Apple File System High Sierra

The secret about APFS Apple’s new file system

In the new macOS 10.13 High Sierra release due in late 2017 Apple are introducing a new file system – APFS.

The secret about APFS Apple’s new file system

The file system is an important part of any operating system – it’s where we keep our stuff. The organisation of the file system plays an important role in helping the us find files. The organisation also makes it easier for apps and the system itself to find and access the resources they need.

APFS has a Container/Volume/Namespace structure somewhat like a volume manager (and a lot like CoreStorage…)

The file systems in macOS and iOS handle the persistent storage of data files, apps, and the files associated with the operating system itself. Therefore, the file system is one of the fundamental resources used by all processes.

The macOS file system is designed for Macintosh computers, where both users and software have access to the file system. Users access the file system directly through the Finder, which presents a user-oriented view of the file system by hiding or renaming some files and directories. Apps access the file system using the system interfaces, which show the complete file system precisely as it appears on disk

These days we store hundreds of gigabytes and access millions of files on high-speed, low-latency flash drives. We carry our data with us and we demand that sensitive information be secure. Apple File System is a new, modern file system for iOS, macOS, tvOS, and watchOS. It is optimised for Flash/SSD storage and features strong encryption, copy-on-write metadata, space sharing, cloning for files and directories, snapshots, fast directory sizing, atomic safe-save primitives, and improved file system fundamentals.

Apple File System is uniquely designed to meet the needs of Apple’s products and ecosystem. Apple File System provides strong encryption, ultra-low latencies and limited memory overhead. It is optimized for Flash/SSD storage and can be used on everything from an Apple Watch to a Mac Pro.
HFS+ and its predecessor HFS are more than 30 years old. These file systems were developed in an era of floppy disks and spinning hard drives, when file sizes were calculated in kilobytes or megabytes.

APFS replaces HFS+ as the default file system for iOS 10.3 and later, and macOS 10.13 and later.


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