OSX Next Mobilebackups Profile

Since Mac TimeMachine has been switched on, MAC disk space has been reduced by a lot, using DU-D1 (disk usage and depth is one) command to view/folder space usage, found a folder using 20G, This folder is. Mobilebackups,linux/unix. The files that begin with are hidden by default.

This folder does not exist if TimeMachine is not turned on.

. The Mobilebackups folder is a local snapshot of TimeMachine, and the local snapshot description for the Apple website is as follows:

Time Machine in OS X Lion and later includes a feature called Local snapshot. When your backup drive is unavailable, this feature retains a copy of the files that you created, altered, or deleted on the built-in disk .

When your regular backup drive is not available, local snapshots can be supplemented with regular time machine backups that are stored on the external disk or time Capsule by creating a local backup on the boot disk.

This feature provides you with "security" when you do not have an external backup disk on hand or when you accidentally delete a file with time Capsule.

When your regular backup drive is restored, time machine copies the local snapshot content from the boot disk to the regular backup drive.

On a Mac laptop, when you open time machine, the local snapshot itself is actively enabled. A daily snapshot is stored every 24 hours, from the time you start or start your computer again.

Same, a weekly snapshot is stored every week. Suppose you want time machine to stop storing local snapshots. Please open time machine preferences and slide the switch to the "off" position. When you open time machine again. The snapshot will be restored.

Does the local snapshot occupy disk space?

Time machine is used to store local snapshots only when there is a large amount of free disk space on the startup disk. This means that you can continue to use available disk space as needed.

free disk space	When the free space on your startup disk is less than 20% of the total free space. Time Machine deletes the snapshot from the earliest snapshot. Then it will delete the newer snapshot as needed, preserving the most recent snapshot until the last one is deleted. If you have more than 20% free drive space later, time machine stops deleting the snapshot.
10到20% free disk space	Assuming that your startup disk has less free space than the total free space of 10% or less than 5 GB. The snapshot is first deleted on the MAC. When the free space is the 10%–20% of the total free space, the task of deleting the snapshot still has a normal priority.
free disk space	Assuming that time machine cannot free enough space to reach a threshold of 10% or 5 GB, Time machine deletes all snapshots (keeping only the most recent snapshot) and stops creating a new snapshot. When free space exceeds this threshold, the system creates a new snapshot and deletes the previous snapshot.

View Available disk space

You can see how much space the local snapshots occupy from the About this computer form.

3. Click on the" Storage "tab to see available and used disk space.

The space occupied by the local snapshot is marked as "backed up."

Note: You may notice inconsistencies in the available spatial data in the disk utility, Finder, and show brief introduction inspectors.

Inconsistent data is a normal phenomenon and can be safely ignored. The disk free space shown in the Finder does not contain a local snapshot, because local snapshots can free up their disk space when needed.

Set TimeMachine to proactively back up snapshots locally

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#关闭自己主动备份 sudo  tmutil disablelocal #开启自己主动备份 sudo  tmutil enablelocal

After you close your active backup. Delete. After Mobilebackups, df-h (display free disk space in human-readable style) looks at the space and adds 20G.

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OSX Next Mobilebackups Profile