RE: [Openmosix-devel] TCP connection (socket) migration

[Moshe B. <mo...@mo...>]

Wow! Great job. I actually have here a socket migration implementation, but
it is far less sophisticated than yours.

We'll look into it and see how we can integrate it with openMosix. We will
get back to you if there is anything on your side that can make integration
easier.

Many thanks

Moshe

-----Original Message-----
From: ope...@li...
[mailto:ope...@li...]On Behalf Of Werner
Almesberger
Sent: Thursday, December 19, 2002 8:45 AM
To: ope...@li...
Subject: [Openmosix-devel] TCP connection (socket) migration


I've recently worked a bit on TCP connection passing (tcpcp), which
allows ownership of a TCP connection endpoint to be transferred
between cooperating applications. (Plus, there must of course be
some mechanism to actually redirect network traffic, but tcpcp
doesn't depend on how this part works.)

I know that Mosix used (only) a less efficient mechanism involving
redirection through the original node, so I thought that this may
be of interest for openMosix, too.

My code is at http://www.almesberger.net/tcpcp/

The good news is that tcpcp seems to work. The bad news is that it
does so rather inefficiently (e.g. after migration, the connection
goes through slow start again, even if we could allow it to do
better), but I'm planning to fix this. tcpcp does nothing for
non-TCP sockets.

I actually consider it a feature of tcpcp that the application has
to be aware of what's happening, but if there is interest, I'll be
more than happy to add whatever interfaces are needed to make it
useful for openMosix or similar projects.

Of course, if you already have a better solution than tcpcp, I'd
like to hear about that as well :-)

I'm not subscribed to the openMosix mailing lists, so please Cc
me on any replies.

Thanks,
- Werner

--
  _________________________________________________________________________
 / Werner Almesberger, Buenos Aires, Argentina     we...@al... /
/_http://www.almesberger.net/____________________________________________/


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