Dominik Rau wrote:

I've got some really annoying sync problems (no, not the changelist this time ; )) here with my cluster (animation hangs shortly sometimes in unpredictable intervals) and I'm quite sure that they are related to a badly configured network, especially wrong routing (I think). Please, could anybody give me some hints about multicast under linux (debian sid with 2.6 kernel in my case, but that shouldn't make that much difference)?

Maybe I should explain why I think that it's routing related:

My client starts all servers via ssh remotely, also the one on localhost (I'm rendering on the client, too). If I run the client and one server on the localhost only and put my default route on the local loopback device, it works like a charm. If I route the default to eth0 like above, all smoothness is gone. Even more funny: If I have less objects in my scene, it's getting worse (faster frame rate but more bad syncing I think). It also makes no difference if I run the client on a dedicated cluster node without rendering on it. Can't see why my dedicated and switched 1000MBit network should be a bottle-neck here (nload shows me about 8MByte traffic per second).

So, it looks like bad routing to me. Any other opinions?

Regards,
Dominik




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