Thanks for the info.
I have used the shell redirection stuff to capture stdout/stderr from
programs. But this time I'm trying to do a parallel rsync from a single
server to multiple clients all at the same time. The server has 2G RAM
and can handle the concurrent rsyncs.
My problem is probably a perl programming problem and not a rsync one,
but the 'log' feature in rsync would help me a lot. The following
skeleton of perl shows what I'm trying to do. The perl 'open' command is
really a popen system call that starts a child process to handle the
rsync.
The reason I wanted to use the rsync logfile feature is it seems the
children and parent all share the same stdout and the individual '>>'s
don't catch the right output. If I start a parallel rsync to 8 hosts,
all the stdout gets mangled.
Any other ideas?
eric
FROM THE PERLIPC MAN PAGE
Filehandles
Both the main process and any child processes it forks
share the same STDIN, STDOUT, and STDERR filehandles. If
both processes try to access them at once, strange things
can happen.
FROM MY ATTEMPT AT A PARALLEL RSYNC IN PERL
foreach $dir (@dirs) {
# inner loop hosts -- do these all in parallel (at the same time)
foreach $host (@hosts) {
$cmd="/usr/local/bin/rsync -a --delete -e '/usr/local/bin/ssh '
--log-format=\"$host %o %f %l %b\" --timeout 1800 $compress --exclude
'apps/.snapshot/*' /home/apps/${dir} ${host}:/home/apps\n";
print "Working on $host $dir\n";
open("$host","$cmd >>$log_dir/$host.log|"); # fork/sh/cmd magic is
in the '|'
}
# wait for processes to finish -- blocks on the slow host -- zombies
the others for a while
foreach $host (@hosts) {
while(<$host>) {
$data{$host}.=$_; # try to save the data -- sure wish I could log
to a fixed file instead.
}
close($host);
}
}
Brad Davis wrote:
>
> just add the > /place/where/thelogfiles/arestored .
> Just direct the output to a file like that. Nice quick and dirty!
>
> Thanks,
> Brad Davis
> Cyberport Station
>
> Eric Whiting wrote:
>
> > I understand the log-format option for the rsync command:
> >
> > --log-format=FORMAT log file transfers using specified format
> >
> > I understand the log option for the rsyncd deamon.
> >
> > log file
> >
> > What I want to do is log from the rsync command (not deamon) to a
> > file. So far all I can get is my log format string written to stdout.
> > How to I tell the rsync command to log to a file?
> >
> > I'd like this command to make a logifle in /tmp but it only writes the
> > info to stdout.
> > Is there a flag I'm missing? BTW I can't get all the % strings to work
> > quite right in the command rsync but I get most of the important ones.
> >
> > Thanks,
> > eric
> >
> > SAMPLE COMMAND:
> >
> > rsync -a --log /tmp/logfile --log-format "%o %f %l %b" /bin /tmp
> >
> > --
> > __________________________________________________________________
> > Eric T. Whiting AMI Semiconductors
> > (208) 234-6717 2300 Buckskin Road
> > (208) 234-6659 (fax) Pocatello,ID 83201
> > [EMAIL PROTECTED]
