This option is useful if you have replica sets.
如果你有这个选项是有用的副本集。
Better replication: real time, replica sets, more options for data durability.
更好的复制功能：实时、复制集、更多数据耐久性选项。
The documentation talks a lot about metadata management and ways in which individual replica sets can implement it.
该文档大量谈及元数据管理和单独副本集对它的实现方式。
MongoDB 1.6 is a major release addressing the scaling-out issue through sharding and adding replica sets for automatic failover and recovery.
MongoDB 1.6是一个重要的版本，解决了水平扩展的问题，为自动故障转移和恢复提供了Sharding机制，并增加了副本集合的特性。
The cumulative number of replica sets from which this computer's membership has been provisionally deleted, but could still be reanimated.
这台计算机成员身份已经删除但还可以重新加进的那个复制集的累计数。
SetReplID [datetime] sets the database replica ID.
SetReplID [datetime]设置数据库副本id。
SetReplID [datetime] sets the database replica ID.
SetReplID [datetime]设置数据库副本id。
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