Rman Restore Tablespace trong khi mất datafile và không có datafile backup Oracle Database 19c

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Bài viết này sẽ hướng dẫn bạn cách khôi phục lại datafile, tablespace bị mất datafile do lỗi OS hoặc vì lý do nào đó, trong khi chúng ta chưa có backup datafile mất đó.

Các công việc thực hiện:

  • Tạo tablespace
  • Tạo backup ban đầu
  • Thêm mới datafile vào tbs nhưng không thực hiện backup
  • Tạo table và insert data
  • Xoá 2 datafiles trong tbs vừa tao bên trên trong OS level (lúc này sẽ lỗi vì tbs ko có datafile để đọc)
  • Offline tbs vừa tạo
  • Check thông tin trong rman datafile lỗi
  • Restore và Recover TBS
  • TBS online và check dữ liệu

oracle rman plugin Archives - SysDBASoft IT

Tạo tablespace:

create tablespace duongtbs datafile '/u01/app/oracle/oradata/DUODB/datafile/duongtbs01.dbf' size 100M;

SQL> create tablespace duongtbs datafile ‘/u01/app/oracle/oradata/DUODB/datafile/duongtbs01.dbf’ size 100M;

Tablespace created.

Tạo bản backup:

exit

rman target /

backup database plus archivelog;

[oracle@srv1 ~]$ rman target /

Recovery Manager: Release 19.0.0.0.0 – Production on Fri May 10 22:44:50 2024

Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.

connected to target database: DUODB (DBID=381617332)

RMAN> backup database plus archivelog;

Starting backup at 10-MAY-24

current log archived

using target database control file instead of recovery catalog

Thêm datafile mới cho TBS:

exit

sqlplus / as sysdba

alter tablespace duongtbs add datafile '/u01/app/oracle/oradata/DUODB/datafile/duongtbs02.dbf' size 100m;

SQL> alter tablespace duongtbs add datafile ‘/u01/app/oracle/oradata/DUODB/datafile/duongtbs02.dbf’ size 100m;

Tablespace altered.

SQL> select file_name from dba_data_files where tablespace_name like ‘DUONGTBS’;

FILE_NAME

——————————————————————————–

/u01/app/oracle/oradata/DUODB/datafile/duongtbs01.dbf

/u01/app/oracle/oradata/DUODB/datafile/duongtbs02.dbf

Kiểm tra datafile trong TBS và tiến hành switch logfile:

select file_name from dba_data_files where tablespace_name like 'DUONGTBS';

alter system switch logfile;

alter system switch logfile;

SQL> alter system switch logfile;

alter system switch logfile;

System altered.

Tạo table và insert data:

create table tab1(col1 number) tablespace DUONGTBS;

insert into tab1 values (1);

insert into tab1 values (2);

commit;

SQL> create table tab1(col1 number) tablespace DUONGTBS;

Table created.

SQL> insert into tab1 values (1);

1 row created.

SQL> insert into tab1 values (2);

1 row created.

SQL> commit;

Commit complete.

Xoá datafile của TBS bên trên:

exit

cd /u01/app/oracle/oradata/DUODB/datafile

ls -lha

rm duongtbs*

[oracle@srv1 ~]$ cd /u01/app/oracle/oradata/DUODB/datafile

[oracle@srv1 datafile]$ ls -lha

total 2.1G

drwxr-x—. 2 oracle oinstall 4.0K May 10 22:47 .

drwxr-x—. 5 oracle oinstall 58 May 4 06:13 ..

