Date: Wed, 24 Apr 2002 16:07:52 -0400 From: Bill Vermillion <bv@wjv.com> To: freebsd-isp@freebsd.org Subject: Re: HTTP Load Balancing and Availability Solutions Message-ID: <20020424200752.GF89347@wjv.com> In-Reply-To: <Pine.BSF.4.05.10204240824450.6896-100000@misery.sdf.com> References: <1019656776.38204.17.camel@xyzzy.intranet.snsonline.net> <Pine.BSF.4.05.10204240824450.6896-100000@misery.sdf.com>
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-segmentation fault- press any key to reboot Damn damn damn Tom Samplonius said, after restarting his PC and mailer on Wed, Apr 24, 2002 at 08:31 . > > 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. Five nines. 99.99999 is the standard for telcos, etc. The highend bank machines such as Tandem are often speced to six 9's. Now THAT is serious. -- Bill Vermillion - bv @ wjv . com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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