rsync - Jun 2004 - DU and Hard Links?

Hi,

I'm doing a 30 day rotational backup using rysnc.

If I go to the root of the backup directory and use: du --max-depth=1
-h, it gives me the actual space being taken up by each incremental
directory, the space being taken by the current directory, and then the
total of all.

For example:

44G	/Current
1G	/06-20-2004
750M 	/06-19-2004
Etc...
Etc..
..
..
70G	Total

But what I would like to do is automatically get the size of the last
created hard linked directory daily through a script. But in the example
above, if I move into one of the sub directories, like /06-20-2004, and
run: du -sh, it gives me a total of 44G. This is the size of the actual
files including the hard links. I'm looking for the 1G or so figure
without having to run du from the root, which understandably takes a
long time.

Thanks,
Max

On Sat, Jun 19, 2004 at 01:55:02PM -0500, Max Kipness
wrote:
> But what I would like to do is automatically get the size of the last
> created hard linked directory daily through a script.
Try the attached perl script.  It counts the blocks in the arguments you
specify (like du does), but it leaves out any files that have more links
than the number of instances we find in our scan (i.e. if we find
"foo"
with a link count of 2 and we run across it again in our scan, we count
its blocks; if it had a link count of 3 or more and we only ran across
it twice, we'd skip it).

..wayne..
-------------- next part --------------
#!/usr/bin/perl -w

use strict;

my %hash; # Keep track of multi-linked inodes
my $total_blocks = 0;

my @todo = @ARGV;
push(@todo, '.') unless @todo;

foreach my $fn (@todo) {
    my($inode,$nlinks,$blocks) = (lstat($fn))[1,3,12];
    if (-d _) {
	opendir(DP, $fn) or die $!;
	push(@todo, map("$fn/$_", grep(!/^\.\.?$/, readdir(DP))));
	closedir DP;
    } elsif ($nlinks > 1) {
	if (!defined($hash{$inode})) {
	    $hash{$inode} = $nlinks - 1;
	    next;
	}
	next if --$hash{$inode};
    }
    $total_blocks += $blocks;
}

print "$total_blocks blocks\n";
print int($total_blocks / 2 + .5), "K\n"; # Assumes 512-byte blocks

> -----Original Message-----
> From: Wayne Davison [mailto:wayned@samba.org] 
> Sent: Saturday, June 19, 2004 3:22 PM
> To: Max Kipness
> Cc: rsync@lists.samba.org
> Subject: Re: DU and Hard Links?
> 
> On Sat, Jun 19, 2004 at 01:55:02PM -0500, Max Kipness wrote:
> > But what I would like to do is automatically get the size 
> of the last 
> > created hard linked directory daily through a script.
> 
> Try the attached perl script.  It counts the blocks in the 
> arguments you specify (like du does), but it leaves out any 
> files that have more links than the number of instances we 
> find in our scan (i.e. if we find "foo"
> with a link count of 2 and we run across it again in our 
> scan, we count its blocks; if it had a link count of 3 or 
> more and we only ran across it twice, we'd skip it).
> 
> ..wayne..
> 
Wayne, that did the trick. Thanks.

Max