zoukankan      html  css  js  c++  java
  • Oracle Flashback Technologies

    Oracle Flashback Technologies - 闪回数据库

    根据指定的SCN,使用rman闪回数据库

    #查看可以闪回到多久前

    SQL> select * from v$flashback_database_log;


    #查看当前的SCN

    SQL> select current_scn from v$database;
    
    CURRENT_SCN
    -----------
        1462273
    
    SQL> 

    #关闭数据库

    $ rman target /
    
    Recovery Manager: Release 11.2.0.4.0 - Production on Tue Jun 23 06:34:28 2015
    
    Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.
    
    connected to target database: DBTEST (DBID=1275290034)
    
    RMAN> shutdown immediate
    
    using target database control file instead of recovery catalog
    database closed
    database dismounted
    Oracle instance shut down

    #mount数据库

    RMAN> startup mount
    
    connected to target database (not started)
    Oracle instance started
    database mounted
    
    Total System Global Area    2471931904 bytes
    
    Fixed Size                     2255752 bytes
    Variable Size                637535352 bytes
    Database Buffers            1811939328 bytes
    Redo Buffers                  20201472 bytes

    根据SCN闪回数据库

    RMAN> flashback database to scn 1461950;
    
    Starting flashback at 23-JUN-2015 06:35:57
    allocated channel: ORA_DISK_1
    channel ORA_DISK_1: SID=189 device type=DISK
    
    
    starting media recovery
    media recovery complete, elapsed time: 00:00:03
    
    Finished flashback at 23-JUN-2015 06:36:01

    #以resetlogs打开数据库。闪回数据库是基于时间点的恢复,是不完全恢复,要是resetlogs方式打开

    RMAN> alter database open resetlogs;
    
    database opened
    
    RMAN> 

    此外还可以用以下方式闪回数据库:

    #根据时间闪回数据库

    RMAN> flashback database to time "to_date('2015-06-23 06:25:00','yyyy-mm-dd hh24:mi:ss')";


    #根据restore point闪回数据库

    RMAN> flashback database to restore point rp;

    #闪回到上一次resetlogs操作之前

    RMAN> flashback database to before resetlogs;

    以上操作命令,也可以在sql*plus下完成。

  • 相关阅读:
    10丨应该如何理解请求方法?
    采用镜像的方法安装python第三方库
    09丨HTTP报文是什么样子的?
    Fiddler——Https抓包(十二)
    三基础篇(7讲)08丨键入网址再按下回车,后面究竟发生了什么?
    fiddler-弱网测试(十一)
    python中a+=a与a=a+a的区别
    07 | 自己动手,搭建HTTP实验环境
    Fiddler——断点应用(十)
    【HGOI】物品选取
  • 原文地址:https://www.cnblogs.com/abclife/p/4595451.html
Copyright © 2011-2022 走看看