littlefs-project

Funding Links: https://github.com/sponsors/littlefs-project

Name: littlefs-project
Kind: organization
Followers: 91
Following: 0
Total stars: 5413
Repositories count: 6
Created at: 2022-11-15T18:11:23.024Z
Updated at: 2025-03-25T22:37:57.077Z
Last synced at: 2025-03-25T22:37:57.077Z

GitHub Sponsors Profile

LittleFS is an open-source, community driven project, designed and maintained by Christopher Haster (@geky).
LittleFS is by no means a finished project. There are a number of open challenges, mostly around performance and scalability, which require time to explore, solve, implement, and test.
This is my current roadmap, though it is highly susceptible to change:

Explore a better metadata data-structure (self-balancing Dhara trees)

Reduce metadata compaction O(n^2) -> O(n log(n))
Enable different integer sizes

Explore a better file data-structure (traditional B-trees)

Allow efficient random file writes
Allow logging-friendly APIs
Allow better block utilization for very large blocks
Allow data checksumming

Explore more robust alternatives to the dir-tree's threaded linked-list

The threaded linked-list has been a large source of bugs and should go

A global checksum system

Prevent "rollback" failure mode on checksum failures
Allow external storage of a global checksum for additional protection

Metadata redundancy

Prevent metastability issues on powerloss
Allow optional metadata error-correction at the block level

Garbage-collection APIs

Allow users to control when expensive garbage collection occurs

Optional block free-list

Allow more efficient block allocation
Allow tracking of bad blocks to avoid reuse

Data redundancy

Allow optional data error-correction at the block level

Different integer sizes

16-bit mode => potential RAM/code savings for 16-bit devices/small storage
64-bit mode => >2 GiB files, etc

Donations allow me to dedicate more of my time to LittleFS, which is split between ongoing maintenance and this long-term roadmap. These are strictly donations, no work is guaranteed, but help in making the development of LittleFS sustainable is always appreciated.
If you would like to help a different way or have other requests, feel free to reach me at geky at geky.net.