[HECnet] Third Release of Route20 User Mode DECnet Router

[Supratim Sanyal]

This reminds me - I had ROUT20 on Hecnet for months - first on Linux then on FreeBSD - worked great with Bob Armstrong at the other end. I took it off due to reasons I do not remember fully - but was probably when Bob discovered something when we were trying DDCMP ... maybe Bob or Paul remembers more?


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Supratim Sanyal, W1XMT
39.19151 N, 77.23432 W
QCOCAL::SANYAL via HECnet


> On Oct 10, 2020, at 5:55 PM, Rob Jarratt <robert.jarratt at ntlworld.com> wrote:
> 
> 
> 
>> -----Original Message-----
>> From: owner-hecnet at Update.UU.SE <owner-hecnet at Update.UU.SE> On Behalf
>> Of Paul Koning
>> Sent: 10 October 2020 21:51
>> To: hecnet at Update.UU.SE
>> Subject: Re: [HECnet] Third Release of Route20 User Mode DECnet Router
>> 
>> 
>> 
>>> On Oct 10, 2020, at 5:11 AM, Rob Jarratt <robert.jarratt at ntlworld.com>
>> wrote:
>>> 
>>> Hello Everyone,
>>> 
>>> As some of you may be aware, I have been writing my own DECnet router.
>> Since the last formal release a few years ago I have added a few things, the
>> details are here https://github.com/rjarratt/Route20. These were all on the Dev
>> branch, which I know a few people have tried. I have been running the Dev
>> branch for a long time myself, so I am sure it is stable. All I have done really is
>> make the current Dev branch “official” by merging it to the master branch.
>>> 
>>> I know Paul has been much more active than me lately on this front, so I am
>> probably a bit behind, but if anyone would like to take a look that would be
>> great.
>> 
>> I'll have to look at your work, have not done that in a long time.
> 
> To be honest, I have never actually looked at PyDECnet! But I should again acknowledge that you have provided me with invaluable help and insight.
> 
>> 
>> My 2 cents worth: we're aiming at different things.  I set out to build a full
>> DECnet implementation in Python, with emphasis on supporting all the parts of
>> the architecture in a very straightforward way.  Efficiency was very much a
>> secondary consideration.  As it happens, the performance is not bad, adequate
>> for a lot of purposes.
> 
> 
>> 
>> A C based implement such as you did is somewhat harder to write, but much
>> more efficient.  For anyone who is running on a slow machine, or under heavy
>> load, your work is likely to be the right answer.  Also, of course, if you want to
>> run on a machine where Python is not available or not efficient.
>> 
> 
> My principal aim was to make it portable to as many machines as possible. Not only from a language point of view but also from a resources point of view. For both those reasons C is indeed a better language. So, yes, I think my implementation is likely to work on a wider range of machines. I have not written it to be particularly fast though, my implementation is quite naïve in many respects, because I wanted to keep it simple. I do want to support more parts of DECnet, but time is the usual enemy here.
> 
> Regards
> 
> Rob
> 
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