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标题: 达梦数据库系列—13. 数据库的备份和还原 [打印本页]
作者: 宁睿    时间: 2024-8-18 17:04
标题: 达梦数据库系列—13. 数据库的备份和还原
目次

1、配置归档
1.1联机配置归档
手动配置归档
2、联机数据库备份
完全备份
增量备份
3、联机备份管理
添加备份目次
删除备份目次
备份信息查看
监控备份
4、脱机DMRMAN备份数据库
dmrman的配置
完全备份
增量备份
归档备份
5、脱机备份管理
备份集查看
备份集校验
备份集删除
6、还原数据库
7、数据库恢复
从备份集恢复
从归档恢复
恢复数据库到指定lsn
更新 DB_MAGIC
8、增量备份还原恢复

1、配置归档

1.1联机配置归档

修改数据库为MOUNT状态，并开启归档模式

  1. ALTER DATABASE MOUNT;
  3. ALTER DATABASE ARCHIVELOG;
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配置本地归档

  1. ALTER DATABASE ADD ARCHIVELOG 'DEST = /dmdata/dameng/arch_dsc0, TYPE = local, FILE_SIZE = 1024,SPACE_LIMIT = 2048,ARCH_FLUSH_BUF_SIZE=16,HANG_FLAG=1';
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修改数据库为OPEN状态

  1. ALTER DATABASE OPEN;
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手动配置归档

dmarch.ini 文件内容如下：
  1. [ARCHIVE_LOCAL1]
  3. ARCH_TYPE = LOCAL
  5. ARCH_DEST = d:\dm_arch\arch
  7. ARCH_FILE_SIZE = 1024
  9. ARCH_SPACE_LIMIT = 2048
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2、联机数据库备份

完全备份

  1. BACKUP DATABASE FULL BACKUPSET '/dm/backup/db_full_bak_01';
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参数 FULL 可以省略
  1. BACKUP DATABASE BACKUPSET 'db_bak_01';
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备份路径为参数BAK_PATH的路径
  1. BACKUP DATABASE BACKUPSET '/dm/backup/db_bak_3_01';
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指定备份集路径为/dm/backup/db_bak_3_01
  1. BACKUP DATABASE TO WEEKLY_FULL_BAK BACKUPSET '/dm/backup/db_bak_3_02';
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指定备份名为WEEKLY_FULL_BAK
如果不设置备份名，体系会默认创建一个备份名：DB_库名_备份类型_备份时间
增量备份

  1. BACKUP DATABASE INCREMENT WITH BACKUPDIR '/dm/backup' BACKUPSET '/dm/backup/db_increment_bak_02';
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INCREMENT 参数不可省略，指定备份类型为增量备份。累积增量备份，还必要指定 CUMULATIVE 参数，否则缺省为差异增量备份。WITH BACKUPDIR 参数用来指定基备份集的搜索目次。
  1. backup database increment BASE ON BACKUPSET '/dm/backup/dm_bak/db_full_bak_01' to ONLINEBAKINCR_01 backupset '/dm/backup/dm_bak/ONLINEBAK_01' ;
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3、联机备份管理

DM 没有提供自动删除逾期备份的功能，删除备份必要手动实验。
添加备份目次


向 DISK 中添加备份目次/dm/backup
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK','/dm/backup');
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查看备份集信息，必要先添加备份目次，V$BACKUPSET_SEARCH_DIRS有目次信息，当前会话实验查询。
删除备份目次

删除指定备份目次（只删除视图V$BACKUPSET_SEARCH_DIRS记录，不删除文件）
  1. SELECT SF_BAKSET_BACKUP_DIR_REMOVE('DISK','/dm/backup');
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清算全部备份目次，默认备份目次除外（只删除视图V$BACKUPSET_SEARCH_DIRS记录，不删除文件）

  1. SELECT SF_BAKSET_BACKUP_DIR_REMOVE_ALL();
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校验 DISK 中的备份目次/dm/backup/db_bak_for_check 是否合法

