Singulink.FulcrumFS 0.16.0

FulcrumFS

FulcrumFS is a high-performance file processing pipeline and storage engine that layers on top of any file system, transforming standard directories into transactional file repositories with a two-phase commit system and file variant management.

While it serves as a key component of our upcoming FulcrumDB database engine, it is also designed to function independently, bringing robust file handling to any application or database. FulcrumFS is especially well-suited for managing user-uploaded content such as documents, images and videos, offering strong guarantees around consistency and integrity.

Details of each component are provided below:

Library	Status	Package
Singulink.FulcrumFS	Preview
Singulink.FulcrumFS.Core	Preview
Singulink.FulcrumFS.Images	Preview

Supported Runtimes: .NET 9.0+

Libraries may be in the following states:

• Internal: Source code (and possibly a nuget package) is available but the library is intended for internal use at this time.
• Preview: Library is available for public preview but the APIs may not be fully documented and the API surface is subject to change without notice.
• Public: Library is intended for public use with a fully documented and stable API surface.

You are welcome to use any libraries or code in this repository that you find useful and feedback/contributions are appreciated regardless of library state.

API documentation and additional information is coming soon.

About Singulink

We are a small team of engineers and designers dedicated to building beautiful, functional and well-engineered software solutions. We offer very competitive rates as well as fixed-price contracts and welcome inquiries to discuss any custom development / project support needs you may have.

This package is part of our Singulink Libraries collection. Visit https://github.com/Singulink to see our full list of publicly available libraries and other open-source projects.

Components

FulcrumFS

Main library that enables transactional file storage and processing, providing a foundation for building reliable file repositories on top of any file system.

Features:

✔️ Two-phase commit enables consistency with transactional databases while keeping files decoupled from database storage
✔️ Validate, pre-process, and post-process files during storage and retrieval
✔️ Generate and manage file variants (e.g. alternate formats, resolutions, thumbnails)
✔️ Operates reliably on any file system, including local disks, NAS, and network file systems
✔️ Recovers gracefully from crashes, power failures and disconnected storage volumes
✔️ Scales to millions of files per repository while maintaining good file system performance characteristics
✔️ Provides direct FileStream access for efficient, low-overhead file I/O
✔️ Stored files remain browsable in standard file managers (e.g. File Explorer, Finder)
✔️ Fully compatible with file system features like encryption and compression
✔️ Designed to work seamlessly with existing backup, redundancy, replication, and storage tools

FulcrumFS.Core

Core library that is mostly useful for access to the FileId type and repository paths from projects that do not need the full file processing capabilities of the main FulcrumFS library (e.g. in a client application that needs to convert file IDs received from a service to resulting path).

FulcrumFS.Images

Optional extension that adds customizable image processing capabilities, including validation, thumbnail generation, resizing, format conversion and metadata stripping.

Image processing is provided by the fantastic ImageSharp library.

Further Reading

API documentation and additional usage information is coming soon.