contribs/torque/qsub.pl - SchedMD/slurm - Git at Google

 #! /usr/bin/perl -w
 ###############################################################################
 #
 # qsub - submit a batch job in familar pbs format.
 #
 #
 ###############################################################################
 #  Copyright (C) 2007 The Regents of the University of California.
 #  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 #  Written by Danny Auble <auble1@llnl.gov>.
 #  CODE-OCEC-09-009. All rights reserved.
 #
 #  This file is part of SLURM, a resource management program.
 #  For details, see <http://slurm.schedmd.com/>.
 #  Please also read the included file: DISCLAIMER.
 #
 #  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.
 #
 #  In addition, as a special exception, the copyright holders give permission
 #  to link the code of portions of this program with the OpenSSL library under
 #  certain conditions as described in each individual source file, and
 #  distribute linked combinations including the two. You must obey the GNU
 #  General Public License in all respects for all of the code used other than
 #  OpenSSL. If you modify file(s) with this exception, you may extend this
 #  exception to your version of the file(s), but you are not obligated to do
 #  so. If you do not wish to do so, delete this exception statement from your
 #  version.  If you delete this exception statement from all source files in
 #  the program, then also delete it here.
 #
 #  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.
 #
 #  You should have received a copy of the GNU General Public License along
 #  with SLURM; if not, write to the Free Software Foundation, Inc.,
 #  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
 #
 ###############################################################################

 use strict;
 use FindBin;
 use Getopt::Long 2.24 qw(:config no_ignore_case require_order);
 use lib "${FindBin::Bin}/../lib/perl";
 use autouse 'Pod::Usage' => qw(pod2usage);
 use Slurm ':all';
 use Switch;
 use English;

 my ($start_time,
     $account,
     $array,
     $err_path,
     $interactive,
     $hold,
     $resource_list,
     $mail_options,
     $mail_user_list,
     $job_name,
     $out_path,
     $priority,
     $destination,
     $variable_list,
     @additional_attributes,
     $help,
     $resp,
     $man);

 my $sbatch = "${FindBin::Bin}/sbatch";
 my $salloc = "${FindBin::Bin}/salloc";
 my $srun = "${FindBin::Bin}/srun";

 GetOptions('a=s'      => \$start_time,
 	   'A=s'      => \$account,
 	   'e=s'      => \$err_path,
 	   'h'        => \$hold,
 	   'I'        => \$interactive,
 	   'j:s'      => sub { warn "option -j is the default, " .
 				    "stdout/stderr go into the same file\n" },
 	   'J=s'      => \$array,
 	   'l=s'      => \$resource_list,
 	   'm=s'      => \$mail_options,
 	   'M=s'      => \$mail_user_list,
 	   'N=s'      => \$job_name,
 	   'o=s'      => \$out_path,
 	   'p=i'      => \$priority,
 	   'q=s'      => \$destination,
 	   'S=s'      => sub { warn "option -S is ignored, " .
 				    "specify shell via #!<shell> in the job script\n" },
 	   't=s'      => \$array,
 	   'v=s'      => \$variable_list,
 	   'V'        => sub { warn "option -V is not necessary, " .
 				    "since the current environment " .
 				    "is exported by default\n" },
 	   'W=s'      => \@additional_attributes,
 	   'help|?'   => \$help,
 	   'man'      => \$man,
 	   )
 	or pod2usage(2);

 # Display usage if necessary
 pod2usage(0) if $help;
 if ($man) {
         if ($< == 0) {   # Cannot invoke perldoc as root
 		my $id = eval { getpwnam("nobody") };
 		$id = eval { getpwnam("nouser") } unless defined $id;
 		$id = -2                          unless defined $id;
 		$<  = $id;
         }
         $> = $<;                         # Disengage setuid
         $ENV{PATH} = "/bin:/usr/bin";    # Untaint PATH
         delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
         if ($0 =~ /^([-\/\w\.]+)$/) { $0 = $1; }    # Untaint $0
         else { die "Illegal characters were found in \$0 ($0)\n"; }
         pod2usage(-exitstatus => 0, -verbose => 2);
 }

 # Use sole remaining argument as jobIds
 my $script;
 if ($ARGV[0]) {
 	foreach (@ARGV) {
 	        $script .= "$_ ";
 	}
 }
 my $block="false";
 my $depend;
 my $group_list;
 my $job_id;
 my %res_opts;
 my %node_opts;

