A high-performance, distributed, network-replicated storage system built in Rust. GalleonFS provides enterprise-grade volume management with advanced features like snapshots, backup/recovery, migration, and comprehensive monitoring.

• Block-level storage with configurable block sizes
• Distributed replication with synchronous and asynchronous modes
• Write-ahead journaling for crash consistency and recovery
• Checksum verification for data integrity
• Multiple storage classes with different performance profiles

• Dynamic volume provisioning with storage class selection
• Volume lifecycle management (create, expand, clone, delete)
• Multiple access modes (ReadWriteOnce, ReadOnlyMany, ReadWriteMany)
• Volume snapshots with point-in-time recovery
• Online volume expansion and cloning

• Multiple backup strategies (Full, Incremental, Differential)
• Automated backup scheduling with retention policies
• Point-in-time recovery from backups or snapshots
• Application-consistent backups with pre/post hooks
• Cross-region backup support for disaster recovery

• Real-time metrics (IOPS, throughput, latency, queue depth)
• Quality of Service (QoS) policies with limits and guarantees
• Burstable performance for handling traffic spikes
• Performance profiling and bottleneck identification
• Cache hit rate tracking and optimization

• Encryption at rest with AES-256-GCM
• Multiple key management options (Internal, External, HSM)
• Access control policies with fine-grained permissions
• Audit logging for all storage operations
• Multi-tenant isolation with namespace protection

• Live migration between storage classes and nodes
• Storage pools for resource grouping and isolation
• Custom storage drivers with extensible plugin architecture
• Geo-replication for multi-region deployments
• Comprehensive monitoring with Prometheus integration

# Clone the repository
git clone https://github.com/your-org/galleonfs.git
cd galleonfs

# Build the project
cargo build --release

# Run with default configuration
./target/release/galleonfs

# Start GalleonFS with demo mode to see all features
./target/release/galleonfs --demo-mode --setup-defaults

# Start with custom configuration
./target/release/galleonfs \
  --replication-strategy synchronous \
  --persistence-level high \
  --storage-path /var/lib/galleonfs \
  --bind-address 0.0.0.0:8080

GalleonFS uses a layered architecture with the following components:

┌─────────────────────────────────────────────────────────┐
│                    Application Layer                    │
├─────────────────────────────────────────────────────────┤
│                  GalleonFS API Layer                    │
├─────────────────────────────────────────────────────────┤
│  Volume Mgmt │  Backup Ctrl │  Migration │  Monitoring  │
├─────────────────────────────────────────────────────────┤
│             Storage Engine & Replication                │
├─────────────────────────────────────────────────────────┤
│        Physical Storage (Local, Network, Cloud)         │
└─────────────────────────────────────────────────────────┘

• Storage Engine: Handles block-level operations, journaling, and consistency
• Volume Manager: Manages volume lifecycle and metadata
• Replication Service: Provides data redundancy across nodes
• Backup Controller: Orchestrates backup and recovery operations
• Migration Service: Handles live volume migrations
• QoS Manager: Enforces performance policies and resource limits

GalleonFS supports multiple storage classes for different performance requirements:

// Fast local SSD storage
let fast_ssd = StorageClass {
    name: "fast-local-ssd".to_string(),
    provisioner: "galleonfs.io/local-ssd".to_string(),
    parameters: {
        "disk_type" => "ssd",
        "fs_type" => "ext4", 
        "encryption" => "false"
    },
    reclaim_policy: ReclaimPolicy::Delete,
    volume_binding_mode: VolumeBindingMode::Immediate,
};

// Encrypted distributed storage
let encrypted_storage = StorageClass {
    name: "encrypted-storage".to_string(), 
    provisioner: "galleonfs.io/distributed".to_string(),
    parameters: {
        "encryption" => "true",
        "encryption_algorithm" => "AES-256-GCM",
        "replication" => "3"
    },
    reclaim_policy: ReclaimPolicy::Retain,
    volume_binding_mode: VolumeBindingMode::WaitForFirstConsumer,
};

Configure automated backup schedules with retention:

let backup_policy = BackupPolicy {
    name: "daily-incremental".to_string(),
    schedule: "0 2 * * *".to_string(), // Daily at 2 AM
    retention: BackupRetention {
        daily: 7,
        weekly: 4, 
        monthly: 3
    },
    strategy: BackupStrategy::Incremental,
    consistency: ConsistencyLevel::Application,
};

