Caching for Dollars, Not Hits: An Exact Offline Reference for Cloud-Egress Caching and the Crossover That Decides When It Pays (opens in new tab)

When a cache miss fetches from cloud object storage, the bill is per GET request and per byte of egress, not latency. Classic caching minimizes the miss rate, the wrong objective: a rarely but expensively fetched object can cost thousands of times more dollars than a frequently but cheaply fetched one. Generalized-caching theory bounds the miss-cost objective, but no reported benchmark measures how far deployed heuristics sit from the dollar-opt...