> Is APFS open source?
> An open source implementation is not available at this time. Apple plans to document and publish the APFS volume format specification.
Source: https://developer.apple.com/library/archive/documentation/Fi...
My theory is that Apple rushed APFS and its implementation isn't in a great shape for the public review. APFS doesn't feel any faster on my SSDs on macOS. I suspect they'll add it in a few years, after a few iterations.
The rollout of APFS was _incredibly_ well done; I don't think there is even a remote comparison to how successful it was. A new file system was rolled out to millions of devices in an automated fashion with very few issues. I don't think anyone else has even considered such a thing. I highly doubt the code is that rough, I can't imagine pulling this off without fairly solid core code in place.
Perhaps it’s just the lawyer reviews holding it up.
A global lock on readdir().
(also, HFS+ and its fsck have always been open-source with OS X)
> > Is APFS open source?
> > An open source implementation is not available at this time. Apple plans to document and publish the APFS volume format specification.
They claim to plan to document it fully later.