mirror of
https://git.savannah.gnu.org/git/parallel.git
synced 2024-11-25 23:47:53 +00:00
src/parallel: Implemented --compress(-program). Test suite missing.
This commit is contained in:
Ole Tange
parent
59fd5ed103
commit
56be1f38c3
|
|
@ -201,71 +201,17 @@ cc:Sandro Cazzaniga <kharec@mandriva.org>,
|
|||
Ryoichiro Suzuki <ryoichiro.suzuki@gmail.com>,
|
||||
Jesse Alama <jesse.alama@gmail.com>
|
||||
|
||||
Subject: GNU Parallel 20131022 ('Westgate') released
|
||||
Subject: GNU Parallel 20131122 ('') released
|
||||
|
||||
GNU Parallel 20131022 ('Westgate') has been released. It is
|
||||
GNU Parallel 20131122 ('') has been released. It is
|
||||
available for download at: http://ftp.gnu.org/gnu/parallel/
|
||||
|
||||
New in this release:
|
||||
|
||||
* --transfer files with /./ in the path will copy the files relative
|
||||
to the --workdir.
|
||||
*
|
||||
|
||||
* The maximal command length is now cached in a file halfing the
|
||||
startup time.
|
||||
|
||||
* GNU Parallel was cited in: Investigating speaker gender using rhythm
|
||||
metrics in Arabic dialects
|
||||
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6602389&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6602389
|
||||
|
||||
* GNU Parallel was cited in: Tiedon erist ̈minen ja visualisointi a
|
||||
lastensuojelun asiakaskertomuksista
|
||||
https://tampub.uta.fi/handle/10024/84978
|
||||
|
||||
* Some Additional Useful Bioinformatics Software
|
||||
http://nix-bio.blogspot.dk/2013/10/additional-software-for-bioinformatics.html
|
||||
|
||||
* GNU Parallel Example Screen Cast (bil to Geotiff conversion)
|
||||
http://www.youtube.com/watch?v=PpF27eC7Mys
|
||||
|
||||
* Using GNU Parallel to roll-your-own Map Reduce!
|
||||
http://www.rankfocus.com/hello-world/
|
||||
|
||||
* Use multiple CPU Cores with your Linux commands
|
||||
http://www.rankfocus.com/use-cpu-cores-linux-commands/
|
||||
|
||||
* Using GNU Parallel at HPC @ Uni.lu
|
||||
https://hpc.uni.lu/users/use_cases/
|
||||
|
||||
* Scaling up with parallelization
|
||||
https://www.msi.umn.edu/sites/default/files/AdvPython_1.pdf
|
||||
|
||||
* How to teach yourself to be a technical tester
|
||||
http://infiniteundo.com/post/62421363463/qa-toc
|
||||
|
||||
* Faster Rasters For All
|
||||
http://2013.foss4g.org/conf/programme/presentations/52/
|
||||
|
||||
* Optimizing translated file downloads
|
||||
http://www.smartling.com/blog/2013/05/20/optimizing-translated-file-downloads/
|
||||
|
||||
* EMC NetWorker parallel saveset cloning with nsrclone and GNU parallel
|
||||
http://www.beebotech.com.au/2013/10/emc-networker-parallel-saveset-cloning-with-nsrclone-and-gnu-parallel/
|
||||
|
||||
* Best Practices for Amazon EMR
|
||||
http://media.amazonwebservices.com/AWS_Amazon_EMR_Best_Practices.pdf
|
||||
|
||||
* Computing checksums for backup
|
||||
https://identi.ca/evan/note/6yf1GzAARtyBhj__xzMvAg
|
||||
|
||||
* Un exemplu de utilizare a programului GNU parallel
|
||||
http://vundicind.blogspot.dk/2013/10/exemplu-utilizare-gnu-parallel.html
|
||||
|
||||
* 平行化你的工作
|
||||
http://www.slideshare.net/drakeguan/part1-23705978
|
||||
|
||||
* なんか気持ちよかです Gnu Parallel
|
||||
http://a3-lab.jpn.org/note/%E3%81%AA%E3%82%93%E3%81%8B%E6%B0%97%E6%8C%81%E3%81%A1%E3%82%88%E3%81%8B%E3%81%A7%E3%81%99-gnu-parallel
|
||||
* 如何利用多核CPU來加速你的Linux命令 — awk, sed, bzip2, grep, wc等
|
||||
http://www.hksilicon.com/kb/articles/290543/CPULinuxawk-sed-bzip2-grep-wc
|
||||
|
||||
* Bug fixes and man page updates.
