[nos-bbs] mbox fbb setting

[jerome schatten]

Michael..

From Maiko’s manual:
mbox fbb [0 | 1 | 2]
Display or set the flag which enables FBB batched-style forwarding (1) or FBB 
compressed and batched forwarding (2), or standard WA7MBL-style forwarding (0). 
The setting is used to determine which forwarding capabilities we proposed to a 
another station.  The default value is determined by whether JNOS was compiled 
with FBBCMP and/or FBBFWD #define'd.  In any case, the forwarding method 
actually used is the intersection of capabilities of both stations involved in 
forwarding. Batched forwarding allows the forwarding direction to be reversed 
every 5 messages.  Compressed FBB forwarding requires a completely transparent 

I’ve never used fbb=1, just zero and two.  Logging doesn’t really reveal much other than what logged session was going on when jnos quit unexpectedly.  It was invariably during a forward session with a station running an fbb bbs and usually the same station.  When it does happen, Jnos exits with strange terminal behaviour that requires ‘resetting’ the terminal from the Linux command line. I usually (after a reboot)  change 'mbox fbb' from 2 to 0.
Now, understand that this is all on a raspberry pi on which I compiled the binary from source code.  I don’t know if this happens with i486x systems or not, I just cannot remember *(memory is almost 80 yrs. old). Ken’s system is also a Pi.
Best,
j.


 
> connection and uses Lempel Ziv Huffman compression.On Apr 1, 2016, at 08:31, Michael Fox - N6MEF <n6mef at mefox.org> wrote:
> 
> Thanks Jerome.
> 
> Yes, JNOS.  And, yes, RF links.
> 
> That's what I was afraid of (continued problems).  
> 
> I guess setting mbox fbb 2 in autoexec.nos and then using "!" (eschew FBB compression) in forward.bbs for FBB stations would effectively make the FBB session behave like mbox fbb 1, right?
> 
> But I heard there were also problems with fbb 1.
> 
> I know that JNOS 2.0j.7v has more detailed logging of the forwarding session.  Maybe that will help us isolate the case that causes the crash?
> 
> Also, when you say "crash", do you mean that JNOS exits, or does it hang?
> 
> M
> 
> 
> 
>> -----Original Message-----
>> From: nos-bbs [mailto:nos-bbs-bounces at tapr.org] On Behalf Of jerome
>> schatten
>> Sent: Friday, April 1, 2016 8:10 AM
>> To: TAPR xNOS Mailing List <nos-bbs at tapr.org>
>> Subject: Re: [nos-bbs] mbox fbb setting
>> 
>> Michael…  I assume you’re running jnos?
>> 
>> Fbb=0 yields no compression, so the exchange is in plain text when
>> forwarding. Fbb=2 gives you the compression, but sometimes produces weird
>> disconnects (fbb errors) when jnos is forwarding with a station running an
>> fbb system.  I leave mine set at fbb=2.  Ken is correct though… there are
>> instances where fbb=2 appears to crash jnos during a forward cycle if the
>> other station is running an fbb bbs.
>> 
>> Seems to me that unless you are running RF radio links, compression
>> doesn’t make much sense.
>> 
>> jerome - ve7ass
>> 
>>> On Apr 1, 2016, at 06:50, kd6oat <kd6oat at gmail.com> wrote:
>>> 
>>> I keep it set to 0. Tried fbb=2 a while back but after running for a
>> while it crashes my raspberry pi. I would be interested to know how to
>> solve the problem.
>>> Ken
>>> 
>>> On Thu, Mar 31, 2016 at 8:54 PM, Michael Fox - N6MEF <n6mef at mefox.org>
>> wrote:
>>> A while back, I recall that folks reported protocol errors and other
>> difficulties when trying to use mbox fbb 1 or mbox fbb 2.  But don’t
>> recall the particulars.
>>> 
>>> 
>>> 
>>> I’d like to move to either mbox fbb 1 or 2 to gain some efficiency.
>>> 
>>> 
>>> 
>>> What is everyone using today?
>>> 
>>> Are there any know problems with either mbox fbb1 or mbox fbb2?
>>> 
>>> 
>>> 
>>> Thanks,
>>> 
>>> Michael
>>> 
>>> N6MEF
>>> 
>>> 
>>> 
>>> 
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