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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Jumbo frames
<[email protected]> writes: > [...] > if there are several factors that will contribute to solving the > problem, I think that you get better results if you attack all of them > in parallel. Well, I guess; except that "only buy IP network access from a service provider who supports jumbo MTUs end-to-end through their network" may be a much bigger task than tuning your TCP stack. Jumbo frames seem to help a lot when trying to max out a 10 GbE link, which is what the Internet land speed record guys have been doing. At 45 Mb/s, I'd be very surprised if it bought you more than 2-4% in additional throughput. It's worth a shot, I suppose, if the network infrastructure supports it. On a coast-to-coast DS-3, a TCP stack that's correctly tuned for a high bandwidth-delay product environment, on the other hand, is likely to outperform an untuned stack by a factor of 10 or so in bulk transport over a single TCP session. (Though, as somebody pointed out, tuning may have to occur all the way up the application stack; there are, e.g., ssh patches out there for high-BDP environments.) So I guess, sure, try anything you can; but I know what I'd try first :-). Jim Shankland
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