搜索
首页数据库mysql教程基于cancel的不完全恢复

实验:基于cancel的不完全恢复 实验环境查看 lsnrctl status select open_mode from v$database; --监听与数据库状态 show parameter recovery; select flashback_on from v$database; archive log list; --闪回与归档的配置 1)准备环境:RMAN全库备份 RMAN


实验:基于cancel的不完全恢复

实验环境查看

lsnrctl status
select open_mode from v$database;
--监听与数据库状态

show parameter recovery;
select flashback_on from v$database;
archive log list;
--闪回与归档的配置

1)准备环境:RMAN全库备份
RMAN> backup as compressed backupset full database;
--压缩备份
--backup full database ;备份集备份

Starting backup at 20-MAR-13
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=45 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/u01/app/oracle/oradata/ORA11GR2/system01.dbf
input datafile file number=00002 name=/u01/app/oracle/oradata/ORA11GR2/sysaux01.dbf
input datafile file number=00003 name=/u01/app/oracle/oradata/ORA11GR2/undotbs01.dbf
input datafile file number=00005 name=/u01/app/oracle/oradata/ORA11GR2/example01.dbf
input datafile file number=00004 name=/u01/app/oracle/oradata/ORA11GR2/users01.dbf
channel ORA_DISK_1: starting piece 1 at 20-MAR-13
channel ORA_DISK_1: finished piece 1 at 20-MAR-13
piece handle=/u01/app/FRA/ORA11GR2/backupset/2013_03_20/o1_mf_nnndf_TAG20130320T151949_8nlrrrfm_.bkp tag=TAG20130320T151949 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:02:17
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: starting piece 1 at 20-MAR-13
channel ORA_DISK_1: finished piece 1 at 20-MAR-13
piece handle=/u01/app/FRA/ORA11GR2/backupset/2013_03_20/o1_mf_ncsnf_TAG20130320T151949_8nlrx2qs_.bkp tag=TAG20130320T151949 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 20-MAR-13

2)创建测试数据
SYS@ORA11GR2>create table scott.t1 as select 1 as id from dual;

Table created.

SYS@ORA11GR2>alter system archive log current;

System altered.

SYS@ORA11GR2>create table scott.t2 as select 2 as id from dual;

Table created.

SYS@ORA11GR2>alter system archive log current;

System altered.

SYS@ORA11GR2>create table scott.t3 as select 3 as id from dual;

Table created.

SYS@ORA11GR2>alter system archive log current;

System altered.

SYS@ORA11GR2>
SYS@ORA11GR2>select table_name,tablespace_name from dba_tables where owner='SCOTT' AND table_name LIKE 'T_';

TABLE_NAME TABLESPACE_NAME
------------------------- ------------------------------
T3 USERS
T2 USERS
T1 USERS

完成测试数据构造后,查看生成的归档日志
ls /u01/app/oracle/fast_recovery_area/PROD/archivelog/2014_10_08
ls -lrt


3)删除所有数据文件和在线数据文件

在sqlplus里面删除:
SYS@PROD>select name from v$datafile;

NAME
--------------------
/u01/app/oracle/oradata/PROD/datafile/o1_mf_system_b2251bs1_.dbf

/u01/app/oracle/oradata/PROD/datafile/o1_mf_sysaux_b2251bvo_.dbf

/u01/app/oracle/oradata/PROD/datafile/o1_mf_undotbs1_b2251bw5_.dbf

/u01/app/oracle/oradata/PROD/datafile/o1_mf_users_b2251byw_.dbf

/u01/app/oracle/oradata/PROD/datafile/o1_mf_example_b2257d0c_.dbf

/u01/app/oracle/oradata/PROD/datafile/tbs_move_01.dbf

SYS@PROD>select member from v$logfile;

MEMBER
----------------------------------------------------------------------------------------------------------------------------------
/u01/app/oracle/oradata/PROD/onlinelog/o1_mf_3_b22567o2_.log
/u01/app/oracle/fast_recovery_area/PROD/onlinelog/o1_mf_3_b2256827_.log
/u01/app/oracle/oradata/PROD/onlinelog/o1_mf_2_b2255zsg_.log
/u01/app/oracle/fast_recovery_area/PROD/onlinelog/o1_mf_2_b22560gb_.log
/u01/app/oracle/oradata/PROD/onlinelog/o1_mf_1_b2255npg_.log
/u01/app/oracle/fast_recovery_area/PROD/onlinelog/o1_mf_1_b2255nxl_.log


SYS@PROD>!rm /u01/app/oracle/oradata/PROD/datafile/*.dbf;

SYS@PROD>!rm /u01/app/oracle/oradata/PROD/onlinelog/*.log;

SYS@PROD>!rm /u01/app/oracle/fast_recovery_area/PROD/onlinelog/*.log;


在OS里面删除:
[oracle@ocmu ORA11GR2]$ pwd
/u01/app/oracle/oradata/ORA11GR2
[oracle@ocmu ORA11GR2]$ ls
control01.ctl example01.dbf redo02.log sysaux01.dbf temp01.dbf users01.dbf
control02.ctl redo01.log redo03.log system01.dbf undotbs01.dbf
[oracle@ocmu ORA11GR2]$ rm *.log
[oracle@ocmu ORA11GR2]$ ls
control01.ctl example01.dbf system01.dbf undotbs01.dbf
control02.ctl sysaux01.dbf temp01.dbf users01.dbf
[oracle@ocmu ORA11GR2]$


4)数据库启动到mount模式
SYS@ORA11GR2>shutdown abort;
ORACLE instance shut down.
SYS@ORA11GR2>startup mount;
ORACLE instance started.