 # remove PBS_NODEFILE environment as passed in to qsub.
 if ($ENV{PBS_NODEFILE}) {
 	delete $ENV{PBS_NODEFILE};
 }

 # Process options provided with the -W name=value syntax.
 my $W;
 foreach $W (@additional_attributes) {
 	my($name, $value) = split('=', $W);
 	if ($name eq 'umask') {
 		$ENV{SLURM_UMASK} = $value;
 	} elsif ($name eq 'depend') {
 		$depend = $value;
 	} elsif ($name eq 'group_list') {
 		$group_list = $value;
 	} elsif (lc($name) eq 'block') {
 		if (defined $value) {
 			$block = $value;
 		}
 #	} else {
 #		print("Invalid attribute: $W!");
 #		exit(1);
 	}
 }

 if ($resource_list) {
 	%res_opts = %{parse_resource_list($resource_list)};

 # 	while((my $key, my $val) = each(%res_opts)) {
 # 		print "$key = ";
 # 		if($val) {
 # 			print "$val\n";
 # 		} else {
 # 			print "\n";
 # 		}
 # 	}

 	if($res_opts{nodes}) {
 		%node_opts =  %{parse_node_opts($res_opts{nodes})};
 	}
 	if ($res_opts{select} && (!$node_opts{node_cnt} || ($res_opts{select} > $node_opts{node_cnt}))) {
 		$node_opts{node_cnt} = $res_opts{select};
 	}
 	if ($res_opts{select} && $res_opts{ncpus} && $res_opts{mpiprocs}) {
 		my $cpus_per_task = int ($res_opts{ncpus} / $res_opts{mppnppn});
 		if (!$res_opts{mppdepth} || ($cpus_per_task > $res_opts{mppdepth})) {
 			$res_opts{mppdepth} = $cpus_per_task;
 		}
 	}
 }

 if($variable_list) {
 	$variable_list =~ s/\'/\"/g;
 	my @parts = $variable_list =~ m/(?:(?<=")[^"]*(?=(?:\s*"\s*,|\s*"\s*$)))|(?<=,)(?:[^",]*(?=(?:\s*,|\s*$)))|(?<=^)(?:[^",]+(?=(?:\s*,|\s*$)))|(?<=^)(?:[^",]*(?=(?:\s*,)))/g;
 	foreach my $part (@parts) {
 		my ($key, $value) = $part =~ /(.*)=(.*)/;
 		if (defined($key) && defined($value)) {
 			$ENV{$key} = $value;
 		}
 	}
 }

 my $command;

 if($interactive) {
 	$command = "$salloc";

 #	Always want at least one node in the allocation
 	if (!$node_opts{node_cnt}) {
 		$node_opts{node_cnt} = 1;
 	}

 #	Calculate the task count based of the node cnt and the amount
 #	of ppn's in the request
 	if ($node_opts{task_cnt}) {
 		$node_opts{task_cnt} *= $node_opts{node_cnt};
 	}

 	if (!$node_opts{node_cnt} && !$node_opts{task_cnt} && !$node_opts{hostlist}) {
 		$node_opts{task_cnt} = 1;
 	}
 } else {
 	if (!$script) {
 		pod2usage(2);
 	}

 	$command = "$sbatch";

 	$command .= " -e $err_path" if $err_path;
 	$command .= " -o $out_path" if $out_path;

 #	The job size specification may be within the batch script,
 #	Reset task count if node count also specified
 	if ($node_opts{task_cnt} && $node_opts{node_cnt}) {
 		$node_opts{task_cnt} *= $node_opts{node_cnt};
 	}
 }

 $command .= " -N$node_opts{node_cnt}" if $node_opts{node_cnt};
 $command .= " -n$node_opts{task_cnt}" if $node_opts{task_cnt};
 $command .= " -w$node_opts{hostlist}" if $node_opts{hostlist};

 $command .= " --mincpus=$res_opts{ncpus}"            if $res_opts{ncpus};
 $command .= " --ntasks-per-node=$res_opts{mppnppn}"  if $res_opts{mppnppn};

 if($res_opts{walltime}) {
 	$command .= " -t$res_opts{walltime}";
 } elsif($res_opts{cput}) {
 	$command .= " -t$res_opts{cput}";
 } elsif($res_opts{pcput}) {
 	$command .= " -t$res_opts{pcput}";
 }

 $command .= " --account='$group_list'" if $group_list;
 $command .= " --array='$array'" if $array;
 $command .= " --constraint='$res_opts{proc}'" if $res_opts{proc};
 $command .= " --dependency=$depend"   if $depend;
 $command .= " --tmp=$res_opts{file}"  if $res_opts{file};
 $command .= " --mem=$res_opts{mem}"   if $res_opts{mem};
 $command .= " --nice=$res_opts{nice}" if $res_opts{nice};

 $command .= " --gres=gpu:$res_opts{naccelerators}"  if $res_opts{naccelerators};

 # Cray-specific options
 $command .= " -n$res_opts{mppwidth}"		    if $res_opts{mppwidth};
 $command .= " -w$res_opts{mppnodes}"		    if $res_opts{mppnodes};
 $command .= " --cpus-per-task=$res_opts{mppdepth}"  if $res_opts{mppdepth};

