Provided by: slurm-llnl_1.3.6-1_i386 bug

NAME

       slurm.conf - Slurm configuration file

DESCRIPTION

       /etc/slurm.conf   is  an  ASCII  file  which  describes  general  SLURM
       configuration information, the nodes to be managed,  information  about
       how  those  nodes  are  grouped into partitions, and various scheduling
       parameters associated  with  those  partitions.  This  file  should  be
       consistent across all nodes in the cluster.

       The  file  location  can  be  modified  at  system build time using the
       DEFAULT_SLURM_CONF parameter. In addition, you can use  the  SLURM_CONF
       environment  variable  to  override the built-in location of this file.
       The SLURM daemons also allow you to  override  both  the  built-in  and
       environment-provided  location  using  the  "-f"  option on the command
       line.

       Note the while SLURM daemons  create  log  files  and  other  files  as
       needed,  it  treats  the  lack  of parent directories as a fatal error.
       This prevents the daemons from running if critical file systems are not
       mounted  and  will minimize the risk of cold-starting (starting without
       preserving jobs).

       The contents of the file are case insensitive except for the  names  of
       nodes  and  partitions.  Any  text following a "#" in the configuration
       file is treated as a comment through the end of that line.  The size of
       each  line  in  the file is limited to 1024 characters.  Changes to the
       configuration file take effect upon restart of  SLURM  daemons,  daemon
       receipt  of  the  SIGHUP  signal, or execution of the command "scontrol
       reconfigure" unless otherwise noted.

       If a line begins with the word "Include"  followed  by  whitespace  and
       then  a  file  name, that file will be included inline with the current
       configuration file.

       The overall configuration parameters available include:

       AccountingStorageEnforce
              If set to a non-zero value  and  the  user,  partition,  account
              association  is not defined for a job in the accounting database
              then prevent the job from being executed.  The default value  is
              zero.

       AccountingStorageHost
              Define the name of the host where the database is running we are
              going to store the accounting data.  Only used for database type
              storage     plugins,     ignored     otherwise.      Also    see
              DefaultStorageHost.

       AccountingStorageLoc
              Specifies the location of the file or database where  accounting
              records are written.  Also see DefaultStorageLoc.

       AccountingStoragePass
              Define the password used to gain access to the database to store
              the accounting  data.   Only  used  for  database  type  storage
              plugins, ignored otherwise.  In the case of Slurm DBD (Data Base
              Daemon) with Munge authentication this can be configured to  use
              a Munge daemon specifically configured to provide authentication
              between  clusters  while  the  default  Munge  daemon   provides
              authentication    within    a    cluster.     In    that   case,
              AccountingStoragePass should specify the named port to  be  used
              for   communications  with  the  alternate  Munge  daemon  (e.g.
              "/var/run/munge/global.socket.2"). The default  value  is  NULL.
              Also see DefaultStoragePass.

       AccountingStoragePort
              Define the port the database server is listening on where we are
              going to store the accounting data.  Only used for database type
              storage     plugins,     ignored     otherwise.      Also    see
              DefaultStoragePort.

       AccountingStorageType
              Define the accounting storage mechanism type.  Acceptable values
              at       present      include      "accounting_storage/filetxt",
              "accounting_storage/gold",           "accounting_storage/mysql",
              "accounting_storage/none",    "accounting_storage/pgsql",    and
              "accounting_storage/slurmdbd".             The             value
              "accounting_storage/filetxt"  indicates  that accounting records
              will   be   written   to   a   the   file   specified   by   the
              AccountingStorageLoc         parameter.         The        value
              "accounting_storage/gold" indicates that account records will be
              written                          to                         Gold
              (http://www.clusterresources.com/pages/products/gold-allocation-
              manager.php),  which  maintains  its  own  database.   The value
              "accounting_storage/mysql"  indicates  that  accounting  records
              should   be  written  to  a  MySQL  database  specified  by  the
              AccountingStorageLoc   parameter.    The   default   value    is
              "accounting_storage/none",  which means that account records are
              not maintained.  The value "accounting_storage/pgsql"  indicates
              that  accounting  records  should  be  written  to  a PostgreSQL
              database specified by the AccountingStorageLoc  parameter.   The
              value  "accounting_storage/slurmdbd"  indicates  that accounting
              records will be written to SlurmDDB, which manages an underlying
              MySQL  or  PostgreSQL  database.  See  "man  slurmdbd"  for more
              information.  Also see DefaultStorageType.

       AccountingStorageUser
              Define the name of the user we  are  going  to  connect  to  the
              database  with  to  store  the  accounting  data.  Only used for
              database type storage  plugins,  ignored  otherwise.   Also  see
              DefaultStorageUser.

       AuthType
              Define  the  authentication  method  for  communications between
              SLURM  components.   Acceptable  values   at   present   include
              "auth/none",  "auth/authd", and "auth/munge".  The default value
              is "auth/none", which means the UID  included  in  communication
              messages  is  not  verified.   This  may  be  fine  for  testing
              purposes, but do not use "auth/none" if you desire any security.
              "auth/authd"  indicates  that  Brett  Chun’s authd is to be used
              (see "http://www.theether.org/authd/" for more information, Note
              that  authd  is  no  longer  actively  supported).  "auth/munge"
              indicates that LLNL’s MUNGE is to be  used  (this  is  the  best
              supported    authentication    mechanism    for    SLURM,    see
              "http://home.gna.org/munge/" for more information).   All  SLURM
              daemons  and  commands  must be terminated prior to changing the
              value of  AuthType  and  later  restarted  (SLURM  jobs  can  be
              preserved).

       BackupAddr
              Name that BackupController should be referred to in establishing
              a communications path. This name will be used as an argument  to
              the  gethostbyname()  function  for identification. For example,
              "elx0000" might be used to designate the  Ethernet  address  for
              node  "lx0000".   By default the BackupAddr will be identical in
              value to BackupController.

       BackupController
              The name of the machine where SLURM control functions are to  be
              executed  in  the event that ControlMachine fails. This node may
              also be used as a compute server if so  desired.  It  will  come
              into   service   as  a  controller  only  upon  the  failure  of
              ControlMachine and will revert to  a  "standby"  mode  when  the
              ControlMachine  becomes  available once again.  This should be a
              node name without the full domain name (e.g.  "lx0002").   While
              not  essential,  it  is  recommended  that  you specify a backup
              controller.  See  the  RELOCATING  CONTROLLERS  section  if  you
              change this.

       CacheGroups
              If  set to 1, the slurmd daemon will  cache /etc/groups entries.
              This can improve performance for highly  parallel  jobs  if  NIS
              servers  are  used  and  unable  to  respond  very quickly.  The
              default value is 0 to disable caching group data.

       CheckpointType
              Define the system-initiated checkpoint method  to  be  used  for
              user  jobs.  The slurmctld daemon must be restarted for a change
              in CheckpointType to take effect.  Acceptable values at  present
              include     "checkpoint/aix"     (only    on    AIX    systems),
              "checkpoint/ompi" (requires  OpenMPI  version  1.3  or  higher),
              "checkpoint/xlch"  (for  XLCH, requires that SlurmUser be root),
              and "checkpoint/none".  The default value is  "checkpoint/none".

       ClusterName
              The  name  by  which  this  SLURM  managed  cluster is known for
              accounting  purposes.  This  is   needed   distinguish   between
              accounting  data  from  multiple  clusters  being  recorded in a
              single database.

       ControlAddr
              Name that ControlMachine should be referred to in establishing a
              communications  path.  This  name will be used as an argument to
              the gethostbyname() function for  identification.  For  example,
              "elx0000"  might  be  used to designate the Ethernet address for
              node "lx0000".  By default the ControlAddr will be identical  in
              value to ControlMachine.

       ControlMachine
              The  name  of  the  machine  where  SLURM  control functions are
              executed as returned by the gethostname() function  the  cut  at
              the  first  dot  or  the  hostname -s command (e.g. use "tux001"
              rather than "tux001.my.com").  This  value  must  be  specified.
              See  the RELOCATING CONTROLLERS section if you change this.

       CryptoType
              Define  the  cryptographic  signature  tool  to  be  used in the
              creation of job step credentials.  The slurmctld daemon must  be
              restarted for a change in CryptoType to take effect.  Acceptable
              values at present include "crypto/munge"  and  "crypto/openssl".
              OpenSSL  offers  the  best  performance and is available with an
              Apache style open source license.  Munge is a little slower, but
              is  available  under  the Gnu General Public License (GPL).  The
              default value is "crypto/openssl".

