They do plan to document it fully later: > 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…
What makes you think it’s a rush job? Perhaps it’s just the lawyer reviews holding it up.
They do plan to document it fully later: > 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…
> My theory is that Apple rushed APFS and its implementation isn't in a great shape for the public review. 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 th…
Agreed. For iOS, the rollout was so smooth that most people weren't even aware it was taking place, with the only observable effect being that the iOS upgrade took a bit longer than usual. For the macOS rollout, there were more hiccups, but still, extremely smooth. In fact, I just had to launch Disk Utility to double-check that this computer was in fact migrated to APFS because I couldn't recall actually seeing anything specific about it (as this computer has a fusion drive, as well as a Bootcamp partition).
> My theory is that Apple rushed APFS and its implementation isn't in a great shape for the public review. 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 th…
Agreed. For iOS, the rollout was so smooth that most people weren't even aware it was taking place, with the only observable effect being that the iOS upgrade took a bit longer than usual. For the macOS rollout, there were more hiccups, but still, extremely smooth. In fact, I just had to launch Disk Utility to double-check that this computer was in fact migrated to APFS because I couldn't recall actually seeing anyth…
Mojave update trashed my Fusion Drive to the extent that plugging any other mac into my imac in target disk mode made the host mac instantly kernel panic. And I lost all my files obv.
I wonder if this is why recent versions of macOS performs so poorly on old HDD-based MacBooks. The difference between my work's 2012 MacBook (HDD) and my personal 2015 (SSD) MacBook is like night and day. Most apps open in a second on my SSD MacBook yet take up to a minute to open on my employer's HDD MacBook. It's not just this MacBook, I also see the same on a work iMac as well. Such a shame as these older machines previously didn't run so slowly.
I wonder if this is why recent versions of macOS performs so poorly on old HDD-based MacBooks. The difference between my work's 2012 MacBook (HDD) and my personal 2015 (SSD) MacBook is like night and day. Most apps open in a second on my SSD MacBook yet take up to a minute to open on my employer's HDD MacBook. It's not just this MacBook, I also see the same on a work iMac as well. Such a shame as these older machines…
2015 was the year that Apple moved to NVMe SSDs, so they are bound to feel much more snappy than spinning rust disks, regardless of the file system involved.
I wonder if this is why recent versions of macOS performs so poorly on old HDD-based MacBooks. The difference between my work's 2012 MacBook (HDD) and my personal 2015 (SSD) MacBook is like night and day. Most apps open in a second on my SSD MacBook yet take up to a minute to open on my employer's HDD MacBook. It's not just this MacBook, I also see the same on a work iMac as well. Such a shame as these older machines…
Replacing an HDD with an SSD really is a night-and-day kind of difference for any laptop I've ever seen, regardless of the OS or filesystem.
IMO, that's likely to be a much bigger factor than the filesystem.
Agreed. For iOS, the rollout was so smooth that most people weren't even aware it was taking place, with the only observable effect being that the iOS upgrade took a bit longer than usual. For the macOS rollout, there were more hiccups, but still, extremely smooth. In fact, I just had to launch Disk Utility to double-check that this computer was in fact migrated to APFS because I couldn't recall actually seeing anyth…
Mojave update trashed my Fusion Drive to the extent that plugging any other mac into my imac in target disk mode made the host mac instantly kernel panic. And I lost all my files obv.
They do plan to document it fully later: > 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…
What makes you think it’s a rush job? Perhaps it’s just the lawyer reviews holding it up.
My personal guess is that they wanted to release the printed spec before they released the code. The spec has now been released, the 10.14 source has not, maybe apfs.kext will be in the 10.14 source drop.
(also, HFS+ and its fsck have always been open-source with OS X)
I wonder if this is why recent versions of macOS performs so poorly on old HDD-based MacBooks. The difference between my work's 2012 MacBook (HDD) and my personal 2015 (SSD) MacBook is like night and day. Most apps open in a second on my SSD MacBook yet take up to a minute to open on my employer's HDD MacBook. It's not just this MacBook, I also see the same on a work iMac as well. Such a shame as these older machines…
Replacing an HDD with an SSD really is a night-and-day kind of difference for any laptop I've ever seen, regardless of the OS or filesystem. IMO, that's likely to be a much bigger factor than the filesystem.
Unfortunately not the biggest one though. I too have a old 2012 macbook pro with hdd. While it was flying under snow leopard it now grinds to a halt every time i open any app or document. Already ordered an ssd but still dreaming of downgrading it back to snow leopard.
That's missing a good chunk of the interesting stuff related to how users interact with the os though. (app and framework source code)
Yeah, apps and frameworks aren't part of the kernel. But APFS is.
It's loaded into the kernel, but it's a kext (kernel extension) rather than being part of the xnu source tree itself. Only a subset of kexts are open source. (By comparison, HFS used to be in the xnu tree, but it was moved into a kext as well a few years back; that one is open source.)