Groups > comp.databases.postgresql > #647

Re: how to count the number of ipv6 addresses in a range?

From	Ralf Döblitz <doeblitz@doeblitz.net>
Newsgroups	comp.databases.postgresql
Subject	Re: how to count the number of ipv6 addresses in a range?
Date	2015-04-02 16:48 +0000
Organization	private site in Braunschweig, Germany
Message-ID	<mfjrt4$m8m$2@selene.doeblitz.net> (permalink)
References	<55197d18$0$2962$426a34cc@news.free.fr> <mfcaof$bmu$1@dont-email.me> <551a4f3d$0$3031$426a34cc@news.free.fr>

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Mateusz Viste <mateusz.viste@localhost> wrote:
> Hi,
> 
> You are right of course, the scale of addresses count is far wider than 
> what I imagined (and I didn't take the time to do a proper calculation). 
> Thanks for the clue :)
> 
> I will have to think about an alternative method of comparing ranges - 
> the need is simply to tell "this range is larger than that one", so an 
> exact count of IP addresses is not necessary.

I would use the binary logarithm of the number of addresses.

Ralf
-- 
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Thread

how to count the number of ipv6 addresses in a range? Mateusz Viste <mateusz.viste@localhost> - 2015-03-30 18:43 +0200
  Re: how to count the number of ipv6 addresses in a range? "M. Strobel" <strobel@example.com> - 2015-03-30 22:13 +0200
    Re: how to count the number of ipv6 addresses in a range? "M. Strobel" <strobel@example.com> - 2015-03-31 01:25 +0200
    Re: how to count the number of ipv6 addresses in a range? Mateusz Viste <mateusz.viste@localhost> - 2015-03-31 09:39 +0200
      Re: how to count the number of ipv6 addresses in a range? "M. Strobel" <strobel@example.com> - 2015-03-31 09:56 +0200
        Re: how to count the number of ipv6 addresses in a range? Mateusz Viste <mateusz.viste@localhost> - 2015-03-31 11:03 +0200
      Re: how to count the number of ipv6 addresses in a range? Ralf Döblitz <doeblitz@doeblitz.net> - 2015-04-02 16:48 +0000
        Re: how to count the number of ipv6 addresses in a range? Mateusz Viste <mateusz.viste@localhost> - 2015-04-03 09:09 +0200
          Re: how to count the number of ipv6 addresses in a range? Ralf Döblitz <doeblitz@doeblitz.net> - 2015-04-03 13:17 +0000

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