       DefMemPerCPU
              Default  real  memory  size  available  per  allocated  CPU   in
              MegaBytes.   Used  to  avoid over-subscribing memory and causing
              paging.  DefMemPerCPU would  generally  be  used  if  individual
              processors  are  alocated  to jobs (SelectType=select/cons_res).
              The default value is 0 (unlimited).  Also see DefMemPerNode  and
              MaxMemPerCPU.    DefMemPerCPU  and  DefMemPerNode  are  mutually
              exclusive.

       DefMemPerNode
              Default  real  memory  size  available  per  allocated  node  in
              MegaBytes.   Used  to  avoid over-subscribing memory and causing
              paging.  DefMemPerNode would generally be used  if  whole  nodes
              are  alocated  to  jobs (SelectType=select/linear) and resources
              are shared (Shared=yes or Shared=force).  The default value is 0
              (unlimited).    Also   see   DefMemPerCPU   and   MaxMemPerNode.
              DefMemPerCPU and DefMemPerNode are mutually exclusive.

       DefaultStorageHost
              Define the name of the host where the database  is  running  and
              used  to  to store the accounting and job completion data.  Only
              used for database type storage plugins, ignored otherwise.  Also
              see AccountingStorageHost and JobCompHost.

       DefaultStorageLoc
              Specifies  the location of the file or database where accounting
              and   job   completion   records   are   written.    Also    see
              AccountingStorageLoc and JobCompLoc.

       DefaultStoragePass
              Define the password used to gain access to the database to store
              the accounting and job completion data.  Only used for  database
              type    storage    plugins,   ignored   otherwise.    Also   see
              AccountingStoragePass and JobCompPass.

       DefaultStoragePort
              Define the port the database server is listening on where we are
              going  to  store  the  accounting and job completion data.  Only
              used for database type storage plugins, ignored otherwise.  Also
              see AccountingStoragePort and JobCompPort.

       DefaultStorageType
              Define the accounting and job completion storage mechanism type.
              Acceptable values at present include "filetxt", "gold", "mysql",
              "none",  "pgsql", and "slurmdbd".  The value "filetxt" indicates
              that records will be written to a the file.   The  value  "gold"
              indicates    that    records    will    be   written   to   Gold
              (http://www.clusterresources.com/pages/products/gold-allocation-
              manager.php),  which  maintains  its  own  database.   The value
              "mysql" indicates that accounting records will be written  to  a
              mysql  database.   The default value is "none", which means that
              records are not maintained.  The value  "pgsql"  indicates  that
              records  will  be  written  to  a postresql database.  The value
              "slurmdbd" indicates that records will be written  to  SlurmDbd,
              which  maintains  its  own  database. See "man slurmdbd for more
              information".  Also see AccountingStorageType  and  JobCompType.

       DefaultStorageUser
              Define  the  name  of  the  user  we are going to connect to the
              database with to store the accounting and job  completion  data.
              Only  used for database type storage plugins, ignored otherwise.
              Also see AccountingStorageUser and JobCompUser.

       DisableRootJobs
              If set to "YES" then user root will be  prevented  from  running
              any  jobs.  The default value is "NO", meaning user root will be
              able to execute  jobs.   DisableRootJobs  may  also  be  set  by
              partition.

       EnforcePartLimits
              If set to "YES" then jobs which exceed a partition’s size and/or
              time limits will be rejected at submission time. If set to  "NO"
              then  the  job  will  be  accepted  and  remain queued until the
              partition limits are altered.  The default value is "NO".

              Epilog Fully qualified pathname of a script to execute  as  user
              root   on   every   node  when  a  user’s  job  completes  (e.g.
              "/usr/local/slurm/epilog"). This may be  used  to  purge  files,
              disable user login, etc. By default there is no epilog.

       EpilogMsgTime
              The  number of microseconds the the slurmctld daemon requires to
              process an epilog completion message from  the  slurmd  dameons.
              This  parameter  can  be  used  to  prevent  a  burst  of epilog
              completion messages from being  sent  at  the  same  time  which
              should  help  prevent  lost  messages and improve throughput for
              large jobs.  The default value is 2000 microseconds.  For a 1000
              node  job,  this spreads the epilog completion messages out over
              two seconds.

       FastSchedule
              Controls how a nodes configuration specifications in  slurm.conf
              are  used.   If  the number of node configuration entries in the
              configuration file is significantly lower  than  the  number  of
              nodes,  setting  FastSchedule  to  1  will  permit  much  faster
              scheduling decisions to be made.  (The scheduler can just  check
              the  values  in  a few configuration records instead of possibly
              thousands  of  node  records.  If  a  job  can’t  be   initiated
              immediately,  the scheduler may execute these tests repeatedly.)
              Note that on systems with hyper-threading, the  processor  count
              reported by the node will be twice the actually processor count.
              Consider  which  value  you  want  to  be  used  for  scheduling
              purposes.

              1 (default)
                   Consider   the  configuration  of  each  node  to  be  that
                   specified in the configuration file and any node with  less
                   than the configured resources will be set DOWN.

              0    Base  scheduling decisions upon the actual configuration of
                   each individual node.

              2    Consider  the  configuration  of  each  node  to  be   that
                   specified in the slurm.conf configuration file and any node
                   with less resources than configured will not be  set  DOWN.
                   This can be useful for testing purposes.

       FirstJobId
              The job id to be used for the first submitted to SLURM without a
              specific  requested  value.  Job  id   values   generated   will
              incremented  by  1  for each subsequent job. This may be used to
              provide a meta-scheduler with a job id space which  is  disjoint
              from the interactive jobs.  The default value is 1.

       GetEnvTimeout
              Used  for Moab scheduled jobs only. Controls how long job should
              wait in  seconds  for  loading  the  user’s  environment  before
              attempting  to  load it from a cache file. Applies when the srun
              or sbatch --get-user-env option is used. If set to 0 then always
              load  the  user’s  environment from the cache file.  The default
              value is 2 seconds.

       HealthCheckInterval
              The    interval    in    seconds    between    executions     of
              HealthCheckProgram.   The  default value is zero, which disables
              execution.

       HealthCheckProgram
              Fully qualified pathname of a script to  execute  as  user  root
              periodically  on  all  compute  nodes  that  are not in the DOWN
              state. This may be used to verify the node is fully  operational
              and  DRAIN  the  it otherwise.  The interval is controlled using
              the    HealthCheckInterval    parameter.     Note    that    the
              HealthCheckProgram  will  be  executed  at  the same time on all
              nodes to minimize  its  impact  upon  parallel  programs.   This
              program  is  will  be  killed  if it does not terminate normally
              within 60 seconds.  By default, no program will be executed.

       InactiveLimit
              The interval, in seconds, a job or job step is permitted  to  be
              inactive  before  it  is  terminated.  A  job  or  job  step  is
              considered inactive  if  the  associated  srun  command  is  not
              responding   to   slurm  daemons.  This  could  be  due  to  the
              termination of the srun  command  or  the  program  being  is  a
              stopped  state.  A batch job is considered inactive if it has no
              active job steps (e.g. periods  of  pre-  and  post-processing).
              This limit permits defunct jobs to be purged in a timely fashion
              without waiting for their time limit to be reached.  This  value
              should reflect the possibility that the srun command may stopped
              by a debugger or considerable time could be required  for  batch
              job  pre-  and  post-processing.  This limit is ignored for jobs
              running in partitions with the RootOnly flag set (the  scheduler
              running  as  root will be responsible for the job).  The default
              value is unlimited (zero).  May not exceed 65533.

       JobAcctGatherType
              Define the job accounting mechanism type.  Acceptable values  at
              present include "jobacct_gather/aix" (for AIX operating system),
              "jobacct_gather/linux"  (for   Linux   operating   system)   and
              "jobacct_gather/none"   (no  accounting  data  collected).   The
              default value is "jobacct_gather/none".  In  order  to  use  the
              sacct  tool, "jobacct_gather/aix" or "jobacct_gather/linux" must
              be configured.

       JobAcctGatherFrequency
              Define   the   job   accounting    sampling    interval.     For
              jobacct_gather/none    this    parameter    is   ignored.    For
              jobacct_gather/aix and jobacct_gather/linux the parameter  is  a
              number is seconds between sampling job state.  The default value
              is 30 seconds.  A value of zero disables real the  periodic  job
              sampling   and  provides  accounting  information  only  on  job
              termination (reducing SLURM interference with the job).

       JobCompHost
              Define the name of the host where the database  is  running  and
              used  to  store the job completion data.  Only used for database
              type   storage   plugins,   ignored   otherwise.     Also    see
              DefaultStorageHost.

       JobCompLoc
              The  interpretation  of  this  value  depends  upon  the logging
              mechanism  specified  by  the  JobCompType  parameter  either  a
              filename or a database name.  Also see DefaultStorageLoc.

