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However, there may be situations in which a significant portion of a Realm file is comprised of unused space.In order to deal with this, you may set the The compaction operation works by reading the entire contents of the Realm file, rewriting it to a new file at a different location, then replacing the original file.No data is actually written to the files unless the operating system needs to swap to disk due to memory pressure.instance could sometimes fail if resources are constrained.This is a useful option if you need flexible data access without the overhead of disk persistence.
If opening a Realm requires a time-consuming operation, such as applying migrations, compaction or downloading the remote contents of a synchronized Realm, you should use the In some cases, you might not want to open a Realm until it has all remote data available.
Since the auxiliary files can sometimes be lazily created and deleted mid-operation, we recommend that you apply the file protection attributes to the parent folder containing these Realm files.
This will ensure the attribute is properly applied to all of the relevant Realm files, regardless of their creation time. A synchronized Realm uses the Realm Object Server to transparently synchronize its contents with other devices.
Please browse our tv OS examples for sample tv OS apps demonstrating how to use Realm as either an offline cache or with preloaded data.
On i OS 8 and above, files inside apps are automatically encrypted using exception will be thrown.
In order to handle this, it is necessary to ensure that the file protection attributes applied to both the Realm file itself and its auxiliary files is downgraded to a less strict one that allows file access even when the device is locked, such as .