Ubuntu Manpage: host_conf - Grid Engine execution host configuration file format

Provided by: gridengine-common_8.1.9+dfsg-7build1_all

NAME

       host_conf - Grid Engine execution host configuration file format

DESCRIPTION

       Host_conf reflects the format of the template file for the execution host configuration.  Via the -ae and
       -me  options  of  the  qconf(1)  command, you can add execution hosts and modify the configuration of any
       execution host in the cluster. Default execution host entries  are  added  automatically  as  soon  as  a
       sge_execd(8)  registers  to sge_qmaster(8) for the very first time from a certain host. The qconf(1) -sel
       switch can be used to display a list of execution hosts currently configured in your Grid Engine  system.
       Via the -se option you can print the execution host configuration of a specified host.

       The special hostname "global" can be used to define cluster global characteristics.

       Note  Grid  Engine  allows  backslashes  (\)  be used to escape newline characters. The backslash and the
       newline are replaced with a space character before any interpretation.

FORMAT

The format of a host_conf file is defined as follows:

hostname
The execution host's name in the format for host_name in sge_types(5).

load_scaling
A comma-separated list of scaling values to be applied to each or part of the load values being reported
by the sge_execd(8) on the host. The load scaling factors are intended to level hardware or operating
system-specific differences between execution hosts.

The syntax of a load factor specification is as follows: First the name of the load value (as defined in
the "host" complex) is given and, separated by an equal sign, the load scaling value is provided. No
blanks are allowed in the load_scaling value string.

The parameter load_scaling is not meaningful for the definition of the "global" host.

complex_values
complex_values defines quotas for resource attributes managed via this host. Each complex attribute is
followed by an "=" sign and the value specification compliant with the complex attribute type (see
complex(5)). Quota specifications are separated by commas.

The quotas are related to the resource consumption of all jobs on a host in the case of consumable
resources (see complex(5) for details on consumable resources), or they are interpreted on a per-job slot
basis in the case of non-consumable resources. Consumable resource attributes are commonly used to manage
free memory, free disk space or available floating software licenses, while non-consumable attributes
usually define distinctive characteristics like type of hardware installed.

For consumable resource attributes, an available resource amount is determined by subtracting the current
resource consumption of all running jobs on the host from the quota in the complex_values list. Jobs can
only be dispatched to a host if no resource requests exceed any corresponding resource availability
obtained by this scheme. The quota definition in the complex_values list is automatically replaced by the
current load value reported for this attribute, if load is monitored for this resource and if the
reported load value is more stringent than the quota. This effectively avoids oversubscription of
resources.

Note: Load values replacing the quota specifications may have become more stringent because they have
been scaled (see load_scaling above) and/or load adjusted (see sched_conf(5)). The -F option of qstat(1)
and the load display in the qmon(1) queue control dialog (activated by clicking on a queue icon while the
"Shift" key is pressed) provide detailed information on the actual availability of consumable resources
and on the origin of the values taken into account currently.

Note also: The resource consumption of running jobs (used for the availability calculation) as well as
the resource requests of the jobs waiting to be dispatched either may be derived from explicit user
requests during job submission (see the -l option to qsub(1)) or from a "default" value configured for an
attribute by the administrator (see complex(5)). The -r option to qstat(1) can be used for retrieving
full detail on the actual resource requests of all jobs in the system.

For non-consumable resources Grid Engine simply compares the job's attribute requests with the
corresponding specification in complex_values taking the relation operator of the complex attribute
definition into account (see complex(5)). If the result of the comparison is "true", the host is
suitable for the job with respect to the particular attribute. For parallel jobs each job slot to be
occupied by a parallel task is meant to provide the same resource attribute value.

Note: Only numeric complex attributes can be defined as consumable resources and hence non-numeric
attributes are always handled on a per job slot basis.

The default value for this parameter is NONE, i.e. no administrator defined resource attribute quotas are
associated with the host.

load_values
This entry cannot be configured but is only displayed in case of a qconf(1) -se command. All load values
are displayed as reported by the sge_execd(8) on the host. The load values are shown in a comma-separated
list. Each load value starts with its name, followed by an equal sign and the reported value.

processors
Note: Deprecated, may be removed in future release.
This entry cannot be configured but is only displayed in case of a qconf(1) -se command. Its value is the
number of "processors" which has been detected by sge_execd(8) on the corresponding host. This may
include "hardware threads" reported by the operating system.

usage_scaling
The usage_scaling parameter scales the usage figures, but only for the purposes of share tree
calculations, i.e. a scaling factor of 0 means that use of the relevant host(s) will be ignored for share
tree purposes (e.g. if hosts are dedicated for a specific use). The format is equivalent to load_scaling
(see above). However, the only valid attributes to be scaled are cpu for CPU time consumption, mem for
memory consumption aggregated over the lifetime of jobs and io for data transferred via any I/O devices.
The default NONE means "no scaling", i.e. all scaling factors are 1.

user_lists
The user_lists parameter contains a comma-separated list of so called user access lists as described in
access_list(5). Each user contained in at least one of the listed access lists has access to the host.
If the user_lists parameter is set to NONE (the default), any user has access if not explicitly excluded
via the xuser_lists parameter described below. If a user is contained both in an access list in
xuser_lists and user_lists the user is denied access to the host.

xuser_lists
The xuser_lists parameter contains a comma-separated list of so called user access lists as described in
access_list(5). Each user contained in at least one of the access lists is not allowed to access the
host. If the xuser_lists parameter is set to NONE (the default), any user has access. If a user is
contained both in xuser_lists and user_lists, the user is denied access to the host.

projects
The projects parameter contains a comma-separated list of projects that have access to the host. Any
projects not in this list are denied access to the host. If set to NONE (the default), any project has
access if not specifically excluded via the xprojects parameter described below. If a project is in both
projects and xprojects, the project is denied access to the host.

xprojects
The xprojects parameter contains a comma-separated list of projects that are denied access to the host.
If set to NONE (the default), no projects are denied access other than those denied access based on the
projects parameter described above. If a project is in both projects and xprojects, the project is
denied access to the host.

report_variables
The report_variables parameter contains a comma-separated list of variables that should be written to the
reporting file. The variables listed here will be written to the reporting file when a load report
arrives from an execution host.

Default settings can be done in the global host. Host-specific settings for report_variables will
override settings from the global host.

COPYRIGHT

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

SGE 8.1.3pre                              $Date: 2011-06-22 15:24:22 $                              HOST_CONF(5)

NAME

DESCRIPTION

FORMAT

SEE ALSO

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