  1. SELECT SF_BAKSET_CHECK('DISK','/dm/backup/db_bak_for_check');
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删除指定设备类型和指定目次的备份集（删除整个目次，删除文件）

  1. SELECT SF_BAKSET_REMOVE('DISK','/dm/backup/db_full_bak_01',1);
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删除满足指定条件的所有备份集
必要先使用 SF_BAKSET_BACKUP_DIR_ADD 添加将要删除的备份集目次，否则只删除数据库的默认备份目次下的备份集。
  1. SF_BAKSET_REMOVE_BATCH (device_type varchar,end_time datetime,range int,obj_name varchar(257))
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device_type：设备类型，DISK 或 TAPE。若指定为 NULL，则忽略存储设备的区分。
end_time：删除备份集天生的结束时间，仅删除 end_time 之前的备份集，必须指定。
range：指定删除备份的级别。1 代表库级，2 代表表空间级，3 代表表级，4 代表归档备份。若指定为 NULL，则忽略备份集备份级别的区分。
obj_name：待删除备份集中备份对象的名称，若指定为 NULL，则忽略备份集中备份对象名称区分。
  1. SELECT SF_BAKSET_REMOVE_BATCH ('DISK', now(), NULL, NULL);
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删除满足指定条件的所有库级备份集
  1. SELECT SF_BAKSET_REMOVE_BATCH_S ('DISK', now(), NULL, NULL);
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删除满足指定条件的所有库级备份集，生存备份时间最新的 n 个库级完全备份集
  1. SELECT SF_BAKSET_REMOVE_BATCH_N ('DISK', now(), NULL, NULL, 2);
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删除指定时间之前的数据库备份集
  1. CALL SP_DB_BAKSET_REMOVE_BATCH('DISK', NOW());
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删除指定表空间对象及指定时间之前的表空间备份集
  1. CALL SP_TS_BAKSET_REMOVE_BATCH('DISK',NOW(),'MAIN');
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删除指定表对象及指定时间之前的表备份集
  1. CALL SP_TAB_BAKSET_REMOVE_BATCH('DISK',NOW(),'SYSDBA','TAB_FOR_BATCH_DEL');
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删除指定时间之前的归档备份集
  1. CALL SP_ARCH_BAKSET_REMOVE_BATCH('DISK', NOW());
  3. BACKUP ARCHIVELOG BACKUPSET '/dm/backup/arch_bak_for_batch_del';
  5. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK','/dm/backup');
  7. CALL SP_ARCH_BAKSET_REMOVE_BATCH('DISK', NOW());
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备份信息查看

V$BACKUPSET
表现备份集的基本信息。
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  3. SELECT DEVICE_TYPE,BACKUP_PATH, TYPE, RANGE# FROM V$BACKUPSET;
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V$BACKUPSET_DBINFO
表现备份集的数据库相关信息
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  3. SELECT BACKUP_PATH, PAGE_SIZE, EXTENT_SIZE, CASE_SENSITIVE FROM V$BACKUPSET_DBINFO WHERE BACKUP_PATH='/dm/backup/tab_bak_01';
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V$BACKUPSET_DBF
表现备份集中数据文件的相关信息，表备份时无效
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  3. SELECT FILE_SEQ, TS_ID, FILE_ID, TS_NAME, FILE_NAME FROM V$BACKUPSET_DBF WHERE BACKUPPATH ='/dm/backup/ts_bak_for_dbf';
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V$BACKUPSET_ARCH
表现备份集中归档文件的信息，且仅归档备份才会有数据。
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  3. SELECT BACKUPPATH, FILE_SEQ, BEGIN_LSN, END_LSN FROM V$BACKUPSET_ARCH
  5. WHERE BACKUPPATH='/dm/backup/db_bak_for_arch';
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V$BACKUPSET_BKP
表现备份集的备份片信息。
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  3. SELECT BACKUPPATH, BKP_NTH, FILE_NAME, BKP_LEN FROM V$BACKUPSET_BKP WHERE
  5. BACKUPPATH='/dm/backup/db_bak_for_bkp';
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V$BACKUPSET_SEARCH_DIRS
表现动态视图备份集搜索目次。BAK_PATH、SYSTEM_PATH和添加的备份目次
  1. SELECT SF_BAKSET_BACKUP_DIR_REMOVE_ALL();
  3. SELECT * FROM V$BACKUPSET_SEARCH_DIRS;
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V$BACKUPSET_TABLE
表现表备份集中备份表信息，仅表备份有效。
  1. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  3. SELECT BACKUPNAME, TABLENAME FROM V$BACKUPSET_TABLE WHERE BACKUPPATH='/dm/backup/tab_bak_for_info';
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V$BACKUPSET_SUBS
并行备份中天生的子备份集信息。
  1. BACKUP DATABASE BACKUPSET '/dm/backup/db_bak_for_subs' PARALLEL 3;
  3. SELECT SF_BAKSET_BACKUP_DIR_ADD('DISK', '/dm/backup');
  5. SELECT BACKUPPATH, BKP_NUM, DBF_NUM FROM V$BACKUPSET_SUBS;
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监控备份

