Provided by: gridengine-common_8.1.9+dfsg-10build1_all 
NAME
complex - Grid Engine complexes configuration file format
DESCRIPTION
Complex reflects the format of the Grid Engine complex configuration. The definition of
complex attributes provides all pertinent information concerning the resource attributes a
user may request for a Grid Engine job via the qsub(1) -l option, and for the
interpretation of these parameters within the Grid Engine system.
The Grid Engine complex object defines all entries which are used for configuring the
global, host, and queue objects. The system has a set of pre-defined entries, which are
assigned to a host or queue by default. In addition, the user can define new entries and
assign them to one or more objects. Each load value has to have a corresponding complex
entry object, which defines the type and the relational operator for it.
Defining resource attributes
The complex configuration should not be accessed directly. In order to add or modify
complex entries, the qconf(1) options -Mc and -mc should be used instead. While the -Mc
option takes a complex configuration file as an argument and overrides the current
configuration, the -mc option brings up an editor filled in with the current complex
configuration.
The provided list contains all definitions of resource attributes in the system. Adding a
new entry means to provide: name, shortcut, type, relop, requestable, consumable, default,
and urgency. The fields are described below. Changing one is easily done by updating the
field to change, and removing an entry by deleting its definition. An attribute can only
be removed when it is not referenced in a host or queue object anymore. Also the system
has a set of default resource attributes which are always attached to a host or queue.
They cannot be deleted, nor can the type of such an attribute be changed.
Working with resource attributes
Before a user can request a resource attribute it has to be attached to the global, host,
or queue object. The resource attribute exists only for the objects to which it was
attached. If it is attached to the global object (qconf -me global), it exists system-
wide. Attached to a host object (qconf -me host), it exists only on that host, and
attached to queue object (qconf -mq queue), only on that queue.
When an administrator attaches a resource attribute to an object, they also have to assign
a value to it: the resource limit. A load sensor may be run to adjust the value presented
by a host down from that limit. For instance, to support requests for free space in the
/tmp filesystem, set up a load sensor to report the value (probably using df(1)) and
attach a sufficiently high limit to each host, e.g.
qconf -aattr exechost complex_values tmp_free=10T $(qconf -sel)
Default queue resource attributes
By default there is a selection of parameters in the queue configuration as defined in
queue_conf(5). The principal queue configuration parameters requestable for a job by the
user are:
qname
hostname
notify
calendar
min_cpu_interval
tmpdir
seq_no
s_rt
h_rt
s_cpu
h_cpu
s_data
h_data
s_stack
h_stack
s_core
h_core
s_rss
h_rss
Default host resource attributes
The standard set of host-related attributes consists of two categories. The first category
is built by several queue configuration attributes which are particularly suitable to be
managed on a host basis. These attributes are:
slots
s_vmem
h_vmem
s_fsize
h_fsize
(Please refer to queue_conf(5) for details.)
Note: Defining these attributes in the host complex is no contradiction to having them
also in the queue configuration. It allows maintaining the corresponding resources on a
host level, and at the same time on a queue level. Total virtual free memory (h_vmem) can
be managed for a host, for example, and a subset of the total amount can be associated
with a queue on that host.
The second attribute category in the standard host complex is that of the default load
values every sge_execd(8) periodically reports load to sge_qmaster(8). The reported load
values are either the standard Grid Engine load values, such as the CPU load average (see
uptime(1)), or load values defined by the Grid Engine administration (see the load_sensor
parameter in the cluster or host configuration (see sge_conf(5) for details). The
definition of characteristics for the standard load values is part of the default host
complex, while administrator-defined load values require extension of the host complex.
Please refer to load_parameters(5) for detailed information on the standard set of load
values.
Overriding attributes
An attribute can be assigned to the global object, host object, and queue object at the
same time. On the host level it might get its value from the user-defined resource limit
and a load sensor. If the attribute is a consumable, we have, in addition to the resource
limit and its load report at host level, also the internal usage which the system keeps
track of. The merge is done as follows:
In general an attribute can be overridden on a lower level
- global by hosts and queues
- hosts by queues and load values or resource limits on the same level.
