Thanks for the ideas. I ended up looking through the log file. It turns out that the machine I have the metadaemon had a time of 5 minutes faster. I suppose most people would have a network in sync. Anyway, because my metadaemon was ahead, it would create a rrd for a metric, then try to update it. The update was illegal because the update time was before the creation time. After the illegal update, it stopped looking through the XML data. Therefore, it was creating one metric each time through.
After changing the time on the metadaemon to match the rest of the times, all of the metric graphs appeared. Thanks again for the help. Marcia Prescott --- matt massie <[EMAIL PROTECTED]> wrote: > marcia- > > here is another theory to throw out. if you ran > gmetad in the default > configuration, it will create round-robin databases > that expect to be > updated every 15 seconds. if after these databases > where created, you > changed the interval to be larger then you have a > problem (unless you > flush all the rrd databases a.k.a. rm -r > /var/lib/ganglia/rrds). rrd > requires a heartbeat interval which in gmetad is > > heartbeat = 8*step; > > that means that if the database is not updated in > 8*15 secs (120 secs) > then it will save a "NaN" record. if greater the > half of the records > rrdtool averages over a "NaN" then a "NaN" is saved > to the RRA > (round-robin archive). > > unfortunately, changing the step in a rrdtool is not > handled dynamically > in gmetad. you might look at rrdtune commandline > tool to tweak the > databases if it's critical you keep the info. > > -matt > > Today, steven wagner wrote forth saying... > > > From: steven wagner <[EMAIL PROTECTED]> > > To: Marcia Prescott <[EMAIL PROTECTED]> > > Cc: [email protected] > > Date: Fri, 01 Aug 2003 15:28:22 -0700 > > Subject: Re: [Ganglia-general] Gmetad slowly > collecting data > > > > I have no answers, only vaguely-informed > statements and half-formed > > questions (welcome to free software's version of > tech support!). > > > > It is interesting to note that 4 hours = 16 real > data points (at > > 15-minute polling intervals). That's a > suspiciously round number... > > > > However, if this was just a matter of the graphs > not displaying because > > there weren't enough interpolated data points to > render a nice graph, I > > would have expected them all to pop up at the same > time... > > > > At this point, I would want to compare gmetad's > raw XML output to the > > output of the monitoring core it's polling. The > polled monitoring core > > should have a full metric payload. If it doesn't, > then you've got some > > kind of multicast problem involving that node. > Compare its output to > > the rest of the cluster, that may help. > Otherwise, crank up the debug > > level and your favorite packet sniffer... > > > > Assuming the monitoring core's OK, then the > metadaemon's being funny. > > What happens if you restart the metadaemon? What > happens if you change > > the polling interval? > > > > I shudder to recommend running gmetad with debug > on for several hours > > ... heck, I left it on for ten minutes once and it > made me cry, but that > > was on a few hundred nodes. :) Unfortunately, > that may be the only > > thing that can offer you clues as to why it's > taking so long for new > > nodes to pop up. > > > > gmetad should be walking straight through the > <HOST> tags in the XML > > parser. Maybe there's something keeping it from > finishing... assuming > > the new hosts are at the bottom? > > > > Just a few ideas for you. Good luck! > > > > Marcia Prescott wrote: > > > I've been using ganglia for a couple of months. > In > > > this time it has been great. I set it up so > that I > > > would gather the information at longer intervals > of 15 > > > minutes between polls. This has been working > great! > > > > > > A couple of days ago, I started gmond on 30 > nodes of a > > > cluster. I was already monitoring 3 of those > nodes. > > > The data has been slow to join the summary > > > information. > > > Could this be because I changed the polling > intervals? > > > > > > > > > I would think that the nodes that I added would > all > > > show up at the same time. Instead, a new node > joins > > > the summary information about every 4 hours. > Why is > > > this? It is about every four hours that graphs > appear > > > for the nodes, as well. > > > > > > I can see the graphical representation for all > of the > > > nodes, but they lead to a page with no collected > data > > > for the node. > > > > > > The XML data is sending the information for all > of the > > > nodes, but the Gmetad doesn't seem to be > collecting > > > the information as expected. Why does it take so > long > > > to collect the data? > > > > > > Thanks, > > > > > > Marcia Prescott > > > > > > __________________________________ > > > Do you Yahoo!? > > > Yahoo! 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