 $command .= " --begin=$start_time" if $start_time;
 $command .= " --account=$account" if $account;
 $command .= " -H" if $hold;

 if($mail_options) {
 	$command .= " --mail-type=FAIL" if $mail_options =~ /a/;
 	$command .= " --mail-type=BEGIN" if $mail_options =~ /b/;
 	$command .= " --mail-type=END" if $mail_options =~ /e/;
 }
 $command .= " --mail-user=$mail_user_list" if $mail_user_list;
 $command .= " -J $job_name" if $job_name;
 $command .= " --nice=$priority" if $priority;
 $command .= " -p $destination" if $destination;
 $command .= " $script" if $script;

 # print "$command\n";

 # Execute the command and capture its stdout, stderr, and exit status. Note
 # that if interactive mode was requested, the standard output and standard
 # error are _not_ captured.
 if ($interactive) {
 	my $ret = system($command);
 	exit ($ret >> 8);
 } else {
 	# Capture stderr from the command to the stdout stream.
 	$command .= ' 2>&1';

 	# Execute the command and capture the combined stdout and stderr.
 	my @command_output = `$command 2>&1`;

 	# Save the command exit status.
 	my $command_exit_status = $CHILD_ERROR;

 	# If available, extract the job ID from the command output and print
 	# it to stdout, as done in the PBS version of qsub.
 	if ($command_exit_status == 0) {
 		my @spcommand_output=split(" ", $command_output[$#command_output]);
 		$job_id= $spcommand_output[$#spcommand_output];
 		print "$job_id\n";
 	} else {
 		print("There was an error running the SLURM sbatch command.\n" .
 		      "The command was:\n" .
 		      "'$command'\n" .
 		      "and the output was:\n" .
 		      "'@command_output'\n");
 	}

 	# If block is true wait for the job to finish
 	my($resp, $count);
 	my $slurm = Slurm::new();
 	if ( (lc($block) eq "true" ) and ($command_exit_status == 0) ) {
 		sleep 2;
 		my($job) = $slurm->load_job($job_id);
 		$resp = $$job{'job_array'}[0]->{job_state};
 		while ( $resp < JOB_COMPLETE ) {
 			$job = $slurm->load_job($job_id);
 			$resp = $$job{'job_array'}[0]->{job_state};
 			sleep 1;
 		}
 	}

 	# Exit with the command return code.
 	exit($command_exit_status >> 8);
 }

 sub parse_resource_list {
 	my ($rl) = @_;
 	my %opt = ('accelerator' => "",
 		   'arch' => "",
 		   'block' => "",
 		   'cput' => "",
 		   'file' => "",
 		   'host' => "",
 		   'mem' => "",
 		   'mpiprocs' => "",
 		   'ncpus' => "",
 		   'nice' => "",
 		   'nodes' => "",
 		   'naccelerators' => "",
 		   'opsys' => "",
 		   'other' => "",
 		   'pcput' => "",
 		   'pmem' => "",
 		   'proc' => '',
 		   'pvmem' => "",
 		   'select' => "",
 		   'software' => "",
 		   'vmem' => "",
 		   'walltime' => "",
 		   # Cray-specific resources
 		   'mppwidth' => "",
 		   'mppdepth' => "",
 		   'mppnppn' => "",
 		   'mppmem' => "",
 		   'mppnodes' => ""
 		   );
 	my @keys = keys(%opt);

 #	The select option uses a ":" separator rather than ","
 #	This wrapper currently does not support multiple select options

 #	Protect the colons used to separate elements in walltime=hh:mm:ss.
 #	Convert to NNhNNmNNs format.
 	$rl =~ s/walltime=(\d{1,2}):(\d{2}):(\d{2})/walltime=$1h$2m$3s/;

 	$rl =~ s/:/,/g;
 	foreach my $key (@keys) {
 		#print "$rl\n";
 		($opt{$key}) = $rl =~ m/$key=([\w:\+=+]+)/;

