Cognition | Blockdiff: How we built our own file format for VM disk snapshots
We made it open-source here: https://github.com/CognitionAI/blockdiffUsually, I’m a researcher working on areas like RL for coding agents – but one day I became annoyed by our slow VM startup times. So I took the plunge into systems engineering and built the first version of our VM hypervisor called otterlink. It now powers both our research & all of Devin production workloads.Devin writes and runs code in a VM environment. Why VMs instead of Docker? For untrusted user workloads we require full ...
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