-rw-r—–. 1 oracle oinstall 101M May 10 22:45 duongtbs01.dbf

-rw-r—–. 1 oracle oinstall 101M May 10 22:47 duongtbs02.dbf

-rw-r—–. 1 oracle oinstall 601M May 10 22:48 o1_mf_sysaux_m3bvvyk8_.dbf

-rw-r—–. 1 oracle oinstall 911M May 10 22:45 o1_mf_system_m3bvtvd1_.dbf

-rw-r—–. 1 oracle oinstall 33M May 10 22:00 o1_mf_temp_m3bvyjgk_.tmp

-rw-r—–. 1 oracle oinstall 346M May 10 22:45 o1_mf_undotbs1_m3bvwqpc_.dbf

-rw-r—–. 1 oracle oinstall 5.1M May 10 22:45 o1_mf_users_m3bvwrsm_.dbf

[oracle@srv1 datafile]$ rm duongtbs*

[oracle@srv1 datafile]$ ls -lha

total 1.9G

drwxr-x—. 2 oracle oinstall 4.0K May 10 22:48 .

drwxr-x—. 5 oracle oinstall 58 May 4 06:13 ..

-rw-r—–. 1 oracle oinstall 601M May 10 22:48 o1_mf_sysaux_m3bvvyk8_.dbf

-rw-r—–. 1 oracle oinstall 911M May 10 22:45 o1_mf_system_m3bvtvd1_.dbf

-rw-r—–. 1 oracle oinstall 33M May 10 22:00 o1_mf_temp_m3bvyjgk_.tmp

-rw-r—–. 1 oracle oinstall 346M May 10 22:45 o1_mf_undotbs1_m3bvwqpc_.dbf

-rw-r—–. 1 oracle oinstall 5.1M May 10 22:45 o1_mf_users_m3bvwrsm_.dbf

Offline TBS:

sqlplus / as sysdba

alter tablespace duongtbs offline;

alter tablespace duongtbs offline immediate;

select file_id,file_name from dba_data_files where tablespace_name like 'DUONGTBS';

SQL> alter tablespace duongtbs offline;

alter tablespace duongtbs offline

*

ERROR at line 1:

ORA-01116: error in opening database file 5

ORA-01110: data file 5: ‘/u01/app/oracle/oradata/DUODB/datafile/duongtbs01.dbf’

ORA-27041: unable to open file

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

SQL> alter tablespace duongtbs offline immediate;

Tablespace altered.

SQL> set lines 300

SQL> /

FILE_ID FILE_NAME

———- ———————————————————————-

5 /u01/app/oracle/oradata/DUODB/datafile/duongtbs01.dbf

2 /u01/app/oracle/oradata/DUODB/datafile/duongtbs02.dbf

Kiểm tra trạng thái datafile của TBS bên trên (chúng ta thấy có 2 datafile có ID là 2 và 5):

exit

rman target /

list backup of datafile 2;

list backup of datafile 5;

RMAN> list backup of datafile 2;

using target database control file instead of recovery catalog

specification does not match any backup in the repository

RMAN> list backup of datafile 5;

List of Backup Sets

===================

BS Key Type LV Size Device Type Elapsed Time Completion Time

——- —- — ———- ———– ———— —————

54 Full 1.21G DISK 00:00:06 10-MAY-24

BP Key: 54 Status: AVAILABLE Compressed: NO Tag: TAG20240510T224520

Piece Name: /u01/app/oracle/fast_recovery_area/DUODB/backupset/2024_05_10/o1_mf_nnndf_TAG20240510T224520_m3wj8k05_.bkp

List of Datafiles in backup set 54

File LV Type Ckp SCN Ckp Time Abs Fuz SCN Sparse Name

—- — —- ———- ——— ———– —— —-

5 Full 2379035 10-MAY-24 NO /u01/app/oracle/oradata/DUODB/datafile/duongtbs01.dbf

=> trong backup piece ban đầu thì chúng ta có datafile 5, còn file 2 thì tạo sau khi backup nên không có trong backup piece.

