CopyOnWrite (CoW) in Rust

Status

OS	File System	Status
Linux	btrfs
Linux	xfs
Windows	ReFS
MacOS	APFS

Note: Linux and Windows tests run in Google Cloud VMs to ensure the correct file system is used. MacOS tests run only GitHub Actions.

Description

This project is an implementation of Copy-On-Write (CoW) or reflinks in Rust. It provides file copy functionalities that are optimized for different file systems and operating systems.

Features

• Unix/MacOS: Uses the reflink-copy crate for CoW support.
• Windows: Native implementation supporting ReFS drives (Windows Server 2016+ and Windows 11 Dev Drives).

Usage Demo

Here's a simple demo showing how to use this library.

use copy_on_write::reflink_file_sync;

reflink_file_sync(src, dst);