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You can definitely make snapshots on APFS. It also use checksums for filesystem integrity.

• Hackbraten 5y ago
  > You can definitely make snapshots on APFS. Apple can. I can’t. Making APFS snapshots requires special entitlements, which they’re not going to give me. > It also use checksums for filesystem integrity. It doesn’t check integrity of the actual data though. But I care about my data.
  • yehaaa 5y ago
    You can use tmutil to create a snapshot. Or do you want to create an app that performs a snapshot via some API.
    • Hackbraten 5y ago
      One does not simply create an APFS snapshot using tmutil. Using tmutil means Time Machine creates a snapshot for me. It also conveniently earmarks the snapshot for later removal at Time Machine’s own discretion. That’s not what I want. I want to have a say in snapshot retention, not have some tool make the decision for me. Specifically, I need precise control over snapshot retention so I can maintain several off-site replicas of my backup.
  • CharlesW 5y ago
    > Apple can. I can’t. Making APFS snapshots requires special entitlements, which they’re not going to give me. What makes you think that? Carbon Copy Cloner does this, and is made by a small independent developer. https://bombich.com/kb/ccc6/leveraging-snapshots-on-apfs-volumes https://bombich.com/kb/ccc6/leveraging-snapshots-on-apfs-vol...
    • Hackbraten 5y ago
      They have managed to obtain the special entitlement. Source: https://bombich.com/blog/2018/03/30/building-better-backups-carbon-copy-cloner https://bombich.com/blog/2018/03/30/building-better-backups-... They’re one of two apps in the world who have been granted the entitlement as far as I know. The other one is Time Machine.
• EricE 5y ago
  APFS does NOT checksum the same as ZFS. APFS relies on the SSD controller to checksum/safeguard data. Which is fine so long as all your data is on SSD :p