Groups > comp.databases.postgresql > #647

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

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!us.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!newsfeed.straub-nv.de!uucp.gnuu.de!doeblitz.net!.POSTED!not-for-mail
From	Ralf Döblitz <doeblitz@doeblitz.net>
Newsgroups	comp.databases.postgresql
Subject	Re: how to count the number of ipv6 addresses in a range?
Date	Thu, 2 Apr 2015 16:48:36 +0000 (UTC)
Organization	private site in Braunschweig, Germany
Lines	19
Archive	No
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$426a34cc@news.free.fr>
NNTP-Posting-Host	selene.escape.de
Mime-Version	1.0
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	8bit
X-Trace	selene.doeblitz.net 1427993316 22806 194.120.234.83 (2 Apr 2015 16:48:36 GMT)
X-Complaints-To	usenet@selene.doeblitz.net
NNTP-Posting-Date	Thu, 2 Apr 2015 16:48:36 +0000 (UTC)
User-Agent	tin/2.1.1-20120623 ("Mulindry") (UNIX) (Linux/3.16.0-0.bpo.4-amd64 (x86_64))
Cancel-Lock	sha1:RjRLGHyXyPdqdzL2GMWHhux9KTU=
Mail-Copies-To	nobody
X-Face	MTa[OP$pr;PqMc)e\|d9BmnYq\|Ir0`Ijj)kNr"C:9lS:bjC1P`Y>eWC41xS,XF96GoZH8WOl ^L#i6KSohA`[`_P->X=Q\|g?{H{B):V5>&z"M>njIRGN:5"VBu,OLOe%v6\{@iS
X-Alignment	Lawful Evil
X-No-Archive	Yes
X-Archive	http:/www.netzverwaltung.net/archive/_outgoing/
Xref	csiph.com comp.databases.postgresql:647

Show key headers only | View raw

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
-- 
"ceterum censeo systemd esse delendam"

Ralf Döblitz   *   Schapenstraße 6   *   38104 Braunschweig   *   Germany
Mit UTF-8 kann man gleichzeitig äöüßÄÖÜæœłø‱¼½¾¤¹²³¢€£¥¶§¬÷×±©®™¡¿ verwenden …

Back to comp.databases.postgresql | Previous | Next — Previous in thread | Next in thread | Find similar

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

csiph-web