 	}

 #	If needed, un-protect the walltime string.
 	if ($opt{walltime}) {
 		$opt{walltime} =~ s/(\d{1,2})h(\d{2})m(\d{2})s/$1:$2:$3/;
 #		Convert to minutes for SLURM.
 		$opt{walltime} = get_minutes($opt{walltime});
 	}

 	if($opt{accelerator} && $opt{accelerator} =~ /^[Tt]/ && !$opt{naccelerators}) {
 		$opt{naccelerators} = 1;
 	}

 	if($opt{cput}) {
 		$opt{cput} = get_minutes($opt{cput});
 	}

 	if ($opt{mpiprocs} && (!$opt{mppnppn} || ($opt{mpiprocs} > $opt{mppnppn}))) {
 		$opt{mppnppn} = $opt{mpiprocs};
 	}

 	if($opt{mppmem}) {
 		$opt{mem} = convert_mb_format($opt{mppmem});
 	} elsif($opt{mem}) {
 		$opt{mem} = convert_mb_format($opt{mem});
 	}

 	if($opt{file}) {
 		$opt{file} = convert_mb_format($opt{file});
 	}

 	return \%opt;
 }

 sub parse_node_opts {
 	my ($node_string) = @_;
 	my %opt = ('node_cnt' => 0,
 		   'hostlist' => "",
 		   'task_cnt' => 0
 		   );
 	while($node_string =~ /ppn=(\d+)/g) {
 		$opt{task_cnt} += $1;
 	}

 	my $hl = Slurm::Hostlist::create("");

 	my @parts = split(/\+/, $node_string);
 	foreach my $part (@parts) {
 		my @sub_parts = split(/:/, $part);
 		foreach my $sub_part (@sub_parts) {
 			if($sub_part =~ /ppn=(\d+)/) {
 				next;
 			} elsif($sub_part =~ /^(\d+)/) {
 				$opt{node_cnt} += $1;
 			} else {
 				if(!Slurm::Hostlist::push($hl, $sub_part)) {
 					print "problem pushing host $sub_part onto hostlist\n";
 				}
 			}
 		}
 	}

 	$opt{hostlist} = Slurm::Hostlist::ranged_string($hl);

 	my $hl_cnt = Slurm::Hostlist::count($hl);
 	$opt{node_cnt} = $hl_cnt if $hl_cnt > $opt{node_cnt};

 	return \%opt;
 }

 sub get_minutes {
     my ($duration) = @_;
     $duration = 0 unless $duration;
     my $minutes = 0;

     # Convert [[HH:]MM:]SS to duration in minutes
     if ($duration =~ /^(?:(\d+):)?(\d*):(\d+)$/) {
         my ($hh, $mm, $ss) = ($1 || 0, $2 || 0, $3);
 	$minutes += 1 if $ss > 0;
         $minutes += $mm;
         $minutes += $hh * 60;
     } elsif ($duration =~ /^(\d+)$/) {  # Convert number in minutes to seconds
 	    my $mod = $duration % 60;
 	    $minutes = int($duration / 60);
 	    $minutes++ if $mod;
     } else { # Unsupported format
         die("Invalid time limit specified ($duration)\n");
     }

     return $minutes;
 }

 sub convert_mb_format {
 	my ($value) = @_;
 	my ($amount, $suffix) = $value =~ /(\d+)($|[KMGT])/i;
 	return if !$amount;
 	$suffix = lc($suffix);

 	if (!$suffix) {
 		$amount /= 1048576;
 	} elsif ($suffix eq "k") {
 		$amount /= 1024;
 	} elsif ($suffix eq "m") {
 		#do nothing this is what we want.
 	} elsif ($suffix eq "g") {
 		$amount *= 1024;
 	} elsif ($suffix eq "t") {
 		$amount *= 1048576;
 	} else {
 		print "don't know what to do with suffix $suffix\n";
 		return;
 	}

 	$amount .= "M";

 	return $amount;
 }
 ##############################################################################

 __END__

 =head1 NAME

 B<qsub> - submit a batch job in a familiar pbs format

 =head1 SYNOPSIS

 qsub  [-a start_time]
       [-A account]
       [-e err_path]
       [-I]
       [-l resource_list]
       [-m mail_options] [-M user_list]
       [-N job_name]
       [-o out_path]
       [-p priority]
       [-q destination]
       [-v variable_list]
       [-W additional_attributes]
       [-h]
       [script]

 =head1 DESCRIPTION

 The B<qsub> submits batch jobs. It is aimed to be feature-compatible with PBS' qsub.

 =head1 OPTIONS

 =over 4

 =item B<-a>

 Earliest start time of job. Format: [HH:MM][MM/DD/YY]

 =item B<-A account>

 Specify the account to which the job should be charged.

 =item B<-e err_path>

 Specify a new path to receive the standard error output for the job.

 =item B<-I>

 Interactive execution.

 =item B<-J job_array>

 Job array index values. The -J and -t options are equivalent.

 =item B<-l resource_list>

 Specify an additional list of resources to request for the job.

 =item B<-m mail_options>

 Specify a list of events on which email is to be generated.

 =item B<-M user_list>

 Specify a list of email addresses to receive messages on specified events.

 =item B<-N job_name>

 Specify a name for the job.

 =item B<-o out_path>

 Specify the path to a file to hold the standard output from the job.

 =item B<-p priority>

 Specify the priority under which the job should run.

