jimf@pro-gateway.cts.com (Jim Ford, Co-SysOp) (11/29/90)
In-Reply-To: message from tony@scotty.dccs.upenn.edu ------------------------------------------------------------------------------ CS-ID: #347.ibm/csip.net@pro-gateway, 1223 chars Date: 27 Nov 90 22:24:25 GMT From: tony@scotty.dccs.upenn.edu (Anthony Olejnik) Subject: what is the quickest (most efficient?) File xfer protocol? I've been downloading some files from BBS lately using a 1200 baud modem. I've been using Xmodem (CRC) mainly. I'd like to know what file transfer protocol is best for transferring a single file (as opposed to multiple files). Since I'm using Procomm, I'm limited to the following: XMODEM KERMIT TELINK MODEM7 YMODEM YMODEM batch ASCII COMPUSERV B WXMODEM Also, some BBS support some file transfer protocols that are not contained (by default) in Procomm (v2.4.2). I understand that its possible to add additional protocols to Procomm somehow (though I never really followed thru on this). So, what is the fasted (ie. uses up less connect time - assuming a clean line)? Any help would be *GREATLY* appreciated. thanks. --tony ------------------------------------------------------------------------------ I'm not sure whether this will work anywhere or with anyone, but Compuserve B is a very fast and efficient protocol. You may, however, have to be connected to CIS to use it. =============================================================================== ProLine: jimf@pro-gateway Internet: jimf@pro-gateway.cts.com UUCP: crash!pro-gateway!jimf ARPA: crash!pro-gateway!jimf@nosc.mil BITNET: jimf%pro-gateway.cts.com@nosc.mil ====================Pro-Gateway 214/644-5113 3/12/2400 baud====================
ftw33616@uxa.cso.uiuc.edu (Frank T. Wang) (11/30/90)
That's odd.... I've had zmodem go all the way down to 1 byte, & then had it creep back up to the great 1K blocks....... I've heard that Xmodem G is even faster then Zmodem! is this true?
kdq@demott.COM (Kevin D. Quitt) (12/01/90)
In article <1990Nov30.023420.6538@ux1.cso.uiuc.edu> ftw33616@uxa.cso.uiuc.edu (Frank T. Wang) writes: > >That's odd.... I've had zmodem go all the way >down to 1 byte, & then had it creep back up to the great 1K blocks....... > >I've heard that Xmodem G is even faster then Zmodem! is this true? Maybe it depends on whose ZMODEM you're using. We use OMEN Technologies, the latest version. On a 38400bps line, kermit transfers average 2420 bytes per second, ZMODEM averages 3664. How does XMODEM G stack up? -- _ Kevin D. Quitt demott!kdq kdq@demott.com DeMott Electronics Co. 14707 Keswick St. Van Nuys, CA 91405-1266 VOICE (818) 988-4975 FAX (818) 997-1190 MODEM (818) 997-4496 PEP last 96.37% of all statistics are made up.
brian@cunixf.cc.columbia.edu (Brian Hoffman) (12/01/90)
In article <3765@bnr-rsc.UUCP> lalibert@bcarh188.UUCP () writes: >My brother once set up a download using ZMODEM. He came back an hour >later expecting to be logged out. (Autologout when download completed.) >But the modem was still chugging along with a block size of 1 byte! >He quickly brok out and used XMODEM. Turns out if ZMODEM feels too many >errors are occuring it decreases the block size to reduce retransmission >time. But if the trouble clears up, it doesn't increase the size. >What likely happened is the phone got picked up, giving mega noise, and >dropping the block size. Wrongo. Zmodem will automatically increase the block size if the errors go away. Most likely, your brother was using a crummy unix implementation. |Brian Hoffman | |brian@cunixf.cc.columbia.edu | |Quote: "A red sky at night may be a shepard's delight, but you're |