1、
https://blog.csdn.net/weixin_39996496/article/details/116338950?spm=1001.2101.3001.6650.3&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-3-116338950-blog-116342348.235%5Ev38%5Epc_relevant_anti_t3&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-3-116338950-blog-116342348.235%5Ev38%5Epc_relevant_anti_t3&utm_relevant_index=6
https://blog.csdn.net/weixin_39642981/article/details/116373353?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-1-116373353-blog-116342348.235%5Ev38%5Epc_relevant_anti_t3&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-1-116373353-blog-116342348.235%5Ev38%5Epc_relevant_anti_t3&utm_relevant_index=2
catalog的官方文档路径
Nocatalog就是用control file控制文件记录备份信息
Catalog就是一些表，里面记录备份信息，也就是说使用单独的数据库用户，单独的表空间，单独的表来保存备份记录，以此替代控制文件记录备份信息
2、