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HomeDatabaseMysql TutorialOracle从备份集中抓出归档日志方法

在实际环境中遇到这个问题,数据库为归档状态,但归档完毕后rman通过crontab自动备走归档日志并删除存在系统上的归档日志文件。在

在实际环境中遇到这个问题,数据库为归档状态,但归档完毕后rman通过crontab自动备走归档日志并删除存在系统上的归档日志文件。在RealSync程序停止一段时间后,需要应用归档日志来解决日志丢失问题。

问题是:

数据库中的控制文件中关于备份的元数据已经丢失,但备份集存在。这时候我们开始调用Oracle的一个内部非公开的函数包:dbms_backup_restore 来从备份集中抽取归档日志到指定的系统目录。以满足我们的需求。

语句如下:

declare
devtype varchar2(256);
done boolean;
begin
devtype:=sys.dbms_backup_restore.deviceAllocate(type=>'',ident=>'t2');
sys.dbms_backup_restore.restoreSetArchivedLog(destination=>'/archivelog02');
sys.dbms_backup_restore.restoreArchivedLog(thread=>2,sequence=>51500);
sys.dbms_backup_restore.restoreBackupPiece(done=>done,handle=>'/backup/zlhis/rman/AL_ZLHIS_20141030_862336902_23768_1',params=>null);
sys.dbms_backup_restore.deviceDeallocate;
end;

注意我们修改的地方是:destination=>'/archivelog02指定恢复出来归档日志的存放系统目录位置,thread表示rac的thread号,,sequence为需要恢复的那个归档日志序列号,handle表示备份集的绝对路径。

修改完毕后,直接在sqlplus命令窗口执行即可。

在CentOS 6.4下安装Oracle 11gR2(x64)

Oracle 11gR2 在VMWare虚拟机中安装步骤

Debian 下 安装 Oracle 11g XE R2

本文永久更新链接地址:

linux

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