From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <56266870.9050204@mail.com> References: <56266870.9050204@mail.com> Date: Tue, 20 Oct 2015 18:16:32 +0100 Message-ID: From: Charles Forsyth To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary=089e013c6b6266de2005228c6ce6 Subject: Re: [9fans] About IL Topicbox-Message-UUID: 745ddcba-ead9-11e9-9d60-3106f5b1d025 --089e013c6b6266de2005228c6ce6 Content-Type: text/plain; charset=UTF-8 On 20 October 2015 at 17:14, Adriano Verardo wrote: > Could IL be actually more effective than TCP/IP in a closed net ? > I think about a robotic application using very small cpus. > What about Styx -- ore something similar - over IL ? > Styx is (now) the same as 9P, and it was always similar: not a transport protocol, but a service protocol that ran on any suitable transport, and not just on IP networks. We used a special link-level transport protocol over infra-red to use Styx to talk to a programmable Lego brick from Inferno. It did run-length encoding, and possibly some other compression scheme. All you need is a transport protocol that reliably preserves content and order. It doesn't need to keep record boundaries, although transport protocols are sometimes simpler if you do, working with messages instead of a raw byte stream. It doesn't need to be an Internet Protocol (ie, there doesn't need to be an IP layer). 9P itself will multiplex many clients on the same connection to a server, so you don't need a higher-level multiplexing protocol using ports etc. In fact, using attach names, you can have several different server trees served on the same connection to many different clients. --089e013c6b6266de2005228c6ce6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

= On 20 October 2015 at 17:14, Adriano Verardo <adriano.verardo@mail= .com> wrote:
Could IL be actually more effect= ive than TCP/IP in a closed net ?
I think about a robotic application using very small cpus.
What about Styx -- ore something similar - over IL ?

Styx is (now) the same as 9P, and it was always similar: not = a transport protocol, but a service protocol that ran on any suitable trans= port,
and not just on IP networks. We used = a special link-level transport protocol over infra-red to use Styx to talk = to a programmable Lego brick from Inferno. It did run-length encoding, and = possibly some other compression scheme.
All you need is a transport protocol that= reliably preserves content and order. It doesn't need to keep record b= oundaries,
although transport protocols are= sometimes simpler if you do, working with messages instead of a raw byte s= tream.
It doesn't need to be an Interne= t Protocol (ie, there doesn't need to be an IP layer). 9P itself will m= ultiplex many clients
on the same connectio= n to a server, so you don't need a higher-level multiplexing protocol u= sing ports etc.
In fact, using attach names= , you can have several different server trees served on the same connection= to many different clients.
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