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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi everyone. Some time ago, I asked about this:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>2006-08-02 12:24:50 RRD error updating
/home/hobbit/data/rrd/taylor.brc.mcw.edu/disk,root.rrd from 141.106.224.178:
illegal attempt to update using time 1154539490 when last update time is
1154539490 (minimum one second step)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Nobody had anything useful for me, because there could be
tons of causes…. However, just now, I finally figured it out.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Seems that the previous sysadmin decided to create a home
directory for “root” to store all his files (tarballs,
etc). It was mounted as simply, ”/root”.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This is all perfectly valid, *<b><span style='font-weight:
bold'>UNTIL</span></b>* we get to rrd and disk usage.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Within the realm of hobbit and rrd, the actual root file
system (“/”) is stored in rrd as
/home/hobbit/data/rrd/taylor.brc.mcw.edu/disk,<b><span style='font-weight:bold'>root</span></b>.rrd
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>When the client system had both “/” and “/root”,
this had the nifty side effect of causing hobbit’d RRD environment to
become confused-- that’s why I had an extra graph that had a
placeholder, but nothing was being generated! That’s because
I had 17 mounted filesystems, which (divided by 4) is 5 graphs. But
the 5<sup>th</sup> graph never showed up, and I looked carefully and figured
out it was “/root” that wasn’t being
graphed. That’s when the lightbulb went off. Two
file systems “/” and “/root” were being called the same
thing in terms of rrd: “root”. Oooops.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>SO……….
While I decided to simply move the “/root” crud to somethere that
made more sense… I have apparently tripped upon
something that hobbit+rrd isn’t prepared to deal with, which is a file
system called “/root”. While I think this would
be rare, it’s possible. Not sure how it would be
handled? Maybe call the “/” file system “root~”
or include some other special character in the
name? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>---------------------------------------------------------</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Kent C. Brodie - <a href="mailto:brodie@phys.mcw.edu">brodie@phys.mcw.edu</a></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Department of Physiology</span></font><o:p></o:p></p>
<p class=MsoNormal><st1:PlaceName w:st="on"><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Medical</span></font></st1:PlaceName><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <st1:PlaceType
w:st="on">College</st1:PlaceType> of <st1:State w:st="on"><st1:place w:st="on">Wisconsin</st1:place></st1:State></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>(414) 456-8590</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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