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RE: availability and resiliency
> From: Lionel Lauer [mailto:[email protected]] > Sent: Friday, September 29, 2000 10:54 AM > > On Fri, 29 Sep 2000 17:39:04 +0100, Andrew Bangs <[email protected]> > wrote: > > > > >On Thu, Sep 28, 2000 at 02:39:40PM -0600, Irwin Lazar wrote: > >> Hi all, > >> Does anyone know if a template exists for what it takes to > provide 5 9's of > >> availability, 4 9's etc.for Internet data centers? > Specifically I'm looking > >> for something that would say "if you want 5 9's of > availability, here's what > >> you need to do", and so on. > > > >For 5 9s you need: > > > >1) Lots of money > >2) Lots of clue > >3) Lots of luck > >4) Lots of balls > > > >You can do 4 9s with any 3 of the above. > > Too true. > > But you forgot to include 'halfway-clued management' - > without that you > haven't got a hope in hell of even getting three 9's. ;) Covered under 2 (above). You need clued mgmnt even to ask for it, let alone "pay" for it. Non-clued management gets ingress filtered at the initial cost estimate layer, for cost-estimate layers that are properly operational.