|
||||
|
||||
|
|
|
|||
179
src/parallel
179
src/parallel
|
|
@ -694,6 +694,8 @@ sub options_hash {
|
|||
"W=s" => \$opt::retired,
|
||||
"tmpdir=s" => \$opt::tmpdir,
|
||||
"tempdir=s" => \$opt::tmpdir,
|
||||
"use-compress-program|compress-program=s" => \$opt::compress_program,
|
||||
"compress" => \$opt::compress,
|
||||
"tty" => \$opt::tty,
|
||||
"T" => \$opt::retired,
|
||||
"halt-on-error|halt=i" => \$opt::halt_on_error,
|
||||
|
|
@ -901,6 +903,15 @@ sub parse_options {
|
|||
# Set --delay to --sshdelay if not set
|
||||
$opt::delay = $opt::sshdelay;
|
||||
}
|
||||
if($opt::compress_program) {
|
||||
$opt::compress = 1;
|
||||
$opt::decompress_program = $opt::compress_program." -dc";
|
||||
}
|
||||
if($opt::compress) {
|
||||
my ($compress, $decompress) = find_compression_program();
|
||||
$opt::compress_program ||= $compress;
|
||||
$opt::decompress_program ||= $decompress;
|
||||
}
|
||||
if($opt::tollef and not $opt::gnu and not $opt::plain) {
|
||||
# Behave like tollef parallel (from moreutils)
|
||||
if($Global::version > 2014_02_22) {
|
||||
|
|
@ -1179,10 +1190,37 @@ sub open_joblog {
|
|||
}
|
||||
}
|
||||
|
||||
sub find_compression_program {
|
||||
# Find a fast compression program
|
||||
# Returns:
|
||||
# $compress_program = compress program with options
|
||||
# $decompress_program = decompress program with options
|
||||
|
||||
# Search for these. Sorted by speed
|
||||
my @prg = qw(lzop pigz gzip pbzip2 plzip bzip2 lzma lzip xz);
|
||||
for my $p (@prg) {
|
||||
if(which($p)) {
|
||||
return ("$p -c -1","$p -dc");
|
||||
}
|
||||
}
|
||||
# Fall back to cat
|
||||
return ("cat","cat");
|
||||
}
|
||||
|
||||
sub which {
|
||||
# Input:
|
||||
# $program = program to find the path to
|
||||
# Returns:
|
||||
# $full_path = full path to $program. undef if not found
|
||||
my $program = $_[0];
|
||||
|
||||
return (grep { -e $_."/".$program } split(":",$ENV{'PATH'}))[0];
|
||||
}
|
||||
|
||||
sub read_options {
|
||||
# Read options from command line, profile and $PARALLEL
|
||||
# Returns:
|
||||
# @ARGV without --options
|
||||
# @ARGV_no_opt = @ARGV without --options
|
||||
# This must be done first as this may exec myself
|
||||
if(defined $ARGV[0] and ($ARGV[0]=~/^--shebang/ or
|
||||
$ARGV[0]=~/^--shebang-?wrap/ or
|
||||
|
|
@ -1271,9 +1309,10 @@ sub read_args_from_command_line {
|
|||
# Removes the arguments from @ARGV and:
|
||||
# - puts filenames into -a
|
||||
# - puts arguments into files and add the files to -a
|
||||
# Input:
|
||||
# @::ARGV = command option ::: arg arg arg :::: argfiles
|
||||
# Returns:
|
||||
# @ARGV without ::: and :::: and following args
|
||||
# Input: @ARGV = command option ::: arg arg arg :::: argfiles
|
||||
# @argv_no_argsep = @::ARGV without ::: and :::: and following args
|
||||
my @new_argv = ();
|
||||
for(my $arg = shift @ARGV; @ARGV; $arg = shift @ARGV) {
|
||||
if($arg eq $Global::arg_sep
|
||||
|
|
@ -1356,9 +1395,11 @@ sub shell_quote_empty {
|
|||
|
||||
sub shell_quote_scalar {
