Hi Arne:

On Thu, Nov 18, 2010 at 3:02 AM, Arne Brutschy <[email protected]> wrote:

> I am using Ganglia for a cluster of ~70 nodes - single monitor, single,
> flat network. What's the recommended type of operation for this, unicast
> or multicast? What are the (dis)advantages of each mode?

I would start simple and use the default settings (multicast), it is
fairly easy to set up.

Network administrators have mentioned that multicast is "chatty" and
causes jitter.  If the workload on your cluster is sensitive to that,
you might consider switching to unicast.  I am sure Google and the
mail archives is a great source of knowledge regarding these.

I just added this to the FAQs -- hope this helps.  Comments/thoughts
on the subject welcome!

https://sourceforge.net/apps/trac/ganglia/wiki/FAQ

Thanks,

Bernard

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