pbs_resources_unicos8 man page

pbs_resources_unicos — pbs resources under Unicos

Description

This page summarizes the resources and special features supported by PBS for Cray Research computers running Unicos versions 8 and 9. These resources are specified by including them in the -l option argument on the qsub or qalter command or in the PBS job script.

Resources

ncpus
Maximum number of multitask processes in the job. If this is set the environment variable NCPUS will be set to the given value. Units: unitary.
cput
Maximum amount of CPU time used by all processes in the job. Root processes are not limited, see limit(2). Units: time.
mem
Maximum amount of physical memory used by all concurrent processes in the job. Units: size.
mppe
The number of processing elements used by a single process in the job. Units: unitary.
mppt
Maximum amount of wall clock time used on the MPP in the job. Units: time.
mta, mtb, mtc, ..., mth
Maximum number of magnetic tape drives required in the corresponding device class of a, b, c, ..., h. Units: unitary.
nice
The nice value under which the job is to be run. Units: unitary.
pncpus
Maximum number of processors used by any single process in the job. Units: unitary.
pcput
Maximum amount of CPU time used by any single process in the job. Units: time.
pf
Maximum number of file system blocks that can be used by all process in the job. Units: size.
pmem
Maximum amount of physical memory used by any single process in the job. Units: size.
pmppt
Maximum amount of wall clock time used on the MPP by a single process in the job. Units: time.
ppf
Maximum number of file system blocks that can be used by a single process in the job. Units: size.
procs
Maximum number of processes in the job. Units: unitary.
psds
Maximum number of data blocks on the SDS (secondary data storage) for any process in the job.
sds
Maximum number of data blocks on the SDS (secondary data storage) for the job.
srfs_tmp
Session Reservable File System (SRFS) space in TMPDIR. Note, SRFS is not supported by Cray. Units: size.
srfs_wrk
SRFS space in WRKDIR. Units: size.
srfs_big
SRFS space in BIGDIR. Units: size.
srfs_fast
SRFS space in FASTDIR. Units: size.
walltime
Maximum amount of real time during which the job can be in the running state. Units: time.
arch
Specifies the administrator defined system architecture requried. This defaults to whatever the PBS_MACH string is set to in "local.mk". Units: string.
host
Name of host on which job should be run. This resource is provided for use by the site's scheduling policy. The allowable values and effect on job placement is site dependent. Units: string.
nodes

Number and/or type of nodes to be reserved for exclusive use by the job. The value is one or more node_specs joined with the '+' character, "node_spec[+node_spec...]. Each node_spec is an number of nodes required of the type declared in the node_spec and a name or one or more properity or properities desired for the nodes. The number, the name, and each properity in the node_spec are separated by a colon ':'. If no number is specified, one (1) is assumed. Units: string.

The name of a node is its hostname. The properities of nodes are:

.
ppn=# specifying the number of processors per node requested. Defaults to 1.
.
arbitrary string assigned by the system administrator, please check with your administrator as to the node names and properities available to you.

Examples:

.
To ask for 12 nodes of any type: -l nodes=12
.
To ask for 2 "server" nodes and 14 other nodes (a total of 16): -l nodes=2:server+14
The above consist of two node_specs "2:server" and "14".
.
To ask for (a) 1 node that is a "server" and has a "hippi" interface, (b) 10 nodes that are not servers, and (c) 3 nodes that have a large amount of memory an have hippi:
-l nodes=server:hippi+10:noserver+3:bigmem:hippi
.
To ask for three nodes by name:
-l nodes=b2005+b1803+b1813
.
To ask for 2 processors on each of four nodes:
-l nodes=4:ppn=2
.
To ask for 4 processors on one node:
-l nodes=1:ppn=4
.
To ask for 2 processors on each of two blue nodes and three processors on one red node:
-l nodes=2:blue:ppn=2+red:ppn=3
host
Allows a user to specify the desired execution location. This resource is provided for use by the site's scheduling policy. The allowable values and effect on job placement is site dependent. Units: string.
other
Allows a user to specify site specific information. This resource is provided for use by the site's scheduling policy. The allowable values and effect on job placement is site dependent. Units: string.
software
Allows a user to specify software required by the job. This is useful if certain software packages are only available on certain systems in the site. This resource is provided for use by the site's scheduling policy. The allowable values and effect on job placement is site dependent. Units: string.

Examples

qsub -l nodes=15,walltime=2:00:00 script

or in a qsub script as a directive:

#PBS -l nodes=15,walltime=2:00:00

qsub -l cput=1:00:00,pcput=20:00,file=50gb,mem=15mb,mta=2 script
qalter -lcput=30:00,pmem=8mb 123.jobid
qsub -lsrfs_tmp=50mb,srfs_big=2gw script

or in a qsub script as directives:

#PBS -l cput=1:00:00,pcput=20:00,file=50gb,mem=15mb,mta=2
#PBS -lsrfs_tmp=50mb,srfs_big=2gw

Special Features

Cray Unicos supports checkpoint and restart. Any description of checkpoint features in PBS are applicable to Unicos.

Resource Units

The resource values take the following units:

time
specifies a maximum time period the resource can be used. Time is expressed in seconds as an integer, or in the form:
[[hours:]minutes:]seconds[.milliseconds]
size

specifies the maximum amount in terms of bytes or words. It is expressed in the form integer[suffix] The suffix is a multiplier defined in the following table, 'b' means bytes (the default) and 'w' means words. The size of a word is the word size on the execution host.

b or  w
bytes or words.
kb or kw
Kilo (1024) bytes or words.
mb or mw
Mega (1,048,576) bytes or words.
gb or gw
Giga (1,073,741,824) bytes or words.
unitary
The maximum amount of a resource which is expressed as a simple integer.

See Also

the PBS ERS, qsub(1B), qalter(1B), pbs_submit(3B), pbs_alterjob(3B), pbs_statjob(3b) pbs_resources_aix4(7B), pbs_resources_irix5(7B) pbs_resources_sp2(7B), pbs_resources_sunos4(7B)

Info

Local PBS