안녕? 나야 :)

■ Log Miner (로그 마이너) 1) redo log file에 있는 내용을 추출해서 SQL문장으로 변환해 주는 유틸리티, 프로그램 2) Oracle DB 에서 변경 로그를 분석하고 조회하는 기능을 제공하는 도구 3) 데이터 변경 추적(특정 테이블이나 세그먼트에 대한 변경 내용 추적), 데이터 비교(두 시점 간의 데이터 변경 비교+ 변경된 내용을 확인), 데이터 검증(변경된 데이터의 유효성 검증, 오류나 불인치 확인) 등의 용도의 목적 # 기본값은 비활성화 select supplemental_log_data_min from v$database; # 활성화 시키기 alter database add supplemental log data; # 활성화 select supplemental_log_data_..

■ 복제 Database 운영 data file, redo log file을 이용해서 DB를 생성 # backup 본 위치 확인 [oracle1@oracle ~]$ cd backup/arch/cold_20240117 [oracle1@oracle cold_20240117]$ ls backup.log data01.dbf insa_tbs01.dbf redo09.log temp01.dbf backup.sh example01.dbf redo07.log sysaux01.dbf undo01.dbf control01.ctl initora11g_20240117.ora redo08.log system01.dbf users01.dbf [oracle1@oracle cold_20240117]$ pwd /home/oracle1/..

# 테이블 스페이스 생성 SQL> create tablespace insa_tbs datafile '/u01/app/oracle/oradata/ora11g/insa_tbs01.dbf' size 10m autoextend on next 1m maxsize 20m extent management local uniform size 1m segment space management auto; # 확인 select a.file#, a.name file_name, b.name file_name, b.name tbs_name, a.status, a.checkpoint_change# from v$datafile a, v$tablespace b where a.ts# = b.ts#; # trace 생성 SQL> alter..

SQL> select * from v$log; GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC ---------- ---------- ---------- ---------- ---------- ---------- --- STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME ---------------- ------------- --------- ------------ --------- 7 1 1 104857600 512 1 NO CURRENT 837442 18-JAN-24 2.8147E+14 8 1 0 104857600 512 1 YES UNUSED 0 0 9 1 0 104857600 512 1 YES UNUSED ..

SQL> select * from v$log; GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC ---------- ---------- ---------- ---------- ---------- ---------- --- STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME ---------------- ------------- --------- ------------ --------- 7 1 1 104857600 512 1 NO CURRENT 834109 18-JAN-24 2.8147E+14 8 1 0 104857600 512 1 YES UNUSED 0 0 9 1 0 104857600 512 1 YES UNUSED ..

1. 테이블 생성 create table hr.new_202401 as select * from hr.employees; 2) 조회 SELECT f.file_name FROM dba_extents e, dba_data_files f WHERE f.file_id = e.file_id AND e.segment_name = 'NEW_202401' AND e.owner='HR'; => users01 TBS에 저장됨 2. 장애발생 SQL> ! rm /home/oracle/arch1/*.* SQL> ! rm /home/oracle/arch2/*.* SQL> ! rm /u01/app/oracle/oradata/ora11g/users01.dbf --> user01 TBS, 아카이브정보 삭제 3. 가정) 업무때문에 DB..

[oracle1@oracle ~]$ cd arch1 [oracle1@oracle arch1]$ ls arch_1_1_1158542235.arc arch_1_3_1158542235.arc arch_1_5_1158542235.arc arch_1_2_1158542235.arc arch_1_4_1158542235.arc arch_1_6_1158542235.arc [oracle1@oracle arch1]$ rm *.* [oracle1@oracle arch1]$ ls SQL> select * from v$log; SQL> select a.file#, a.name file_name, b.name file_name, b.name tbs_name, a.status, a.checkpoint_change# from v$da..

=> 백업 완료 SQL> select * from v$log; SQL> select a.file#, a.name file_name, b.name file_name, b.name tbs_name, a.status, a.checkpoint_change# from v$datafile a, v$tablespace b where a.ts# = b.ts#; SQL> drop table hr.emp_50 purge; SQL> create table hr.emp_50 as select * from hr.employees where department_id = 50; SQL> select count(*) from hr.emp_50; SQL> select * from v$log; SQL> alter system switc..

[oracle1@oracle cold_20240117]$ ls [oracle1@oracle cold_20240117]$ pwd /home/oracle1/backup/arch/cold_20240117/ SQL> select * from v$log; SQL> select a.file#, a.name file_name, b.name file_name, b.name tbs_name, a.status, a.checkpoint_change# from v$datafile a, v$tablespace b where a.ts# = b.ts#; SQL> create table hr.emp_50 as select * from hr.employees where department_id = 50; SQL> select coun..

SQL> select * from v$log; select a.file#, a.name file_name, b.name file_name, b.name tbs_name, a.status, a.checkpoint_change# from v$datafile a, v$tablespace b where a.ts# = b.ts#; # 테이블 생성 및 확인 SQL> create table hr.emp_30 as select * from hr.employees where department_id = 30; SQL> select count(*) from hr.emp_30; # 장애 발생 # => control01.ctl 지우기, log switch 발생 SQL> ! rm /u01/app/oracle/oradata/or..