home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.archives.msdos.d:116 comp.binaries.ibm.pc.archives:5215
- Newsgroups: comp.archives.msdos.d,comp.binaries.ibm.pc.archives
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!ux1.cso.uiuc.edu!news.cs.indiana.edu!att!mcdchg!chinet!les
- From: les@chinet.chi.il.us (Leslie Mikesell)
- Subject: Re: *** WHAT'S THE BEST COMM PROTOCOL ***
- Message-ID: <BzoKxs.IFJ@chinet.chi.il.us>
- Organization: Chinet - Public Access UNIX
- References: <1992Dec21.181829.4391@porthos.cc.bellcore.com> <olevnmr.725048641@sunfun>
- Date: Tue, 22 Dec 1992 21:56:15 GMT
- Lines: 30
-
- In article <olevnmr.725048641@sunfun> olevnmr@chem.ualberta.ca (olevnmr) writes:
-
- >Just one thing to say here..
- >DON'T USE KERMIT!!!!!!
-
- You should probably qualify that a bit.... How about "don't use kermit
- without understanding some of it's options if you care about speed"?
-
- >I recently was using kermit on my 1200 baud (gasp!) modem to load files
- >from a unix box to my PC. The actual data transfer rate with kermit was
- >about 30-35 cps.
-
- You almost certainly had 8-bit quoting enabled on this transfer so that
- every character with the high bit set is transferred as two characters.
- I think if stripping the high bit puts the character in the control
- range it is sent as 3 characters. Anyway, modern equipment almost
- never needs this option. If you are even considering any other
- file transfer protocol you don't need it. If you do a "set parity
- none" on the unix version it will be turned off automatically.
- Modern versions of kermit will also let you use large packets and
- the most recent will let you set a number of windows for the protocol
- with will speed things up a bit. However, there is no way to avoid
- the overhead of control-character quoting with the kermit protocol.
- Every character in the control range is always sent as two characters
- no matter what options you have set. This has the advantage of
- working under conditions where other protocols fail, but it will
- slow down the transmission of files with many characters in this range.
-
- Les Mikesell
- les@chinet.chi.il.us
-