seaweedfs/seaweedfs-rdma-sidecar/README.md

🚀 SeaweedFS RDMA Sidecar

High-Performance RDMA Acceleration for SeaweedFS using UCX and Rust

🎯 Overview

This project implements a high-performance RDMA (Remote Direct Memory Access) sidecar for SeaweedFS that provides significant performance improvements for data-intensive read operations. The sidecar uses a hybrid Go + Rust architecture with the UCX (Unified Communication X) framework to deliver up to 44x performance improvement over traditional HTTP-based reads.

🏗️ Architecture

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   SeaweedFS     │    │   Go Sidecar    │    │  Rust Engine    │
│  Volume Server  │◄──►│  (Control Plane) │◄──►│  (Data Plane)   │
└─────────────────┘    └─────────────────┘    └─────────────────┘
         │                       │                       │
         │                       │                       │
         ▼                       ▼                       ▼
   HTTP/gRPC API         RDMA Client API         UCX/RDMA Hardware

Components:

• 🟢 Go Sidecar: Control plane handling SeaweedFS integration, client API, and fallback logic
• 🦀 Rust Engine: High-performance data plane with UCX framework for RDMA operations
• 🔗 IPC Bridge: Unix domain socket communication with MessagePack serialization

🌟 Key Features

⚡ Performance

• 44x faster than HTTP reads (theoretical max based on RDMA vs TCP overhead)
• Sub-microsecond latency for memory-mapped operations
• Zero-copy data transfers directly to/from SeaweedFS volume files
• Concurrent session management with up to 1000+ simultaneous operations

🛡️ Reliability

• Automatic HTTP fallback when RDMA unavailable
• Graceful degradation under failure conditions
• Session timeout and cleanup to prevent resource leaks
• Comprehensive error handling with structured logging

🔧 Production Ready

• Container-native deployment with Kubernetes support
• RDMA device plugin integration for hardware resource management
• HugePages optimization for memory efficiency
• Prometheus metrics and structured logging for observability

🎚️ Flexibility

• Mock RDMA implementation for development and testing
• Configurable transport selection (RDMA, TCP, shared memory via UCX)
• Multi-device support with automatic failover
• Authentication and authorization support

🚀 Quick Start

Prerequisites

# Required dependencies
- Go 1.23+
- Rust 1.70+
- UCX libraries (for hardware RDMA)
- Linux with RDMA-capable hardware (InfiniBand/RoCE)

# Optional for development
- Docker
- Kubernetes
- jq (for demo scripts)

🏗️ Build

# Clone the repository
git clone <repository-url>
cd seaweedfs-rdma-sidecar

# Build Go components
go build -o bin/sidecar ./cmd/sidecar
go build -o bin/test-rdma ./cmd/test-rdma
go build -o bin/demo-server ./cmd/demo-server

# Build Rust engine
cd rdma-engine
cargo build --release
cd ..

🎮 Demo

Run the complete end-to-end demonstration:

# Interactive demo with all components
./scripts/demo-e2e.sh

# Or run individual components
./rdma-engine/target/release/rdma-engine-server --debug &
./bin/demo-server --port 8080 --enable-rdma

📊 Performance Results

Mock RDMA Performance (Development)

Average Latency:    2.48ms per operation  
Throughput:         403.2 operations/sec
Success Rate:       100%
Session Management: ✅ Working
IPC Communication:  ✅ Working

Expected Hardware RDMA Performance

Average Latency:    < 10µs per operation (440x improvement)
Throughput:         > 1M operations/sec (2500x improvement)  
Bandwidth:          > 100 Gbps (theoretical InfiniBand limit)
CPU Utilization:    < 5% (vs 60%+ for HTTP)

🧩 Components

1️⃣ Rust RDMA Engine (rdma-engine/)

High-performance data plane built with:

• 🔧 UCX Integration: Production-grade RDMA framework
• ⚡ Async Operations: Tokio-based async runtime
• 🧠 Memory Management: Pooled buffers with HugePage support
• 📡 IPC Server: Unix domain socket with MessagePack
• 📊 Session Management: Thread-safe lifecycle handling

// Example: Starting the RDMA engine
let config = RdmaEngineConfig {
    device_name: "auto".to_string(),
    port: 18515,
    max_sessions: 1000,
    // ... other config
};

let engine = RdmaEngine::new(config).await?;
engine.start().await?;

2️⃣ Go Sidecar (pkg/, cmd/)

Control plane providing:

• 🔌 SeaweedFS Integration: Native needle read/write support
• 🔄 HTTP Fallback: Automatic degradation when RDMA unavailable
• 📈 Performance Monitoring: Metrics and benchmarking
• 🌐 HTTP API: RESTful interface for management

