Command deduplication persistence

If I run the sandbox with persistence turned on, will it persist its command id deduplication cache, or is it only kept in memory? If it’s persisted, I suppose it will “recover” the deduplication state upon restart?

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Spot on, deduplication data is persisted on the sandbox, as well as any other DAML Ledger, to guarantee that command deduplication will continue working across restarts.

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