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recovery 단계

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아카이브 완전 백업

사용자테이블 스페이스를 구성하는 데이터파일이 유실되었때 – 디비를 내리지 않고

recovery

단계 1 정상적인 업부 수행

[oracle@localhost ~]$ sqlplus '/as sysdba'

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug 8 05:58:35 2007 Copyright (c) 1982, 2005, Oracle Corporation. All rights reserved.

Connected to an idle instance.

SQL> startup

ORACLE instance started.

Database opened.

SQL> ed

1 create table hr.jino 2 tablespace users 3 as

4* select * from scott.emp 5 /

Table created.

SQL> select 2 count(*) 3 from hr.jino 4 ;

COUNT(*) --- 14 SQL> commit;

Commit complete.

SQL> alter system checkpoint;

System altered.

단계 2 에러 발생 유저 시스템 스페이스가 날라갔디………..

SQL> host

[oracle@localhost ~]$ rm -rf /u01/app/oracle/oradata/orcl/users01.dbf [oracle@localhost ~]$ exit

exit

몇 번을 강조해도 모자란다. 램에 있는걸 읽기 때문에 개졌는지 모른다.

SQL> select 2 count(*) 3 from hr.jino 4 ;

COUNT(*) --- 14

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단계 3 유실된 파일이 어느 테이블 스페이스에 있는지 확인

SQL> set linesize 132

SQL> col file_name format a40 SQL> select

2 file#

3 ,status 4 ,enabled

5 ,checkpoint_change#

6 ,name

7 from v$datafile 8 ;

oracle/oradata/ora9200/system01.dbf

2 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/undotbs01.dbf

3 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/cwmlite01.dbf

4 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/drsys01.dbf

5 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/example01.dbf

6 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/indx01.dbf

7 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/odm01.dbf

8 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/tools01.dbf

9 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/users01.dbf

10 ONLINE READ WRITE 293319 /u01/app/oracle/oradata/orcl/xdb01.dbf

11 ONLINE READ ONLY 235052 /u01/app/oracle/oradata/orcl/query01.dbf

11 rows selected.

단계 3 유실된 파일이 있는 테이블 스페이스를 off 라인 시킴 나머지는 정상임

SQL> alter database datafile '/u01/app/oracle/oradata/orcl/users01.dbf' offline;

Database altered.

단계 4 복구가 필요하지 않아보는 퀴리 날림

SQL> select

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2 d.file#

3 ,d.name 4 ,d.status 5 ,h.status

6 from v$datafile d, v$datafile_header h 7 where d.file#= h.file#

8 ;

9

/u01/app/oracle/oradata/orcl/users01.dbf RECOVER OFFLINE

11 rows selected.

단계 5 복구 수행 명심 할 것은 지금은 디비는 정상 작동 중이고 유저번 까진 상태

물리적 복구 즉 파일을 갈아치운다.

SQL> host

[oracle@localhost ~]$ cp /oracle/oradata/onbackup/users01.dbf /u01/app/oracle/oradata/orcl/

[oracle@localhost ~]$ exit exit

단계 6 논리적 복구 복원이란 표현이 낳다. 아카이브 파일을 요구한다.

SQL> recover tablespace users;

ORA-00279: change 239781 generated at 08/08/2007 04:07:09 needed for thread 1 ORA-00289: suggestion : /oracle/oradata/archive/arch_4.arc

ORA-00280: change 239781 for thread 1 is in sequence #4

Specify log: {<RET>=suggested | filename | AUTO | CANCEL}

auto

ORA-00279: change 240025 generated at 08/08/2007 04:08:42 needed for thread 1 ORA-00289: suggestion : /oracle/oradata/archive/arch_5.arc

ORA-00280: change 240025 for thread 1 is in sequence #5

ORA-00278: log file '/oracle/oradata/archive/arch_4.arc' no longer needed for this recovery

ORA-00279: change 241925 generated at 08/08/2007 04:19:49 needed for thread 1 ORA-00289: suggestion : /oracle/oradata/archive/arch_6.arc

ORA-00280: change 241925 for thread 1 is in sequence #6

ORA-00278: log file '/oracle/oradata/archive/arch_5.arc' no longer needed for this recovery

Log applied.

Media recovery complete.  다 끝났다는 이야기이다.

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SQL>

단계 7 더 복구할 파일이 있는지 상태 확인

SQL> select 2 *

3 from v$recover_file;

no rows selected

단계 8 파일 및 현재 상태 확인

SQL>

SQL> r 1 select 2 file#

3 ,status 4 ,enabled

5 ,checkpoint_change#

6 ,name

7* from v$datafile

9 OFFLINE READ WRITE 294000 /u01/app/oracle/oradata/orcl/users01.dbf

11 rows selected.

SQL> ed

Wrote file afiedt.buf 1 select

2 d.file#

3 ,d.name 4 ,d.status 5 ,h.status

6 from v$datafile d, v$datafile_header h 7* where d.file#= h.file#

8 /

9

/u01/app/oracle/oradata/orcl/users01.dbf OFFLINE OFFLINE

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단계 9 테이블 스페이스를 온라인 시킴

SQL> alter database datafile '/u01/app/oracle/oradata/orcl/users01.dbf' online;

Database altered.

단계 10 값 확인

SQL> select 2 count(*) 3 from hr.jino 4 ;

COUNT(*) --- 14

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