|
||||
# Quote the string so shell will not expand any special chars
|
||||
# Inputs:
|
||||
# $string = string to be quoted
|
||||
# Returns:
|
||||
# string quoted with \ as needed by the shell
|
||||
my $a = shift;
|
||||
# $shell_quoted = string quoted with \ as needed by the shell
|
||||
my $a = $_[0];
|
||||
if(defined $a) {
|
||||
$a =~ s/([\002-\011\013-\032\\\#\?\`\(\)\{\}\[\]\*\>\<\~\|\; \"\!\$\&\'\202-\377])/\\$1/g;
|
||||
$a =~ s/[\n]/'\n'/g; # filenames with '\n' is quoted using \'
|
||||
|
|
@ -1368,8 +1409,10 @@ sub shell_quote_scalar {
|
|||
|
||||
sub shell_quote_file {
|
||||
# Quote the string so shell will not expand any special chars and prepend ./ if needed
|
||||
# Input:
|
||||
# $filename = filename to be shell quoted
|
||||
# Returns:
|
||||
# string quoted with \ as needed by the shell and ./ if needed
|
||||
# $quoted_filename = filename quoted with \ as needed by the shell and ./ if needed
|
||||
my $a = shell_quote_scalar(shift);
|
||||
if(defined $a) {
|
||||
if($a =~ m:^/: or $a =~ m:^\./:) {
|
||||
|
|
@ -1382,30 +1425,14 @@ sub shell_quote_file {
|
|||
return $a;
|
||||
}
|
||||
|
||||
sub shell_quote_files {
|
||||
# Quote the strings so shell will not expand any special chars and prepend ./ if needed
|
||||
# Returns:
|
||||
# strings quoted with \ as needed by the shell and ./ if needed
|
||||
my @strings = shell_quote(@_);
|
||||
for my $a (@strings) {
|
||||
if(defined $a) {
|
||||
if($a =~ m:^/: or m:\./:) {
|
||||
# /abs/path or ./rel/path => skip
|
||||
} else {
|
||||
# rel/path => ./rel/path
|
||||
$a = "./".$a;
|
||||
}
|
||||
}
|
||||
}
|
||||
return @strings;;
|
||||
}
|
||||
|
||||
sub maybe_quote {
|
||||
# If $Global::quoting then quote the string so shell will not expand any special chars
|
||||
# If $Global::quoting is set then quote the string so shell will not expand any special chars
|
||||
# Else do not quote
|
||||
# Inputs:
|
||||
# $string = string to be quoted
|
||||
# Returns:
|
||||
# if $Global::quoting string quoted with \ as needed by the shell
|
||||
# else string unaltered
|
||||
# $maybe_quoted_string = $string quoted if needed
|
||||
if($Global::quoting) {
|
||||
return shell_quote_scalar(@_);
|
||||
} else {
|
||||
|
|
@ -1416,9 +1443,10 @@ sub maybe_quote {
|
|||
sub maybe_unquote {
|
||||
# If $Global::quoting then unquote the string as shell would
|
||||
# Else do not unquote
|
||||
# Inputs:
|
||||
# $maybe_quoted_string = string to be maybe unquoted
|
||||
# Returns:
|
||||
# if $Global::quoting string unquoted as done by the shell
|
||||
# else string unaltered
|
||||
# $string = $maybe_quoted_string unquoted if needed
|
||||
if($Global::quoting) {
|
||||
return shell_unquote(@_);
|
||||
} else {
|
||||
|
|
@ -1428,8 +1456,10 @@ sub maybe_unquote {
|
|||
|
||||
sub shell_unquote {
|
||||
# Unquote strings from shell_quote
|
||||
# Inputs:
|
||||
# @strings = strings to be unquoted
|
||||
# Returns:
|
||||
# string with shell quoting removed
|
||||
