NAME

       topology.conf - Slurm configuration file for defining the network topology

PREREQUISITES

       Topology.conf  can only represent a hierarchical network. All nodes in the network must be
       connected to at  least  one  switch.  The  network  must  be  fully  connected  to  use  a
       RoutePlugin.  Jobs  can only span nodes connected by the same switch fabric, even if there
       are available idle nodes.

DESCRIPTION

       topology.conf is an  ASCII  file  which  describes  the  cluster's  network  topology  for
       optimized job resource allocation.  The file location can be modified at system build time
       using the DEFAULT_SLURM_CONF parameter or at execution  time  by  setting  the  SLURM_CONF
       environment  variable.  The  file  will  always  be  located  in the same directory as the
       slurm.conf file.

       Parameter names are case insensitive.  Any text following a "#" in the configuration  file
       is  treated  as a comment through the end of that line.  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.

       The  network  topology  configuration  one  line  defining a switch name and its children,
       either node names or switch names.  Slurm's hostlist expression parser  is  used,  so  the
       node  and  switch  names  need  not  be  consecutive  (e.g.  "Nodes=tux[0-3,12,18-20]" and
       "Switches=s[0-2,4-8,12]" will parse fine).  An optional link speed may also be specified.

       The topology.conf file for an Infiniband switch can be automatically generated  using  the
       slurmibtopology tool found here: <https://ftp.fysik.dtu.dk/Slurm/slurmibtopology.sh>.

       The overall configuration parameters available include:

       SwitchName
              The  name  of  a switch. This name is internal to Slurm and arbitrary.  Each switch
              should have a unique name.  This field must be specified.

       Switches
              Child switches of the named switch.  Either this option or the Nodes option must be
              specified.

       Nodes  Child  Nodes  of  the named leaf switch.  Either this option or the Switches option
              must be specified.

       LinkSpeed
              An optional value specifying the performance of this communication link.  The units
              used  are  arbitrary and this information is currently not used.  It may be used in
              the future to optimize resource allocations.

EXAMPLE

       ##################################################################
       # Slurm's network topology configuration file for use with the
       # topology/tree plugin
       ##################################################################
       SwitchName=s0 Nodes=dev[0-5]
       SwitchName=s1 Nodes=dev[6-11]
       SwitchName=s2 Nodes=dev[12-17]
       SwitchName=s3 Switches=s[0-2]

COPYING

       Copyright (C) 2009 Lawrence Livermore National Security.  Produced at  Lawrence  Livermore
       National Laboratory (cf, DISCLAIMER).
       Copyright (C) 2010-2021 SchedMD LLC.

       This   file   is  part  of  Slurm,  a  resource  management  program.   For  details,  see
       <https://slurm.schedmd.com/>.

       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.

SEE ALSO

       slurm.conf(5)