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- Xref: sparky comp.dcom.modems:12990 comp.mail.uucp:1744
- Path: sparky!uunet!sun-barr!olivea!sgigate!sgiblab!bazooka!ti
- From: ti@bazooka.amb.org (Ti Kan)
- Newsgroups: comp.dcom.modems,comp.mail.uucp
- Subject: UUCP 'G' protocol packet size
- Message-ID: <1079@bazooka.amb.org>
- Date: 4 Sep 92 17:34:37 GMT
- Reply-To: ti@bazooka.amb.org (Ti Kan)
- Followup-To: comp.dcom.modems
- Organization: AMB Research Labs, Sunnyvale, CA.
- Lines: 33
-
- I have been playing around with the UUCP 'G' protocol by increasing
- my uucico's supported window size from 3 to 7. This yielded a nice
- ~20% boost in throughput when transferring compressed news batches.
- This appears to have no ill effects as far as compatibility with other
- systems go.
-
- I have recently acquired the "Managing UUCP and Usenet" book from
- O'Reilly and in the G-Protocol Appendix, it gives a table of "K-Byte
- Value" in the packet header and the corresponding "Data Segment
- Length" in bytes (Pg. 313). The table lists lengths as high as
- 4096 bytes. I am assuming in this case "data segment == packet".
- Also, on Pg. 321 it says that although the G protocol allows for
- data packets with different K-values (physical lengths) to be sent
- in a session, in practice both ends always use the value negotiated
- at the start of the session. On Pg. 314 it indicates that the
- maximum data segment size to use is negotiated in the INITB phase
- of the initial handshake.
-
- With the previous paragraph in mind, I looked into the version of
- uucico that I'm using and found that the "packet size" is hardwired
- to 64 bytes. So the question is, is there any benefit in increasing
- this to something like 4096 bytes? Do I run the risk of making my
- uucico incompatible with other systems?
-
- Any information would be greatly appreciated...
-
- -Ti
- --
- /// Ti Kan vorsprung durch technik
- /// AMB Research Laboratories, Sunnyvale, CA. USA
- /// ti@bazooka.amb.org
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