# @unquoted_strings = @strings with shell quoting removed
|
||||
my @strings = (@_);
|
||||
my $arg;
|
||||
for my $arg (@strings) {
|
||||
|
|
@ -1492,9 +1522,11 @@ sub enough_file_handles {
|
|||
}
|
||||
|
||||
sub open_or_exit {
|
||||
# Open a file name or exit if the fille cannot be opened
|
||||
# Inputs:
|
||||
# $file = filehandle or filename to open
|
||||
# Returns:
|
||||
# file handle to read-opened file
|
||||
# exits if file cannot be opened
|
||||
# $fh = file handle to read-opened file
|
||||
my $file = shift;
|
||||
if($file eq "-") {
|
||||
$Global::stdin_in_opt_a = 1;
|
||||
|
|
@ -1532,8 +1564,14 @@ sub init_run_jobs {
|
|||
}
|
||||
|
||||
sub start_more_jobs {
|
||||
# Run start_another_job() but only if:
|
||||
# * not $Global::start_no_new_jobs set
|
||||
# * not JobQueue is empty
|
||||
# * not load on server is too high
|
||||
# * not server swapping
|
||||
# * not too short time since last remote login
|
||||
# Returns:
|
||||
# number of jobs started
|
||||
# $jobs_started = number of jobs started
|
||||
my $jobs_started = 0;
|
||||
my $jobs_started_this_round = 0;
|
||||
if($Global::start_no_new_jobs) {
|
||||
|
|
@ -1592,8 +1630,14 @@ sub start_more_jobs {
|
|||
}
|
||||
|
||||
sub start_another_job {
|
||||
# Grab a job from Global::JobQueue, start it at sshlogin
|
||||
# and remember the pid, the STDOUT and the STDERR handles
|
||||
# If there are enough filehandles
|
||||
# and JobQueue not empty
|
||||
# and not $job is in joblog
|
||||
# Then grab a job from Global::JobQueue,
|
||||
# start it at sshlogin
|
||||
# mark it as virgin_job
|
||||
# Inputs:
|
||||
# $sshlogin = the SSHLogin to start the job on
|
||||
# Returns:
|
||||
# 1 if another jobs was started
|
||||
# 0 otherwise
|
||||
|
|
@ -3872,8 +3916,10 @@ sub seq {
|
|||
}
|
||||
|
||||
sub openoutputfiles {
|
||||
# Open files for STDOUT and STDERR
|
||||
# Set file handles in $self->fd and possibly $self->fd_input
|
||||
my $self = shift;
|
||||
my ($outfh,$errfh,$outname,$errname);
|
||||
my ($outfh, $errfh, $outname, $errname);
|
||||
if($opt::results) {
|
||||
my $args_as_dirname = $self->{'commandline'}->args_as_dirname();
|
||||
# prefix/name1/val1/name2/val2/
|
||||
|
|
@ -3881,27 +3927,40 @@ sub openoutputfiles {
|
|||
File::Path::mkpath($dir);
|
||||
# prefix/name1/val1/name2/val2/stdout
|
||||
$outname = "$dir/stdout";
|
||||
if(not open($outfh,"+>",$outname)) {
|
||||
if(not open($outfh, "+>", $outname)) {
|
||||
::error("Cannot write to `$outname'.\n");
|
||||
::wait_and_exit(255);
|
||||
}
|
||||
# prefix/name1/val1/name2/val2/stderr
|
||||
$errname = "$dir/stderr";
|
||||
if(not open($errfh,"+>",$errname)) {
|
||||
if(not open($errfh, "+>", $errname)) {
|
||||
::error("Cannot write to `$errname'.\n");
|
||||
::wait_and_exit(255);
|
||||
}
|
||||
} elsif($Global::grouped) {
|
||||
# To group we create temporary files for STDOUT and STDERR
|
||||
# To avoid the cleanup unlink the files immediately (but keep them open)
|
||||
($outfh, $outname) = ::tempfile(SUFFIX => ".par");
