DeepDive - Why AI Agents Need a Different Cloud Runtime

Agent Substrate is an open-source, secure-by-default agent execution runtime engineered to run millions of sandboxes with 10x higher density than standard container runtimes. Purpose-built for the era of autonomous agents, Substrate delivers sub-500ms resume operations at over 500 suspend/resume activations per second with a native zero-trust kernel and network isolation. Google simultaneously launched Filestore agent volumes: dynamically provisioned persistent filesystems for those sandboxes. They attach in milliseconds, have per-workspace isolation, pay-for-use lifecycle management, and even support RWX + POSIX locking, so several agents can work against the same project tree without simply passing giant blobs through prompts.

Summary:

• Traditional cloud infrastructure: request → process/container → response → process continues/dies
• Agents behave differently: start → reason → call tool → wait 20 sec → reason → ask human → wait 4 hours → resume → spawn 5 subagents → share files → wait → continue tomorrow = Keeping a full VM/container actively allocated through that lifecycle is wasteful.
• Google's architecture suggests: different agent runtime, please see [1] and [2].
• [1] - Agent Substrate available on GKE | Google Cloud Blog
• [2] - Filestore agent volumes | Google Cloud Blog