Module delta 

Distributed delta mode (multi-node coordination).

Delta: Distributed Coordination for LaminarDB

This module implements multi-node distribution for LaminarDB, extending the single-process engine with gossip discovery, Raft metadata consensus, epoch-fenced partition ownership, distributed checkpointing, and gRPC inter-node RPC.

Architecture

┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│   Node A     │◄──►│   Node B     │◄──►│   Node C     │
│  (Leader)    │    │  (Follower)  │    │  (Follower)  │
└──────┬───────┘    └──────┬───────┘    └──────┬───────┘
       │                   │                   │
  ┌────▼────┐         ┌────▼────┐         ┌────▼────┐
  │ Raft    │         │ Raft    │         │ Raft    │
  │ (meta)  │         │ (meta)  │         │ (meta)  │
  └────┬────┘         └────┬────┘         └────┬────┘
       │                   │                   │
  ┌────▼────┐         ┌────▼────┐         ┌────▼────┐
  │Partition│         │Partition│         │Partition│
  │ Guards  │         │ Guards  │         │ Guards  │
  └─────────┘         └─────────┘         └─────────┘

Modules

• discovery: Node discovery (static seeds, gossip, Kafka groups)
• coordination: Raft-based metadata consensus
• partition: Epoch-fenced partition ownership and migration
• checkpoint: Distributed checkpoint coordination
• rpc: gRPC services for inter-node communication

Modules

checkpoint

Distributed checkpoint coordination.

coordination

Raft-based metadata consensus and coordination.

discovery

Node discovery and membership.

partition

Epoch-fenced partition ownership, assignment, and migration.