       JobCompPass
              Define the password used to gain access to the database to store
              the job completion data.  Only used for  database  type  storage
              plugins, ignored otherwise.  Also see DefaultStoragePass.

       JobCompPort
              Define the port the database server is listening on where we are
              going to store the job completion data.  Only used for  database
              type    storage    plugins,   ignored   otherwise.    Also   see
              DefaultStoragePort.

       JobCompType
              Define the job completion logging  mechanism  type.   Acceptable
              values  at  present  include  "jobcomp/none", "jobcomp/filetxt",
              "jobcomp/mysql", "jobcomp/pgsql",  and  "jobcomp/script"".   The
              default  value  is  "jobcomp/none",  which  means  that upon job
              completion the record of the job is purged from the system.   If
              using  the  accounting  infrastructure this plugin may not be of
              interest since the information here  is  redundant.   The  value
              "jobcomp/filetxt"  indicates  that a record of the job should be
              written to a text file specified by  the  JobCompLoc  parameter.
              The  value  "jobcomp/mysql"  indicates  that a record of the job
              should  be  written  to  a  mysql  database  specified  by   the
              JobCompLoc  parameter.  The value "jobcomp/pgsql" indicates that
              a record of the job should be written to a  postgresql  database
              specified    by    the    JobCompLoc   parameter.    The   value
              "jobcomp/script"  indicates  that  a  script  specified  by  the
              JobCompLoc   parameter   is  to  be  executed  with  environment
              variables indicating the job information.

       JobCompUser
              Define the name of the user we  are  going  to  connect  to  the
              database  with  to store the job completion data.  Only used for
              database type storage  plugins,  ignored  otherwise.   Also  see
              DefaultStorageUser.

       JobCredentialPrivateKey
              Fully qualified pathname of a file containing a private key used
              for authentication by Slurm daemons.  This parameter is  ignored
              if CryptType=munge.

       JobCredentialPublicCertificate
              Fully  qualified pathname of a file containing a public key used
              for authentication by Slurm daemons.  This parameter is  ignored
              if CryptType=munge.

       JobFileAppend
              This  option controls what to do if a job’s output or error file
              exist when the job is started.  If JobFileAppend  is  set  to  a
              value  of  1, then append to the existing file.  By default, any
              existing file is truncated.

       JobRequeue
              This option controls what to do by default after a node failure.
              If  JobRequeue  is  set to a value of 1, then any job running on
              the failed node will be  requeued  for  execution  on  different
              nodes.   If  JobRequeue  is  set  to  a value of 0, then any job
              running on the failed node will be terminated.  Use  the  sbatch
              --no-requeue  or --requeue option to change the default behavior
              for individual jobs.  The default value is 1.

       KillWait
              The interval, in seconds, given to a job’s processes between the
              SIGTERM  and  SIGKILL  signals upon reaching its time limit.  If
              the job fails to terminate gracefully in the interval specified,
              it  will  be  forcibly  terminated.   The  default  value  is 30
              seconds.  May not exceed 65533.

       Licenses
              Specification of licenses (or other resources available  on  all
              nodes  of  the cluster) which can be allocated to jobs.  License
              names can optionally be followed by an asterisk and count with a
              default  count  of  one.  Multiple license names should be comma
              separated  (e.g.   "Licenses=foo*4,bar").    Note   that   SLURM
              prevents  jobs  from  being  scheduled if their required license
              specification is not available.  SLURM  does  not  prevent  jobs
              from  using  licenses  that are not explicitly listed in the job
              submission specification.

       MailProg
              Fully qualified pathname to the program used to send  email  per
              user request.  The default value is "/bin/mail".

       MaxJobCount
              The maximum number of jobs SLURM can have in its active database
              at one time. Set the values  of  MaxJobCount  and  MinJobAge  to
              insure the slurmctld daemon does not exhaust its memory or other
              resources. Once  this  limit  is  reached,  requests  to  submit
              additional  jobs will fail. The default value is 5000 jobs. This
              value may not be reset via "scontrol reconfig".  It  only  takes
              effect  upon  restart  of  the slurmctld daemon.  May not exceed
              65533.

       MaxMemPerCPU
              Maximum  real  memory  size  available  per  allocated  CPU   in
              MegaBytes.   Used  to  avoid over-subscribing memory and causing
              paging.  MaxMemPerCPU would  generally  be  used  if  individual
              processors  are  alocated  to jobs (SelectType=select/cons_res).
              The default value is 0 (unlimited).  Also see  DefMemPerCPU  and
              MaxMemPerNode.   MaxMemPerCPU  and  MaxMemPerNode  are  mutually
              exclusive.

       MaxMemPerNode
              Maximum  real  memory  size  available  per  allocated  node  in
              MegaBytes.   Used  to  avoid over-subscribing memory and causing
              paging.  MaxMemPerNode would generally be used  if  whole  nodes
              are  alocated  to  jobs (SelectType=select/linear) and resources
              are shared (Shared=yes or Shared=force).  The default value is 0
              (unlimited).    Also   see   DefMemPerNode   and   MaxMemPerCPU.
              MaxMemPerCPU and MaxMemPerNode are mutually exclusive.

       MessageTimeout
              Time permitted for a round-trip  communication  to  complete  in
              seconds.  Default  value  is 10 seconds. For systems with shared
              nodes, the slurmd daemon could  be  paged  out  and  necessitate
              higher values.

       MinJobAge
              The  minimum  age of a completed job before its record is purged
              from SLURM’s active database. Set the values of MaxJobCount  and
              MinJobAge  to  insure  the slurmctld daemon does not exhaust its
              memory or other resources. The default value is 300 seconds.   A
              value  of  zero prevents any job record purging.  May not exceed
              65533.

       MpiDefault
              Identifies the default  type  of  MPI  to  be  used.   Srun  may
              override  this  configuration  parameter in any case.  Currently
              supported versions include:  mpichgm,  mvapich,  none  (default,
              which works for many other versions of MPI including LAM MPI and
              Open MPI).

       PluginDir
              Identifies the places in which to look for SLURM plugins.   This
              is   a  colon-separated  list  of  directories,  like  the  PATH
              environment     variable.      The     default     value      is
              "/usr/local/lib/slurm".

       PlugStackConfig
              Location of the config file for SLURM stackable plugins that use
              the  Stackable  Plugin  Architecture  for  Node  job  (K)control
              (SPANK).  This provides support for a highly configurable set of
              plugins to be called before and/or after execution of each  task
              spawned  as  part  of  a  user’s  job step.  Default location is
              "plugstack.conf" in the same directory as the system slurm.conf.
              For  more information on SPANK plugins, see the spank(8) manual.

       PrivateData
              This controls what type of information is  hidden  from  regular
              users.   By  default,  all  information is visible to all users.
              User  SlurmUser  and  root  can  always  view  all  information.
              Multiple  values  may  be  specified  with  a  comma  separator.
              Acceptable values include:

              jobs prevents users from viewing jobs or job steps belonging
                     to other users.

              nodes prevents users from viewing node state information.

              partitions  prevents  users   from   viewing   partition   state
              information.

       ProctrackType
              Identifies the plugin to be  used  for  process  tracking.   The
              slurmd  daemon  uses  this  mechanism  to identify all processes
              which are children of processes it spawns for a user  job.   The
              slurmd daemon must be restarted for a change in ProctrackType to
              take effect.  NOTE: "proctrack/linuxproc"  and  "proctrack/pgid"
              can  fail  to identify all processes associated with a job since
              processes can become a child  of  the  init  process  (when  the
              parent  process  terminates)  or change their process group.  To
              reliably track  all  processes,  one  of  the  other  mechanisms
              utilizing    kernel    modifications   is   preferable.    NOTE:
              "proctrack/linuxproc"  is  not  compatible  with  "switch/elan."
              Acceptable values at present include:

              proctrack/aix which uses an AIX kernel extension and is
                     the default for AIX systems

              proctrack/linuxproc which uses linux process tree using
                     parent process IDs

              proctrack/rms which uses Quadrics kernel patch and is the
                     default if "SwitchType=switch/elan"

              proctrack/sgi_job which uses SGI’s Process Aggregates (PAGG)
                     kernel  module, see http://oss.sgi.com/projects/pagg/ for
                     more information

              proctrack/pgid which uses process group IDs and is the
                     default for all other systems

       Prolog Fully qualified pathname of a script for the slurmd  to  execute
              whenever  it  is  asked  to  run  a  job  step  from  a  new job
              allocation.   (e.g.   "/usr/local/slurm/prolog").   The   slurmd
              executes  the  script before starting the job step.  This may be
              used to purge files, enable user login, etc.  By  default  there
              is  no  prolog.  Any  configured  script is expected to complete
              execution quickly (in less time than MessageTimeout).

