使用RMAN 创建DATAGUARD ,在两台服务器上:
   1) 主库初始化参数文件主要参数:
      log_archive_dest_1='LOCATION=/u1/oracle/archive'
   2) 备库初始化参数文件主要参数:
      log_archive_dest_1='LOCATION=/u1/oracle/archive'
      log_archive_dest_2='service=lmj'
      fal_client=clon
      fal_server=lmj
      standby_archive_dest='/u1/oracle/archive'
      standby_file_management='AUTO'
      service_names='lmj'
      local_listener='(ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.244)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(KEY = lmj)))'
   3) 备库的目录结构和主库要一致.
   4) 备库创建参数文件和口令文件.
   5) 主备库要添加主库的两个服务名.
   6) 在主库系统上做主库RMAN 备份:
   run {
    allocate channel c1 device type disk;
    backup as compressed backupset
   format '/u1/backup/db_%T_%s_%p.dbf'
    database tag='db_full';
   backup format '/u1/backup/arc_%T_%s.%p.dbf'
   archivelog all delete input
   tag='arc_bak';
    backup format '/u1/backup/stbcon.bak'
   current controlfile for standby reuse
   tag='db_stb';
     }
   7) 将主库的备份集 COPY 到备库的相同目录下.
   8) 在备库上实现RMAN 创建备库的 DATAGUARD
     $: rman catalog rman/rman@rman target sys/oracle@lmj
        rman> connect auxiliary /;
        rman> run  {
                     allocate auxiliary channel c1 device type disk;
                     duplicate target database for standby nofilenamecheck;
                   }