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WASM Edge Computing: Edge Architecture

WASM Edge Computing: Edge Architecture

Part of: WASM Edge Computing User Guide

Global Network: 50+ Locations, 6 Continents

North America (10 locations)

Region::UsEast1        // Virginia (39.0, -77.5)
Region::UsEast2        // Ohio (40.0, -83.0)
Region::UsWest1        // California (37.4, -122.1)
Region::UsWest2        // Oregon (45.6, -122.6)
Region::UsCentral      // Iowa (41.3, -95.9)
Region::CanadaCentral  // Toronto (43.7, -79.4)
Region::CanadaEast     // Montreal (45.5, -73.6)
Region::UsaSoutheast   // Atlanta (33.7, -84.4)
Region::UsaNorthwest   // Seattle (47.6, -122.3)
Region::MexicoCentral  // Mexico City (19.4, -99.1)

Europe (10 locations)

Region::EuWest1            // Ireland (53.4, -6.3)
Region::EuWest2            // London (51.5, -0.1)
Region::EuCentral1         // Frankfurt (50.1, 8.7)
Region::EuNorth1           // Stockholm (59.3, 18.1)
Region::FranceCentral      // Paris (48.9, 2.4)
Region::GermanyCentral     // Frankfurt (50.1, 8.7)
Region::ItalyCentral       // Milan (41.9, 12.5)
Region::SpainCentral       // Madrid (40.4, -3.7)
Region::NetherlandsCentral // Amsterdam (52.4, 4.9)

Asia-Pacific (10 locations)

Region::ApSoutheast1       // Singapore (1.3, 103.8)
Region::ApSoutheast2       // Sydney (-33.9, 151.2)
Region::ApNortheast1       // Tokyo (35.7, 139.7)
Region::ApNortheast2       // Seoul (37.6, 126.9)
Region::ApSouth1           // Mumbai (19.1, 72.9)
Region::JapanEast          // Tokyo (35.7, 139.7)
Region::SouthKoreaEast     // Seoul (37.6, 126.9)
Region::IndiaCentral       // Mumbai (19.1, 72.9)
Region::SingaporeCentral   // Singapore (1.3, 103.8)

South America (5 locations)

Region::SaBrazilSouth   // São Paulo (-23.6, -46.7)
Region::SaBrazilEast    // Salvador (-12.9, -38.5)
Region::SaArgentina     // Buenos Aires (-34.6, -58.4)
Region::SaChile         // Santiago (-33.5, -70.6)
Region::SaColombia      // Bogotá (4.7, -74.1)

Middle East (5 locations)

Region::MeBahrain      // Manama (26.2, 50.6)
Region::MeUae          // Dubai (25.3, 55.3)
Region::MeSaudiArabia  // Riyadh (24.7, 46.7)
Region::MeIsrael       // Tel Aviv (32.1, 34.8)
Region::MeTurkey       // Istanbul (41.0, 28.9)

Africa (5 locations)

Region::AfSouthAfrica  // Cape Town (-33.9, 18.4)
Region::AfNigeria      // Lagos (6.5, 3.4)
Region::AfEgypt        // Cairo (30.0, 31.2)
Region::AfKenya        // Nairobi (-1.3, 36.8)
Region::AfMorocco      // Casablanca (33.6, -7.6)

Edge Node Architecture

┌──────────────────────────────────────────────────────┐
│              Client Request (User in Tokyo)           │
└──────────────────────────┬───────────────────────────┘
                          │
                          ▼
          ┌────────────────────────────────┐
          │    Geographic Router (DNS)      │
          │  ✓ Haversine distance calc      │
          │  ✓ Health check verification    │
          │  ✓ Capacity load balancing      │
          └────────┬───────────────────────┘
                  │ Route to nearest healthy node
                  ▼
    ┌─────────────────────────────────────────┐
    │   Edge Node: ap-northeast-1 (Tokyo)     │
    │                                         │
    │  ┌────────────────────────────────┐    │
    │  │   L1 Cache (Memory - 1ms)      │    │
    │  │   512MB, LRU eviction          │    │
    │  │   Hit rate: 95%                │    │
    │  └──────────┬─────────────────────┘    │
    │            │ Miss                      │
    │            ▼                           │
    │  ┌────────────────────────────────┐    │
    │  │   L2 Cache (SSD - 10ms)        │    │
    │  │   10GB, access-frequency LRU   │    │
    │  │   Hit rate: 85%                │    │
    │  └──────────┬─────────────────────┘    │
    │            │ Miss                      │
    │            ▼                           │
    │  ┌────────────────────────────────┐    │
    │  │   L3 Cache (Cloud - 50ms)      │    │
    │  │   100GB, regional               │    │
    │  │   Hit rate: 60%                │    │
    │  └──────────┬─────────────────────┘    │
    │            │ Miss                      │
    └────────────┼─────────────────────────┘
                │
                ▼
    ┌─────────────────────────────────────────┐
    │      Primary Database (Central)          │
    │      Authoritative source of truth       │
    └─────────────────────────────────────────┘
                │
                │ CRDT Sync (<100ms)
                ▼
    ┌─────────────────────────────────────────┐
    │  All Edge Nodes (Eventually Consistent)  │
    │  Vector clock conflict resolution        │
    └─────────────────────────────────────────┘

Component Stack

// Edge node component hierarchy
EdgeNode {
    id: String,
    region: Region,


    // Runtime
    wasm_runtime: WasmRuntime,


    // Multi-tier cache
    l1_cache: L1Cache,      // Memory: 1ms, 512MB
    l2_cache: L2Cache,      // SSD: 10ms, 10GB
    l3_cache: L3Cache,      // Cloud: 50ms, 100GB


    // State sync
    synchronizer: EdgeStateSynchronizer,
    vector_clock: VectorClock,


    // Health & metrics
    health_status: HealthStatus,
    latency_p50: Duration,
    latency_p99: Duration,
    error_rate: f64,


    // Capacity management
    capacity: usize,
    current_load: usize,
    auto_scaler: AutoScaler,
}