Hi all, Had to look the spead protocol up, found some viewgraphs.
IMHO, there were two warning signs: TCP header and small number of header bytes. A rate-based protocol like UDT might be more appropriate. And I have seen so many times what happens when people try to save a few bytes out of 1500 or 9000 byte packets. It is not a nice sight.
For your information, the hot topic nowadays is continent-wide distributed filesystems. There are about five groups of universities competing each year, U of Chicago has won three of the last challenges, U of Indiana the fourth. I think the limit nowadays has been about 120 Gbps. That is not a typo.
We have also Jan Wagner's udtfs, a userspace udt-based filesystem. Might be possible too put it on silicon. The Roach board is quite nice for all of these things, offload the complicated things to the powerpc and use the Xilinx for raw transport.
Best regards, Jouko "Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works. If it works big, others quickly copy it. Then you do something else. The trick is to do something else." On Mon, 29 Nov 2010, John Ford wrote:
Hi all. Do any of you have any xilinx designs that implement SPEAD protocol packets over 10 GbE? John
