On Wed, 2005-10-12 at 23:01 -0700, Rod Walker wrote: > And after doing this, do I still need to specify -tcp-bs in the > globus-url-copy command line? If so, I don`t know how to do this for > lcg-cp. No (and yes), good performance depends on both sides having good values. Having a large tcp send window doesn't help if the receiver enforces a small one... but since it worked with -tcp-bs it should work without it after changing the kernel-tuning. But DO read that link AND the kernel-source doco first.