Grand Diomande Research · Full HTML Reader

Migration Architect — Architecture Document

Migration Architect is an AI-powered tool that plans and executes zero-downtime system migrations. It generates migration blueprints from system state, builds dependency graphs, creates rollback strategies at every step, and runs health checks before and after migration.

Protocol and Compute architecture technical paper candidate score 40 .md

Full Public Reader

Migration Architect — Architecture Document

Overview

Migration Architect is an AI-powered tool that plans and executes zero-downtime system
migrations. It generates migration blueprints from system state, builds dependency graphs,
creates rollback strategies at every step, and runs health checks before and after migration.

Core Concepts

1. Blueprint Format

A Migration Blueprint is the atomic unit of planning. It describes:

yaml

blueprint:
  id: "bp-20250602-001"
  name: "Database Schema Migration v3.2"
  version: "1.0"
  created_at: "2025-06-02T22:06:00Z"

  source_state:
    description: "Current system state snapshot"
    components: [...]

  target_state:
    description: "Desired end state"
    components: [...]

  phases:
    - id: "phase-1"
      name: "Pre-migration validation"
      steps: [...]
      rollback: {...}
      health_checks: [...]

    - id: "phase-2"
      name: "Shadow deployment"
      steps: [...]
      rollback: {...}
      health_checks: [...]

  dependency_graph:
    nodes: [...]
    edges: [...]

  rollback_strategy:
    type: "cascading"  # cascading | point-in-time | selective
    checkpoints: [...]

  constraints:
    max_downtime: "0s"
    maintenance_window: null
    canary_percentage: 10

2. Dependency Graph Model

The dependency graph is a Directed Acyclic Graph (DAG) where:

Nodes represent migration steps or components
Edges represent dependencies (must-complete-before relationships)
Weights on edges represent risk scores (0.0–1.0)
Critical path is computed for scheduling

Properties:
- Cycle detection prevents deadlocks
- Topological sort determines execution order
- Parallel execution groups are derived from independent subgraphs
- Each node carries rollback metadata

3. Rollback Protocol

Every migration step has a corresponding rollback action:

ROLLBACK LEVELS:
  Level 0 — Automatic: Triggered by health check failure, no human needed
  Level 1 — Prompted: Anomaly detected, human confirms rollback
  Level 2 — Manual: Complex state, provides rollback instructions

ROLLBACK TYPES:
  Cascading    — Roll back current step + all dependents
  Point-in-time — Restore to a specific checkpoint
  Selective    — Roll back specific steps while preserving others

ROLLBACK PROTOCOL:
  1. Pause all in-flight operations
  2. Verify current state (snapshot)
  3. Execute rollback steps in reverse dependency order
  4. Run post-rollback health checks
  5. Verify system matches pre-migration state
  6. Generate incident report

4. Health Check Framework

Health checks run at three stages:

Stage	Purpose	Failure Action
Pre-migration	Validate system is healthy enough to migrate	Abort migration
Intra-migration	Verify each step succeeded	Rollback current phase
Post-migration	Confirm target state achieved	Full rollback

Check types:
- Connectivity — Can components reach each other?
- Data Integrity — Are checksums valid?
- Performance — Is latency within thresholds?
- Functional — Do key operations still work?
- Capacity — Are resources sufficient?

System Architecture

┌─────────────────────────────────────────────────┐
│                Migration Architect                │
├─────────────┬───────────────┬───────────────────┤
│   Planner   │   Executor    │    Monitor        │
│             │               │                   │
│ • Analyze   │ • Run phases  │ • Health checks   │
│ • Blueprint │ • Parallelize │ • Metrics         │
│ • Dep graph │ • Checkpoint  │ • Alerting        │
│ • Schedule  │ • Rollback    │ • Reporting       │
├─────────────┴───────────────┴───────────────────┤
│              Core Engine                         │
│  • State management  • DAG solver               │
│  • Risk scoring      • Constraint validation    │
├─────────────────────────────────────────────────┤
│              Adapters                            │
│  • Database  • Kubernetes  • Cloud  • Custom    │
└─────────────────────────────────────────────────┘

Execution Flow

1. DISCOVER  → Scan current system state
2. PLAN      → Generate blueprint + dependency graph
3. VALIDATE  → Pre-migration health checks
4. EXECUTE   → Run phases in topological order
   ├─ For each phase:
   │   ├─ Create checkpoint
   │   ├─ Execute steps (parallel where possible)
   │   ├─ Run intra-migration health checks
   │   └─ On failure → rollback to checkpoint
5. VERIFY    → Post-migration health checks
6. REPORT    → Generate migration report

Risk Scoring

Each step receives a composite risk score:

risk = (complexity × 0.3) + (blast_radius × 0.3) + (reversibility_difficulty × 0.2) + (data_sensitivity × 0.2)

Where each factor is 0.0–1.0. Steps with risk > 0.7 require explicit approval.

Zero-Downtime Patterns

The system supports these zero-downtime patterns:

1. Blue-Green — Full parallel environment, atomic switch
2. Canary — Gradual traffic shift with monitoring
3. Rolling — Component-by-component replacement
4. Shadow — Run new version in parallel, compare outputs
5. Expand-Contract — Add new, migrate data, remove old

Promotion Decision

Promote into a technical note or architecture paper with implementation anchors.

Source Anchor

projects/dream-metamorphosis/migration-architect/docs/ARCHITECTURE.md

Detected Structure

Method · Evaluation · Architecture