V$BACKUP_MONITOR
当前备份使命实时监控信息。
  1. BACKUP DATABASE BACKUPSET '/dm/backup/db_bak_for_monitor';
  3. SELECT TOTAL_SIZE, PCNT, CUR_READ, CUR_WRITE FROM V$BACKUP_MONITOR;
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V$BACKUP_FILES
当前备份使命待备份数据文件列表。
V$BACKUP_HISTORY
最近 100 条备份监控信息。
  1. SELECT READ_SIZE, WRITE_SIZE, AVG_READ, AVG_WRITE FROM V$BACKUP_HISTORY;
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4、脱机DMRMAN备份数据库

dmrman的配置

表现 DMRMAN 配置项的当前值
  1. RMAN>CONFIGURE;
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配置存储介质类型：DISK 或 TAPE
  1. RMAN>CONFIGURE DEFAULT DEVICE TYPE TAPE PARMS 'command';
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配置跟踪日记文件
  1. RMAN>CONFIGURE DEFAULT TRACE FILE '/dm/backup/dm_bak/trace.log' TRACE LEVEL 2;
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配置备份集搜索目次

  1. RMAN>CONFIGURE DEFAULT BACKUPDIR;
  3. RMAN>CONFIGURE DEFAULT BACKUPDIR '/dm/backup/dm_bak';
  5. RMAN>CONFIGURE DEFAULT BACKUPDIR ADD '/home/dm_bak3';
  7. RMAN>CONFIGURE DEFAULT BACKUPDIR DELETE '/home/dm_bak3';
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配置归档日记搜索目次

  1. RMAN>CONFIGURE DEFAULT ARCHIVEDIR;
  3. RMAN>CONFIGURE DEFAULT ARCHIVEDIR '/dm/backup/dm_arch1';
  5. RMAN>CONFIGURE DEFAULT ARCHIVEDIR ADD '/home/dm_arch3';
  7. RMAN>CONFIGURE DEFAULT ARCHIVEDIR DELETE '/home/dm_arch3';
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完全备份

  1. RMAN>BACKUP DATABASE '/dm/data/DMDB/dm.ini' FULL BACKUPSET '/dm/backup/dm_bak/db_full_bak_01';
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增量备份

  1. RMAN>BACKUP DATABASE '/dm/data/DMDB/dm.ini' INCREMENT WITH BACKUPDIR '/dm/backup/dm_bak' BACKUPSET '/dm/backup/dm_bak/db_increment_bak_02';
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归档备份

  1. RMAN>BACKUP ARCHIVE LOG ALL DATABASE '/opt/dmdbms/data/DAMENG/dm.ini' BACKUPSET '/home/dm_bak/arch_all_bak_01';
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  1. RMAN>BACKUP ARCHIVE LOG LSN BETWEEN 50000 AND 120000 DATABASE '/dm/data/DMDB/dm.ini' BACKUPSET '/dm/backup/dm_bak/arch_lsn_bak_02';
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5、脱机备份管理

