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Article #13532Re: what is the quickest (most efficient?) File xfer protocol?
From: Luc Laliberte
Date: Thu, 29 Nov 1990 17:36
Date: Thu, 29 Nov 1990 17:36
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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. Otherwise ZMODEM is exceptionally fast, unless you are using MNP5 as well. (The two blocking processes can interfere with each other) in which case there's a YMODEM varient for that reason. SEALINK and TELELINK also work well if Y or ZMODEM are unavailable.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!cunews!bnrgate!bigsur!bnr-rsc!bcarh188!lalibert From: lalibert@bcarh188.bnr.ca (Luc Laliberte) Newsgroups: comp.sys.ibm.pc Subject: Re: what is the quickest (most efficient?) File xfer protocol? Summary: Don't use ZMODEM on noisy lines Message-ID: <3765@bnr-rsc.UUCP> Date: 29 Nov 90 17:36:31 GMT References: <33558@netnews.upenn.edu> <aRHDT2w163w@cybrspc> Sender: news@bnr-rsc.UUCP Reply-To: lalibert@bcarh188.UUCP () Organization: BNR Ottawa, Canada Lines: 13