Date: Wed, 24 Apr 2002 11:23:28 -0500 From: Eric_Stanfield@kenokozie.com To: Tom Samplonius <tom@sdf.com> Cc: bv@wjv.com, freebsd-isp@FreeBSD.ORG, msergeant@looksmart.net, owner-freebsd-isp@FreeBSD.ORG Subject: Re: HTTP Load Balancing and Availability Solutions Message-ID: <OF3FFDF25C.D0FE4BAA-ON86256BA5.0059F7EE@kka.com>
next in thread | raw e-mail | index | archive | help
.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
<tom@sdf.com> To: Mark Sergeant <msergeant@looksmart.net>
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?OF3FFDF25C.D0FE4BAA-ON86256BA5.0059F7EE>