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Re: combine newsgroups from two or more servers? And expiry?

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On 2025-05-26 03:01, VanguardLH wrote:
> "J. P. Gilliver" <G6JPG@255soft.uk> wrote:
> 
>> I have set up (service from) two news servers, but they remain separate
>> - any newsgroup that's on both appears as a separate entity, with
>> articles/threads having different "read/not read" status.
>>
>> Is there any way to merge them, so that I only see one set - or, at
>> least, when I read a post in one, it's marked read in the other?
> 
> Different NNTP servers will have different article numbers for the same
> article.  When an article is received, that NNTP will index it in its
> own articles and overview databases.  NNTP servers do not synchronize on
> the article numbers they assign.  They are independent of each other.
> The Message-ID (MID) header will be the same when an article gets peered
> to other NNTP servers, but the article numbers at an NNTP server are
> unique to each NNTP server.  So, an article you retrieve via an article
> number on one NNTP server will not be the same article number on a
> different for the same article.

Leafnode stores them by message-id, if I remember right (I don't have it 
installed in this machine, I can't check).

> 
> Think of like paper currency.  You and someone else might both have a
> one dollar bill, but each has a different serial number.  That one is
> ripped doesn't mandate the other is also ripped.  You are viewing
> different articles on different servers that have the same content.
> 
> The suggestions by others to use a local leech server retrieving
> articles from multiple servers has you probably matching on MIDs, and
> presenting just 1 copy of the same article by MID across multiple
> servers.  The local server detects the duplicate articles by MID, and
> keeps only 1, so your NNTP client connecting to that local server only
> finds the 1 copy.  I've not used Leafnode to know how it manages
> duplicate articles having different article numbers, but with the same
> MID at each server.

Right.

-- 
Cheers,
        Carlos E.R.

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combine newsgroups from two or more servers? And expiry? "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-05-25 10:51 +0100
  Re: combine newsgroups from two or more servers? And expiry? Andy Burns <usenet@andyburns.uk> - 2025-05-25 15:56 +0100
  Re: combine newsgroups from two or more servers? And expiry? Paul <nospam@needed.invalid> - 2025-05-25 11:30 -0400
    Re: combine newsgroups from two or more servers? And expiry? "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-06-01 13:32 +0100
      Re: combine newsgroups from two or more servers? And expiry? Paul <nospam@needed.invalid> - 2025-06-01 14:03 -0400
  Re: combine newsgroups from two or more servers? And expiry? James <invalid@invalid.invalid> - 2025-05-25 15:36 +0000
    Re: combine newsgroups from two or more servers? And expiry? "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-06-01 12:58 +0100
  Re: combine newsgroups from two or more servers? And expiry? "Carlos E. R." <robin_listas@es.invalid> - 2025-05-25 21:11 +0200
    Re: combine newsgroups from two or more servers? And expiry? dillinger <dillinger@invalid.not> - 2025-05-25 23:10 +0200
      Re: combine newsgroups from two or more servers? And expiry? "Carlos E. R." <robin_listas@es.invalid> - 2025-05-26 13:28 +0200
    Re: combine newsgroups from two or more servers? And expiry? Ralph Fox <-rf-nz-@-.invalid> - 2025-05-26 17:50 +1200
      Re: combine newsgroups from two or more servers? And expiry? "Carlos E. R." <robin_listas@es.invalid> - 2025-05-26 13:34 +0200
    Re: combine newsgroups from two or more servers? And expiry? "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-06-01 13:40 +0100
      Re: combine newsgroups from two or more servers? And expiry? Andy Burns <usenet@andyburns.uk> - 2025-06-01 14:05 +0100
        Re: combine newsgroups from two or more servers? And expiry? "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-06-03 13:38 +0100
      Re: combine newsgroups from two or more servers? And expiry? Paul <nospam@needed.invalid> - 2025-06-01 15:36 -0400
        Re: combine newsgroups from two or more servers? And expiry? "J. P. Gilliver" <G6JPG@255soft.uk> - 2025-06-03 13:50 +0100
      Re: combine newsgroups from two or more servers? And expiry? "Carlos E.R." <robin_listas@es.invalid> - 2025-06-04 15:23 +0200
  Re: combine newsgroups from two or more servers? And expiry? VanguardLH <V@nguard.LH> - 2025-05-25 20:01 -0500
    Re: combine newsgroups from two or more servers? And expiry? "Carlos E. R." <robin_listas@es.invalid> - 2025-05-26 13:37 +0200
      Re: combine newsgroups from two or more servers? And expiry? "Gary R. Schmidt" <grschmidt@acm.org> - 2025-05-27 16:01 +1000
      Re: combine newsgroups from two or more servers? And expiry? "Carlos E.R." <robin_listas@es.invalid> - 2025-06-04 15:18 +0200
  Re: combine newsgroups from two or more servers? And expiry? "s|b" <me@privacy.invalid> - 2025-05-26 16:54 +0200

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