Backing up your logical logs is always a good idea and it is essential if you plan to do parallel backups or want to be able to perform point-in-time restores (see Type of backups).
备份逻辑日志一直是一个好主意，如果计划执行并行备份或想要执行指定到某一点的还原请参阅备份的类型，那么备份日志非常重要。
If you plan for multiple evolutions, you can distribute activities across the entire project in a manner that ensures that no one group is either overwhelmed or underutilized at any point in time.
如果您为多个演进进行计划，那么您可以通过确保使得所有组在任意时刻都充分利用的方式将活动分布到整个项目过程中。
It is essential that you ensure your logical logs will be backed up regularly if you plan to do parallel backups or want be able to perform point-in-time restores.
如果计划执行并行备份或者希望能够执行指定到某一时间点的还原，则确保定期备份逻辑日志就非常重要。
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