              NOTE:  The Prolog script is ONLY run on any individual node when
              it  first sees a job step from a new allocation; it does not run
              the Prolog immediately when an allocation is granted.  If no job
              steps  from  an  allocation are run on a node, it will never run
              the Prolog for that allocation.  The Epilog, on the other  hand,
              always  runs  on every node of an allocation when the allocation
              is released.

       PropagatePrioProcess
              Setting PropagatePrioProcess to "1", will cause a users  job  to
              run with the same priority (aka nice value) as the users process
              which launched the job on the submit node.  If set  to  "0",  or
              left  unset,  the users job will inherit the scheduling priority
              from the slurm daemon.

       PropagateResourceLimits
              A list of comma separated  resource  limit  names.   The  slurmd
              daemon  uses  these  names to obtain the associated (soft) limit
              values from the users process environment on  the  submit  node.
              These  limits  are  then propagated and applied to the jobs that
              will run on the compute nodes.  This  parameter  can  be  useful
              when  system  limits vary among nodes.  Any resource limits that
              do not appear in the list are not propagated.  However, the user
              can  override  this  by  specifying  which  resource  limits  to
              propagate with  the  srun  commands  "--propagate"  option.   If
              neither   of  the  ’propagate  resource  limit’  parameters  are
              specified, then the default action is to propagate  all  limits.
              Only  one  of  the parameters, either PropagateResourceLimits or
              PropagateResourceLimitsExcept, may be specified.  The  following
              limit  names  are  supported by Slurm (although some options may
              not be supported on some systems):

              ALL       All limits listed below

              AS        The maximum address space for a processes

              CORE      The maximum size of core file

              CPU       The maximum amount of CPU time

              DATA      The maximum size of a process’s data segment

              FSIZE     The maximum size of files created

              MEMLOCK   The maximum size that may be locked into memory

              NOFILE    The maximum number of open files

              NPROC     The maximum number of processes available

              RSS       The maximum resident set size

              STACK     The maximum stack size

       PropagateResourceLimitsExcept
              A list of comma separated resource limit names.  By default, all
              resource  limits  will  be  propagated,  (as  described  by  the
              PropagateResourceLimits  parameter),  except  for   the   limits
              appearing  in  this  list.    The  user  can  override  this  by
              specifying which resource limits  to  propagate  with  the  srun
              commands   "--propagate"  option.   See  PropagateResourceLimits
              above for a list of valid limit names.

       ResumeProgram
              SLURM supports a mechanism to reduce power consumption on  nodes
              that  remain  idle  for  an  extended  period  of time.  This is
              typically  accomplished  by  reducing  voltage  and   frequency.
              ResumeProgram  is  the program that will be executed when a node
              in power save mode is assigned work  to  perform.   The  program
              executes  as SlurmUser.  The argument to the program will be the
              names of nodes to be removed  from  power  savings  mode  (using
              SLURM’s  hostlist  expression format).  By default no program is
              run.   Related   configuration   options   include   ResumeRate,
              SuspendRate,  SuspendTime,  SuspendProgram, SuspendExcNodes, and
              SuspendExcParts.  More information is available at the SLURM web
              site (https://computing.llnl.gov/linux/slurm/power_save.html).

       ResumeRate
              The  rate  at  which  nodes  in  power save mode are returned to
              normal operation by ResumeProgram.  The value is number of nodes
              per minute and it can be used to prevent power surges if a large
              number of nodes in power save mode are assigned work at the same
              time  (e.g.  a large job starts).  A value of zero results in no
              limits being imposed.  The default value is 60 nodes per minute.
              Related    configuration    options    include    ResumeProgram,
              SuspendRate, SuspendTime, SuspendProgram,  SuspendExcNodes,  and
              SuspendExcParts.

       ReturnToService
              If  set  to  1,  then  a  non-responding (DOWN) node will become
              available for use upon registration. Note that DOWN node’s state
              will   be  changed  only  if  it  was  set  DOWN  due  to  being
              non-responsive. If the node was set DOWN for  any  other  reason
              (low  memory,  prolog  failure, epilog failure, etc.), its state
              will not automatically be changed.   The  default  value  is  0,
              which  means  that  a node will remain in the DOWN state until a
              system administrator explicitly changes its state (even  if  the
              slurmd daemon registers and resumes communications).

       SchedulerPort
              The  port number on which slurmctld should listen for connection
              requests.  This value is only used by the  Maui  Scheduler  (see
              SchedulerType).  The default value is 7321.

       SchedulerRootFilter
              Identifies whether or not RootOnly partitions should be filtered
              from any external scheduling  activities.  If  set  to  0,  then
              RootOnly partitions are treated like any other partition. If set
              to 1, then RootOnly partitions  are  exempt  from  any  external
              scheduling  activities.  The  default value is 1. Currently only
              used by the built-in backfill scheduling module "sched/backfill"
              (see SchedulerType).

       SchedulerTimeSlice
              Number     of     seconds    in    each    time    slice    when
              SchedulerType=sched/gang.  The default value is 30.

       SchedulerType
              Identifies the type of scheduler to be used.  Acceptable  values
              include   "sched/builtin"   for  the  built-in  FIFO  scheduler,
              "sched/backfill" for a backfill scheduling module to augment the
              default   FIFO   scheduling,  "sched/gang"  for  gang  scheduler
              (time-slicing of parallel jobs), "sched/hold" to hold all  newly
              arriving  jobs  if a file "/etc/slurm.hold" exists otherwise use
              the built-in FIFO  scheduler,  and  "sched/wiki"  for  the  Wiki
              interface   to   the  Maui  Scheduler.   The  default  value  is
              "sched/builtin".     Backfill    scheduling    will     initiate
              lower-priority  jobs  if  doing  so  does not delay the expected
              initiation time of any higher  priority  job.   Note  that  this
              backfill  scheduler implementation is relatively simple. It does
              not support partitions configured to  to  share  resources  (run
              multiple  jobs  on  the  same  nodes) or support jobs requesting
              specific  nodes.   When   initially   setting   the   value   to
              "sched/wiki",  any  pending jobs must have their priority set to
              zero (held).  When changing the  value  from  "sched/wiki",  all
              pending jobs should have their priority change from zero to some
              large number.  The scontrol command can be used  to  change  job
              priorities.  The slurmctld daemon must be restarted for a change
              in scheduler type to become effective.

       SelectType
              Identifies the type of resource selection algorithm to be  used.
              Acceptable values include

              select/linear
                     for allocation of entire nodes assuming a one-dimensional
                     array of nodes in which sequentially  ordered  nodes  are
                     preferable.   This  is the default value for non-BlueGene
                     systems.

              select/cons_res
                     The resources within a node are individually allocated as
                     consumable  resources.   Note  that  whole  nodes  can be
                     allocated to jobs for selected partitions  by  using  the
                     Shared=Exclusive   option.    See  the  partition  Shared
                     parameter for more information.

              select/bluegene
                     for a three-dimensional  BlueGene  system.   The  default
                     value is "select/bluegene" for BlueGene systems.

       SelectTypeParameters
              The  permitted  values  of  SelectTypeParameters depend upon the
              configured  value  of  SelectType.    SelectType=select/bluegene
              supports no SelectTypeParameters.  The only supported option for
              SelectType=select/linear is CR_Memory, which treats memory as  a
              consumable  resource  and prevents memory over subscription with
              job preemption or gang scheduling.   The  following  values  are
              supported for SelectType=select/cons_res:

              CR_CPU CPUs  are  consumable  resources.   There is no notion of
                     sockets, cores or threads.  On a multi-core system,  each
                     core  will  be  considered  a  CPU.   On a multi-core and
                     hyperthreaded system, each thread will  be  considered  a
                     CPU.    On   single-core   systems,  each  CPUs  will  be
                     considered a CPU.

              CR_CPU_Memory
                     CPUs and memory  are  consumable  resources.   Setting  a
                     value for DefMemPerCPU is strongly recommended.

              CR_Core
                     Cores are consumable resources.

              CR_Core_Memory
                     Cores  and  memory  are  consumable resources.  Setting a
                     value for DefMemPerCPU is strongly recommended.

              CR_Socket
                     Sockets are consumable resources.

              CR_Socket_Memory
                     Memory and CPUs  are  consumable  resources.   Setting  a
                     value for DefMemPerCPU is strongly recommended.

              CR_Memory
                     Memory  is  a  consumable  resource.   NOTE: This implies
                     Shared=YES or Shared=FORCE for all partitions.  Setting a
                     value for DefMemPerCPU is strongly recommended.

