Hello everyone,

I am writing a small backup script that uses Net::SSH::Perl. But I started running into issues where the users disk space is larger that the amount of memory I have on the backupserver.

#!/usr/bin/perl

use strict;
use diagnostics;
$|++;
use lib ".";
use ServerBackup;
use Net::SSH::Perl;
use FileHandle;
use File::Path;
use Net::SSH::Perl::Buffer;
use Compress::Zlib;

my $user = "root";
my $hostname = "somedomain.com";
my $ssh = Net::SSH::Perl->new($hostname,
          identity_files =>["$id_key_fn"],
          port => 22,
          debug => 1);
   $ssh->login($user);
my ($home_list, $home_err, $home_exit)=$ssh->cmd($listhome); # cmd jus
+t grabs users from home dir
my @home_users = split " ", $home_list;
foreach my $home_user (@home_users) {
   mkpath(['/export/home/backup/$hostname/$home_users'],0,0666);
my $buffer = Net::SSH::Perl::Buffer->new;
my ($home_out, $home_err, $home_exit);
while (($home_out, $home_err, $home_exit) = $ssh->cmd("cd /; /usr/bin/
+nice /bin/tar cpf - /home/$home_user")) {
   $buffer->put_int32(10932930);
   my $int = $buffer->get_int32;
   my $gz = gzopen("/export/home/backup/$hostname/$home_user\.tar.gz",
+ "w");
   my $tgz_user = $gz->gzwrite($int);
   my $home_gz_err = $gz->gzerror();
       $gz->gzclose();
   }
}
[download]

I just want to set a buffer to a certain size then write so that I do not bring the backup server down because I used up all the available memory tarring any extremely large users to STDOUT.

No matter what I try I keep getting the same error: Can't call method "gzwrite" on an undefined value.

Any have any suggestion?

Thanks for the help.