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All posts tagged “architecture”

Tag: architecture

Obtainability, Part 1: The Other Half of Scarcity

You went to Spot VMs for the discount and did the homework: checkpoint code, a drain handler, a preemption survived. Then a job sat in Pending for days across three regions and never got a single L4. Scarcity grew a second half. Interruption is losing capacity you have; obtainability is failing to get capacity at all, and you can't checkpoint your way out of a stockout. Part 1 of the series that builds the probe the Compute Fallback Ladder left unbuilt.

Compute Scarcity Is Permanent. Build a Ladder.

Every resilience pattern you know assumes the machine shows up. Accelerator scarcity breaks that assumption, and the pattern catalogs have not caught up. Here is the Compute Fallback Ladder—an ordered set of rungs your workload can run on, a selector that picks the highest obtainable one, and a promotion path back up when capacity returns.