Total System Global Area 841162752 bytes
Fixed Size 1339768 bytes
Variable Size 532680328 bytes
Database Buffers 301989888 bytes
Redo Buffers 5152768 bytes
Database mounted.
SYS@ORA11GR2>


5)RMAN还原数据库
RMAN> restore database;

Starting restore at 20-MAR-13
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=18 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /u01/app/oracle/oradata/ORA11GR2/system01.dbf
channel ORA_DISK_1: restoring datafile 00002 to /u01/app/oracle/oradata/ORA11GR2/sysaux01.dbf
channel ORA_DISK_1: restoring datafile 00003 to /u01/app/oracle/oradata/ORA11GR2/undotbs01.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/app/oracle/oradata/ORA11GR2/users01.dbf
channel ORA_DISK_1: restoring datafile 00005 to /u01/app/oracle/oradata/ORA11GR2/example01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/FRA/ORA11GR2/backupset/2013_03_20/o1_mf_nnndf_TAG20130320T151949_8nlrrrfm_.bkp
channel ORA_DISK_1: piece handle=/u01/app/FRA/ORA11GR2/backupset/2013_03_20/o1_mf_nnndf_TAG20130320T151949_8nlrrrfm_.bkp tag=TAG20130320T151949
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:03:26
Finished restore at 20-MAR-13

RMAN>


6)基于cancel恢复
SYS@ORA11GR2>recover database until cancel;
--在sqlplus中完成

ORA-00279: change 883460 generated at 03/20/2013 15:19:50 needed for thread 1
ORA-00289: suggestion :
/u01/app/FRA/ORA11GR2/archivelog/2013_03_20/o1_mf_1_8_8nlrzy8w_.arc
ORA-00280: change 883460 for thread 1 is in sequence #8


Specify log: {=suggested | filename | AUTO | CANCEL}

--应用sequence #8为8,名字为o1_mf_1_8_8nlrzy8w_.arc的归档日志文件,直接按回车键

ORA-00279: change 884069 generated at 03/20/2013 15:23:42 needed for thread 1
ORA-00289: suggestion :
/u01/app/FRA/ORA11GR2/archivelog/2013_03_20/o1_mf_1_9_8nls091w_.arc
ORA-00280: change 884069 for thread 1 is in sequence #9
ORA-00278: log file
'/u01/app/FRA/ORA11GR2/archivelog/2013_03_20/o1_mf_1_8_8nlrzy8w_.arc' no longer
needed for this recovery


Specify log: {=suggested | filename | AUTO | CANCEL}

--应用sequence #9为9的这个归档日志文件,直接按回车键

ORA-00279: change 884101 generated at 03/20/2013 15:23:53 needed for thread 1
ORA-00289: suggestion :
/u01/app/FRA/ORA11GR2/archivelog/2013_03_20/o1_mf_1_10_8nls0os6_.arc
ORA-00280: change 884101 for thread 1 is in sequence #10
ORA-00278: log file
'/u01/app/FRA/ORA11GR2/archivelog/2013_03_20/o1_mf_1_9_8nls091w_.arc' no longer
needed for this recovery


Specify log: {=suggested | filename | AUTO | CANCEL}
cancel
--手动输入cancel结束恢复,不管后面有没有可恢复文件,都会结束;
Media recovery cancelled.
SYS@ORA11GR2>
SYS@ORA11GR2>alter database open resetlogs;

Database altered.

SYS@ORA11GR2>


7)检查
SYS@ORA11GR2>select table_name,tablespace_name from dba_tables where owner='SCOTT' AND table_name LIKE 'T_';

TABLE_NAME TABLESPACE_NAME
------------------------- ------------------------------
T2 USERS
T1 USERS

SYS@ORA11GR2>
注 应用了两个归档日志,第三个归档日志cancel了,从结果中也可以看到,恢复以后的数据库中,只
存在T1,T2两张表,它们俩的重做日志就在前两个归档中,T3表的所有重做条目都在第三个归档中,
由于采取了cancel,所以,T3表并未恢复

声明
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系admin@php.cn
您如何处理MySQL中的数据库升级?您如何处理MySQL中的数据库升级?Apr 30, 2025 am 12:28 AM

MySQL数据库升级的步骤包括:1.备份数据库,2.停止当前MySQL服务,3.安装新版本MySQL,4.启动新版本MySQL服务,5.恢复数据库。升级过程需注意兼容性问题,并可使用高级工具如PerconaToolkit进行测试和优化。

