pbs_resources_unicosmk2(7B)

🎀 NAME 🎀

okay so bestie, this is pbs_resources_unicosmk2(7B), aka the manual page for pbs_resources_unicosmk2 — pbs resources under Unicos MK2. We’re folding the manual name in right here at the top instead of copying that header line, periodt. 💅

💖 DESCRIPTION 💖

This page is your little cheat sheet for the resources and special features PBS supports on Cray Research computers running Unicos MK version 2. You specify these resources by including them in the -l option argument on the qsub or qalter command, or in the PBS job script. That’s the whole origin story. ✨

✨ RESOURCES ✨

• 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 (their spelling, not mine 😭). This defaults to whatever the PBS_MACH string is set to in local.mk. Units: string.
• host (first listing) — 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...] (yes, that opening quote is exactly what the original shows 😭). Each node_spec is a number of nodes required of the type declared in the node_spec plus a name or one or more property or properties desired for the nodes. The number, the name, and each property 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 properties 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 properties 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 and 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 (second listing) — 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. Yes, host is listed twice — both entries stay, don’t come for me. 💀
• 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 MK supports checkpoint and restart. Any description of checkpoint features in PBS are applicable to Unicos MK. ✨

📏 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. 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 🔗

Go read these too, bestie:

• 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)

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that’s the whole page, bestie 🫶 source/version on the footer is Local, the page is pbs_resources_unicosmk2(7B), and the footer didn’t give us a date — so no date to fold in, just vibes and pbs_resources_unicosmk2(7B). 💖