 =item B<-p priority>

 Specify the priority under which the job should run.

 =item B<-t job_array>

 Job array index values. The -J and -t options are equivalent.

 =item B<-v> [variable_list]

 Exporting single variables via -v is generally not required, since the entire
 login environment is exported by the default. However this option can be used
 to add newly defined environment variables to specific jobs.

 =item B<-V>

 The -V option to export the current environment is not required since it is
 done by default.

 =item B<-?> | B<--help>

 brief help message

 =item B<--man>

 full documentation

 =back

 =cut
	#! /usr/bin/perl -w
	###############################################################################
	#
	# qsub - submit a batch job in familar pbs format.
	#
	#
	###############################################################################
	# Copyright (C) 2007 The Regents of the University of California.
	# Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
	# Written by Danny Auble <auble1@llnl.gov>.
	# CODE-OCEC-09-009. All rights reserved.
	#
	# This file is part of SLURM, a resource management program.
	# For details, see <http://slurm.schedmd.com/>.
	# Please also read the included file: DISCLAIMER.
	#
	# 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.
	#
	# In addition, as a special exception, the copyright holders give permission
	# to link the code of portions of this program with the OpenSSL library under
	# certain conditions as described in each individual source file, and
	# distribute linked combinations including the two. You must obey the GNU
	# General Public License in all respects for all of the code used other than
	# OpenSSL. If you modify file(s) with this exception, you may extend this
	# exception to your version of the file(s), but you are not obligated to do
	# so. If you do not wish to do so, delete this exception statement from your
	# version. If you delete this exception statement from all source files in
	# the program, then also delete it here.
	#
	# 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.
	#
	# You should have received a copy of the GNU General Public License along
	# with SLURM; if not, write to the Free Software Foundation, Inc.,
	# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	#
	###############################################################################

	use strict;
	use FindBin;
	use Getopt::Long 2.24 qw(:config no_ignore_case require_order);
	use lib "${FindBin::Bin}/../lib/perl";
	use autouse 'Pod::Usage' => qw(pod2usage);
	use Slurm ':all';
	use Switch;
	use English;

	my ($start_time,
	$account,
	$array,
	$err_path,
	$interactive,
	$hold,
	$resource_list,
	$mail_options,
	$mail_user_list,
	$job_name,
	$out_path,
	$priority,
	$destination,
	$variable_list,
	@additional_attributes,
	$help,
	$resp,
	$man);

	my $sbatch = "${FindBin::Bin}/sbatch";
	my $salloc = "${FindBin::Bin}/salloc";
	my $srun = "${FindBin::Bin}/srun";

	GetOptions('a=s' => \$start_time,
	'A=s' => \$account,
	'e=s' => \$err_path,
	'h' => \$hold,
	'I' => \$interactive,
	'j:s' => sub { warn "option -j is the default, " .
	"stdout/stderr go into the same file\n" },
	'J=s' => \$array,
	'l=s' => \$resource_list,
	'm=s' => \$mail_options,
	'M=s' => \$mail_user_list,
	'N=s' => \$job_name,
	'o=s' => \$out_path,
	'p=i' => \$priority,
	'q=s' => \$destination,
	'S=s' => sub { warn "option -S is ignored, " .
	"specify shell via #!<shell> in the job script\n" },
	't=s' => \$array,
	'v=s' => \$variable_list,
	'V' => sub { warn "option -V is not necessary, " .
	"since the current environment " .
	"is exported by default\n" },
	'W=s' => \@additional_attributes,
	'help\|?' => \$help,
	'man' => \$man,
	)
	or pod2usage(2);

	# Display usage if necessary
	pod2usage(0) if $help;
	if ($man) {
	if ($< == 0) { # Cannot invoke perldoc as root
	my $id = eval { getpwnam("nobody") };
	$id = eval { getpwnam("nouser") } unless defined $id;
	$id = -2 unless defined $id;
	$< = $id;
	}
	$> = $<; # Disengage setuid
	$ENV{PATH} = "/bin:/usr/bin"; # Untaint PATH
	delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
	if ($0 =~ /^([-\/\w\.]+)$/) { $0 = $1; } # Untaint $0
	else { die "Illegal characters were found in \$0 ($0)\n"; }
	pod2usage(-exitstatus => 0, -verbose => 2);
	}

	# Use sole remaining argument as jobIds
	my $script;
	if ($ARGV[0]) {
	foreach (@ARGV) {
	$script .= "$_ ";
	}
	}
	my $block="false";
	my $depend;
	my $group_list;
	my $job_id;
	my %res_opts;
	my %node_opts;

