYNOPSIS
sge_shadowd

DESCRIPTION
sge_shadowd is a "light weight" process which can be run on the so called shadow master hosts in a Grid Engine cluster to detect failure of the current Grid Engine master daemon and to start-up a new 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 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 (Default <sge_root>/<cell>/spool/qmaster). The shadow master hosts need to be contained in the file <sge_root>/<cell>/common/shadow_masters.

RESTRICTIONS
sge_shadowd may only be started from 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 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. 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.

COMMD_PORT
    If set, specifies the tcp port on which is expected to listen for communication requests. Most installations will use a services map entry instead to define that port.

COMMD_HOST
    If set, specifies the host on which the particular to be used for Grid Engine communication of the sge_shadowd client resides. Per default the local host is used.

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

SEE ALSO
Grid Engine Installation and Administration Guide.

COPYRIGHT
See for a full statement of rights and permissions.