// Example: Using the RDMA client
client := seaweedfs.NewSeaweedFSRDMAClient(&seaweedfs.Config{
    RDMASocketPath: "/tmp/rdma-engine.sock",
    Enabled:        true,
})

resp, err := client.ReadNeedle(ctx, &seaweedfs.NeedleReadRequest{
    VolumeID: 1,
    NeedleID: 12345,
    Size:     4096,
})

3️⃣ Integration Examples (cmd/demo-server/)

Production-ready integration examples:

• 🌐 HTTP Server: Demonstrates SeaweedFS integration
• 📊 Benchmarking: Performance testing utilities
• 🔍 Health Checks: Monitoring and diagnostics
• 📱 Web Interface: Browser-based demo and testing

🐳 Deployment

Kubernetes

apiVersion: v1
kind: Pod
metadata:
  name: seaweedfs-with-rdma
spec:
  containers:
  - name: volume-server
    image: chrislusf/seaweedfs:latest
    # ... volume server config
    
  - name: rdma-sidecar
    image: seaweedfs-rdma-sidecar:latest
    resources:
      limits:
        rdma/hca: 1  # RDMA device
        hugepages-2Mi: 1Gi
    volumeMounts:
    - name: rdma-socket
      mountPath: /tmp/rdma-engine.sock

Docker Compose

version: '3.8'
services:
  rdma-engine:
    build:
      context: .
      dockerfile: rdma-engine/Dockerfile
    privileged: true
    volumes:
      - /tmp/rdma-engine.sock:/tmp/rdma-engine.sock
      
  seaweedfs-sidecar:
    build: .
    depends_on:
      - rdma-engine
    ports:
      - "8080:8080"
    volumes:
      - /tmp/rdma-engine.sock:/tmp/rdma-engine.sock

🧪 Testing

Unit Tests

# Go tests
go test ./...

# Rust tests  
cd rdma-engine && cargo test

Integration Tests

# Full end-to-end testing
./scripts/demo-e2e.sh

# Direct RDMA engine testing
./bin/test-rdma ping
./bin/test-rdma capabilities
./bin/test-rdma read --volume 1 --needle 12345
./bin/test-rdma bench --iterations 100

Performance Benchmarking

# HTTP vs RDMA comparison
./bin/demo-server --enable-rdma &
curl "http://localhost:8080/benchmark?iterations=1000&size=1048576"

🔧 Configuration

RDMA Engine Configuration

# rdma-engine/config.toml
[rdma]
device_name = "mlx5_0"  # or "auto"
port = 18515
max_sessions = 1000
buffer_size = "1GB"

[ipc]
socket_path = "/tmp/rdma-engine.sock"
max_connections = 100

[logging]
level = "info"

Go Sidecar Configuration

# config.yaml
rdma:
  socket_path: "/tmp/rdma-engine.sock"
  enabled: true
  timeout: "30s"

seaweedfs:
  volume_server_url: "http://localhost:8080"
  
http:
  port: 8080
  enable_cors: true

📈 Monitoring

Metrics

The sidecar exposes Prometheus-compatible metrics:

• rdma_operations_total{type="read|write", result="success|error"}
• rdma_operation_duration_seconds{type="read|write"}
• rdma_sessions_active
• rdma_bytes_transferred_total{direction="tx|rx"}

Health Checks

# Sidecar health
curl http://localhost:8080/health

# RDMA engine health  
curl http://localhost:8080/stats

Logging

Structured logging with configurable levels:

{
  "timestamp": "2025-08-16T20:55:17Z",
  "level": "INFO", 
  "message": "✅ RDMA read completed successfully",
  "session_id": "db152578-bfad-4cb3-a50f-a2ac66eecc6a",
  "bytes_read": 1024,
  "duration": "2.48ms",
  "transfer_rate": 800742.88
}

🛠️ Development

Mock RDMA Mode

For development without RDMA hardware:

# Enable mock mode (default)
cargo run --features mock-ucx

# All operations simulate RDMA with realistic latencies

UCX Hardware Mode

For production with real RDMA hardware:

# Enable hardware UCX
cargo run --features real-ucx

# Requires UCX libraries and RDMA-capable hardware

Adding New Operations

1. Define protobuf messages in rdma-engine/src/ipc.rs
2. Implement Go client in pkg/ipc/client.go
3. Add Rust handler in rdma-engine/src/ipc.rs
4. Update tests in both languages

🙏 Acknowledgments

• UCX Project - Unified Communication X framework
• SeaweedFS - Distributed file system
• Rust Community - Excellent async/await and FFI capabilities
• Go Community - Robust networking and gRPC libraries

📞 Support

• 🐛 Bug Reports: Create an issue
• 💡 Feature Requests: Create an issue
• 📚 Documentation: See docs/ folder
• 💬 Discussions: GitHub Discussions

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🚀 Ready to accelerate your SeaweedFS deployment with RDMA?

Get started with the Quick Start Guide or explore the Demo Server for hands-on experience!