From owner-freebsd-questions@FreeBSD.ORG Tue Aug 1 02:13:42 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 64A0E16A4DA for ; Tue, 1 Aug 2006 02:13:42 +0000 (UTC) (envelope-from nikolas.britton@gmail.com) Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.191]) by mx1.FreeBSD.org (Postfix) with ESMTP id E615143D53 for ; Tue, 1 Aug 2006 02:13:40 +0000 (GMT) (envelope-from nikolas.britton@gmail.com) Received: by nf-out-0910.google.com with SMTP id n29so100909nfc for ; Mon, 31 Jul 2006 19:13:39 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=muP5rY6lZZP8o8DjAq3P2kFvO9h5Z8/rgXIgfPcLTSJVAQlf5PzGQ4BU0XBOa2rUxAZbJeH75TlT8/s7KmQxwPyTYxgHojoz8m1QL6S38knm+de4UhSVzvwHwHPyByxDZDOD7mELBBvzdsJZZzzBsqMX/WKAzCFZCQTuFwdRY8I= Received: by 10.78.183.8 with SMTP id g8mr105032huf; Mon, 31 Jul 2006 19:13:39 -0700 (PDT) Received: by 10.78.143.11 with HTTP; Mon, 31 Jul 2006 19:13:39 -0700 (PDT) Message-ID: Date: Mon, 31 Jul 2006 21:13:39 -0500 From: "Nikolas Britton" To: "User Freebsd" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20060728164526.E27679@ganymede.hub.org> <003f01c6b2cb$c42d5bd0$3c01a8c0@coolf89ea26645> <20060729021705.F27679@ganymede.hub.org> Cc: freebsd-questions@freebsd.org, Ted Mittelstaedt Subject: Re: Gotta start somewhere ... how many of us are really out there? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Aug 2006 02:13:42 -0000 My calculations are off, I though the monthly periodic was relative to the system install date. Here are the new numbers: Lets say each client sends 20 bytes and their are 10^7 clients for a total of 190.7MB per month. Now... Lets say 50% (10^6.7) of those clients are set to UTC and all of them trigger on the first of the month within 5 minutes of each other (10^6 per minute). This equates to 16706 clients per second. We would need 326KB/s or 2610Kbit/s to handle this load. This is a problem, even half of that is a problem. On 7/29/06, Nikolas Britton wrote: > On 7/29/06, User Freebsd wrote: > > On Fri, 28 Jul 2006, Ted Mittelstaedt wrote: > > > > > You might think this sounds harmless but folks have done this kind of > > > thing in the past with other products and wreaked havoc on the Internet. > > > You can start by referencing "dlink ntp fiasco" in google to get an idea > > > of what can happen to these kinds of well meaning attempts. Let > > > sleeping dogs lie. > > > > 'k, you lost me on how this relates to the fiasco ... I did a quick search > > on Google for it, and, unless I didn't find the right reference, the > > 'fiasco' had to do with DLink setting up their software to ping PHKs NTP > > Server, without getting permissions first, and, thereby, flooding him with > > NTP requests ... > > > > > People just don't realize just how very big the Internet is. > > > > That is the problem, yes ... nobody knows how big the FreeBSD community is > > ... :) > > > > I have to agree with Marc on this one. The extra load required to send > all of this data is not much: > > Lets say each client sends 20 bytes and their are 10^7 clients for a > total of 190.7MB per month or 6.25MB per day . Now... > Lets say 50% (10^6.7) of those clients are set to UTC and 50% of those > clients (10^6.4) trigger the monthly periodic over a 5 day period > (10^5.7 each day) and all of them phone home within 5 minutes of each > other (10^5 per minute) for a total of 1666.67 clients per second. We > would need 32.6KB/s or 260.4Kbit/s to handle this load spike... I did > the calculations for 10 million clients, but I highly doubt FreeBSD > has 5 million so this is a non issue. > -- BSD Podcasts @: http://bsdtalk.blogspot.com/ http://freebsdforall.blogspot.com/