	# remove PBS_NODEFILE environment as passed in to qsub.
	if ($ENV{PBS_NODEFILE}) {
	delete $ENV{PBS_NODEFILE};
	}

	# Process options provided with the -W name=value syntax.
	my $W;
	foreach $W (@additional_attributes) {
	my($name, $value) = split('=', $W);
	if ($name eq 'umask') {
	$ENV{SLURM_UMASK} = $value;
	} elsif ($name eq 'depend') {
	$depend = $value;
	} elsif ($name eq 'group_list') {
	$group_list = $value;
	} elsif (lc($name) eq 'block') {
	if (defined $value) {
	$block = $value;
	}
	# } else {
	# print("Invalid attribute: $W!");
	# exit(1);
	}
	}

	if ($resource_list) {
	%res_opts = %{parse_resource_list($resource_list)};

	# while((my $key, my $val) = each(%res_opts)) {
	# print "$key = ";
	# if($val) {
	# print "$val\n";
	# } else {
	# print "\n";
	# }
	# }

	if($res_opts{nodes}) {
	%node_opts = %{parse_node_opts($res_opts{nodes})};
	}
	if ($res_opts{select} && (!$node_opts{node_cnt} \|\| ($res_opts{select} > $node_opts{node_cnt}))) {
	$node_opts{node_cnt} = $res_opts{select};
	}
	if ($res_opts{select} && $res_opts{ncpus} && $res_opts{mpiprocs}) {
	my $cpus_per_task = int ($res_opts{ncpus} / $res_opts{mppnppn});
	if (!$res_opts{mppdepth} \|\| ($cpus_per_task > $res_opts{mppdepth})) {
	$res_opts{mppdepth} = $cpus_per_task;
	}
	}
	}

	if($variable_list) {
	$variable_list =~ s/\'/\"/g;
	my @parts = $variable_list =~ m/(?:(?<=")[^"](?=(?:\s"\s,\|\s"\s$)))\|(?<=,)(?:[^",](?=(?:\s,\|\s$)))\|(?<=^)(?:[^",]+(?=(?:\s,\|\s$)))\|(?<=^)(?:[^",](?=(?:\s,)))/g;
	foreach my $part (@parts) {
	my ($key, $value) = $part =~ /(.)=(.)/;
	if (defined($key) && defined($value)) {
	$ENV{$key} = $value;
	}
	}
	}

	my $command;

	if($interactive) {
	$command = "$salloc";

	# Always want at least one node in the allocation
	if (!$node_opts{node_cnt}) {
	$node_opts{node_cnt} = 1;
	}

	# Calculate the task count based of the node cnt and the amount
	# of ppn's in the request
	if ($node_opts{task_cnt}) {
	$node_opts{task_cnt} *= $node_opts{node_cnt};
	}

	if (!$node_opts{node_cnt} && !$node_opts{task_cnt} && !$node_opts{hostlist}) {
	$node_opts{task_cnt} = 1;
	}
	} else {
	if (!$script) {
	pod2usage(2);
	}

	$command = "$sbatch";

	$command .= " -e $err_path" if $err_path;
	$command .= " -o $out_path" if $out_path;

	# The job size specification may be within the batch script,
	# Reset task count if node count also specified
	if ($node_opts{task_cnt} && $node_opts{node_cnt}) {
	$node_opts{task_cnt} *= $node_opts{node_cnt};
	}
	}

	$command .= " -N$node_opts{node_cnt}" if $node_opts{node_cnt};
	$command .= " -n$node_opts{task_cnt}" if $node_opts{task_cnt};
	$command .= " -w$node_opts{hostlist}" if $node_opts{hostlist};

	$command .= " --mincpus=$res_opts{ncpus}" if $res_opts{ncpus};
	$command .= " --ntasks-per-node=$res_opts{mppnppn}" if $res_opts{mppnppn};

	if($res_opts{walltime}) {
	$command .= " -t$res_opts{walltime}";
	} elsif($res_opts{cput}) {
	$command .= " -t$res_opts{cput}";
	} elsif($res_opts{pcput}) {
	$command .= " -t$res_opts{pcput}";
	}

	$command .= " --account='$group_list'" if $group_list;
	$command .= " --array='$array'" if $array;
	$command .= " --constraint='$res_opts{proc}'" if $res_opts{proc};
	$command .= " --dependency=$depend" if $depend;
	$command .= " --tmp=$res_opts{file}" if $res_opts{file};
	$command .= " --mem=$res_opts{mem}" if $res_opts{mem};
	$command .= " --nice=$res_opts{nice}" if $res_opts{nice};

	$command .= " --gres=gpu:$res_opts{naccelerators}" if $res_opts{naccelerators};

	# Cray-specific options
	$command .= " -n$res_opts{mppwidth}" if $res_opts{mppwidth};
	$command .= " -w$res_opts{mppnodes}" if $res_opts{mppnodes};
	$command .= " --cpus-per-task=$res_opts{mppdepth}" if $res_opts{mppdepth};

