Dear All We Deal with TCP window size all day every day across the southern cross from LA to Australia which adds around 160ms... I've given up looking for a solution to get around physical physics of sending TCP traffic a long distance at a high speed....
UDP traffic however comes in very fast.... Kindest Regards James Braunegg W: 1300 769 972 | M: 0488 997 207 | D: (03) 9751 7616 E: james.braun...@micron21.com | ABN: 12 109 977 666 This message is intended for the addressee named above. It may contain privileged or confidential information. If you are not the intended recipient of this message you must not use, copy, distribute or disclose it to anyone other than the addressee. If you have received this message in error please return the message to the sender by replying to it and then delete the message from your computer. -----Original Message----- From: Phil Fagan [mailto:philfa...@gmail.com] Sent: Wednesday, June 19, 2013 12:16 AM To: Jakob Heitz Cc: <nanog@nanog.org> Subject: Re: 10gig coast to coast Sorry; yes Sawtooth is the more accurate term. I see this on a daily occurance with large data-set transfers; generally if the data-set is large multiples of the initial window. I've never tested medium latency( <100ms) with small enough payloads where it may pay-off threading out many thousands of sessions. However, medium latency with large files (50M-10G) threads well in the sub 200 range and does a pretty good job at filling several Gig links. None of this is scientific; just my observations from the wild.....infulenced by end to end tunings per environment. On Tue, Jun 18, 2013 at 7:45 AM, Jakob Heitz <jakob.he...@ericsson.com>wrote: > Thanks Fred. Sawtooth is more familiar. > How much of that do you actually see in practice? > > Cheers, > Jakob. > > > On Jun 18, 2013, at 6:27 AM, "Fred Reimer" <frei...@freimer.org> wrote: > > > It is also called a "sawtooth" or similar terms. Just google "tcp > > sawtooth" and you will see many references, and images that depict > > the traffic pattern. > > > > HTH, > > > > Fred Reimer | Secure Network Solutions Architect Presidio | > > www.presidio.com <http://www.presidio.com/> > > 3250 W. Commercial Blvd Suite 360, Oakland Park, FL 33309 > > D: 954.703.1490 | C: 954.298.1697 | F: 407.284.6681 | > frei...@presidio.com > > CCIE 23812, CISSP 107125, HP MASE, TPCSE 2265 > > > > > > > > > > On 6/18/13 9:20 AM, "Jakob Heitz" <jakob.he...@ericsson.com> wrote: > > > >>> Date: Mon, 17 Jun 2013 22:04:52 -0600 > >>> From: Phil Fagan <philfa...@gmail.com> ... you could always thread > >>> the crap out of whatever it is your transactioning across the link > >>> to make up for TCP's jackknifes... > >> > >> What is a TCP jackknife? > >> > >> Cheers. > >> Jakob. > >> > > > > -- Phil Fagan Denver, CO 970-480-7618