       SlurmUser
              The name of the user that the slurmctld daemon executes as.  For
              security purposes, a user  other  than  "root"  is  recommended.
              This   user   must  exist  on  all  nodes  of  the  cluster  for
              authentication of communications between SLURM components.   The
              default value is "root".

       SlurmctldDebug
              The  level of detail to provide slurmctld daemon’s logs.  Values
              from 0 to 7 are legal, with ‘0’ being "quiet" operation and  ‘7’
              being insanely verbose.  The default value is 3.

       SlurmctldLogFile
              Fully  qualified  pathname  of  a  file into which the slurmctld
              daemon’s logs are written.  The default value is none  (performs
              logging via syslog).

       SlurmctldPidFile
              Fully  qualified  pathname  of  a file into which the  slurmctld
              daemon may write its process id. This may be used for  automated
              signal      processing.       The      default      value     is
              "/var/run/slurmctld.pid".

       SlurmctldPort
              The port number that the SLURM controller, slurmctld, listens to
              for  work. The default value is SLURMCTLD_PORT as established at
              system build time. If none is explicitly specified, it  will  be
              set to 6817.  NOTE: Either slurmctld and slurmd daemons must not
              execute on the same nodes or the  values  of  SlurmctldPort  and
              SlurmdPort must be different.

       SlurmctldTimeout
              The  interval,  in seconds, that the backup controller waits for
              the primary controller to respond before assuming control.   The
              default value is 120 seconds.  May not exceed 65533.

       SlurmdDebug
              The  level  of  detail  to provide slurmd daemon’s logs.  Values
              from 0 to 7 are legal, with ‘0’ being "quiet" operation and  ‘7’
              being insanely verbose.  The default value is 3.

       SlurmdLogFile
              Fully  qualified  pathname  of  a  file  into  which the  slurmd
              daemon’s logs are written.  The default value is none  (performs
              logging  via syslog).  Any "%h" within the name is replaced with
              the hostname on which the slurmd is running.

       SlurmdPidFile
              Fully qualified pathname of a file into which the  slurmd daemon
              may  write its process id. This may be used for automated signal
              processing.  The default value is "/var/run/slurmd.pid".

       SlurmdPort
              The port number that the  SLURM  compute  node  daemon,  slurmd,
              listens  to  for  work.  The  default  value  is  SLURMD_PORT as
              established  at  system  build  time.  If  none  is   explicitly
              specified,  its  value will be 6818.  NOTE: Either slurmctld and
              slurmd daemons must not execute on the same nodes or the  values
              of SlurmctldPort and SlurmdPort must be different.

       SlurmdSpoolDir
              Fully  qualified  pathname  of a directory into which the slurmd
              daemon’s state information and batch job script information  are
              written.  This  must  be  a  common  pathname for all nodes, but
              should represent  a  directory  which  is  local  to  each  node
              (reference   a   local   file  system).  The  default  value  is
              "/var/spool/slurmd." NOTE: This directory is also used to  store
              slurmd’s  shared  memory  lockfile,  and  should  not be changed
              unless the system is being cleanly restarted. If the location of
              SlurmdSpoolDir  is  changed  and  slurmd  is  restarted, the new
              daemon will attach to a different shared memory region and  lose
              track of any running jobs.

       SlurmdTimeout
              The  interval,  in  seconds, that the SLURM controller waits for
              slurmd to respond before configuring that node’s state to  DOWN.
              The default value is 300 seconds.  A value of zero indicates the
              node will not be tested by slurmctld to  confirm  the  state  of
              slurmd,  the  node will not be automatically set to a DOWN state
              indicating a non-responsive slurmd, and  some  other  tool  will
              take  responsibility  for  monitoring  the state of each compute
              node and its slurmd daemon.  The value may not exceed 65533.

       SrunEpilog
              Fully qualified pathname of an executable  to  be  run  by  srun
              following  the  completion  of  a  job  step.   The command line
              arguments for the executable will be the command  and  arguments
              of the job step.  This configuration parameter may be overridden
              by srun’s --epilog parameter.

       SrunProlog
              Fully qualified pathname of an executable  to  be  run  by  srun
              prior  to  the launch of a job step.  The command line arguments
              for the executable will be the command and arguments of the  job
              step.   This configuration parameter may be overridden by srun’s
              --prolog parameter.

       StateSaveLocation
              Fully qualified pathname of a directory  into  which  the  SLURM
              controller,     slurmctld,     saves     its     state     (e.g.
              "/usr/local/slurm/checkpoint").  SLURM state will saved here  to
              recover  from system failures.  SlurmUser must be able to create
              files  in  this  directory.   If  you  have  a  BackupController
              configured,  this  location  should  be readable and writable by
              both systems.  Since all running and pending job information  is
              stored  here,  the  use of a reliable file system (e.g. RAID) is
              recommended.  The default value is "/tmp".  If any slurm daemons
              terminate abnormally, their core files will also be written into
              this directory.

       SuspendExcNodes
              Specifies the nodes which are to not be  placed  in  power  save
              mode,  even  if  the node remains idle for an extended period of
              time.  Use SLURM’s hostlist expression to  identify  nodes.   By
              default  no  nodes  are excluded.  Related configuration options
              include ResumeProgram, ResumeRate, SuspendProgram,  SuspendRate,
              SuspendTime and SuspendExcParts.

       SuspendExcParts
              Specifies  the  partitions  whose  nodes are to not be placed in
              power save mode, even if the node remains idle for  an  extended
              period  of  time.   Multiple  partitions  can  be identified and
              separated by commas.  By default no nodes are excluded.  Related
              configuration   options   include   ResumeProgram,   ResumeRate,
              SuspendProgram, SuspendRate, SuspendTime and SuspendExcNodes.

       SuspendProgram
              SuspendProgram is the program that will be executed when a  node
              remains  idle  for  an extended period of time.  This program is
              expected to place the node  into  some  power  save  mode.   The
              program executes as SlurmUser.  The argument to the program will
              be the names of nodes to  be  placed  into  power  savings  mode
              (using  SLURM’s  hostlist  expression  format).   By  default no
              program  is  run.    Related   configuration   options   include
              ResumeProgram,     ResumeRate,     SuspendRate,     SuspendTime,
              SuspendExcNodes, and SuspendExcParts.

       SuspendRate
              The rate at which nodes  are  place  into  power  save  mode  by
              SuspendProgram.   The value is number of nodes per minute and it
              can be used to prevent a large drop in power  power  consumption
              (e.g.  after a large job completes).  A value of zero results in
              no limits being imposed.  The default  value  is  60  nodes  per
              minute.   Related  configuration  options include ResumeProgram,
              ResumeRate, SuspendProgram,  SuspendTime,  SuspendExcNodes,  and
              SuspendExcParts.

       SuspendTime
              Nodes  which  remain  idle  for  this  number of seconds will be
              placed into power save mode by SuspendProgram,  A  value  of  -1
              disables   power   save   mode  and  is  the  default.   Related
              configuration   options   include   ResumeProgram,   ResumeRate,
              SuspendProgram,      SuspendRate,      SuspendExcNodes,      and
              SuspendExcParts.

       SwitchType
              Identifies  the  type  of  switch  or  interconnect   used   for
              application    communications.     Acceptable   values   include
              "switch/none" for switches not requiring special processing  for
              job  launch  or termination (Myrinet, Ethernet, and InfiniBand),
              "switch/elan" for Quadrics Elan 3 or Elan 4  interconnect.   The
              default value is "switch/none".  All SLURM daemons, commands and
              running jobs must be restarted for a  change  in  SwitchType  to
              take  effect.   If  running  jobs exist at the time slurmctld is
              restarted with a new value of SwitchType, records of all jobs in
              any state may be lost.

       TaskEpilog
              Fully qualified pathname of a program to be execute as the slurm
              job’s owner after termination of each task.  See TaskPlugin  for
              execution order details.

       TaskPlugin
              Identifies  the  type  of  task launch plugin, typically used to
              provide resource management within a node (e.g. pinning tasks to
              specific processors).  Acceptable values include "task/none" for
              systems requiring no special  handling  and  "task/affinity"  to
              enable  the  --cpu_bind  and/or  --mem_bind  srun  options.  The
              default  value  is  "task/none".   If  you  "task/affinity"  and
              encounter problems, it may be due to the variety of system calls
              used to implement task affinity on different operating  systems.
              If  that is the case, you may want to use Portable Linux Process
              Affinity  (PLPA,   see   http://www.open-mpi.org/software/plpa),
              which  is  supported  by SLURM.  The order of task prolog/epilog
              execution is as follows:

              1. pre_launch(): function in TaskPlugin

              2.  TaskProlog:  system-wide  per  task   program   defined   in
              slurm.conf

              3. user prolog: job step specific task program defined using
                     srun’s   --task-prolog   option   or    SLURM_TASK_PROLOG
                     environment variable

              4. Execute the job step’s task

              5. user epilog: job step specific task program defined using
                     srun’s    --task-epilog   option   or   SLURM_TASK_EPILOG
                     environment variable

              6.  TaskEpilog:  system-wide  per  task   program   defined   in
              slurm.conf

              7. post_term(): function in TaskPlugin

       TaskPluginParam
              Optional parameters for the task plugin.

