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随后备用数据将流动到主系统中。
而异步可用性则不保证主系统和辅助系统是完全同步的。
Asynchronous availability does not guarantee that primary and secondary system databases are completely synchronized.
备用系统收到日志写后,将确认通知发送到主系统。
Once the standby system receives the log write, it sends acknowledgements to the primary.
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