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### Instruction:
How does SysDB help achieve high availability in IOS XR?
### Response:
SysDB contributes to high availability in several ways\n- Config and persistent state are replicated between active and standby RPs\n- Processes can resynchronize their state from SysDB after a restart\n- Processes can register for notifications to detect config changes and operational state updates\n- Schema enforcement and config validation prevent invalid state from being propagated\"\n
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