	$command .= " --begin=$start_time" if $start_time;
	$command .= " --account=$account" if $account;
	$command .= " -H" if $hold;

	if($mail_options) {
	$command .= " --mail-type=FAIL" if $mail_options =~ /a/;
	$command .= " --mail-type=BEGIN" if $mail_options =~ /b/;
	$command .= " --mail-type=END" if $mail_options =~ /e/;
	}
	$command .= " --mail-user=$mail_user_list" if $mail_user_list;
	$command .= " -J $job_name" if $job_name;
	$command .= " --nice=$priority" if $priority;
	$command .= " -p $destination" if $destination;
	$command .= " $script" if $script;

	# print "$command\n";

	# Execute the command and capture its stdout, stderr, and exit status. Note
	# that if interactive mode was requested, the standard output and standard
	# error are _not_ captured.
	if ($interactive) {
	my $ret = system($command);
	exit ($ret >> 8);
	} else {
	# Capture stderr from the command to the stdout stream.
	$command .= ' 2>&1';

	# Execute the command and capture the combined stdout and stderr.
	my @command_output = `$command 2>&1`;

	# Save the command exit status.
	my $command_exit_status = $CHILD_ERROR;

	# If available, extract the job ID from the command output and print
	# it to stdout, as done in the PBS version of qsub.
	if ($command_exit_status == 0) {
	my @spcommand_output=split(" ", $command_output[$#command_output]);
	$job_id= $spcommand_output[$#spcommand_output];
	print "$job_id\n";
	} else {
	print("There was an error running the SLURM sbatch command.\n" .
	"The command was:\n" .
	"'$command'\n" .
	"and the output was:\n" .
	"'@command_output'\n");
	}

	# If block is true wait for the job to finish
	my($resp, $count);
	my $slurm = Slurm::new();
	if ( (lc($block) eq "true" ) and ($command_exit_status == 0) ) {
	sleep 2;
	my($job) = $slurm->load_job($job_id);
	$resp = $$job{'job_array'}[0]->{job_state};
	while ( $resp < JOB_COMPLETE ) {
	$job = $slurm->load_job($job_id);
	$resp = $$job{'job_array'}[0]->{job_state};
	sleep 1;
	}
	}

	# Exit with the command return code.
	exit($command_exit_status >> 8);
	}

	sub parse_resource_list {
	my ($rl) = @_;
	my %opt = ('accelerator' => "",
	'arch' => "",
	'block' => "",
	'cput' => "",
	'file' => "",
	'host' => "",
	'mem' => "",
	'mpiprocs' => "",
	'ncpus' => "",
	'nice' => "",
	'nodes' => "",
	'naccelerators' => "",
	'opsys' => "",
	'other' => "",
	'pcput' => "",
	'pmem' => "",
	'proc' => '',
	'pvmem' => "",
	'select' => "",
	'software' => "",
	'vmem' => "",
	'walltime' => "",
	# Cray-specific resources
	'mppwidth' => "",
	'mppdepth' => "",
	'mppnppn' => "",
	'mppmem' => "",
	'mppnodes' => ""
	);
	my @keys = keys(%opt);

	# The select option uses a ":" separator rather than ","
	# This wrapper currently does not support multiple select options

	# Protect the colons used to separate elements in walltime=hh:mm:ss.
	# Convert to NNhNNmNNs format.
	$rl =~ s/walltime=(\d{1,2}):(\d{2}):(\d{2})/walltime=$1h$2m$3s/;

	$rl =~ s/:/,/g;
	foreach my $key (@keys) {
	#print "$rl\n";
	($opt{$key}) = $rl =~ m/$key=([\w:\+=+]+)/;

	}

	# If needed, un-protect the walltime string.
	if ($opt{walltime}) {
	$opt{walltime} =~ s/(\d{1,2})h(\d{2})m(\d{2})s/$1:$2:$3/;
	# Convert to minutes for SLURM.
	$opt{walltime} = get_minutes($opt{walltime});
	}

	if($opt{accelerator} && $opt{accelerator} =~ /^[Tt]/ && !$opt{naccelerators}) {
	$opt{naccelerators} = 1;
	}

	if($opt{cput}) {
	$opt{cput} = get_minutes($opt{cput});
	}

	if ($opt{mpiprocs} && (!$opt{mppnppn} \|\| ($opt{mpiprocs} > $opt{mppnppn}))) {
	$opt{mppnppn} = $opt{mpiprocs};
	}

	if($opt{mppmem}) {
	$opt{mem} = convert_mb_format($opt{mppmem});
	} elsif($opt{mem}) {
	$opt{mem} = convert_mb_format($opt{mem});
	}

