Coolorange Cutover

Coolorange Cutover is the arithmetic of a migration night, for the engineer with a window, a list of steps and a promise to keep. Five tools work from figures you type here. Enter the steps with their durations and owners: the runbook gives each one a clock start and end, a running elapsed total and a planned finish. The change window adds your contingency, then names the point of no return, the last moment a rollback still finishes inside the window. The backup shelf turns a retention policy of fulls, dailies, weeklies and monthlies into gigabytes stored, the disk to buy for the free space you want, and how far back it reaches. Restore turns volume, throughput and overhead into an achievable recovery time and the throughput your target needs. A device register records each machine as found and as handed back on a four point scale, counting coverage, the mean move and anything that regressed on site. Every figure is computed here from what you typed, and a conventions sheet states the rules the arithmetic rests on. English and French, and sample data on first open.