Have you looked at packet loss and retransmission rates? When frames are larger, a lost bit requires retransmission of more data. It may be that this happens under heavy load, such as when you're doing a large transfer, but has less impact when testing individual file transfers.
David On 1/29/2010 3:52 AM, stephen mulcahy wrote: > Allen Wittenauer wrote: >> We're working on a patch that monkeys with the TCP buffers because we're >> seeing slow downs with big transfers as well. It might be related... > > Kewl. Happy to test it out if our cluster hasn't moved into production > at thate stage. Just drop me a mail. > > -stephen >
