Study the control of backup granularity and demarcation criterion, and divide backup data to satisfy the system requirement according to backup window and system stability.

研究了备份粒度控制。讨论备份粒度的划分依据，根据备份窗口和系统稳定性划分备份数据，使备份粒度满足系统要求。

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Study the control of backup granularity and demarcation criterion, and divide backup data to satisfy the system requirement according to backup window and system stability.

研究了备份粒度控制。讨论备份粒度的划分依据，根据备份窗口和系统稳定性划分备份数据，使备份粒度满足系统要求。

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