备份集查看

  1. RMAN> show backupset '/dm/backup/dm_bak';
  3. RMAN> SHOW BACKUPSETS WITH BACKUPDIR '/dm/backup/dm_bak/db_full_bak_01';
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查看指定目次下所有备份集信息。
  1. RMAN>SHOW BACKUPSETS WITH BACKUPDIR '/dm/backup/dm_bak' USE DB_MAGIC 511306610;
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查看部分备份集信息,DB、META、FILE、TABLESPACE、TABLE

  1. RMAN> show backupset '/dm/backup/dm_bak/db_full_bak_01' info meta
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备份集校验

  1. RMAN>CHECK BACKUPSET '/dm/backup/dm_bak/db_full_bak_01';
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备份集删除

  1. RMAN>REMOVE BACKUPSET '/dm/backup/dm_bak/db_full_bak_01';
  3. RMAN>REMOVE BACKUPSET '/dm/backup/dm_bak/db_full_bak_01' DATABASE '/dm/data/DMDB/dm.ini';
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删除备份目次下的某一个数据库备份集

  1. RMAN>REMOVE BACKUPSETS WITH BACKUPDIR '/dm/backup/dm_bak';
  3. RMAN>REMOVE BACKUPSETS WITH BACKUPDIR '/dm/backup/dm_bak' UNTIL TIME '2024-06-25 13:38:00';
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会删除整个目次


6、还原数据库

表还原只能联机举行，数据库和表空间的还原只能脱机dmrman下举行。

备份数据库
  1. SQL>BACKUP DATABASE BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
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准备目标库
  1. dminit path=/dm/data db_name=DAMENG_FOR_RESTORE auto_overwrite=1
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校验备份

  1. RMAN>CHECK BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
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还原数据库

  1. RMAN>RESTORE DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
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也可指定 REUSE DMINI 子句举行数据库还原，此时会将备份集中备份的 dm.ini 中除路径相关的 INI 参数外，均拷贝到当前 dm.ini 上。如下所示：
  1. RMAN> RESTORE DATABASE '/opt/dmdbms/data/DAMENG_FOR_RESTORE/dm.ini' REUSE DMINI FROM BACKUPSET '/home/dm_bak/db_full_bak_for_restore';
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  1. RMAN> CHECK BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
  3. CHECK BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
  5. [Percent:100.00%][Speed:0.00M/s][Cost:00:00:00][Remaining:00:00:00]                                 
  7. check backupset successfully.
  9. time used: 184.800(ms)
  11. RMAN> RESTORE DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
  13. RESTORE DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
  15. file dm.key not found, use default license!
  17. Normal of FAST
  19. Normal of DEFAULT
  21. Normal of RECYCLE
  23. Normal of KEEP
  25. Normal of ROLL
  27. [Percent:100.00%][Speed:0.00M/s][Cost:00:00:02][Remaining:00:00:00]                                 
  29. restore successfully.
  31. time used: 00:00:02.678
  33. RMAN> RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
  35. RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
  37. Database mode = 2, oguid = 0
  39. Normal of FAST
  41. Normal of DEFAULT
  43. Normal of RECYCLE
  45. Normal of KEEP
  47. Normal of ROLL
  49. EP[0]'s cur_lsn[212204], file_lsn[212204]
  51. [Percent:100.00%][Speed:0.00PKG/s][Cost:00:00:00][Remaining:00:00:00]                              
  53. recover successfully!
  55. time used: 00:00:02.713
  57. RMAN> RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' UPDATE DB_MAGIC;
  59. RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' UPDATE DB_MAGIC;
  61. Database mode = 2, oguid = 0
  63. Normal of FAST
  65. Normal of DEFAULT
  67. Normal of RECYCLE
  69. Normal of KEEP
  71. Normal of ROLL
  73. EP[0]'s cur_lsn[212348], file_lsn[212348]
  75. recover successfully!
  77. time used: 00:00:01.086
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7、数据库恢复

从备份集恢复

  1. RMAN>RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_restore';
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从归档恢复

