On 2017-07-06, at 11:47, Allan Staller wrote: > In that case, "6 nines" 99.999999% > That's "8 nines".
> -----Original Message----- > From: Paul Gilmartin > Sent: Thursday, July 6, 2017 12:45 PM > On Thu, 6 Jul 2017 14:25:21 -0300, Clark Morris wrote: >>> >>> In the case of z/OS Parallel Sysplex, it is "5 nines" 99.99999% >>> > Errr... I count seven nines there. > https://en.wikipedia.org/wiki/High_availability#.22Nines.22 > >>> This equates to about 3 seconds of non-availability per year. >>> > Five nines would be about 5 minutes of non-availability per year. > https://en.wikipedia.org/wiki/High_availability#Percentage_calculation > >>> Tools/techniques exist in the *nix world to provide this availability (or >>> at least something much better that we currently receiving). It is a matter >>> of "IBM's will" to implement or not. >>> > Not "will", but economics. End-to-end reliability would be improved only > negligibly by improving server reliability multiple orders of magnitude above > the limiting factor, the Internet. However, I agree with the consensus that > KC isn't even close. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
