Recovering from the loss of one member of an online redo log group.
从丢失的联机重做日志组的成员中进行恢复。
Creates the online redo log files if they do not currently exist.
联机日志损坏，不能做完整修复时，用的。
Copy all data files, control files and online redo logs file to backup media.
将所有数据文件、控制文件和联机重做日志文件复制到备份媒介。
Apply the redo (both online and archived).
应用重做(联机和归档的)。
Apply the redo (both online and archived).
应用重做(联机和归档的)。
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