	if($opt{file}) {
	$opt{file} = convert_mb_format($opt{file});
	}

	return \%opt;
	}

	sub parse_node_opts {
	my ($node_string) = @_;
	my %opt = ('node_cnt' => 0,
	'hostlist' => "",
	'task_cnt' => 0
	);
	while($node_string =~ /ppn=(\d+)/g) {
	$opt{task_cnt} += $1;
	}

	my $hl = Slurm::Hostlist::create("");

	my @parts = split(/\+/, $node_string);
	foreach my $part (@parts) {
	my @sub_parts = split(/:/, $part);
	foreach my $sub_part (@sub_parts) {
	if($sub_part =~ /ppn=(\d+)/) {
	next;
	} elsif($sub_part =~ /^(\d+)/) {
	$opt{node_cnt} += $1;
	} else {
	if(!Slurm::Hostlist::push($hl, $sub_part)) {
	print "problem pushing host $sub_part onto hostlist\n";
	}
	}
	}
	}

	$opt{hostlist} = Slurm::Hostlist::ranged_string($hl);

	my $hl_cnt = Slurm::Hostlist::count($hl);
	$opt{node_cnt} = $hl_cnt if $hl_cnt > $opt{node_cnt};

	return \%opt;
	}

	sub get_minutes {
	my ($duration) = @_;
	$duration = 0 unless $duration;
	my $minutes = 0;

	# Convert [[HH:]MM:]SS to duration in minutes
	if ($duration =~ /^(?:(\d+):)?(\d*):(\d+)$/) {
	my ($hh, $mm, $ss) = ($1 \|\| 0, $2 \|\| 0, $3);
	$minutes += 1 if $ss > 0;
	$minutes += $mm;
	$minutes += $hh * 60;
	} elsif ($duration =~ /^(\d+)$/) { # Convert number in minutes to seconds
	my $mod = $duration % 60;
	$minutes = int($duration / 60);
	$minutes++ if $mod;
	} else { # Unsupported format
	die("Invalid time limit specified ($duration)\n");
	}

	return $minutes;
	}

	sub convert_mb_format {
	my ($value) = @_;
	my ($amount, $suffix) = $value =~ /(\d+)($\|[KMGT])/i;
	return if !$amount;
	$suffix = lc($suffix);

	if (!$suffix) {
	$amount /= 1048576;
	} elsif ($suffix eq "k") {
	$amount /= 1024;
	} elsif ($suffix eq "m") {
	#do nothing this is what we want.
	} elsif ($suffix eq "g") {
	$amount *= 1024;
	} elsif ($suffix eq "t") {
	$amount *= 1048576;
	} else {
	print "don't know what to do with suffix $suffix\n";
	return;
	}

	$amount .= "M";

	return $amount;
	}
	##############################################################################

	__END__

	=head1 NAME

	B<qsub> - submit a batch job in a familiar pbs format

	=head1 SYNOPSIS

	qsub [-a start_time]
	[-A account]
	[-e err_path]
	[-I]
	[-l resource_list]
	[-m mail_options] [-M user_list]
	[-N job_name]
	[-o out_path]
	[-p priority]
	[-q destination]
	[-v variable_list]
	[-W additional_attributes]
	[-h]
	[script]

	=head1 DESCRIPTION

	The B<qsub> submits batch jobs. It is aimed to be feature-compatible with PBS' qsub.

	=head1 OPTIONS

	=over 4

	=item B<-a>

	Earliest start time of job. Format: [HH:MM][MM/DD/YY]

	=item B<-A account>

	Specify the account to which the job should be charged.

	=item B<-e err_path>

	Specify a new path to receive the standard error output for the job.

	=item B<-I>

	Interactive execution.

	=item B<-J job_array>

	Job array index values. The -J and -t options are equivalent.

	=item B<-l resource_list>

	Specify an additional list of resources to request for the job.

	=item B<-m mail_options>

	Specify a list of events on which email is to be generated.

	=item B<-M user_list>

	Specify a list of email addresses to receive messages on specified events.

	=item B<-N job_name>

	Specify a name for the job.

	=item B<-o out_path>

	Specify the path to a file to hold the standard output from the job.

	=item B<-p priority>

	Specify the priority under which the job should run.

	=item B<-p priority>

	Specify the priority under which the job should run.

	=item B<-t job_array>

	Job array index values. The -J and -t options are equivalent.

	=item B<-v> [variable_list]

	Exporting single variables via -v is generally not required, since the entire
	login environment is exported by the default. However this option can be used
	to add newly defined environment variables to specific jobs.

	=item B<-V>

	The -V option to export the current environment is not required since it is
	done by default.

	=item B<-?> \| B<--help>

	brief help message

	=item B<--man>

	full documentation

	=back

	=cut