On Jan 12, 2011, at 4:22 PM, Bernard Li wrote: > Hi Seth: > > On Wed, Jan 12, 2011 at 1:31 PM, Seth Graham <[email protected]> wrote: > >> Migrating to unicast eliminated the firewall issues, means only a select few >> machines have to keep metrics in memory, and no more cross talk with other >> groups. I never saw any solid evidence that ganglia was putting an unfair >> load on systems, but it was easier to reconfigure than fight it. > > Since you guys are in HPC and are using unicast -- what > send_metadata_interval do you use?
It's currently set to 15 seconds. However, only a third of our machines are migrated to 3.1.7.. everything else is still on 2.5. I "chose" 15 seconds because that was the number that popped up when I was searching for information on send_metadata_interval, and I haven't touched it since. MRTG data for my collector nodes don't show anything to be alarmed about, whatever bandwidth ganglia is using, it's getting buried by user consumption. I think it will stay this way, as 1000 machines is our largest cluster and that's how many are currently using 3.1.7. I do plan on sending all 3000 of our machines to a single gmetad, so it'll be interesting to see how that holds up (but my understanding is that send_metadata_interval has no effect on gmetad). > Would appreciate your input on the following thread over at > ganglia-developers: > > http://www.mail-archive.com/[email protected]/msg05725.html I don't have much in the way of comments, because I haven't had any problems. I do like the idea to set the default to something other than zero if unicast is enabled. A warning on startup could be useful too.. I know I glazed over the send_metadata_interval in the man page several times until a google search pointed it out to me. Printing the message only when -d is specified might be good enough.. -d 1 is usually the first thing I try when things aren't doing what I want. ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Ganglia-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ganglia-general
