> 350ms is the minimum retransmit delay. Is it possible that your network is > dropping packets? > >It's possible, and I'll check. But a 10MB file takes 2 seconds to transfer >using ssh over tcp, and over 4 minutes using afs over rx over udp. Is rx >really that much worse than tcp?
I saw a paper that Sine Nomine did for a customer on AFS client performance (the work is in the public domain, but it's actually rather hard to find a copy of this paper). One thing they discovered is that when network performance went above 100 megabits, Rx throughput fell off erratically (on Gig-E, they observed an average throughput of 15 Mb/s). So yes ... rx really is that much worse than TCP. I suspect that this is a long-standing bug that has only manifested itself recently with the advent of faster disks and network. --Ken _______________________________________________ OpenAFS-devel mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-devel