              Cpusets   Use cpusets to perform task affinity functions

              Sched     Use sched_setaffinity  or  plpa_sched_setaffinity  (if
                        available)  to  bind tasks to processors.  This is the
                        default  mode  of  operation  is  no  parameters   are
                        specified.

       TaskProlog
              Fully qualified pathname of a program to be execute as the slurm
              job’s owner prior to  initiation  of  each  task.   Besides  the
              normal  environment variables, this has SLURM_TASK_PID available
              to identify the process ID of the task being started.   Standard
              output from this program of the form "export NAME=value" will be
              used to set environment variables for the  task  being  spawned.
              See TaskPlugin for execution order details.

       TmpFS  Fully  qualified  pathname  of the file system available to user
              jobs  for  temporary  storage.  This  parameter   is   used   in
              establishing  a  node’s  TmpDisk  space.   The  default value is
              "/tmp".

       TreeWidth
              Slurmd daemons use a virtual tree  network  for  communications.
              TreeWidth  specifies  the  width  of the tree (i.e. the fanout).
              The  default  value  is  50,  meaning  each  slurmd  daemon  can
              communicate  with  up  to  50 other slurmd daemons and over 2500
              nodes can be contacted with two message hops.  The default value
              will  work  well  for most clusters.  Optimal system performance
              can typically be achieved if TreeWidth is set to the square root
              of the number of nodes in the cluster for systems having no more
              than 2500 nodes or the cube root for larger systems.

       UnkillableStepProgram
              If the processes in a job step are determined to  be  unkillable
              for  a  period  of  time  specified by the UnkillableStepTimeout
              variable, the program  specified  by  the  UnkillableStepProgram
              string  will  be  executed.   This  program  can be used to take
              special actions to  clean  up  the  unkillable  processes.   The
              program  will  be  run  as  the same user as the slurmd (usually
              "root").

       UnkillableStepTimeout
              The length of time, in seconds,  that  SLURM  will  wait  before
              deciding that processes in a job step are unkillable (after they
              have been signaled with SIGKILL).  The default timeout value  is
              60 seconds.

       UsePAM If  set  to  1, PAM (Pluggable Authentication Modules for Linux)
              will be enabled.  PAM is used to establish the upper bounds  for
              resource   limits.   With  PAM  support  enabled,  local  system
              administrators can dynamically configure system resource limits.
              Changing  the upper bound of a resource limit will not alter the
              limits of running jobs, only jobs started  after  a  change  has
              been  made  will pick up the new limits.  The default value is 0
              (not to enable PAM support).  Remember that PAM also needs to be
              configured to support SLURM as a service.  For sites using PAM’s
              directory based configuration option, a configuration file named
              slurm  should  be  created.  The module-type, control-flags, and
              module-path names that should be included in the file are:
              auth        required      pam_localuser.so
              auth        required      pam_shells.so
              account     required      pam_unix.so
              account     required      pam_access.so
              session     required      pam_unix.so
              For sites configuring PAM with a general configuration file, the
              appropriate  lines (see above), where slurm is the service-name,
              should be added.

       WaitTime
              Specifies how many seconds the srun command  should  by  default
              wait  after  the  first  task  terminates before terminating all
              remaining tasks. The "--wait" option on the  srun  command  line
              overrides  this  value.   If set to 0, this feature is disabled.
              May not exceed 65533.

       The configuration of nodes (or machines) to be managed by Slurm is also
       specified  in  /etc/slurm.conf.   Changes  in  node configuration (e.g.
       adding nodes, changing their processor count, etc.) require  restarting
       the  slurmctld  daemon.   Only  the  NodeName  must  be supplied in the
       configuration  file.   All  other  node  configuration  information  is
       optional.   It  is advisable to establish baseline node configurations,
       especially if the cluster is heterogeneous.  Nodes  which  register  to
       the  system  with  less  than the configured resources (e.g. too little
       memory), will be placed in the "DOWN" state to avoid scheduling jobs on
       them.   Establishing  baseline  configurations  will also speed SLURM’s
       scheduling process by permitting it to compare job requirements against
       these  (relatively  few)  configuration  parameters  and possibly avoid
       having to  check  job  requirements  against  every  individual  node’s
       configuration.   The  resources  checked at node registration time are:
       Procs, RealMemory and TmpDisk.  While baseline values for each of these
       can  be  established  in the configuration file, the actual values upon
       node registration are recorded and these actual values may be used  for
       scheduling  purposes  (depending  upon the value of FastSchedule in the
       configuration file.

       Default values can be specified with a record in  which  "NodeName"  is
       "DEFAULT".  The default entry values will apply only to lines following
       it in the configuration file  and  the  default  values  can  be  reset
       multiple  times  in  the configuration file with multiple entries where
       "NodeName=DEFAULT".  The "NodeName=" specification must  be  placed  on
       every  line  describing  the  configuration  of  nodes.  In fact, it is
       generally possible and desirable to define the  configurations  of  all
       nodes  in  only  a  few  lines.   This  convention  permits significant
       optimization in the scheduling of larger clusters.  In order to support
       the  concept of jobs requiring consecutive nodes on some architectures,
       node specifications should be place in this file in consecutive  order.
       No  single  node name may be listed more than once in the configuration
       file.  Use  "DownNodes="  to  record  the  state  of  nodes  which  are
       temporarily  in  a  DOWN,  DRAIN  or  FAILING  state  without  altering
       permanent configuration information.  A job step’s tasks are  allocated
       to  nodes in order the nodes appear in the configuration file. There is
       presently no capability within SLURM to arbitrarily order a job  step’s
       tasks.

       Multiple  node  names  may be comma separated (e.g. "alpha,beta,gamma")
       and/or a simple node range expression may optionally be used to specify
       numeric  ranges  of  nodes  to avoid building a configuration file with
       large numbers of entries.  The node range expression  can  contain  one
       pair  of  square  brackets  with  a sequence of comma separated numbers
       and/or ranges of numbers separated by a "-" (e.g. "linux[0-64,128]", or
       "lx[15,18,32-33]").   Note  that  the numeric ranges can include one or
       more leading zeros to indicate the numeric portion has a  fixed  number
       of digits (e.g. "linux[0000-1023]").

       On  BlueGene  systems only, the square brackets should contain pairs of
       three digit numbers separated by a "x".   These  numbers  indicate  the
       boundaries  of  a rectangular prism (e.g. "bgl[000x144,400x544]").  See
       BlueGene documentation for more details.  Presently the  numeric  range
       must be the last characters in the node name (e.g. "unit[0-31]rack1" is
       invalid).  The node configuration specified the following information:

       NodeName
              Name that SLURM uses to refer to a node (or base  partition  for
              BlueGene  systems).   Typically  this  would  be the string that
              "/bin/hostname -s" returns.  It may also be the fully  qualified
              domain   name   as   returned   by   "/bin/hostname   -f"  (e.g.
              "foo1.bar.com"), or any valid domain name  associated  with  the
              host through the host database (/etc/hosts) or DNS, depending on
              the resolver settings.  Note that  if  the  short  form  of  the
              hostname is not used, it may prevent use of hostlist expressions
              (the numeric portion in brackets must  be  at  the  end  of  the
              string).   Only  short  hostname  forms  are compatible with the
              switch/elan and switch/federation plugins at this time.  It  may
              also  be  an  arbitrary string if NodeHostname is specified.  If
              the NodeName is "DEFAULT", the values specified with that record
              will  apply  to subsequent node specifications unless explicitly
              set to other values in that  node  record  or  replaced  with  a
              different set of default values.  For architectures in which the
              node order is significant, nodes will be considered  consecutive
              in  the  order  defined.   For example, if the configuration for
              "NodeName=charlie" immediately  follows  the  configuration  for
              "NodeName=baker"   they  will  be  considered  adjacent  in  the
              computer.

