iOS 10.3 & APFS: Θα αντικαταστήσει τα HFS και HFS+

Χθες σας ενημερώσαμε για μία ακόμη νέα προσθήκη του iOS 10.3 που αφορά την νέα δυνατότητα βαθμολόγησης μιας εφαρμογής, καθώς και για τη δυνατότητα απάντησης από την πλευρά του προγραμματιστή. Το νέο λειτουργικό θα αλλάξει πολλά και ένα από αυτά θα είναι το νέο file system που σχεδίασε η Apple, το οποίο θα αντικαταστήσει τα υπάρχοντα HFS και HFS+(!) Δείτε παρακάτω τα χαρακτηριστικά του APFS:

APFS File System Features

– Flash / SSD Optimization
APFS is optimized for Flash/SSD storage and can be used with traditional hard disk drives (HDD). A unique copy-on-write design uses I/O coalescing to maximize performance while ensuring data reliability.

– Space Sharing
Space Sharing allows multiple file systems to share the same underlying free space on a physical volume. Unlike rigid partitioning schemes, which pre-allocate a fixed amount of space for each file system, APFS volumes can grow and shrink without volume repartitioning.

Each volume in an APFS container reports the same available disk space, which is equal to the total available disk space of the container. For example, for an APFS container with a capacity of 100GB that contains volume A, which uses 10GB, and volume B, which uses 20GB, the free space reported for both volumes A and B is 70GB (100GB – 10GB – 20GB).

– Cloning of Files and Directories
A clone is a nearly instantaneous copy of a file or directory that occupies no additional space for file data. When a cloned file is modified, only the modified blocks are written to new locations on storage. In this way, the file system can store multiple revisions of the same document with less storage space.

– Snapshots
A snapshot is a read-only instance of a file system on a volume. The operating system can use snapshots to make backups work more efficiently, and offer a way to revert changes to a given point in time.

– Fast Directory Sizing
Fast Directory Sizing allows APFS to quickly compute the total space used by a directory hierarchy, and update it as the hierarchy evolves.

– Atomic Safe-Save
Apple File System introduces a new Atomic Safe-Save primitive for bundles and directories. Atomic Safe-Save performs renames in a single transaction such that, from the user’s perspective, the operation either all happens or does not happen at all.

Το APFS υποστηρίζει όλα τα λειτουργικά σύστηματα της εταιρείας – iOS, macOS, tvOS & watchOS -, είναι βελτιστοποιημένο για χρήση με Flash/SSD μέσα αποθήκευσης, προσφέρει ιδιαίτερες δυνατότητες κρυπτογράφησης, ενώ όπως αυτό γίνεται κατανοητό, αν αναβαθμίσετε στο iOS 10.3, δεν θα μπορείτε να κάνετε downgrade λόγω της αλλαγής του file system σε APFS.

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