As the remote file server (RFS) process writes the redo data to standby redo log files on the standby database, apply services can recover redo from standby redo log files as they are being filled.
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- Figure 7-1 展示了一个data guard配置情况，包含一个本地归档位置和一个远程归档位置，随着rfs进程将重做数据写入到备用数据库的备用日志文件中，应用服务将会从备用日志文件恢复重做数据，当它们被填写满的时候：shows a Data Guard configuration with a local destination and a standby destination.
