01
The Cloud Concept
The definition of renting and its limit: measuring on-demand resources and elasticity, which decision each of the infrastructure, platform, and software service models hands over, the cost and control difference between public, private, and hybrid deployment, comparing the fixed and variable cost structure against an on-premises installation, and drawing the responsibility boundary between provider and customer item by item.
- 01 What Is Cloud Computing The measure of on-demand resources: in the same 120-day demand curve, the time from capacity request to use dropping from 30 days to 1 day, unmet requests under the peak-forming load falling from 84,689 to 1,260 and the days capacity ran short dropping from 15 to 2, idle capacity falling from 764 to 254 unit-days, while under a flat load the requests saved stay at zero, and the eight items that remain at exit dropping to four.
- 02 Service Models The measure of infrastructure, platform, and software service: in a set of 26 decisions, decisions handed over climbing from 5 to 23 and 25, the yearly touches on kept decisions dropping from 91 to 82, 19, and 4, the share of handovers recoverable via a parameter falling from 40% to 39% and 12%, 6, 5, 4, and 1 of six requirement requests being met, and the carried-over decision share at exit dropping from 100% to 92%, 69%, and 35%.
- 03 Deployment Models The measure of public, private, and hybrid deployment: in the same six-component workload, the public layout failing to place two components and six of seven call links failing to be established, control items kept running 8/24, 36/36, 20/36, and 28/36, fixed reserved capacity at 0%, 100%, 45%, and 75%, the elasticity window at 1.0, 21.0, 10.0, and 16.0 days, and hybrid paying 18 operating items, two identity directories, and six mapping items in both of its forms.
- 04 Comparison with On-Premises The measure of capital expense against operating expense: in the same 36-month usage curve, the break-even month landing at 15, 19, and 13 under the visible total, and at 36, past the window, and 23 under the full total, the items hidden under own hardware holding 64%, 55%, and 48% of the total, and 13% under renting, and the winner shifting as the exit month moves from 12 to 36 — from renting to own hardware in the flat curve, and back to renting in the peak-forming curve. Costs are fictional and are written in a fictional unit.
- 05 Shared Responsibility Model The measure of the boundary between provider and customer: in a 24-item responsibility matrix, items passing to the provider climbing from 6 to 16 and 20, items falling in the gap at 2, 4, and 5, overlapping items at 2, 4, and 2, eight incidents closing in a total of 56, 73, and 68 rounds, with 28, 35, and 35 of those rounds coming from the gap alone, 4, 5, and 4 of eight incidents closing with data loss, and carried-over items at exit dropping from 18 to 8 and 4.