ProjFS + Copy-on-Write

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
20/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Stale
Tech stack
csharp
Domain
operating-systems

Research direction

Start with the ProjFS PrjWriteFileData entry point and the linked ReFS block-cloning documentation. Determine whether block cloning can be used for projected files, and document whether the API supports sharing large binary assets for the described experimental version-control use case.

Written by the indexing model from the issue text.

Description

Microsoft DevDrive supports copy-on-write semantics which is super cool. I'd like combine ProjFS + CoW so that large binary assets can be shared.

Currently the way ProjFS works is you call PrjWriteFileData. What I'd like to do instead is perform a block clone.

Is there any way to do this today? I believe the answer is no. But I wanted to check.

In case it helps, my intended use case is an experimental version control system. I'd like to support monorepos with very large files which are deduplicated via block cloning.

Thanks!

Dominant language
C#
Stars
174
Forks
40
No merged PRs in 30d

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