We have one limitation for overriding attributes based on their relational operator:
!= and == operators can only be overridden on the same level, not on a lower level. The
user-defined value always overrides the load value.
>=, >, <=, and < operators can only be overridden when the new value is more restrictive
than the old one.
In the case of a consumable at host level which has also a load sensor, the system checks
for the current usage, and if the internal accounting is more restrictive than the load
sensor report, the internal value is kept; if the load sensor report is more restrictive,
that one is kept.
FORMAT
The principal format of a complex configuration is that of a tabulated list. Each line
starting with a '#' character is a comment line. Each non-comment line defines one element
of the complex. Backslashes (\) be used to escape newline characters. The backslash and
the newline are replaced with a space character before any interpretation.
An element definition line consists of the following 8 column entries per line (in order
of appearance):
name
The name of the complex element to be used to request this attribute for a job in the
qsub(1) -l option. A complex attribute name (see complex_name in sge_types(5)) may appear
only once across all complexes, i.e. the complex attribute definition is unique.
shortcut
A shortcut for name which may also be used to request this attribute for a job in the
qsub(1) -l option. A given shortcut may appear only once across all complexes, so as to
avoid the possibility of ambiguous complex attribute references.
type
This setting determines how the corresponding values are to be treated by Grid Engine
internally in comparisons or in load scaling for the load complex entries:
• With INT only raw integers are allowed.
• With DOUBLE floating point numbers in double precision (decimal and scientific
notation) can be specified.
• With TIME time specifiers are allowed. Refer to sge_types(5) for a format description.
• With MEMORY memory size specifiers are allowed. Refer to sge_types(5) for a format
description.
• With BOOL the strings TRUE and FALSE are allowed. When used in a load formula (refer to
sched_conf(5)), TRUE and FALSE get mapped into '1' and '0'.
• With STRING all strings are allowed and are used for wildcard regular boolean
expression matching. Please see the sge_types(5) man page for expression definition.
Examples:
-l arch="*x*|sol*" :
results in "arch=lx-x86" OR "arch=lx-amd64"
OR "arch=sol-amd64" OR ...
-l arch="sol-x??" :
results in "arch=sol-x86" OR "arch=sol-x64" OR ...
-l arch="lx2[246]-x86" :
results in "arch=lx22-x86" OR "arch=lx24-x86"
OR "arch=lx26-x86"
-l arch="lx2[4-6]-x86" :
results in "arch=lx24-x86" OR "arch=lx25-x86"
OR "arch=lx26-x86"
-l arch="lx2[24-6]-x86" :
results in "arch=lx22-x86" OR "arch=lx24-x86"
OR "arch=lx25-x86" OR "arch=lx26-x86"
-l arch="!lx-x86&!sol-amd64" :
results in NEITHER "arch=lx-x86" NOR "arch=sol-amd64"
-l arch="lx2[4|6]-amd64" :
results in "arch=lx24-amd64" OR "arch=lx26-amd64"
• CSTRING is like STRING except comparisons are case insensitive.
• RESTRING is the same as STRING for historical compatibility, but is deprecated and may
be removed in future..
• HOST is like CSTRING but the expression must match a valid host name.
relop
The relation operator is used when the value requested by the user for this parameter is
compared against the corresponding value configured for the considered queues. If the
result of the comparison is false, the job cannot run in this queue. Possible relation
operators are "==", "<", ">", "<=", ">=" and "EXCL". The only valid operator for string
type attributes is "==".
The "EXCL" relation operator implements exclusive scheduling and is only valid for
consumable boolean type attributes. Exclusive means the result of the comparison is only
true if a job requests to be exclusive, and no other exclusive or non-exclusive job uses
the complex. If the job does not request to be exclusive and no other exclusive job uses
the complex the comparison is also true.
requestable
The entry can be used in a qsub(1) resource request if this field is set to 'y' or 'yes'.
