Date: Mon, 13 Aug 2007 11:34:26 -0700 From: "Kevin Oberman" <oberman@es.net> To: freebsd-net@freebsd.org Subject: Very high wide area TCP tuning Message-ID: <20070813183426.C196D45045@ptavv.es.net>
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--==_Exmh_1187030066_15083P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline I am attempting to use a FreeBSD box with either a Myricom or Chelsio 10GE card to generate very large TCP streams over cross-country links. The RTT for the test path is 94 ms. It is dedicated to my testing at this time, so I have no contention other than a few KB of routing updates. Clearly, I need a very large window...about 120 MB, but I am unsure how FreeBSD will handle this. (Unless I do other things, I suspect it will not be pretty.) I imagine I will need a large kvm space, at the least, but are there any other sysctls that are likely to need adjusting to make this all work? IS it likely to work better on a amd64 system than a i386? Any suggestions would be appreciated. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1187030066_15083P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFGwKQykn3rs5h7N1ERAn3xAKC0blxPnlY6mcgsrz10XqInlYl4ZwCgsKjh yJABikt5WHeSARkGBsnxUxI= =2kzw -----END PGP SIGNATURE----- --==_Exmh_1187030066_15083P--
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