1.备份数据库 run { allocate channel ch1 device type disk; backup as compressed backupset full filesperset 5 database format ‘/u01/rman_backup/db_fullbackup_%d_%s_%p_%T‘; sql ‘alter system archive log current‘; backup current controlfile format ‘/u01/rman_backup/ctl_%d_%s_%p_%T‘; backup spfile format ‘/u01/rman_backup/spfile_%d_%s_%p_%T‘; release channel ch1; crosscheck backup; crosscheck archivelog all; delete noprompt expired backup; delete noprompt obsolete; }
2.切换生成多个logfile SQL> connect / as sysdba Connected. SQL> archive log list; Database log mode Archive Mode Automatic archival Enabled Archive destination /u01/app/oracle/archive_log Oldest online log sequence 1 Next log sequence to archive 3 Current log sequence 3 SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
SQL> alter system switch logfile;
System altered.
3.模拟手工删除数据一个归档日志 [oracle@localhost archive_log]$ ls -al total 4672 drwxr-xr-x. 2 oracle oinstall 136 Dec 11 03:27 . drwxr-xr-x. 11 oracle oinstall 151 Dec 6 04:18 .. -rw-r-----. 1 oracle oinstall 4765696 Dec 11 03:25 1_2_1026700907.dbf -rw-r-----. 1 oracle oinstall 3072 Dec 11 03:27 1_3_1026700907.dbf -rw-r-----. 1 oracle oinstall 1024 Dec 11 03:27 1_4_1026700907.dbf -rw-r-----. 1 oracle oinstall 1024 Dec 11 03:27 1_5_1026700907.dbf -rw-r-----. 1 oracle oinstall 1024 Dec 11 03:27 1_6_1026700907.dbf [oracle@localhost archive_log]$ rm 1_4_1026700907.dbf
这里我们删除了4这个归档日志
4.可恢复性检查
RMAN> run{ 2> set until sequence 4; ##这里不包含归档日志4 3> restore database preview; 4> }
executing command: SET until clause
Starting restore at 2019-12-11 03:39:43 using channel ORA_DISK_1
List of Backup Sets ===================
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 64 Full 375.04M DISK 00:00:41 2019-12-11 03:24:37 BP Key: 64 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_71_1_20191211 List of Datafiles in backup set 64 File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 1 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/system01.dbf 3 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/sysaux01.dbf 4 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/undotbs01.dbf 7 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/users01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 65 Full 165.62M DISK 00:00:17 2019-12-11 03:24:55 BP Key: 65 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_72_1_20191211 List of Datafiles in backup set 65 Container ID: 2, PDB Name: PDB$SEED File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 5 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/system01.dbf 6 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/sysaux01.dbf 8 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/undotbs01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 67 Full 54.10M DISK 00:00:06 2019-12-11 03:25:28 BP Key: 67 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_74_1_20191211 List of Datafiles in backup set 67 Container ID: 3, PDB Name: ORA12CPDB1 File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 9 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/system01.dbf 11 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/undotbs01.dbf 13 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA13.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 66 Full 115.23M DISK 00:00:14 2019-12-11 03:25:21 BP Key: 66 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_73_1_20191211 List of Datafiles in backup set 66 Container ID: 3, PDB Name: ORA12CPDB1 File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 10 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/sysaux01.dbf 12 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/users01.dbf 14 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA14.dbf
List of Archived Log Copies for database with db_unique_name ORA12C =====================================================================
Key Thrd Seq S Low Time ------- ---- ------- - ------------------- 58 1 2 A 2019-12-11 02:43:10 Name: /u01/app/oracle/archive_log/1_2_1026700907.dbf
59 1 3 A 2019-12-11 03:25:35 Name: /u01/app/oracle/archive_log/1_3_1026700907.dbf
recovery will be done up to SCN 2287678 Media recovery start SCN is 2287488 Recovery must be done beyond SCN 2287536 to clear datafile fuzziness Finished restore at 2019-12-11 03:39:44
说明可以恢复，2和3归档都存在,下面我们验证恢复到归档日志5看下什么情况
RMAN> run{ 2> set until sequence 5; 3> restore database preview; 4> }
executing command: SET until clause
Starting restore at 2019-12-11 03:40:22 using channel ORA_DISK_1
List of Backup Sets ===================
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 64 Full 375.04M DISK 00:00:41 2019-12-11 03:24:37 BP Key: 64 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_71_1_20191211 List of Datafiles in backup set 64 File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 1 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/system01.dbf 3 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/sysaux01.dbf 4 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/undotbs01.dbf 7 Full 2287488 2019-12-11 03:23:56 NO /u01/app/oracle/oradata/ora12c/users01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 65 Full 165.62M DISK 00:00:17 2019-12-11 03:24:55 BP Key: 65 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_72_1_20191211 List of Datafiles in backup set 65 Container ID: 2, PDB Name: PDB$SEED File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 5 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/system01.dbf 6 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/sysaux01.dbf 8 Full 1440734 2019-12-06 03:16:13 NO /u01/app/oracle/oradata/ora12c/pdbseed/undotbs01.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 67 Full 54.10M DISK 00:00:06 2019-12-11 03:25:28 BP Key: 67 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_74_1_20191211 List of Datafiles in backup set 67 Container ID: 3, PDB Name: ORA12CPDB1 File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 9 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/system01.dbf 11 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/undotbs01.dbf 13 Full 2287536 2019-12-11 03:25:22 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA13.dbf
BS Key Type LV Size Device Type Elapsed Time Completion Time ------- ---- -- ---------- ----------- ------------ ------------------- 66 Full 115.23M DISK 00:00:14 2019-12-11 03:25:21 BP Key: 66 Status: AVAILABLE Compressed: YES Tag: TAG20191211T032356 Piece Name: /u01/rman_backup/db_fullbackup_ORA12C_73_1_20191211 List of Datafiles in backup set 66 Container ID: 3, PDB Name: ORA12CPDB1 File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name ---- -- ---- ---------- ------------------- ----------- ------ ---- 10 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/sysaux01.dbf 12 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/users01.dbf 14 Full 2287525 2019-12-11 03:25:07 NO /u01/app/oracle/oradata/ora12c/ora12cpdb1/TPS_DATA14.dbf
no backup of archived log for thread 1 with sequence 4 and starting SCN of 2287678 found to restore ##提示说用到归档日志4，但是我们的归档日志4已经删除了，所以不能恢复到5 List of Archived Log Copies for database with db_unique_name ORA12C =====================================================================
Key Thrd Seq S Low Time ------- ---- ------- - ------------------- 58 1 2 A 2019-12-11 02:43:10 Name: /u01/app/oracle/archive_log/1_2_1026700907.dbf
59 1 3 A 2019-12-11 03:25:35 Name: /u01/app/oracle/archive_log/1_3_1026700907.dbf
recovery will be done up to SCN 2287682 Media recovery start SCN is 2287488 Recovery must be done beyond SCN 2287536 to clear datafile fuzziness Finished restore at 2019-12-11 03:40:22