How does copy on write work, and how do clones grow apart? What effect do they have on the use of space and performance?
APFS
Similarities and differences, how to make each in the Finder and Terminal, how much space they use, and how they work in APFS.
After studying thousand of log entries in less than 2 seconds, this is how macOS updates its values for purgeable and available space. But who uses them?
Deleting two large files from a volume triggered the updating of figures for purgeable and available space within 9 seconds. Yet 6 minutes later, the Finder didn’t show those updated figures.
One volume has 60 GB of purgeable space, giving 295 GB available; the other has only 15 GB purgeable, so 250 GB available. How can they be in the same container?
Save space on your storage and backups by removing all copies. But does it work if they’re APFS clone files? And does that housekeeping utility detect clones for you?
Performed by CacheDelete, it first looks at a wide range of macOS caches, and only at the end purges snapshots, to free up space when it runs short.
Good space management doesn’t bring new emoji, but it makes a big difference when the Finder doesn’t give completely inaccurate figures for Available space. A practical demonstration of its gross errors.
Can we trust the figures the Finder provides for used and available space on a volume? What does it count as purgeable?
When the Finder works out how much space is available on disk, what does it count as being “purgeable”? The answer may surprise you.
The Eclectic Light Company 