|
||||
($errfh, $errname) = ::tempfile(SUFFIX => ".par");
|
||||
if(@Global::tee_jobs) {
|
||||
if($opt::compress) {
|
||||
my($i_outfh,$i_errfh);
|
||||
($i_outfh, $outname) = ::tempfile(SUFFIX => ".par");
|
||||
($i_errfh, $errname) = ::tempfile(SUFFIX => ".par");
|
||||
$self->set_fd_input(1, $i_outfh);
|
||||
$self->set_fd_input(2, $i_errfh);
|
||||
my $rm = $Global::debug ? "true" : "rm";
|
||||
::debug("| ($rm $outname; $opt::compress_program) > $outname\n");
|
||||
open($outfh,"|-","($rm $outname; $opt::compress_program) > $outname") || die $?;
|
||||
::debug("| ($rm $errname; $opt::compress_program) > $errname\n");
|
||||
open($errfh,"|-","($rm $errname; $opt::compress_program) > $errname") || die $?;
|
||||
} elsif(@Global::tee_jobs) {
|
||||
# files must be removed when the tee is done
|
||||
} elsif($opt::files) {
|
||||
($outfh, $outname) = ::tempfile(SUFFIX => ".par");
|
||||
($errfh, $errname) = ::tempfile(SUFFIX => ".par");
|
||||
# --files => only remove stderr
|
||||
unlink $errname;
|
||||
} else {
|
||||
($outfh, $outname) = ::tempfile(SUFFIX => ".par");
|
||||
($errfh, $errname) = ::tempfile(SUFFIX => ".par");
|
||||
unlink $outname;
|
||||
unlink $errname;
|
||||
}
|
||||
|
|
@ -3921,18 +3980,27 @@ sub openoutputfiles {
|
|||
|
||||
sub set_fd {
|
||||
# Set file descriptor
|
||||
my $self = shift;
|
||||
my $fd_no = shift;
|
||||
$self->{'fd'}{$fd_no} = shift;
|
||||
my ($self, $fd_no, $fd) = @_;
|
||||
$self->{'fd'}{$fd_no} = $fd;
|
||||
}
|
||||
|
||||
sub fd {
|
||||
# Get file descriptor
|
||||
my $self = shift;
|
||||
my $fd_no = shift;
|
||||
my ($self, $fd_no) = @_;
|
||||
return $self->{'fd'}{$fd_no};
|
||||
}
|
||||
|
||||
sub set_fd_input {
|
||||
my ($self, $fd_no, $fd_input) = @_;
|
||||
$self->{'fd_input'}{$fd_no} = $fd_input;
|
||||
}
|
||||
|
||||
sub fd_input {
|
||||
# Get input file descriptor
|
||||
my ($self, $fd_no) = @_;
|
||||
return $self->{'fd_input'}{$fd_no};
|
||||
}
|
||||
|
||||
sub set_fd_file_name {
|
||||
# Set file name for a file descriptor
|
||||
my $self = shift;
|
||||
|
|
@ -4734,7 +4802,24 @@ sub print {
|
|||
}
|
||||
} else {
|
||||
my $buf;
|
||||
if($opt::compress) {
|
||||
# Close for writing so the compressor can finish up
|
||||
# (Are we really sure it finishes? Potential bug)
|
||||
close($in_fd);
|
||||
# Save STDIN file handle
|
||||
open(my $stdin_copy, "<&", "STDIN") or ::die_bug("Can't dup STDIN: $!");
|
||||
my $fd = $self->fd_input($fdno);
|
||||
# Replace STDIN with the file on disk
|
||||
open(STDIN, "<&", $fd);
|
||||
::debug("$opt::decompress_program |");
|
||||
# Start decompression with the fake STDIN
|
||||
open($in_fd, "-|", $opt::decompress_program) ||
|
||||
::die_bug("Decompressing failed ($opt::decompress_program): $!");
|
||||
# Put STDIN file handle back
|
||||
open(STDIN, "<&", $stdin_copy) or ::die_bug("Can't dup STDIN: $!");
|
||||
} else {
|
||||
seek $in_fd, 0, 0;
|
||||
}
|
||||
if($opt::tag or defined $opt::tagstring) {
|
||||
my $tag = $self->tag();
