Checkpointing - Bryant McGill

# Checkpointing **Entity class:** Concept or analytic term **Domain:** Distributed Computing / Storage / Fault Tolerance **Doc Type:** Technical Concept Node **Maturity:** Developed ## Definition **Checkpointing** is the periodic persistence of sufficient computational state to resume useful work after interruption or failure. ## Governing Variable Checkpointing governs recoverable progress: how much completed computation survives a fault and how quickly execution can restart. ## Material and Computational Manifestation Large training jobs may preserve model parameters, optimizer state, scheduler state and data position across distributed storage. The checkpoint path therefore joins accelerator memory, network bandwidth, storage throughput and consistency logic. ## Relation to Governance At scale, component failure is expected. Checkpoint policy decides which state counts as durable, how often the system pays the cost of persistence and which prior state can authoritatively restore the computation. ## Constitutional Question and Failure Modes Checkpoints create continuity but can preserve corrupted or unauthorized state. Failure modes include inconsistent snapshots, storage congestion, excessive recovery time, silent incompleteness and retention policies that make rollback impossible or expose sensitive model state. ## Related Ontology [[wiki/Fault-Tolerant Computing|Fault-Tolerant Computing]] · [[wiki/NVMe over Fabrics|NVMe over Fabrics]] · [[wiki/Systems of Record|Systems of Record]] · [[wiki/AI Factory|AI Factory]] · [[wiki/Continuous Reconciliation|Continuous Reconciliation]] ## Relationships  This entry is routed through [[collections/Consciousness Continuity|Consciousness Continuity]], [[collections/Neurotech|Neurotech]], and [[collections/Machine Succession|Machine Succession]]. Its source context is developed in [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]] and [[articles/Technologies for Consciousness Mapping and Transfer|Technologies for Consciousness Mapping and Transfer]]. Status-qualified source edges are preserved in the terminal Research Edges section. ### Connections in this corpus - **Checkpointing** is connected in the corpus with [[wiki/Forked Identity|Forked Identity]]. - **Checkpointing** is connected in the corpus with [[wiki/Fission and Fusion of Persons|Fission and Fusion of Persons]]. - **Checkpointing** is connected in the corpus with [[wiki/Digital Identity Succession|Digital Identity Succession]]. - **Checkpointing** is connected in the corpus with [[wiki/Continuity Provenance|Continuity Provenance]]. - **Checkpointing** is connected in the corpus with [[wiki/Personal Authoritative State|Personal Authoritative State]]. ### Additional Documented Relationships - The technical comparison identifies a convergence: **Checkpointing** is associated with [[wiki/Forked Identity|Forked Identity]]. Restoring same state more than once is trivial for software. producing fork problem for digital personhood.  ## Read First in the Wiki  - [[wiki/AI Factory|AI Factory]] — supplies the related concept or analytic term context needed to place **Checkpointing** within the wider system.  ## Related Work in the Corpus  - In [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]], **VI. A person is a folder full of JSON files** provides the narrative context for **Checkpointing**: So imagine the Continuity Sidecar as a signed manifest plus its irreducible payload.  ## Research Edges  #### Host–residual infrastructure patch — 2026-09-10 **Resolved aliases:** `checkpoint/restore` **Collections:** [[collections/Consciousness Continuity|Consciousness Continuity]] · [[collections/Neurotech|Neurotech]] · [[collections/Machine Succession|Machine Succession]] **Canonical source article:** [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]] **Related acquisition source:** [[articles/Technologies for Consciousness Mapping and Transfer|Technologies for Consciousness Mapping and Transfer]] **Relationship source:** [[research/Mind Uploading and AI Host-Residual Ecosystem Relationship Graph - 2026-09-10|Mind Uploading and AI Host-Residual Ecosystem Relationship Graph — 2026-09-10]] #### Outgoing typed edges - **HR-0169 — `creates_risk_of` → [[wiki/Forked Identity|duplicate active instances]]** — **ANALYTIC CONVERGENCE**; evidence `WEB_CRIU`, `WEB_QEMU_MIGRATION`, `WIKI_ARCHIVE`. Restoring same state more than once is trivial for