1.联机数据库实验备份，产生备份集 B1；
  1. BACKUP DATABASE FULL TO B1 BACKUPSET '/dm/backup/dm_bak/B1' DEVICE TYPE DISK BACKUPINFO 'DAMENG FULL BACKUP ONLINE' MAXPIECESIZE 2048;
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2.向表中循环插入数据为例来操纵数据库，在插入数据的过程中，强行杀掉数据库服务器进程模拟故障；
  1. DROP TABLE TAB_FOR_RECOVER;
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  1. CREATE TABLE TAB_FOR_RECOVER(C1 INT);
  3. BEGIN
  5.   FOR I IN 1..100000 LOOP
  7.      INSERT INTO TAB_FOR_RECOVER VALUES(I);
  9.      COMMIT;
  11.   END LOOP;
  13. END;
  15. /
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3.创建目标库 D2，即待还原的库；
  1. dminit path=/dm/data db_name=DAMENG_FOR_RES
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4.启动 DMRMAN 工具，修复源库 D1 归档文件；
  1. RMAN>REPAIR ARCHIVELOG DATABASE '/dm/data/DMDB/dm.ini'
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5.使用备份集 B1 及归档 将目标库 D2 恢复到最新状态。
  1. RMAN>RESTORE DATABASE '/dm/data/DAMENG_FOR_RES/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/B1';
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  1. RMAN>RECOVER DATABASE '/dm/data/DAMENG_FOR_RES/dm.ini' WITH ARCHIVEDIR '/dm/data/DMDB/arch';
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  1. SQL> BACKUP DATABASE FULL TO B1 BACKUPSET '/dm/backup/dm_bak/B1' DEVICE TYPE DISK BACKUPINFO 'DAMENG FULL BACKUP ONLINE' MAXPIECESIZE 2048;
  3. 操作已执行
  5. 已用时间: 00:00:03.181. 执行号:2102.
  7. SQL> CREATE TABLE TAB_FOR_RECOVER(C1 INT);
  9. 操作已执行
  11. 已用时间: 16.851(毫秒). 执行号:2103.
  13. SQL> BEGIN
  15.   FOR I IN 1..100000 LOOP
  17.      INSERT INTO TAB_FOR_RECOVER VALUES(I);
  19.      COMMIT;
  21.   END LOOP;
  23. END;
  25. /2   3   4   5   6   7   
  27. 连接丢失
  29. SQL>
  31. RMAN> RESTORE DATABASE '/dm/data/DAMENG_FOR_RES/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/B1';
  33. RESTORE DATABASE '/dm/data/DAMENG_FOR_RES/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/B1';
  35. file dm.key not found, use default license!
  37. Normal of FAST
  39. Normal of DEFAULT
  41. Normal of RECYCLE
  43. Normal of KEEP
  45. Normal of ROLL
  47. [Percent:100.00%][Speed:0.00M/s][Cost:00:00:02][Remaining:00:00:00]                                 
  49. restore successfully.
  51. time used: 00:00:02.577
  53. RMAN> REPAIR ARCHIVELOG DATABASE '/dm/data/DMDB/dm.ini';
  55. REPAIR ARCHIVELOG DATABASE '/dm/data/DMDB/dm.ini';
  57. Database mode = 0, oguid = 0
  59. Normal of FAST
  61. Normal of DEFAULT
  63. Normal of RECYCLE
  65. Normal of KEEP
  67. Normal of ROLL
  69. Can not open ini file /dm/data/DMDB/dmmal.ini!
  71. begin redo pwr log collect, last ckpt lsn: 488116 ...
  73. redo pwr log collect finished
  75. EP[0]'s cur_lsn[574475], file_lsn[574475]
  77. rafil_recv_if_necessary, arch file recv begin: arch_lsn: 574470, clsn: 574475, begin_seq: 86209, end_seq: 86209
  79. arch file recv end: arch_lsn: 574471, clsn: 574475, begin_seq: 86209, end_seq: 86209
  81. repair archive log successfully.
  83. repair time used: 658.107(ms)
  85. time used: 658.543(ms)
  87. RMAN> RECOVER DATABASE '/dm/data/DAMENG_FOR_RES/dm.ini' WITH ARCHIVEDIR '/dm/data/DMDB/arch';
  89. RECOVER DATABASE '/dm/data/DAMENG_FOR_RES/dm.ini' WITH ARCHIVEDIR '/dm/data/DMDB/arch';
  91. Database mode = 2, oguid = 0
  93. Normal of FAST
  95. Normal of DEFAULT
  97. Normal of RECYCLE
  99. Normal of KEEP
  101. Normal of ROLL
  103. EP[0]'s cur_lsn[326510], file_lsn[326510]
  105. [Percent:100.00%][Speed:9180.00PKG/s][Cost:00:00:03][Remaining:00:00:00]                           
  107. recover successfully!
  109. time used: 00:00:04.228
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恢复数据库到指定lsn

