On Fri, Sep 01, 2006 at 07:01:25AM -0600, Ralph Castain wrote: > > Do you agree to go on with two oob components, tcp and tcp6? > Yes, I think that's the right approach
It's a deal. ;) > I think this can be supported nicely in the framework system. All we > have to do is set the IPv6 component's priority higher than IPv4. Do you mean that priority?: MCA oob: parameter "oob_tcp6_priority" (current value: "0") > We then can deal with the "try IPv6 first" by traversing the component > list in priority order. As an example, see the RAS framework. Where is it done? It's outside the mca/oob directory, right? My knowledge about orte is currently more or less limited to this subdirectory ;) > it. In this case, we need both OOB components active, and we need a routing > table that tells us which one to use to talk to various processes. I suspect > the routing table belongs in the RML framework. If you look at the PLS > framework, you'll see where we "front" the select function to give you the > ability to specify a preferred selection. We might have to do the same thing > with the OOB to allow the RML to say "send this buffer using this specific > OOB component", while still allowing it to say "send this buffer using the > *best* component". Sounds good (but I don't have to do it on my own, do I?). Right now it looks like this: orterun -np 2 -host hostA,hostB some_command uses IPv4 and it is still working. orterun -mca oob ^tcp hostA,hostB some_command hangs. The HNP correctly generated the tcp6://-URIs, but I guess the remote node tries to connect with its oob/tcp module (which cannot handle IPv6 anymore). So I chmod 0 the mca_oob_tcp.so to prevent its loading, thus resulting in a working IPv6 connection. (for now, I don't know why this happens (the hang), but at least the oob/tcp6 component is working at all) > I suspect that backend processes (i.e., non-HNP processes) really will > only use one or the other. The question also arises for the btl/tcp component: if all nodes should be able to communicate with each other, they must use the same address family. Thanks for your help. -- mail: a...@thur.de http://adi.thur.de PGP: v2-key via keyserver Person1: Geil. Morgen um 9 muss ich Präsentation halten. ÖRKS! Person2: Morgen um 9 werde ich eine Kaffeetasse halten.
