NFS的缺点是一旦有节点宕机，就挂了。。
远程归档
这种方式相对于NFS要容易的多
ex:
rac1节点
log_archive_dest_2                   string      service=orcl2 db_unique_name=orcl
standby_archive_dest                 string      /u01/oracle/onlinelog2/--远程节点在本地的归档目录
standby_file_management              string      AUTO

有需要的话可以调整log_archive_max_processes
LOG_ARCHIVE_MAX_PROCESSES specifies the number of archiver background processes (ARC0 through ARC9) Oracle initially invokes.

问题：
select member from v$logfile;
SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/u01/oracle/oradata/alone/group_2.275.727831277
+DGB/orcl/onlinelog/group_2.263.727831281
/u01/oracle/oradata/alone/group_1.274.727831267
+DGB/orcl/onlinelog/group_1.264.727831271
/u01/oracle/oradata/alone/group_3.279.727831743
+DGB/orcl/onlinelog/group_3.262.727831749
/u01/oracle/oradata/alone/group_4.280.727831759
--日志文件的convert存在异常持续跟踪。。

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远程归档

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