[nos-bbs] Old BIDs

['Gustavo Ponza']

On 02/08/2017 05:42 PM, Michael Fox - N6MEF wrote:
> I was contacted yesterday by an FBB sysop because a bunch of old (> 1 year)
> WP bulletins have been flooding him.  The source of the old bulletins is
> probably someone restoring an old backup.
>
>
>
> But the issue is that they're being forwarded around the net over RF links.
> According to the FBB sysop, FBB immediately expires them upon receipt.  So
> it does not forward these old bulletins to others.  But, evidently, other
> BBSs do not do that.
>
>
>
> My understanding of JNOS is that expiry occurs as an "at" job.  I currently
> run it twice a day.  But even if it ran every hour, it still wouldn't stop
> such forwarding, since I might receive an old bulletin one minute and then
> connect to many other BBSs before the next hourly expiry function.
>
>
>
> One way to stop it would be to keep longer history.  I currently have JNOS
> set to keep 6 months of history.  But even a whole year of history wouldn't
> have stopped the current case because the bulletins were > 1 year old.
>
>
>
> Back in the 80s, CPU power and disk speed were not the same as today.  With
> the capabilities of today's machines, I'm wondering if it makes sense for
> JNOS to perform expiry on the fly.  That is, it would use the current
> rewrite process to determine the destination mailbox, and then look up the
> expiry interval for that mailbox, and, if the message is expired, then not
> save it to the mailbox.
>
>
>
> Perhaps there is another way?
>
>
>
> Michael
>
> N6MEF

The two basic methods I know are the 'epurmess' method
implemented by WA7MBL/F6FBB and similar oriented PBBSs
and the one perhaps more efficient/sophisticated
'purge/reorg' method adopted by the obcm and other
German PBBSs.

-- 

73 and ciao, gus i0ojj
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