Hi,   
      
   On 2017-01-18 12:45:23, Nick Andre wrote to Wilfred Van Velzen:   
     about: "Re: %HELP ?":   
      
    WV>>  NA> -R to RESCAN connected areas.   
    WV>>   
    WV>> Isn't that a very dangerous option? It's only save for nodes with no   
    WV>> other links, otherwise a massive dupe dump would be generated.   
      
    NA> Wrong, and not any more dangerous than any other tosser that has Rescan.   
      
    NA> A tosser has an area called ABC. There are three downlinks. 229/100,   
    NA> 229/200 and 229/300. A new system, 229/400 joins and Areafixes ABC with a   
    NA> rescan. They get all the messages but 100, 200 and 300 do not because they   
    NA> exist in the Seen-by's in all the messages that exist already, and thus   
    NA> 229/400 is added into the Seen-by's/Path going forward.   
      
   In that case there won't be too much danger. But your thinking too much about   
   the fidonet structure of the 80's and 90's. The new node that does the   
   rescanning today, is likely to have a few other links outside the net and/or   
   zone, that won't be in the seenby's.   
      
    NA> The method used is no different than Gecho, TBBS/Flame and a lot of   
    NA> tossers out there... pretty sure even Fastecho does it this way but   
    NA> perhaps adds some extra kludging to indicate that the message was in   
    NA> fact, rescanned.   
      
   The danger of the d'Bridge rescan is that it does a full rescan of all   
   connected area's. Most tossers have commands to just rescan newly added areas,   
   or just rescan a single area, and limit the number or date range of messages.   
   For instance fastecho has the following commands regarding rescanning:   
      
    %RESCAN                      <- Rescan following area(s) and add if area(s)   
    FASTECHO.GER                    is/are not linked yet   
      
    %DAYS 7                      <- Rescan only messages not older than 7 days   
    SHAREWRE   
      
    %MSGS 100                    <- Rescan at most 100 messages each area   
    FE_HELP   
      
    FDECHO, R                    <- Alternative way to rescan a single area   
    FDECHO.GER, R=300            <- Rescan up to 300 messages of that area   
      
      
   Bye, Wilfred.   
      
      
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