       NodeHostname
              Typically this would  be  the  string  that  "/bin/hostname  -s"
              returns.   It  may  also  be  the fully qualified domain name as
              returned by "/bin/hostname -f"  (e.g.  "foo1.bar.com"),  or  any
              valid  domain  name  associated  with  the host through the host
              database  (/etc/hosts)  or  DNS,  depending  on   the   resolver
              settings.   Note  that  if the short form of the hostname is not
              used, it may prevent use of hostlist  expressions  (the  numeric
              portion  in  brackets  must  be at the end of the string).  Only
              short hostname forms are compatible  with  the  switch/elan  and
              switch/federation plugins at this time.  A node range expression
              can be used to specify a set of  nodes.   If  an  expression  is
              used,  the  number of nodes identified by NodeHostname on a line
              in the configuration file must be identical  to  the  number  of
              nodes identified by NodeName.  By default, the NodeHostname will
              be identical in value to NodeName.

       NodeAddr
              Name that a  node  should  be  referred  to  in  establishing  a
              communications  path.   This name will be used as an argument to
              the gethostbyname() function  for  identification.   If  a  node
              range  expression is used to designate multiple nodes, they must
              exactly   match   the   entries   in    the    NodeName    (e.g.
              "NodeName=lx[0-7]   NodeAddr="elx[0-7]").    NodeAddr  may  also
              contain  IP  addresses.   By  default,  the  NodeAddr  will   be
              identical in value to NodeName.

       CoresPerSocket
              Number  of  cores  in  a  single physical processor socket (e.g.
              "2").  The CoresPerSocket value describes  physical  cores,  not
              the  logical number of processors per socket.  NOTE: If you have
              multi-core processors, you will  likely  need  to  specify  this
              parameter in order to optimize scheduling.  The default value is
              1.

       Feature
              A comma delimited list of arbitrary strings indicative  of  some
              characteristic  associated  with  the  node.   There is no value
              associated with a feature at this time,  a  node  either  has  a
              feature  or  it  does  not.   If desired a feature may contain a
              numeric component indicating, for example, processor speed.   By
              default a node has no features.

       Procs  Number  of  logical processors on the node (e.g. "2").  If Procs
              is omitted, it will be inferred  from  Sockets,  CoresPerSocket,
              and ThreadsPerCore.  The default value is 1.

       RealMemory
              Size of real memory on the node in MegaBytes (e.g. "2048").  The
              default value is 1.

       Reason Identifies  the  reason  for  a  node  being  in  state  "DOWN",
              "DRAINED"  "DRAINING",  "FAIL"  or  "FAILING".   Use  quotes  to
              enclose a reason having more than one word.

       Sockets
              Number of physical processor sockets/chips  on  the  node  (e.g.
              "2").   If  Sockets  is omitted, it will be inferred from Procs,
              CoresPerSocket,  and  ThreadsPerCore.    NOTE:   If   you   have
              multi-core  processors,  you  will  likely need to specify these
              parameters.  The default value is 1.

       State  State of the node with respect to the initiation of  user  jobs.
              Acceptable  values  are  "DOWN",  "DRAIN", "FAIL", "FAILING" and
              "UNKNOWN".  "DOWN" indicates the node failed and is  unavailable
              to be allocated work.  "DRAIN" indicates the node is unavailable
              to be allocated work.  "FAIL" indicates the node is expected  to
              fail  soon,  has  no  jobs  allocated  to  it,  and  will not be
              allocated to any new jobs.   "FAILING"  indicates  the  node  is
              expected to fail soon, has one or more jobs allocated to it, but
              will not be allocated to any new jobs.  "UNKNOWN" indicates  the
              node’s   state   is  undefined  (BUSY  or  IDLE),  but  will  be
              established when the slurmd daemon on that node registers.   The
              default  value  is  "UNKNOWN".  Also see the DownNodes parameter
              below.

       ThreadsPerCore
              Number of logical threads in a single physical core (e.g.  "2").
              The default value is 1.

       TmpDisk
              Total size of temporary disk storage in TmpFS in MegaBytes (e.g.
              "16384"). TmpFS (for "Temporary  File  System")  identifies  the
              location which jobs should use for temporary storage.  Note this
              does not indicate the amount of free space available to the user
              on  the  node,  only  the  total  file  system  size. The system
              administration should insure  this  file  system  is  purged  as
              needed so that user jobs have access to most of this space.  The
              Prolog and/or Epilog programs (specified  in  the  configuration
              file)  might  be  used  to insure the file system is kept clean.
              The default value is 0.

       Weight The priority of the node for scheduling  purposes.   All  things
              being  equal,  jobs  will be allocated the nodes with the lowest
              weight which  satisfies  their  requirements.   For  example,  a
              heterogeneous  collection of nodes might be placed into a single
              partition for greater  system  utilization,  responsiveness  and
              capability.  It  would  be preferable to allocate smaller memory
              nodes rather than larger memory nodes if either will  satisfy  a
              job’s  requirements.   The  units  of  weight are arbitrary, but
              larger weights should be assigned to nodes with more processors,
              memory, disk space, higher processor speed, etc.  Note that if a
              job allocation request can not be satisfied using the nodes with
              the  lowest weight, the set of nodes with the next lowest weight
              is added to the set of nodes under consideration for use (repeat
              as  needed  for higher weight values). If you absolutely want to
              minimize the number of higher weight nodes allocated  to  a  job
              (at  a  cost  of  higher  scheduling overhead), give each node a
              distinct Weight value and they will be  added  to  the  pool  of
              nodes being considered for scheduling individually.  The default
              value is 1.

       The "DownNodes=" configuration permits you to mark certain nodes as  in
       a  DOWN,  DRAIN,  FAIL, or FAILING state without altering the permanent
       configuration information listed under a "NodeName=" specification.

       DownNodes
              Any node name, or list  of  node  names,  from  the  "NodeName="
              specifications.

       Reason Identifies the reason for a node being in state "DOWN", "DRAIN",
              "FAIL" or "FAILING.  Use quotes to enclose a reason having  more
              than one word.

       State  State  of  the node with respect to the initiation of user jobs.
              Acceptable values are "BUSY", "DOWN", "DRAIN", "FAIL", "FAILING,
              "IDLE",  and "UNKNOWN".  "DOWN" indicates the node failed and is
              unavailable to be allocated work.  "DRAIN" indicates the node is
              unavailable  to be allocated work.  "FAIL" indicates the node is
              expected to fail soon, has no jobs allocated to it, and will not
              be  allocated  to any new jobs.  "FAILING" indicates the node is
              expected to fail soon, has one or more jobs allocated to it, but
              will  not be allocated to any new jobs.  "UNKNOWN" indicates the
              node’s  state  is  undefined  (BUSY  or  IDLE),  but   will   be
              established  when the slurmd daemon on that node registers.  The
              default value is "UNKNOWN".

       The partition configuration permits  you  to  establish  different  job
       limits  or access controls for various groups (or partitions) of nodes.
       Nodes may be in more than one partition,  making  partitions  serve  as
       general  purpose queues.  For example one may put the same set of nodes
       into two different partitions, each with  different  constraints  (time
       limit, job sizes, groups allowed to use the partition, etc.).  Jobs are
       allocated resources within a single partition.  Default values  can  be
       specified  with  a  record  in which "PartitionName" is "DEFAULT".  The
       default entry values will apply only  to  lines  following  it  in  the
       configuration  file  and the default values can be reset multiple times
       in   the   configuration   file    with    multiple    entries    where
       "PartitionName=DEFAULT".   The  "PartitionName="  specification must be
       placed on every line describing the configuration of partitions.  NOTE:
       Put  all  parameters for each partition on a single line.  Each line of
       partition  configuration  information  should  represent  a   different
       partition.   The  partition  configuration  file contains the following
       information:

       AllowGroups
              Comma separated list of group IDs which may execute jobs in  the
              partition.   If  at  least  one  group  associated with the user
              attempting to execute the job is  in  AllowGroups,  he  will  be
              permitted to use this partition.  Jobs executed as user root can
              use any partition without regard to the  value  of  AllowGroups.
              If  user  root  attempts  to execute a job as another user (e.g.
              using srun’s --uid option), this other user must be  in  one  of
              groups  identified  by  AllowGroups  for the job to successfully
              execute.  The default value is "ALL".

       Default
              If this keyword is  set,  jobs  submitted  without  a  partition
              specification  will utilize this partition.  Possible values are
              "YES" and "NO".  The default value is "NO".

       DisableRootJobs
              If set to "YES" then user root will be  prevented  from  running
              any jobs on this partition.  The default value will be the value
              of DisableRootJobs set  outside  of  a  partition  specification
              (which is "NO", allowing user root to execute jobs).

       Hidden Specifies  if  the  partition  and  its jobs are to be hidden by
              default.  Hidden partitions will by default not be  reported  by
              the SLURM APIs or commands.  Possible values are "YES" and "NO".
              The default value is "NO".

