NAME¶
sbcast - transmit a file to the nodes allocated to a SLURM job.
SYNOPSIS¶
sbcast [-CfpstvV] SOURCE DEST
DESCRIPTION¶
sbcast is used to transmit a file to all nodes allocated to the currenly
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, --compress
- Compress the file being transmitted.
- -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.
- -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
respecitively (defaults to bytes). This size subject to rounding and range
limits to maintain good performance. 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
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 The Regents of the University of California. Produced at
Lawrence Livermore National Laboratory (cf, DISCLAIMER). CODE-OCEC-09-009. All
rights reserved.
This file is part of SLURM, a resource management program. For details, see
<
http://www.schedmd.com/slurmdocs/>.
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)