2008/5/16 Roland Dreier <[EMAIL PROTECTED]>: > > hmm..... and is there no workaround for this, for this situation? I > > mean, if the server dies isn't there any possibility that > > the sender/client realizes this. If the timeout it's too large this > > can be cumbersome. > > > > I tried reducing the timeout and indeed the client realizes faster > > when the server exits but another problem arises: Without exiting the > > server, > > on the client side I get the error (retry exceed) when polling for a > > recently posted send - this after some hours. > > There's a tradeoff between detecting real failures faster, and reducing > false errors detected because a response came too slowly. > > Clearly if a response may take an amount of time 'X' to be received > under normal conditions, there's no way to conclude that the remote side > has failed without waiting at least 'X'. >
I understand. So there's no really difference between the two situations, real server failure or just a load problem that takes more time? Something like a different error or a SIGPIPE :) ? I will describe my situation, maybe it helps (bare with me as I'm starting with Infiniband and so on) I have a client and a server.The clients posts RDMA calls one at a time (post, poll, post...). So server is just there. If I try to start something like 16 clients on 1 machine, after a few hours I will get an error on some client programs (retry excess) with a timeout of 14. If I increase the timeout for 32, I don't see that error but if I stop the server, the clients take a lot of time to acknowledge that, which is also not wanted. That's why I asked if there a 'good value'. If I have such a load between 2 nodes, I always have to risk that if the server dies the client will take much time to see it. That's not nice! Thanks for the help and quick answers, Rui _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
