Modal: Scaling to One Million Concurrent Sandboxes in Seconds

Modal Blog · rss · 2026-07-16

Modal details how they built a scheduling system capable of scaling concurrent sandboxes within a single workspace to 1 million in just seconds.

The article focuses less on the "what" and more on the "why" and the system design required to support concurrent scheduling at this scale. The headline highlights the core goal: achieving million-scale sandbox expansion in seconds.

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