|
||||
if($fdno == 2) {
|
||||
|
|
@ -4756,7 +4841,7 @@ sub print {
|
|||
if($fdno == 2) {
|
||||
# OpenSSH_3.6.1p2 gives 'tcgetattr: Invalid argument' with -tt
|
||||
# This is a crappy way of ignoring it.
|
||||
sysread($in_fd,$buf,1_000_000);
|
||||
sysread($in_fd,$buf,1_000);
|
||||
$buf =~ s/^tcgetattr: Invalid argument\n//;
|
||||
print $out_fd $buf;
|
||||
}
|
||||
|
|
@ -5243,7 +5328,7 @@ sub replaced {
|
|||
if($self->{'replaced'} =~ /^\s*(-\S+)/) {
|
||||
# Is this really a command in $PATH starting with '-'?
|
||||
my $cmd = $1;
|
||||
if(not grep { -e $_."/".$cmd } split(":",$ENV{'PATH'})) {
|
||||
if(not which($cmd)) {
|
||||
::error("Command ($cmd) starts with '-'. Is this a wrong option?\n");
|
||||
::wait_and_exit(255);
|
||||
}
|
||||
|
|
|
|||
BIN
src/parallel.pdf
BIN
src/parallel.pdf
Binary file not shown.
|
|
@ -395,6 +395,24 @@ I<regexp> is a Perl Regular Expression:
|
|||
http://perldoc.perl.org/perlre.html
|
||||
|
||||
|
||||
=item B<--compress> (pre-alpha testing)
|
||||
|
||||
Compress temporary files. If the output is big and very compressible
|
||||
this will take up less disk space in $TMPDIR and possibly be faster due to less
|
||||
disk I/O.
|
||||
|
||||
GNU B<parallel> will try B<lzop>, B<pigz>, B<gzip>, B<pbzip2>,
|
||||
B<plzip>, B<bzip2>, B<lzma>, B<lzip>, B<xz> in that order, and use the
|
||||
first available.
|
||||
|
||||
|
||||
=item B<--compress-program> I<prg> (pre-alpha testing)
|
||||
|
||||
Use I<prg> for compressing temporary files. It is assumed that I<prg
|
||||
-dc> will decompress stdin (standard input) to stdout (standard
|
||||
output).
|
||||
|
||||
|
||||
=item B<--ctrlc>
|
||||
|
||||
Sends SIGINT to tasks running on remote computers thus killing them.
|
||||
|
|
@ -2543,32 +2561,16 @@ computers:
|
|||
|
||||
B<echo >>B<jobqueue>; B<tail -f jobqueue | parallel -S ..>
|
||||
|
||||
There are a two small issues when using GNU B<parallel> as queue
|
||||
system/batch manager:
|
||||
|
||||
=over 2
|
||||
|
||||
=item *
|
||||
|
||||
You will get a warning if you do not submit JobSlots jobs within
|
||||
the first second. E.g. if you have 8 cores and use -j+2 you have to
|
||||
submit 10 jobs. These can be dummy jobs (e.g. echo foo). You can also
|
||||
simply ignore the warning. For parallel versions 20110322 and higher,
|
||||
the warnings will not appear.
|
||||
|
||||
=item *
|
||||
|
||||
You have to submit JobSlot number of jobs before they will start, and
|
||||
after that you can submit one at a time, and job will start
|
||||
immediately if free slots are available. Output from the running or
|
||||
completed jobs are held back and will only be printed when JobSlots
|
||||
more jobs has been started (unless you use --ungroup or -u, in which
|
||||
case the output from the jobs are printed immediately). E.g. if you
|
||||
have 10 jobslots then the output from the first completed job will
|
||||
only be printed when job 11 has started, and the output of second
|
||||
completed job will only be printed when job 12 has started.
|
||||
|
||||
=back
|
||||
There is a a small issue when using GNU B<parallel> as queue
|
||||
system/batch manager: You have to submit JobSlot number of jobs before
|
||||
they will start, and after that you can submit one at a time, and job
|
||||
will start immediately if free slots are available. Output from the
|
||||
running or completed jobs are held back and will only be printed when
|
||||
JobSlots more jobs has been started (unless you use --ungroup or -u,
|
||||
in which case the output from the jobs are printed immediately).
