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App backup deduplication research #566
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Some info how the system is preparing app data for backup:
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Haven't noticed non-determinism even though files don't get explicitly sorted. |
The research outcome is now documented at https://github.com/seedvault-app/seedvault/tree/android15/doc and was implemented in #750 |
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Currently, Seedvault stores all app data as it receives it by the system: one large block per app. Seedvault's storage encryption was developed in collaboration with the developers of well known backup tools as well as security researchers. It uses clever tricks to deduplicate data and allow restore of several backup snapshots while only storing the data once. In this ticket, we want to research how a similar concept could be applied to app backups as well.
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