.TH sattach "1" "Slurm Commands" "April 2015" "Slurm Commands" .SH "NAME" .LP sattach \- Attach to a Slurm job step. .SH "SYNOPSIS" .LP sattach [\fIoptions\fP] .SH "DESCRIPTION" .LP sattach attaches to a running Slurm job step. By attaching, it makes available the IO streams of all of the tasks of a running Slurm job step. It also suitable for use with a parallel debugger like TotalView. .SH "OPTIONS" .LP .TP \fB\-h\fR, \fB\-\-help\fR Display help information and exit. .TP \fB\-\-input\-filter\fR[=]<\fItask number\fR> .PD 0 .TP \fB\-\-output\-filter\fR[=]<\fItask number\fR> .PD 0 .TP \fB\-\-error\-filter\fR[=]<\fItask number\fR> .PD Only transmit standard input to a single task, or print the standard output or standard error from a single task. The filtering is performed locally in sattach. .TP \fB\-l\fR, \fB\-\-label\fR Prepend each line of task standard output or standard error with the task number of its origin. .TP \fB\-\-layout\fR Contacts the slurmctld to obtain the task layout information for the job step, prints the task layout information, and then exits without attaching to the job step. .TP \fB\-\-pty\fR Execute task zero in pseudo terminal. Not compatible with the \fB\-\-input\-filter\fR, \fB\-\-output\-filter\fR, or \fB\-\-error\-filter\fR options. Notes: The terminal size and resize events are ignored by sattach. Proper operation requires that the job step be initiated by srun using the \-\-pty option. .TP \fB\-Q\fR, \fB\-\-quiet\fR Suppress informational messages from sattach. Errors will still be displayed. .TP \fB\-u\fR, \fB\-\-usage\fR Display brief usage message and exit. .TP \fB\-V\fR, \fB\-\-version\fR Display Slurm version number and exit. .TP \fB\-v\fR, \fB\-\-verbose\fR Increase the verbosity of sattach's informational messages. Multiple \fB\-v\fR's will further increase sattach's verbosity. .SH "PERFORMANCE" .PP Executing \fBsattach\fR sends a remote procedure call to \fBslurmctld\fR. If enough calls from \fBsattach\fR or other Slurm client commands that send remote procedure calls to the \fBslurmctld\fR daemon come in at once, it can result in a degradation of performance of the \fBslurmctld\fR daemon, possibly resulting in a denial of service. .PP Do not run \fBsattach\fR or other Slurm client commands that send remote procedure calls to \fBslurmctld\fR from loops in shell scripts or other programs. Ensure that programs limit calls to \fBsattach\fR to the minimum necessary for the information you are trying to gather. .SH "INPUT ENVIRONMENT VARIABLES" .PP Upon startup, salloc will read and handle the options set in the following environment variables. Note: Command line options always override environment variables settings. .TP .TP 20 \fBSLURM_CONF\fR The location of the Slurm configuration file. .TP \fBSLURM_EXIT_ERROR\fR Specifies the exit code generated when a Slurm error occurs (e.g. invalid options). This can be used by a script to distinguish application exit codes from various Slurm error conditions. .SH "EXAMPLES" .LP sattach 15.0 sattach \-\-output\-filter 5 65386.15 .SH "COPYING" Copyright (C) 2006\-2007 The Regents of the University of California. Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). .br Copyright (C) 2008\-2009 Lawrence Livermore National Security. .br Copyright (C) 2010\-2013 SchedMD LLC. .LP This file is part of Slurm, a resource management program. For details, see . .LP 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. .LP 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. .SH "SEE ALSO" .LP \fBsinfo\fR(1), \fBsalloc\fR(1), \fBsbatch\fR(1), \fBsqueue\fR(1), \fBscancel\fR(1), \fBscontrol\fR(1), \fBslurm.conf\fR(5), \fBsched_setaffinity\fR (2), \fBnuma\fR (3)