Restore và Recover TBS:

restore tablespace DUONGTBS;

recover tablespace DUONGTBS;

RMAN> restore tablespace DUONGTBS;

Starting restore at 10-MAY-24

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=275 device type=DISK

allocated channel: ORA_DISK_2

channel ORA_DISK_2: SID=278 device type=DISK

allocated channel: ORA_DISK_3

channel ORA_DISK_3: SID=44 device type=DISK

allocated channel: ORA_DISK_4

channel ORA_DISK_4: SID=279 device type=DISK

allocated channel: ORA_DISK_5

channel ORA_DISK_5: SID=45 device type=DISK

RMAN> recover tablespace DUONGTBS;

Starting recover at 10-MAY-24

using channel ORA_DISK_1

using channel ORA_DISK_2

using channel ORA_DISK_3

using channel ORA_DISK_4

using channel ORA_DISK_5

using channel ORA_DISK_6

using channel ORA_DISK_7

using channel ORA_DISK_8

using channel ORA_DISK_9

using channel ORA_DISK_10

starting media recovery

archived log for thread 1 with sequence 2 is already on disk as file /u01/app/oracle/fast_recovery_area/DUODB/archivelog/2024_05_10/o1_mf_1_2_m3wj8r1l_.arc

archived log for thread 1 with sequence 3 is already on disk as file /u01/app/oracle/fast_recovery_area/DUODB/archivelog/2024_05_10/o1_mf_1_3_m3wjfbl2_.arc

archived log for thread 1 with sequence 4 is already on disk as file /u01/app/oracle/fast_recovery_area/DUODB/archivelog/2024_05_10/o1_mf_1_4_m3wjfbln_.arc

archived log file name=/u01/app/oracle/fast_recovery_area/DUODB/archivelog/2024_05_10/o1_mf_1_2_m3wj8r1l_.arc thread=1 sequence=2

media recovery complete, elapsed time: 00:00:00

Finished recover at 10-MAY-24

Online TBS và check status:

select tablespace_name,status from dba_tablespaces;

alter tablespace duongtbs online;

select tablespace_name,status from dba_tablespaces;

select * from tab1;

RMAN> select tablespace_name,status from dba_tablespaces;

TABLESPACE_NAME STATUS

—————————— ———

SYSTEM ONLINE

SYSAUX ONLINE

UNDOTBS1 ONLINE

TEMP ONLINE

USERS ONLINE

DUONGTBS OFFLINE

RMAN> alter tablespace duongtbs online;

Statement processed

RMAN> select tablespace_name,status from dba_tablespaces;

TABLESPACE_NAME STATUS

—————————— ———

SYSTEM ONLINE

SYSAUX ONLINE

UNDOTBS1 ONLINE

TEMP ONLINE

USERS ONLINE

DUONGTBS ONLINE

RMAN> select * from tab1;

COL1

———-

1

2

DataFiles đã xuất thiện sau khi restore => hệ thống tự động tạo lại datafile từ backup piece và archivelog:

[oracle@srv1 log]$ cd /u01/app/oracle/oradata/DUODB/datafile

[oracle@srv1 datafile]$ ls -lha

total 2.1G

drwxr-x—. 2 oracle oinstall 4.0K May 10 22:53 .

drwxr-x—. 5 oracle oinstall 58 May 4 06:13 ..

-rw-r—–. 1 oracle oinstall 101M May 10 22:54 duongtbs01.dbf

-rw-r—–. 1 oracle oinstall 101M May 10 22:54 duongtbs02.dbf

-rw-r—–. 1 oracle oinstall 601M May 10 22:54 o1_mf_sysaux_m3bvvyk8_.dbf

-rw-r—–. 1 oracle oinstall 911M May 10 22:54 o1_mf_system_m3bvtvd1_.dbf

-rw-r—–. 1 oracle oinstall 33M May 10 22:00 o1_mf_temp_m3bvyjgk_.tmp

-rw-r—–. 1 oracle oinstall 346M May 10 22:54 o1_mf_undotbs1_m3bvwqpc_.dbf

-rw-r—–. 1 oracle oinstall 5.1M May 10 22:53 o1_mf_users_m3bvwrsm_.dbf

Chúc các bạn thành công.

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