Path: utzoo!attcan!uunet!mcvax!inria!piquer From: piquer@inria.UUCP (Miguel Piquer) Newsgroups: comp.dcom.modems Subject: Re: more real data for Trailblazers and Argentina Summary: Trailblazers in transatlantic links Keywords: Trailblazers performance transatlantic Message-ID: <710@inria.UUCP> Date: 10 Jun 88 11:58:10 GMT References: <14605@uunet.UU.NET> <10127@mcdchg.UUCP> Organization: INRIA, Rocquencourt, France. Lines: 34 In article <10127@mcdchg.UUCP> heiby@mcdchg.UUCP (Ron Heiby) writes: >Rick Adams (rick@uunet.UU.NET) writes: >> 5/30 17:23 48294 bytes 43.90 secs 8799 bps >> 5/30 17:24 30301 bytes 26.71 secs 9075 bps >> [...] >> 5/30 17:34 50714 bytes 40.66 secs 9978 bps >> 5/30 17:35 29146 bytes 19.93 secs 11699 bps > [...] >at the wall clock time. I am assuming that this set of 11 transfers took >place on a single call. I have added the total bytes and get 376,334 in >12 minutes. This works out to be 522.7 cps, or slightly better than half >what it appears to be at first. > [...] >Anyone have any thoughts on the matter? >It looks to me like with a reliable link, >that bigger files are even more of a win with Telebit speeds than with >1200 bps modems. I agree, I have seen the experiences in Chile (with a much lesser throughput) and the Trailblazer does a better job than the computer, which looses all his time scanning directories and searching for jobs, which normally are many short mail files (with its short commands files). I don't have the data at hand but I do know that the people there are planning a batch system that collects all the mails in a big file doing only one big transfer each time, hoping to get a much better performance. I think that Argentina has the same problem: a super modem, a super PTT (much better than the chilean one...) with a normal computer. Perhaps they can use the same solution (or buy a bigger machine :-)), but we are falling in a new problem: the communications are running faster than the computers :-). >Ron Heiby, heiby@mcdchg.UUCP Moderator: comp.newprod & comp.unix Jo Piquer, piquer@inria.inria.fr "A chilean lost in France"