[Ganglia-general] newbie question

2003-12-12 Thread mike . odonnell
I am just starting to work with ganglia and have one question. I am working to setup a cluster where systems reside on two subnets. I changed the 'mcast_ttl' value from 1 to 16. However the cluster members on subnet A do not see the cluster members on subnet B. Is there something I am

Re: [Ganglia-general] newbie question

2003-12-12 Thread Matt Massie
mike- i think you are right. the router configuration is the place to look. setting the ttl in the header of a multicast packet works more like a suggestion for the router. if the router it configured to forward mulitcast traffic, it will decrement the ttl and pass on the message otherwise it

[Ganglia-general] ganglia and down nodes

2003-12-12 Thread Bernard Li
How does ganglia determine whether a node is down or not? It seems that if a node went down the ganglia webpage would simply stop reporting information about it (as if it doesn't exist, instead of marking it as down). Thanks, Bernard