sbcast(1)

NAME

   sbcast - transmit a file to the nodes allocated to a Slurm job.

SYNOPSIS

   sbcast [-CfFjpstvV] SOURCE DEST

DESCRIPTION

   sbcast  is  used  to  transmit  a  file  to  all nodes allocated to the
   currently active Slurm job.  This command should only be executed  from
   within  a  Slurm  batch  job  or within the shell spawned after a Slurm
   job's resource allocation.  SOURCE is the name of a file on the current
   node.  DEST should be the fully qualified pathname for the file copy to
   be created on each node.  DEST should be on a file system local to that
   node.   Note  that parallel file systems may provide better performance
   than sbcast can provide, although performance will vary by  file  size,
   degree of parallelism, and network type.

OPTIONS

   -C [library], --compress[=library]
          Compress  the  file  being  transmitted.   The optional argument
          specifies the data compression library to  be  used.   Supported
          values   are  "lz4"  (default)  and  "zlib".   Some  compression
          libraries may be unavailable on some systems.

   -f, --force
          If the destination file already exists, replace it.

   -F number, --fanout=number
          Specify the fanout of messages used for file transfer.   Maximum
          value is currently eight.

   -j jobID[.stepID], --jobid=jobID[.stepID]
          Specify  the job ID to use with optional step ID.  If run inside
          an allocation this is unneeded as the job ID will read from  the
          environment.

   -p, --preserve
          Preserves  modification  times, access times, and modes from the
          original file.

   -s size, --size=size
          Specify the block size used for file broadcast.   The  size  can
          have  a suffix of k or m for kilobytes or megabytes respectively
          (defaults to bytes).  This size subject to  rounding  and  range
          limits  to  maintain good performance.  The default value is the
          file size or 8MB, whichever is smaller.  This value may need  to
          be set on systems with very limited memory.

   -t seconds, fB--timeout=seconds
          Specify  the  message  timeout in seconds.  The default value is
          MessageTimeout as reported by "scontrol show config".  Setting a
          higher   value  may  be  necessitated  by  relatively  slow  I/O
          performance on the compute node disks.

   -v, --verbose
          Provide detailed event logging through program execution.

   -V, --version
          Print version information and exit.

ENVIRONMENT VARIABLES

   Some sbcast options  may  be  set  via  environment  variables.   These
   environment  variables,  along  with  their  corresponding options, are
   listed below. (Note: Command line options will  always  override  these
   settings.)

   SBCAST_COMPRESS     -C, --compress

   SBCAST_FANOUT       -F number, fB--fanout=number

   SBCAST_FORCE        -f, --force

   SBCAST_PRESERVE     -p, --preserve

   SBCAST_SIZE         -s size, --size=size

   SBCAST_TIMEOUT      -t seconds, fB--timeout=seconds

   SLURM_CONF          The location of the Slurm configuration file.

AUTHORIZATION

   When  using the Slurm db, users who have AdminLevel's defined (Operator
   or Admin)  and  users  who  are  account  coordinators  are  given  the
   authority to invoke sbcast on other user's jobs.

EXAMPLE

   Using  a  batch  script, transmit local file my.prog to /tmp/my.proc on
   the local nodes and then execute it.

   > cat my.job
   #!/bin/bash
   sbcast my.prog /tmp/my.prog
   srun /tmp/my.prog

   > sbatch --nodes=8 my.job
   srun: jobid 12345 submitted

COPYING

   Copyright (C) 2006-2010 The Regents of the  University  of  California.
   Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   Copyright (C) 2010-2013 SchedMD LLC.

   This  file  is  part  of  Slurm,  a  resource  management program.  For
   details, see <http://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

   srun(1)

Opportunity

Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.

Education

Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.