software, producing fork problem for digital personhood. - **HR-0313 — `wiki_links_to` → [[wiki/AI Factory|AI Factory]]** — **EXISTING WIKI EDGE**; evidence `WIKI_ARCHIVE`. Direct internal link currently present in `Checkpointing.md`. - **HR-1367 — `cross_threads` → [[wiki/Forked Identity|Forked Identity]]** — **HIGH VALUE CROSS THREAD**; evidence `ARTICLE`, `WIKI_ARCHIVE`. Restoring one checkpoint more than once creates multiple descendants with identical pre-branch state. - **HR-1368 — `cross_threads` → [[wiki/Fission and Fusion of Persons|Fission and Fusion of Persons]]** — **HIGH VALUE CROSS THREAD**; evidence `ARTICLE`, `WIKI_ARCHIVE`. Checkpoint duplication is a concrete computational fission analogue. - **HR-1369 — `cross_threads` → [[wiki/Digital Identity Succession|Digital Identity Succession]]** — **HIGH VALUE CROSS THREAD**; evidence `ARTICLE`, `WIKI_ARCHIVE`. Checkpoint migration requires identity continuity across substrate changes. - **HR-1370 — `cross_threads` → [[wiki/Continuity Provenance|Continuity Provenance]]** — **HIGH VALUE CROSS THREAD**; evidence `ARTICLE`, `WIKI_ARCHIVE`. Every checkpoint/restore/migration event should be lineage-preserving and auditable. - **HR-1371 — `cross_threads` → [[wiki/Personal Authoritative State|Personal Authoritative State]]** — **HIGH VALUE CROSS THREAD**; evidence `ARTICLE`, `WIKI_ARCHIVE`. A continuity system needs an authoritative active/checkpoint state and rules for stale copies.  ## Research Inferences  These entries translate the forward-looking register in [[research/Research Inferences|Research Inferences]] into ordinary wiki prose. The tier labels apply to the inference, not automatically to every factual anchor inside it. The interpretive frame comes from [[articles/Technologies for Consciousness Mapping and Transfer|Technologies for Consciousness Mapping and Transfer]] and [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]]. Collection route: [[collections/Neurotech|Neurotech]]. - **INF-0192 — Strongly indicated.** Large training runs survive hardware failure by checkpointing state to durable storage on a fixed cadence. Checkpoint discipline developed for economic reasons is precisely the discipline a continuity architecture requires, and it is already operationally mature.  ## Research Inference Attractors  These are secondary semantic placements for the inference attractor network. Each statement keeps its original ID and tier; its canonical cluster page links back to every destination. Source register: [[research/Research Inferences|Research Inferences]]. Interpretive context: [[articles/Technologies for Consciousness Mapping and Transfer|Technologies for Consciousness Mapping and Transfer]] and [[articles/Mind Uploading and AI — The Host is Reusable and the Person is the Delta|Mind Uploading and AI — The Host is Reusable and the Person is the Delta]]. Collection route: [[collections/Neurotech|Neurotech]]. - **INF-0228 — Strongly indicated.** DNA storage is read-cheap and write-expensive, which makes it an archival rather than working medium until synthesis throughput improves by several orders of magnitude. Enzymatic synthesis is the technology that would move that number, and it is under active commercial development. - **Canonical cluster:** [[wiki/Deep Time Continuity|Deep Time Continuity]] - **INF-0239 — Strongly indicated.** Distributed, geographically redundant archives with independent governance are the established design for civilizational-scale preservation. Applying the pattern to neural archives is a straightforward transfer of a proven institutional architecture. - **Canonical cluster:** [[wiki/Deep Time Continuity|Deep Time Continuity]] - **INF-0242 — Strongly indicated.** Storing a human connectome at ultrastructural resolution is an exabyte-class commitment per individual, which prices mass preservation at civilizational rather than personal scale. Compression to the causally sufficient residual is what makes per-person archiving economically conceivable. - **Canonical cluster:** [[wiki/Deep Time Continuity|Deep Time Continuity]] - **INF-0243 — Analytic.** The cost of preserving one person's information falls on the same curves that govern all storage, which means the question is not whether it becomes affordable but in which decade. Naming the target cost per residual converts advocacy into a schedule. - **Canonical cluster:** [[wiki/Deep Time Continuity|Deep Time Continuity]]