1.准备数据；
  1. CREATE TABLE TAB_FOR_RECOVER_01(C1 INT);
  3. INSERT INTO TAB_FOR_RECOVER_01 VALUES(1);
  5. COMMIT;
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2.备份数据库；
  1. BACKUP DATABASE BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_time_lsn';
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操纵数据库，产生一些归档；
  1. CREATE TABLE TAB_FOR_RECOVER_02(C1 INT);
  3. INSERT INTO TAB_FOR_RECOVER_02 VALUES(1);
  5. COMMIT;
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使用 SELECT SYSDATE 命令查询此时的时间为：2018-11-16 10:56:40。
使用 SELECT FILE_LSN FROM V$RLOG 命令查询此时的 LSN 为：50857。

4.误操纵数据库。此步骤误删除了表 TAB_FOR_RECOVER_01 中数据；
  1. DELETE FROM TAB_FOR_RECOVER_01;
  3. COMMIT;
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5.还原数据库
  1. RMAN> RESTORE DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_for_time_lsn';
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6.恢复数据库到指定时间点/LSN
  1. RMAN>RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' WITH ARCHIVEDIR '/dm/data/DMDB/arch' UNTIL TIME '2024-06-25 14:50:13';
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或
  1. RMAN>RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' WITH ARCHIVEDIR '/dm/data/DMDB/arch' UNTIL LSN 50857;
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更新 DB_MAGIC

  1. RMAN>RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' UPDATE DB_MAGIC;
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8、增量备份还原恢复

1.做一个联机全备。
  1. BACKUP DATABASE FULL BACKUPSET '/dm/backup/dm_bak/db_full_bak_01';
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2.造测试数据。
  1. CREATE TABLE TAB_FOR_RECOVER_03(C1 INT);
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  1. BEGIN
  3.   FOR I IN 1..1000 LOOP
  5.      INSERT INTO TAB_FOR_RECOVER_03 VALUES(I);
  7.      COMMIT;
  9.   END LOOP;
  11. END;
  13. /
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3.做一个联机增量备份。
  1. BACKUP DATABASE INCREMENT WITH BACKUPDIR '/dm/backup/dm_bak' BACKUPSET '/dm/backup/dm_bak/db_increment_bak_02';
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4.初始化一个新的数据库（还原库）
  1. dminit path=/dm/data db_name=DAMENG_FOR_RESTORE auto_overwrite=1
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5.全量还原恢复
  1. RESTORE DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_01';
  3. RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_full_bak_01';
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6.增量还原恢复
  1. RESTORE DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_increment_bak_02';
  3. RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' FROM BACKUPSET '/dm/backup/dm_bak/db_increment_bak_02';
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7.更新DB_MAGIC
  1. RECOVER DATABASE '/dm/data/DAMENG_FOR_RESTORE/dm.ini' UPDATE DB_MAGIC;
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8.验证数据
  1. su - root
  3. cd /dm/script/root/
  5. ./dm_service_installer.sh -t dmserver -dm_ini /dm/data/DAMENG_FOR_RESTORE/dm.ini -p DAMENG_FOR_RESTORE
  7. [dmdba@localhost ~]$ disql SYSDBA
  9. SQL> select count(*) from TAB_FOR_RECOVER_03;
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