robojerk
74c7bede5f
- Complete Particle-OS rebranding from uBlue-OS - Professional installation system with standardized paths - Self-initialization system with --init and --reset commands - Enhanced error messages and dependency checking - Comprehensive testing infrastructure - All source scriptlets updated with runtime improvements - Clean codebase with redundant files moved to archive - Complete documentation suite
96 lines
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3.4 KiB
Markdown
96 lines
No EOL
3.4 KiB
Markdown
# ComposeFS Documentation
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## Overview
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ComposeFS is the immutable filesystem backend for Ubuntu uBlue systems. It provides the foundation for atomic, layered system updates similar to OSTree but using squashfs and overlayfs technologies.
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## ComposeFS Alternative Script
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The `composefs-alternative.sh` script provides:
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- **Image Creation**: Create ComposeFS images from directories
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- **Image Mounting**: Mount ComposeFS images for access
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- **Image Management**: List, remove, and manage ComposeFS images
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- **Status Information**: Get system status and image information
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- **Integration API**: Clean interface for other scripts
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## Key Features
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- **Immutable Images**: Squashfs-based immutable filesystem images
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- **Layer Support**: Multiple layers can be combined using overlayfs
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- **Atomic Operations**: All operations are atomic and recoverable
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- **Efficient Storage**: Deduplication and compression for space efficiency
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- **Boot Integration**: Seamless integration with bootloader systems
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## Documentation Files
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### Core Documentation
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- **[composefs-guide.md](composefs-guide.md)** - Comprehensive user guide
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- **[composefs-api.md](composefs-api.md)** - API reference and command documentation
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- **[composefs-architecture.md](composefs-architecture.md)** - Technical architecture details
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### Technical Documentation
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- **[composefs-performance.md](composefs-performance.md)** - Performance considerations and optimization
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- **[composefs-troubleshooting.md](composefs-troubleshooting.md)** - Common issues and solutions
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- **[composefs-migration.md](composefs-migration.md)** - Migration from other filesystem technologies
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## Quick Start
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```bash
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# Create a ComposeFS image
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composefs-alternative.sh create my-image /path/to/source
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# Mount a ComposeFS image
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composefs-alternative.sh mount my-image /mnt/image
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# List all images
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composefs-alternative.sh list-images
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# Get image information
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composefs-alternative.sh info my-image
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# Remove an image
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composefs-alternative.sh remove my-image
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```
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## Integration
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ComposeFS integrates with:
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- **apt-layer.sh**: For layer creation and management
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- **bootloader-integration.sh**: For boot image registration
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- **oci-integration.sh**: For OCI image conversion
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- **ublue-config.sh**: For unified configuration
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## Architecture
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ComposeFS provides:
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- **Squashfs Images**: Compressed, immutable filesystem images
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- **Overlayfs Layers**: Multiple layers combined for final filesystem
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- **Atomic Operations**: All operations are atomic and recoverable
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- **Efficient Storage**: Deduplication and compression
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- **Boot Compatibility**: Compatible with standard bootloader systems
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## Performance Characteristics
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- **Read Performance**: Excellent read performance due to compression
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- **Write Performance**: Immutable by design, changes create new layers
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- **Storage Efficiency**: High compression ratios and deduplication
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- **Boot Performance**: Fast boot times with optimized images
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## Security Features
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- **Immutable Images**: Cannot be modified once created
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- **Integrity Verification**: Optional integrity checking
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- **Atomic Updates**: All-or-nothing update semantics
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- **Rollback Support**: Easy rollback to previous images
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## Development Status
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ComposeFS is production-ready with:
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- ✅ Immutable filesystem support
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- ✅ Layer management
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- ✅ Atomic operations
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- ✅ Boot integration
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- ✅ Performance optimization
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- ✅ Security features
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For more information, see the individual documentation files listed above. |