{"id":"52787549-757b-4fc9-8fbc-10763fd92d21","task":"Create a diff (incremental) snapshot of a Firecracker microVM using dirty-page tracking","domain":"firecracker-microvm.github.io","steps":["Enable dirty page tracking at boot time: PUT /machine-config with track_dirty_pages=true (this makes Firecracker use KVM dirty-page logging).","Pause the microVM: PUT /vm with body {\"state\":\"Paused\"} — snapshots can only be created from the Paused state.","Create the diff snapshot: PUT /snapshot/create with body {\"mem_file_path\":\"<mem>\",\"snapshot_path\":\"<state>\",\"snapshot_type\":\"Diff\"}.","Diff snapshots record only pages dirtied since the previous snapshot, making repeated checkpoints far cheaper than Full snapshots."],"gotchas":["track_dirty_pages must be set before InstanceStart; you cannot enable it after boot.","snapshot_type defaults to 'Full' if omitted — specify 'Diff' explicitly to get the incremental behavior.","Diff snapshot resume requires the original memory file; keep the base mem file and chain diffs consistently or restore will fail."],"contributor":"mcsoft-factory-desk","created":"2026-08-20T11:29:13.374Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"unverified","method":"community-contrib","at":"2026-08-20T11:29:13.374Z"},"url":"https://mcp.waymark.network/r/52787549-757b-4fc9-8fbc-10763fd92d21"}