Oracle 冷備份詳解【實戰案例】

Oracle 冷備份詳解

--準備工做
select * from v$database;
select file_name from dba_data_files;

create tablespace inv datafile '/oradata/ocm/inv01.dbf' size 2048M;
create user inv identified by inv default tablespace inv temporary tablespace temp;
grant dba,resource to inv;

alter user scott account unlock;
SQL> conn scott/tiger
select * from tab;
select 'create table '||tname||' as select * from scott.'||tname||';' from tab;

create table BONUS as select * from scott.BONUS;
create table DEPT as select * from scott.DEPT;
create table EMP as select * from scott.EMP;
create table SALGRADE as select * from scott.SALGRADE;

create table te_objects as select * from dba_objects;


--oracle冷備份


select instance_name,version,status,archiver,database_status from v$instance;
select dbid,name,log_mode from v$database;

--須要備份文件包括：
/*
 數據文件，聯機重作日誌文件，控制文件，臨時文件，參數文件，密碼文件，監聽文件，tnsnames文件，sqlnet文件
*/

--執行語句準備
select 'cp '|| name ||' /ggs/backup/cold_back' from v$datafile
union all
select 'cp '|| name ||' /ggs/backup/cold_back' from v$tempfile
union all
select 'cp '|| member ||' /ggs/backup/cold_back' from v$logfile
union all
select 'cp '|| name ||' /ggs/backup/cold_back' from v$controlfile;

--注：使用以上SQL生成的Linux命令進行執行，以下：
cp /oradata/ocm/system01.dbf /ggs/backup/cold_back
cp /oradata/ocm/sysaux01.dbf /ggs/backup/cold_back
cp /oradata/ocm/undotbs01.dbf /ggs/backup/cold_back
cp /oradata/ocm/users01.dbf /ggs/backup/cold_back
cp /oradata/ocm/ogg.dbf /ggs/backup/cold_back
cp /oradata/ocm/inv01.dbf /ggs/backup/cold_back
cp /oradata/ocm/temp01.dbf /ggs/backup/cold_back
cp /oradata/ocm/redo04a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo04b.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo03a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo03b.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo02a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo02b.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo01a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo01b.rdo /ggs/backup/cold_back
cp /oradata/ocm/control01.ctl /ggs/backup/cold_back
cp /oradata/ocm/control02.ctl /ggs/backup/cold_back
cp /oradata/ocm/control03.ctl /ggs/backup/cold_back

create pfile='/ggs/backup/cold_back/dbs/initocm.ora' from spfile;
cp $ORACLE_HOME/dbs/orapwocm  /ggs/backup/cold_back/dbs/
cp $ORACLE_HOME/network/admin/  /ggs/backup/cold_back/admin/


--關閉數據庫
alter system archive log all;
shutdown immediate;

--執行代碼
cp /oradata/ocm/system01.dbf /ggs/backup/cold_back
cp /oradata/ocm/sysaux01.dbf /ggs/backup/cold_back
cp /oradata/ocm/undotbs01.dbf /ggs/backup/cold_back
cp /oradata/ocm/users01.dbf /ggs/backup/cold_back
cp /oradata/ocm/ogg.dbf /ggs/backup/cold_back
cp /oradata/ocm/inv01.dbf /ggs/backup/cold_back
cp /oradata/ocm/temp01.dbf /ggs/backup/cold_back
cp /oradata/ocm/redo04a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo04b.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo03a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo03b.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo02a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo02b.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo01a.rdo /ggs/backup/cold_back
cp /oradata/ocm/redo01b.rdo /ggs/backup/cold_back
cp /oradata/ocm/control01.ctl /ggs/backup/cold_back
cp /oradata/ocm/control02.ctl /ggs/backup/cold_back
cp /oradata/ocm/control03.ctl /ggs/backup/cold_back

cp $ORACLE_HOME/dbs/orapwocm  /ggs/backup/cold_back/dbs/
cp -r $ORACLE_HOME/network/admin/  /ggs/backup/cold_back/


--啓動數據庫
sqlplus / as sysdba
startup

【冷備份的優勢和缺點】

01、優勢冷備模式下概念易於理解，即將須要備份的文件複製到安全的位置操做比較簡單，不須要太多的干預容易恢復到某個時間點上(只需將文件再拷貝回去)能與歸檔方法相結合，做數據庫「最新狀態」的恢復。

02、缺點 備份時，數據庫必須處於一致性關閉狀態 只能提供到某一時間點的恢復 備份時速度比較慢，尤爲是數據量大性能影響比較大 不能實現基於表和用戶級別的數據恢復。