       MaxNodes
              Maximum count of nodes (or base partitions for BlueGene systems)
              which  may be allocated to any single job.  The default value is
              "UNLIMITED", which is represented internally as -1.  This  limit
              does not apply to jobs executed by SlurmUser or user root.

       MaxTime
              Maximum   run   time   limit   for  jobs.   Format  is  minutes,
              minutes:seconds,       hours:minutes:seconds,        days-hours,
              days-hours:minutes,  days-hours:minutes:seconds  or "UNLIMITED".
              Time resolution is one minute and second values are  rounded  up
              to  the next minute.  This limit does not apply to jobs executed
              by SlurmUser or user root.

       MinNodes
              Minimum count of nodes (or base partitions for BlueGene systems)
              which  may be allocated to any single job.  The default value is
              1.  This limit does not apply to jobs executed by  SlurmUser  or
              user root.

       Nodes  Comma  separated  list of nodes (or base partitions for BlueGene
              systems) which are associated with this partition.   Node  names
              may   be  specified  using  the  node  range  expression  syntax
              described above. A blank list of nodes (i.e. "Nodes= ")  can  be
              used  if  one  wants a partition to exist, but have no resources
              (possibly on a temporary basis).

       PartitionName
              Name  by  which  the   partition   may   be   referenced   (e.g.
              "Interactive").   This  name  can  be  specified  by  users when
              submitting jobs.  If the PartitionName is "DEFAULT", the  values
              specified  with  that  record will apply to subsequent partition
              specifications unless explicitly set to  other  values  in  that
              partition  record  or  replaced  with a different set of default
              values.

       Priority
              Jobs submitted to a higher priority partition will be dispatched
              before pending jobs in lower priority partitions and if possible
              they will preempt running jobs from lower  priority  partitions.
              Note  that  a partition’s priority takes precedence over a job’s
              priority.  The value may not exceed 65533.

       RootOnly
              Specifies if only user ID zero (i.e.  user  root)  may  allocate
              resources  in  this  partition. User root may allocate resources
              for any other user, but the request must be  initiated  by  user
              root.   This  option can be useful for a partition to be managed
              by some external entity (e.g. a higher-level  job  manager)  and
              prevents  users  from  directly using those resources.  Possible
              values are "YES" and "NO".  The default value is "NO".

       Shared Controls the ability of the partition to execute more  than  one
              job  at  a time on each resource (node, socket or core depending
              upon the value of SelectTypeParameters).  If resources are to be
              shared,  avoiding  memory  over-subscription  is very important.
              SelectTypeParameters should be configured to treat memory  as  a
              consumable  resource and the --mem option should be used for job
              allocations.  For more information see the following  web  page:
              https://computing.llnl.gov/linux/slurm/cons_res_share.html.
              Possible values for Shared are "EXCLUSIVE", "FORCE", "YES", and
              "NO".

              EXCLUSIVE   Allocates   entire   nodes   to   jobs   even   with
                          select/cons_res configured.  This  can  be  used  to
                          allocate   whole   nodes   in  some  partitions  and
                          individual processors in other partitions.

              FORCE       Make all resources in the  partition  available  for
                          sharing  without  any means for users to disable it.
                          May be followed with a colon and maximum  number  of
                          jobs  in  running  or  suspended state.  For example
                          "Shared=FORCE:4" enables each node, socket  or  core
                          to  execute  up  to  four jobs at once.  Recommended
                          only for  BlueGene  systems  configured  with  small
                          blocks  or  for systems running with gang scheduling
                          (SchedulerType=sched/gang).

              YES         Make nodes in the partition available  for  sharing,
                          but  provides  the  user  with  a  means  of getting
                          dedicated resources.  If SelectType=select/cons_res,
                          then   resources   will  be  over-subscribed  unless
                          explicitly disabled in the job submit request  using
                          the        "--exclusive"        option.         With
                          SelectType=select/bluegene                        or
                          SelectType=select/linear,  resources  will  only  be
                          over-subscribed when  explicitly  requested  by  the
                          user  using  the "--share" option on job submission.
                          May be followed with a colon and maximum  number  of
                          jobs  in  running  or  suspended state.  For example
                          "Shared=YES:4" enables each node, socket or core  to
                          execute  up  to four jobs at once.  Recommended only
                          for   systems   running   with    gang    scheduling
                          (SchedulerType=sched/gang).

       State  State of partition or availability for use.  Possible values are
              "UP" or "DOWN". The default value is "UP".

RELOCATING CONTROLLERS

       If the cluster’s computers used for the primary  or  backup  controller
       will  be  out  of  service  for  an  extended period of time, it may be
       desirable to relocate them.  In order to do so, follow this procedure:

       1. Stop the SLURM daemons
       2. Modify the slurm.conf file appropriately
       3. Distribute the updated slurm.conf file to all nodes
       4. Restart the SLURM daemons

       There should be no loss of any running or pending  jobs.   Insure  that
       any  nodes  added  to  the  cluster  have  the  current slurm.conf file
       installed.

       CAUTION: If two nodes are  simultaneously  configured  as  the  primary
       controller  (two  nodes  on which ControlMachine specify the local host
       and the slurmctld daemon is executing on each), system behavior will be
       destructive.   If  a  compute  node  has an incorrect ControlMachine or
       BackupController parameter, that node may be rendered unusable, but  no
       other harm will result.

EXAMPLE

       #
       # Sample /etc/slurm.conf for dev[0-25].llnl.gov
       # Author: John Doe
       # Date: 11/06/2001
       #
       ControlMachine=dev0
       ControlAddr=edev0
       BackupController=dev1
       BackupAddr=edev1
       #
       AuthType=auth/munge
       Epilog=/usr/local/slurm/epilog
       Prolog=/usr/local/slurm/prolog
       FastSchedule=1
       FirstJobId=65536
       InactiveLimit=120
       JobCompType=jobcomp/filetxt
       JobCompLoc=/var/log/slurm/jobcomp
       KillWait=30
       MaxJobCount=10000
       MinJobAge=3600
       PluginDir=/usr/local/lib:/usr/local/slurm/lib
       ReturnToService=0
       SchedulerType=sched/backfill
       SlurmctldLogFile=/var/log/slurm/slurmctld.log
       SlurmdLogFile=/var/log/slurm/slurmd.log
       SlurmctldPort=7002
       SlurmdPort=7003
       SlurmdSpoolDir=/usr/local/slurm/slurmd.spool
       StateSaveLocation=/usr/local/slurm/slurm.state
       SwitchType=switch/elan
       TmpFS=/tmp
       WaitTime=30
       JobCredentialPrivateKey=/usr/local/slurm/private.key
       JobCredentialPublicCertificate=/usr/local/slurm/public.cert
       #
       # Node Configurations
       #
       NodeName=DEFAULT Procs=2 RealMemory=2000 TmpDisk=64000
       NodeName=DEFAULT State=UNKNOWN
       NodeName=dev[0-25] NodeAddr=edev[0-25] Weight=16
       # Update records for specific DOWN nodes
       DownNodes=dev20 State=DOWN Reason="power,ETA=Dec25"
       #
       # Partition Configurations
       #
       PartitionName=DEFAULT MaxTime=30 MaxNodes=10 State=UP
       PartitionName=debug Nodes=dev[0-8,18-25] Default=YES
       PartitionName=batch Nodes=dev[9-17]  MinNodes=4
       PartitionName=long Nodes=dev[9-17] MaxTime=120 AllowGroups=admin

COPYING

       Copyright  (C)  2002-2007  The Regents of the University of California.
       Copyright (C) 2008 Lawrence Livermore National Security.   Produced  at
       Lawrence    Livermore    National    Laboratory    (cf,    DISCLAIMER).
       LLNL-CODE-402394.

       This file is  part  of  SLURM,  a  resource  management  program.   For
       details, see <https://computing.llnl.gov/linux/slurm/>.

       SLURM  is free software; you can redistribute it and/or modify it under
       the terms of the GNU General Public License as published  by  the  Free
       Software  Foundation;  either  version  2  of  the License, or (at your
       option) any later version.

       SLURM is distributed in the hope that it will be  useful,  but  WITHOUT
       ANY  WARRANTY;  without even the implied warranty of MERCHANTABILITY or
       FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General  Public  License
       for more details.

FILES

       /etc/slurm.conf

SEE ALSO

       bluegene.conf(5),     gethostbyname(3),     getrlimit(2),     group(5),
       hostname(1),   scontrol(1),   slurmctld(8),   slurmd(8),   slurmdbd(8),
       slurmdbd.conf(5), spank(8), syslog(2), wiki.conf(5)