Frederico & Steven, I really apprceciate your thoughts about the Ganglia front-end architecture.
I have one more question. Is gmetad robust? If I've got this right, gmond maintains only the lastest metric values received for the cluster. If all of the gmetads go down, aren't all the values during that time period lost forever? If at least one gmetad stays up, then when others come up and pull the xml description from the gmetad that survived, will they merge all of the values missing from their own rrd? If so, how do you know at any given time whether a particular gmetad is up to date? What advice would you give in terms of the gmetad to gmond ratio? For maximum redunancy, should every node run both gmond and gmetad? Jonathan
