Re: [Netconsole-devel] protocol?

[James S. <ja...@ca...>]

On Fri, 1 Jun 2001, William R Sowerbutts wrote:

> On Fri, Jun 01, 2001 at 03:21:30PM +0100, James Sutherland wrote:
> >On Fri, 1 Jun 2001, Ferric wrote:
> >
> >> hi,
> >>
> >> was a decision regarding which protocol (TCP|UDP) was going to be
> >> used taken? if so, has the stack already been written?
> >
> >UDP, and not yet: still waiting for protocol definition... I'm very busy
> >for the next week or two, then hope to do make a start on some code then.
>
> Part IB exams, eh? ;-)  I've got my Part IIs starting Tuesday ... cane ...
>
> May I ask the reasons behind using UDP rather than TCP? Surely we will end up
> reimplementing a number of the features offered by TCP such as automatic
> retransmission, data integrity, rearrangement of packets that arrive
> out-of-order, etcetera.

Yes, there will be some duplication of effort, but remember one
environment to support is boot-time - and in some cases, we have support
from the BIOS (or NIC's firmware) for UDP sending, but not for TCP. There
are a few other reasons, which HPA and I discussed briefly on lkml just
before this project was set up on SourceForge...


James.