On Fri, May 04, 2012 at 04:47:22PM -0700, Steven A. DuChene wrote: > OK, but what is a reasonable value to set this to?
there is none, hence why there is no default. "ideally" you shouldn't need it just like it wasn't needed before 3.1, but in order to support metadata information the protocol had to be changed and there was no other solution than to put this as a workaround when the unicast configuration was reported broken by it. once a better solution is found (which will likely break the gmond protocol again) it shouldn't be needed, but meanwhile telling gmond to periodically resend the metadata information for metrics is the only way to deal with a collector that went down, and starts receiving (and ignoring) metric data without a matching metadata information to use. > 30 seconds? 2minutes? 10minutes? it depends on how much bandwith/contexts are you willing to sacrifice for getting the data you need in case of a collector failure and therefore on which kind of setup are you running ganglia. in HPC (where ganglia) started this might be a showstopper and prevent some people to upgrade past 3.0, but in an "IT" like environments I'd seen people use "60" and hope the extra work gets lost on the noise. I'll recommend you do your own measure and decide based on : * number on nodes you have * number of metrics per node * how much metadata on each metric * how much CPU/bandwith can you spare on each node for gmond * how many collectors you have and how many gmond they are all serving (peak) * how much CPU/badwitch each collector can use * how sensitive are you to having data holes and restart gmond instead Carlo ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Ganglia-general mailing list Ganglia-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ganglia-general