Define performance limits and guarantees:

let qos_policy = QoSPolicy {
    name: "database-qos".to_string(),
    limits: QoSLimits {
        iops: Some(1000),
        throughput_mbps: Some(100),
        latency_ms: Some(10)
    },
    guarantees: QoSGuarantees {
        iops: Some(500),
        throughput_mbps: Some(50)
    },
    burstable: Some(BurstableQoS {
        enabled: true,
        duration_seconds: 300, // 5 minutes
        iops_multiplier: 2.0,
        throughput_multiplier: 2.0
    })
};

GalleonFS provides a production-ready volume mounting system that allows each volume to be individually mounted at separate paths, enabling applications to access volume data through standard filesystem operations.

Each volume can be mounted at its own path:

# Start GalleonFS with mount capabilities
./galleonfs --mount-point /mnt/galleonfs

# Each volume appears as a separate mount point
/mnt/galleonfs/
├── web-server/          # Individual volume mount point
│   ├── data            # Volume data file
│   ├── README.txt      # Volume information
│   └── .galleonfs_metadata
├── database/           # Another volume mount point
│   ├── data
│   ├── README.txt
│   └── .galleonfs_metadata
└── cache/              # Third volume mount point
    ├── data
    ├── README.txt
    └── .galleonfs_metadata

Once mounted, applications can use standard filesystem operations:

# Write data to a volume
echo "Hello GalleonFS!" > /mnt/galleonfs/web-server/data

# Read data from a volume  
cat /mnt/galleonfs/database/data

# Copy files to volumes
cp myapp.conf /mnt/galleonfs/web-server/data

# Stream large data
dd if=large-file.bin of=/mnt/galleonfs/database/data bs=1M

use galleonfs::volume_mount::{VolumeMountManager, GalleonVolumeFile};
use std::path::PathBuf;

// Create mount manager
let mount_manager = galleonfs.create_mount_manager();

// Mount a volume at a specific path
let mount_id = mount_manager.mount_volume(
    volume_id,
    PathBuf::from("/app/data"),
    vec!["rw".to_string(), "sync".to_string()]
).await?;

// Open volume file for operations
let mut volume_file = mount_manager
    .open_volume_file(&PathBuf::from("/app/data"))
    .await?;

// Read/write data directly
let mut buffer = vec![0; 1024];
let bytes_read = volume_file.read(&mut buffer).await?;
volume_file.write(b"application data").await?;
volume_file.seek(std::io::SeekFrom::Start(0))?;

// Unmount when done
mount_manager.unmount_volume(mount_id).await?;

The same volume can be mounted multiple times for shared access:

// Mount volume for primary application (read-write)
let primary_mount = mount_manager.mount_volume(
    volume_id,
    PathBuf::from("/app/primary"),
    vec!["rw".to_string()]
).await?;

// Mount same volume read-only for monitoring
let readonly_mount = mount_manager.mount_volume(
    volume_id,
    PathBuf::from("/app/readonly"), 
    vec!["ro".to_string()]
).await?;

// List all mounts
let active_mounts = mount_manager.list_mounts().await;
for mount in active_mounts {
    println!("Volume {} mounted at {}", 
             mount.volume_id, mount.mount_point.display());
}

use galleonfs::{GalleonFS, VolumeType, WriteConcern};

// Create a new volume
let volume = galleonfs.create_volume(
    VolumeType::Persistent,
    1024 * 1024 * 1024, // 1GB
    "fast-local-ssd".to_string()
).await?;

// Write data with durability guarantee  
galleonfs.write_block(
    volume.id,
    0, // block_id
    b"Hello, GalleonFS!",
    WriteConcern::WriteDurable
).await?;

// Read data back
let data = galleonfs.read_block(volume.id, 0).await?;

// Create a snapshot
let snapshot = galleonfs.create_snapshot(
    volume.id,
    "backup-before-upgrade"
).await?;

// Clone the volume
let cloned_volume = galleonfs.clone_volume(
    volume.id,
    "development-copy"  
).await?;

// Get real-time metrics
let metrics = galleonfs.get_volume_metrics(volume.id).await?;
println!("IOPS: {:.2}, Throughput: {:.2} MB/s, Latency: {:.2} ms",
    metrics.iops, metrics.throughput_mbps, metrics.latency_ms);

