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Implemented --controlmaster. It fails under stress, so experimental and no unittest

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Ole Tange 2010-06-01 03:31:46 +02:00
parent b52c1e43df
commit e99bdb0b82
2 changed files with 54 additions and 26 deletions
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25
doc/FUTURE_IDEAS
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@ -1,12 +1,9 @@
=head1 IDEAS
One char options not used: F G J K M P Q Y
One char options not used: F G J K P Q Y
Test if -0 works on filenames ending in '\n'
xargs dropin-replacement.
Implement the missing --features
monitor to see which jobs are currently running
http://code.google.com/p/ppss/
@ -19,31 +16,15 @@ If there are nomore jobs (STDIN is closed) then make sure to
distribute the arguments evenly if running -X.
Distribute jobs to computers with different speeds/number-of-cpu-cores using ssh
ask the computers how many cpus they have and spawn appropriately
according to -j setting. Reuse ssh connection (-M and -S)
Start by porting everything to use sshlogin :.
Reuse ssh connection (-M and -S) if not using own ssh command.
SEED=$RANDOM
ssh -MS /tmp/ssh-%r@%h:%p-$SEED elvis
ssh -MST /tmp/ssh-%r@%h:%p-$SEED elvis
rsync --rsh="ssh -S /tmp/ssh-%r@%h:%p-$SEED" gitup elvis:/tmp/
ssh -S /tmp/ssh-%r@%h:%p-$SEED elvis hostname
FILE=gpl-3.0.txt
BASE=gpl-3.0
$ rsync -z $FILE e:$FILE
$ ssh e "cat $FILE | bzip2 > $BASE.bz2"
$ rsync -z e:$BASE.bz2 $BASE.bz2
$ ssh e "rm $FILE $BASE"
http://www.semicomplete.com/blog/geekery/distributed-xargs.html?source=rss20
http://code.google.com/p/ppss/wiki/Manual2
http://www.gnu.org/software/pexec/
Where will '>' be run? Local or remote? Remote.
Parallelize so this can be done:
mdm.screen find dir -execdir mdm-run cmd {} \;

53
src/parallel
View file

@ -242,6 +242,14 @@ Keep sequence of output same as the order of input. If jobs 1 2 3 4
end in the sequence 3 1 4 2 the output will still be 1 2 3 4.
=item B<--controlmaster> (experimental)
=item B<-M> (experimental)
Use ssh's ControlMaster to make ssh connections faster. Useful if jobs
run remote and are very fast to run.
=item B<--max-args>=I<max-args>
=item B<-n> I<max-args>
@ -1286,9 +1294,9 @@ use File::Temp qw/ tempfile tempdir /;
use Getopt::Long;
use strict;
DoNotReap();
parse_options();
init_run_jobs();
DoNotReap();
start_more_jobs();
ReapIfNeeded();
drain_job_queue();
@ -1333,6 +1341,7 @@ sub parse_options {
"use-cpus-instead-of-cores" => \$::opt_use_cpus_instead_of_cores,
"sshlogin|S=s" => \@::opt_sshlogin,
"sshloginfile=s" => \$::opt_sshloginfile,
"controlmaster|M" => \$::opt_controlmaster,
"return=s" => \@::opt_return,
"trc=s" => \@::opt_trc,
"transfer" => \$::opt_transfer,
@ -2032,6 +2041,8 @@ sub min {
# $Global::host{$sshlogin}{'ncpus'} = number of cpus
# $Global::host{$sshlogin}{'maxlength'} = max line length (currently buggy for remote)
# $Global::host{$sshlogin}{'max_no_of_running'} = number of currently running jobs
# $Global::host{$sshlogin}{'sshcmd'} = command to use as ssh
# $Global::host{$sshlogin}{'serverlogin'} = username@hostname
# $Global::running_jobs = total number of running jobs
sub init_run_jobs {
@ -2362,7 +2373,7 @@ sub parse_sshlogin {
}
sub sshcommand_of_sshlogin {
# 'server' -> ('ssh','server')
# 'server' -> ('ssh -S /tmp/parallel-ssh-RANDOM/host-','server')
# 'user@server' -> ('ssh','user@server')
# 'myssh user@server' -> ('myssh','user@server')
# 'myssh -l user server' -> ('myssh -l user','server')
@ -2370,13 +2381,41 @@ sub sshcommand_of_sshlogin {
my $sshlogin = shift;
my ($sshcmd, $serverlogin);
if($sshlogin =~ /(.+) (\S+)$/) {
# Own ssh command
$sshcmd = $1; $serverlogin = $2;
} else {
# Normal ssh
if($::opt_controlmaster) {
# Use control_path to make ssh faster
my $control_path = control_path_dir()."/ssh-%r@%h:%p";
$sshcmd = "ssh -S ".$control_path;
$serverlogin = $sshlogin;
#my $master = "ssh -MTS ".control_path_dir()."/ssh-%r@%h:%p ".$serverlogin;
my $master = "ssh -MTS ".control_path_dir()."/ssh-%r@%h:%p ".$serverlogin." sleep 1";
if(not $Global::control_path{$control_path}++) {
my $pid = fork();
if($pid) {
$Global::sshmaster{$pid}++;
} else {
debug($master,"\n");
`$master`;
exit;
}
}
} else {
$sshcmd = "ssh"; $serverlogin = $sshlogin;
}
}
return ($sshcmd, $serverlogin);
}
sub control_path_dir {
if(not $Global::control_path_dir) {
$Global::control_path_dir = tempdir("/tmp/parallel-ssh-XXXX", CLEANUP => 1 );
}
return $Global::control_path_dir;
}
#
# Signal handling
@ -2426,6 +2465,10 @@ sub Reaper {
my $stiff;
debug("Reaper called $Global::reaperlevel\n");
while (($stiff = waitpid(-1, &WNOHANG)) > 0) {
if($Global::sshmaster{$stiff}) {
# This is one of the ssh -M: ignore
next;
}
if($Global::keeporder) {
$Global::print_later{$Global::running{$stiff}{"seq"}} = $Global::running{$stiff};
debug("died: $Global::running{$stiff}{'seq'}");
@ -2560,7 +2603,8 @@ $main::opt_X = $main::opt_x = $main::opt_k = $main::opt_d =
$main::opt_P = $main::opt_i = $main::opt_p = $main::opt_a =
$main::opt_version = $main::opt_L = $main::opt_l =
$main::opt_show_limits = $main::opt_n = $main::opt_e = $main::opt_verbose =
$main::opt_E = $main::opt_r = $Global::xargs = $Global::keeporder = 0;
$main::opt_E = $main::opt_r = $Global::xargs = $Global::keeporder =
$Global::control_path = 0;
# Hvordan udregnes system limits på remote systems hvis jeg ikke ved, hvormange
# argumenter, der er? Lav system limits lokalt og lad det være max
@ -2570,6 +2614,9 @@ $main::opt_E = $main::opt_r = $Global::xargs = $Global::keeporder = 0;
# TODO Unittest with filename that is long and requires a lot of quoting. Will there be to many
# TODO --max-number-of-jobs print the system limited number of jobs
# TODO Debian package
# TODO environment variable and .parallelrc
#=item B<--sshlogin> I<[ncpu/]sshlogin[,[ncpu/]sshlogin[,...]]> (beta testing)
# Skilletegn:
# No: "#!&()?\<>|;*'~ shellspecial