From owner-freebsd-isp Wed Apr 24 9:28:37 2002 Delivered-To: freebsd-isp@freebsd.org Received: from smtp.kka.com (smtp.kka.com [63.141.65.2]) by hub.freebsd.org (Postfix) with ESMTP id 4635637B429; Wed, 24 Apr 2002 09:28:28 -0700 (PDT) Subject: Re: HTTP Load Balancing and Availability Solutions To: Tom Samplonius Cc: bv@wjv.com, freebsd-isp@FreeBSD.ORG, msergeant@looksmart.net, owner-freebsd-isp@FreeBSD.ORG X-Mailer: Lotus Notes Release 5.0.8 June 18, 2001 Message-ID: From: Eric_Stanfield@kenokozie.com Date: Wed, 24 Apr 2002 11:23:28 -0500 X-MIMETrack: Serialize by Router on Notes1st/Keno(Release 5.0.4 |June 8, 2000) at 04/24/2002 11:23:56 AM MIME-Version: 1.0 Content-type: text/plain; charset=us-ascii Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org .001% = .00001 not .001 in your calculations. 10% is .10 in decimal. 1% is .01. etc etc -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Eric Stanfield, K2Access Keno Kozie Associates 222 N LaSalle #1500 Chicago, IL 60606 (312) 332-3000 Tom Samplonius To: Mark Sergeant Sent by: cc: bv@wjv.com, freebsd-isp@FreeBSD.ORG owner-freebsd-isp@F Subject: Re: HTTP Load Balancing and reeBSD.ORG Availability Solutions 04/24/2002 10:31 AM On 24 Apr 2002, Mark Sergeant wrote: > 99.999 is less than an hours down time per year which running off one ... I don't get that: 365 days per year x 24 hours per day x 60 minutes per hour = 525,600 minutes per year 525,600 minutes per year x 0.001 percent down = 525.6 minutes per year down I think you might be thinking of 99.9999% reliability, which would be 52.5 minutes per year. Usually, when I hear people talk about 4 nine reliability, they are talking about the decimal portion. I believe banks and telephone companies operate on a 4 nines reliability basis. Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message