Ubuntu Lenny: rrd does not update the ctime and mtime of rrd-files

Hi All,


I have a very strange problem.

We are migrating our mrtg / rrd / weathtermap scripts from a server 
running debian Etch to debian Lenny.

Now, we have a very strange fenomina:
mrtg does update the rrd-files as normal, but does not update the ctime 
and mtime of the files.


$ rrdtool dump test1.rrd | grep lastupdate
	<lastupdate>1285588262</lastupdate> <!-- 2010-09-27 13:51:02 CEST -->

Last update is 27 sept. 13:51:02 (6 minutes ago)


$ ls -l test1.rrd
-rw-r--r-- 1 mrtg nogroup 105160 2010-09-22 17:27 test1.rrd

Timestamp of file is 22 sept. 17:27 (when the file was created)



$ stat test1.rrd
   File: `test1.rrd'
   Size: 105160    	Blocks: 208        IO Block: 4096   regular file
Device: fe05h/65029d	Inode: 15882       Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1010/    mrtg)   Gid: (65534/ nogroup)
Access: 2010-09-27 13:55:28.079400385 +0200
Modify: 2010-09-22 17:27:18.499395801 +0200
Change: 2010-09-22 17:27:18.499395801 +0200

access-time is adapted, but not ctime and mtime.



I don't know if this is a problem related to rrd or debian; but I'm 
quite puzzled here!
However, doing some tests with other applications (like vi) DO change 
the ctime and mtime of the file.

I don't know if this is important, but the box is running on a 
xfs-filesystem.


I have the problem with the original version of rrd running on the box 
(1.3.1-4) and the version available in the "backports" distribtution: 
1.4.3-1~bpo50+1


Anybody any idea?
Is this a known issue?


The problem (for us) is that this destroyes our "cleanup" scripts as 
they all use the ctime/mtime to delete mrtg-files not used for more then 
a month. :-(



Cheerio! Kr. Bonne.