|
||||
E.g. if you have 10 jobslots then the output from the first completed
|
||||
job will only be printed when job 11 has started, and the output of
|
||||
second completed job will only be printed when job 12 has started.
|
||||
|
||||
|
||||
=head1 EXAMPLE: GNU Parallel as dir processor
|
||||
|
|
|
|||
|
|
@ -418,6 +418,24 @@ separating the columns. The n'th column can be access using
|
|||
@emph{regexp} is a Perl Regular Expression:
|
||||
http://perldoc.perl.org/perlre.html
|
||||
|
||||
@item @strong{--compress} (pre-alpha testing)
|
||||
@anchor{@strong{--compress} (pre-alpha testing)}
|
||||
|
||||
Compress temporary files. If the output is big and very compressible
|
||||
this will take up less disk space in $TMPDIR and possibly be faster due to less
|
||||
disk I/O.
|
||||
|
||||
GNU @strong{parallel} will try @strong{lzop}, @strong{pigz}, @strong{gzip}, @strong{pbzip2},
|
||||
@strong{plzip}, @strong{bzip2}, @strong{lzma}, @strong{lzip}, @strong{xz} in that order, and use the
|
||||
first available.
|
||||
|
||||
@item @strong{--compress-program} @emph{prg} (pre-alpha testing)
|
||||
@anchor{@strong{--compress-program} @emph{prg} (pre-alpha testing)}
|
||||
|
||||
Use @emph{prg} for compressing temporary files. It is assumed that @emph{prg
|
||||
-dc} will decompress stdin (standard input) to stdout (standard
|
||||
output).
|
||||
|
||||
@item @strong{--ctrlc}
|
||||
@anchor{@strong{--ctrlc}}
|
||||
|
||||
|
|
@ -2751,27 +2769,16 @@ computers:
|
|||
|
||||
@strong{echo }>@strong{jobqueue}; @strong{tail -f jobqueue | parallel -S ..}
|
||||
|
||||
There are a two small issues when using GNU @strong{parallel} as queue
|
||||
system/batch manager:
|
||||
|
||||
@itemize
|
||||
@item You will get a warning if you do not submit JobSlots jobs within
|
||||
the first second. E.g. if you have 8 cores and use -j+2 you have to
|
||||
submit 10 jobs. These can be dummy jobs (e.g. echo foo). You can also
|
||||
simply ignore the warning. For parallel versions 20110322 and higher,
|
||||
the warnings will not appear.
|
||||
|
||||
@item You have to submit JobSlot number of jobs before they will start, and
|
||||
after that you can submit one at a time, and job will start
|
||||
immediately if free slots are available. Output from the running or
|
||||
completed jobs are held back and will only be printed when JobSlots
|
||||
more jobs has been started (unless you use --ungroup or -u, in which
|
||||
case the output from the jobs are printed immediately). E.g. if you
|
||||
have 10 jobslots then the output from the first completed job will
|
||||
only be printed when job 11 has started, and the output of second
|
||||
completed job will only be printed when job 12 has started.
|
||||
|
||||
@end itemize
|
||||
There is a a small issue when using GNU @strong{parallel} as queue
|
||||
system/batch manager: You have to submit JobSlot number of jobs before
|
||||
they will start, and after that you can submit one at a time, and job
|
||||
will start immediately if free slots are available. Output from the
|
||||
running or completed jobs are held back and will only be printed when
|
||||
JobSlots more jobs has been started (unless you use --ungroup or -u,
|
||||
in which case the output from the jobs are printed immediately).
|
||||
E.g. if you have 10 jobslots then the output from the first completed
|
||||
job will only be printed when job 11 has started, and the output of
|
||||
second completed job will only be printed when job 12 has started.
|
||||
|
||||
@chapter EXAMPLE: GNU Parallel as dir processor
|
||||
@anchor{EXAMPLE: GNU Parallel as dir processor}
|
||||
|
|
|
|||
Loading…
Reference in a new issue