If set to 'n' or 'no' this entry cannot be used by a user in order to request a queue or a
class of queues. If the entry is set to 'forced' or 'f' the attribute has to be requested
by a job, or it is rejected.
To enable resource request enforcement the existence of the resource has to be defined.
This can be done on a cluster global, per host and per queue basis. The definition of
resource availability is performed with the complex_values entry in host_conf(5) and
queue_conf(5).
consumable
The consumable parameter can be set to either 'yes' ('y' abbreviated), 'no' ('n') or 'JOB'
('j'). It can be set to 'yes' and 'JOB' only for numeric attributes (INT, DOUBLE, MEMORY,
TIME - see type above). If set to 'yes' or 'JOB' the consumption of the corresponding
resource can be managed by Grid Engine internal bookkeeping. In this case Grid Engine
accounts for the consumption of this resource for all running jobs and ensures that jobs
are only dispatched if the Grid Engine internal bookkeeping indicates enough available
consumable resources. Consumables are an efficient means to manage limited resources such
as available memory, free space on a file system, network bandwidth or floating software
licenses.
A consumable defined by 'y' is a per-slot consumable, which means the limit is multiplied
by the number of slots being used by the job before being applied. In case of 'j' the
consumable is a per-job consumable. This resource is debited as requested (without
multiplication) from the allocated master queue. The resource need not be available for
the slave task queues.
Consumables can be combined with default or user-defined load parameters (see sge_conf(5)
and host_conf(5)), i.e. load values can be reported for consumable attributes, or the
consumable flag can be set for load attributes. The Grid Engine consumable resource
management takes both the load (measuring availability of the resource) and the internal
bookkeeping into account in this case, and makes sure that neither exceeds a given limit.
To enable consumable resource management, the basic availability of a resource has to be
defined. This can be done on a cluster global, per host and per queue basis, and these
categories may supersede each other in the given order (i.e. a host can restrict
availability of a cluster resource and a queue can restrict host and cluster resources).
The definition of resource availability is performed with the complex_values entry in
host_conf(5) and queue_conf(5). The complex_values definition of the "global" host
specifies cluster global consumable settings. To each consumable complex attribute in a
complex_values list, a value is assigned which denotes the maximum available amount for
that resource. The internal bookkeeping will subtract from this total the assumed resource
consumption by all running jobs as expressed through the jobs' resource requests.
Note: Jobs can be forced to request a resource and thus to specify their assumed
consumption via a forced value of the requestable parameter (see above).
Note also: A default resource consumption value can be pre-defined by the administrator
for consumable attributes not explicitly requested by the job (see the default parameter
below). This is meaningful only if requesting the attribute is not enforced as explained
above.
default
Meaningful only for consumable complex attributes (see consumable parameter above) and
must be specified as 0 otherwise. Grid Engine assumes the resource amount denoted in the
default parameter implicitly to be consumed by jobs being dispatched to a host or queue
managing the consumable attribute. Jobs explicitly requesting the attribute via the -l
option to qsub(1) override this default value.
urgency
The urgency value allows influencing job priorities on a per-resource base. The urgency
value effects the addend for each resource when determining the resource request-related
urgency contribution. For numeric type resource requests the addend is the product of the
urgency value, the job's assumed slot allocation, and the per-slot request as specified
via the -l option to qsub(1). For string type requests the resource's urgency value is
directly used as addend. Urgency values are of type real. See under sge_priority(5) for an
overview of job priorities.
SEE ALSO
sge_intro(1), sge_types(1), qconf(1), qsub(1), uptime(1), host_conf(5),
load_parameters(5), queue_conf(5), sge_execd(8), sge_qmaster(8)
COPYRIGHT
See sge_intro(1) for a full statement of rights and permissions.