// Check volume usage
let usage = galleonfs.get_volume_usage(volume.id).await?;
println!("Volume usage: {} bytes", usage);

// List all volumes
let volumes = galleonfs.list_volumes().await?;
for vol in volumes {
    println!("Volume: {} ({}), State: {:?}, Size: {} bytes",
        vol.name, vol.id, vol.state, vol.size_bytes);
}

GalleonFS provides different write concern levels for balancing performance vs durability:

• WriteAcknowledged: Fastest, acknowledged after primary write
• WriteDurable: Medium, acknowledged after flush to disk
• WriteReplicated: Slower, acknowledged after replication to 1+ nodes
• WriteDistributed: Slowest, acknowledged after cross-zone replication

• Synchronous: Real-time replication with strong consistency
• Asynchronous: Background replication with eventual consistency

• Basic: Local storage, protects against process failures
• Enhanced: Local RAID, protects against disk failures
• High: Distributed, protects against node failures
• Maximum: Geo-replicated, protects against datacenter failures

# Install Rust (if not already installed)
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

# Clone and build
git clone https://github.com/OmniCloudOrg/galleonfs
cd galleonfs
cargo build --release

# Run tests
cargo test

# Generate documentation
cargo doc --open

galleonfs/
├── src/
│   ├── lib.rs           # Core types and GalleonFS struct
│   ├── storage.rs       # Storage engine implementation
│   ├── volume.rs        # Volume management  
│   ├── volume_mount.rs  # Volume mounting system
│   ├── snapshot.rs      # Snapshot operations
│   ├── backup.rs        # Backup and recovery
│   ├── migration.rs     # Volume migration
│   ├── replication.rs   # Data replication
│   ├── monitoring.rs    # Performance monitoring
│   ├── security.rs      # Encryption and access control
│   ├── qos.rs          # Quality of Service policies
│   ├── fuse_fs.rs      # FUSE filesystem (Linux/macOS)
│   ├── virtual_fs.rs   # Virtual filesystem (Windows)
│   └── main.rs         # CLI application
├── tests/
│   └── integration_tests.rs
├── Cargo.toml
└── README.md

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Make your changes and add tests
4. Ensure all tests pass (cargo test)
5. Commit your changes (git commit -m 'Add amazing feature')
6. Push to the branch (git push origin feature/amazing-feature)
7. Open a Pull Request

GalleonFS includes comprehensive integration tests:

# Run all tests
cargo test

# Run specific test module  
cargo test --test integration_tests

# Run tests with output
cargo test -- --nocapture

# Run demo mode for manual testing
cargo run -- --demo-mode --setup-defaults

GalleonFS exposes metrics compatible with Prometheus:

• Volume-level metrics (IOPS, throughput, latency)
• System-level metrics (capacity, errors, performance)
• Replication metrics (lag, throughput, errors)
• Backup metrics (success rate, duration, size)

Structured logging with configurable levels:

# Set log level
RUST_LOG=info ./target/release/galleonfs

# Debug logging for troubleshooting  
RUST_LOG=debug ./target/release/galleonfs

# Basic single-node setup
./galleonfs --storage-path /var/lib/galleonfs --bind-address 127.0.0.1:8080

# Node 1 (primary)
./galleonfs --bind-address 10.0.1.10:8080 --peer-addresses 10.0.1.11:8080,10.0.1.12:8080

# Node 2 
./galleonfs --bind-address 10.0.1.11:8080 --peer-addresses 10.0.1.10:8080,10.0.1.12:8080

# Node 3
./galleonfs --bind-address 10.0.1.12:8080 --peer-addresses 10.0.1.10:8080,10.0.1.11:8080  

• ✅ Core storage engine with journaling
• ✅ Volume management and snapshots
• ✅ Backup/recovery system
• ✅ Performance monitoring
• ✅ Basic replication
• ✅ Encryption at rest

• 🔄 REST API for external integration
• 🔄 Web-based management interface
• 🔄 Advanced QoS policies
• 🔄 Compression and deduplication
• 🔄 S3-compatible object storage

• 📋 Multi-datacenter replication
• 📋 Advanced analytics and ML-based optimization
• 📋 Disaster recovery automation
• 📋 Fine-grained access controls
• 📋 Enterprise directory integration
• 📋 Compliance reporting tools

Licensed under the MIT License. See LICENSE for details.

GalleonFS - Built for performance, designed for scale, engineered for reliability.