您可以使用MySQL的不同备份策略是什么?您可以使用MySQL的不同备份策略是什么?Apr 30, 2025 am 12:28 AM

MySQL备份策略包括逻辑备份、物理备份、增量备份、基于复制的备份和云备份。1.逻辑备份使用mysqldump导出数据库结构和数据,适合小型数据库和版本迁移。2.物理备份通过复制数据文件,速度快且全面,但需数据库一致性。3.增量备份利用二进制日志记录变化,适用于大型数据库。4.基于复制的备份通过从服务器备份,减少对生产系统的影响。5.云备份如AmazonRDS提供自动化解决方案,但成本和控制需考虑。选择策略时应考虑数据库大小、停机容忍度、恢复时间和恢复点目标。

什么是mySQL聚类?什么是mySQL聚类?Apr 30, 2025 am 12:28 AM

MySQLclusteringenhancesdatabaserobustnessandscalabilitybydistributingdataacrossmultiplenodes.ItusestheNDBenginefordatareplicationandfaulttolerance,ensuringhighavailability.Setupinvolvesconfiguringmanagement,data,andSQLnodes,withcarefulmonitoringandpe

如何优化数据库架构设计以在MySQL中的性能?如何优化数据库架构设计以在MySQL中的性能?Apr 30, 2025 am 12:27 AM

在MySQL中优化数据库模式设计可通过以下步骤提升性能:1.索引优化:在常用查询列上创建索引,平衡查询和插入更新的开销。2.表结构优化:通过规范化或反规范化减少数据冗余,提高访问效率。3.数据类型选择:使用合适的数据类型,如INT替代VARCHAR,减少存储空间。4.分区和分表:对于大数据量,使用分区和分表分散数据,提升查询和维护效率。

您如何优化MySQL性能?您如何优化MySQL性能?Apr 30, 2025 am 12:26 AM

tooptimizemysqlperformance,lofterTheSeSteps:1)inasemproperIndexingTospeedUpqueries,2)使用ExplaintplaintoAnalyzeandoptimizequeryPerformance,3)ActiveServerConfigurationStersLikeTlikeTlikeTlikeIkeLikeIkeIkeLikeIkeLikeIkeLikeIkeLikeNodb_buffer_pool_sizizeandmax_connections,4)

如何使用MySQL的函数进行数据处理和计算如何使用MySQL的函数进行数据处理和计算Apr 29, 2025 pm 04:21 PM

MySQL函数可用于数据处理和计算。1.基本用法包括字符串处理、日期计算和数学运算。2.高级用法涉及结合多个函数实现复杂操作。3.性能优化需避免在WHERE子句中使用函数,并使用GROUPBY和临时表。

MySQL批量插入数据的高效方法MySQL批量插入数据的高效方法Apr 29, 2025 pm 04:18 PM

MySQL批量插入数据的高效方法包括:1.使用INSERTINTO...VALUES语法,2.利用LOADDATAINFILE命令,3.使用事务处理,4.调整批量大小,5.禁用索引,6.使用INSERTIGNORE或INSERT...ONDUPLICATEKEYUPDATE,这些方法能显着提升数据库操作效率。

给MySQL表添加和删除字段的操作步骤给MySQL表添加和删除字段的操作步骤Apr 29, 2025 pm 04:15 PM

在MySQL中,添加字段使用ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column,删除字段使用ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop。添加字段时,需指定位置以优化查询性能和数据结构;删除字段前需确认操作不可逆;使用在线DDL、备份数据、测试环境和低负载时间段修改表结构是性能优化和最佳实践。

See all articles

热AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智能驱动的应用程序,用于创建逼真的裸体照片

AI Clothes Remover

AI Clothes Remover

用于从照片中去除衣服的在线人工智能工具。

Undress AI Tool

Undress AI Tool

免费脱衣服图片

Clothoff.io

Clothoff.io

AI脱衣机

Video Face Swap

Video Face Swap

使用我们完全免费的人工智能换脸工具轻松在任何视频中换脸!

热工具

螳螂BT

螳螂BT

Mantis是一个易于部署的基于Web的缺陷跟踪工具,用于帮助产品缺陷跟踪。它需要PHP、MySQL和一个Web服务器。请查看我们的演示和托管服务。

MinGW - 适用于 Windows 的极简 GNU

MinGW - 适用于 Windows 的极简 GNU

这个项目正在迁移到osdn.net/projects/mingw的过程中,你可以继续在那里关注我们。MinGW:GNU编译器集合(GCC)的本地Windows移植版本,可自由分发的导入库和用于构建本地Windows应用程序的头文件;包括对MSVC运行时的扩展,以支持C99功能。MinGW的所有软件都可以在64位Windows平台上运行。

SublimeText3 英文版

SublimeText3 英文版

推荐:为Win版本,支持代码提示!

PhpStorm Mac 版本

PhpStorm Mac 版本

最新(2018.2.1 )专业的PHP集成开发工具

EditPlus 中文破解版

EditPlus 中文破解版

体积小,语法高亮,不支持代码提示功能