Oracle12c RAC RMAN异机恢复

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#编辑pfile文件initspdb.ora

vi /oracle/app/oracle/product/12.2.0/db_1/dbs/initspdb.ora

audit_file_dest=‘/oracle/app/oracle/admin/spdb/adump‘
audit_trail=‘db‘
compatible=‘12.2.0‘
control_files=‘/oracle/app/oracle/oradata/spdb/control.ctl‘
db_block_size=8192
db_name=‘spdb‘
diagnostic_dest=‘/oracle/app/oracle‘
dispatchers=‘(PROTOCOL=TCP) (SERVICE=spdbXDB)‘
enable_pluggable_database=true
log_archive_dest_1=‘LOCATION=/orabak/archivelog‘
open_cursors=300
pga_aggregate_target=5120m
processes=400
remote_login_passwordfile=‘exclusive‘
sga_target=10240m
undo_tablespace=‘UNDOTBS1‘
db_file_name_convert=‘+DATADG/SPDB/DATAFILE‘,‘/oracle/app/oracle/oradata/spdb/‘,‘+DATADG/SPDB/8E80F930196B6100E053E200A8C0AF9F/DATAFILE‘,‘/oracle/app/oracle/oradata/spdb/pdbseed/‘,‘+DATADG/SPDB/8E81C7A967C43CB7E053E300A8C06223/DATAFILE‘,‘/oracle/app/oracle/oradata/spdb/spdb1pdb/‘,‘+DATADG/SPDB/93BFEF75138BC79EE053E300A8C08BA1/DATAFILE‘,‘/oracle/app/oracle/oradata/spdb/kdlxpdb

#创建目录

mkdir -p /oracle/app/oracle/admin/spdb/adump

mkdir -p /orabak/archivelog

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#创建spfile

SQL> create spfile from pfile=‘/oracle/app/oracle/product/12.2.0/db_1/dbs/initspdb.ora‘

#进到nomount状态

SQL> startup nomount

--#恢复spfile文件

--RMAN> restore spfile from ‘/orabak/spfile_ORCL_1026474723_1096_1‘;

SQL> shutdown abort

cd /oracle/app/oracle/product/12.2.0/db_1/dbs/

rm initspdb.ora

$strings spfilespdb.ora

SQL> startup nomount

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#恢复control文件

RMAN> restore controlfile from ‘/orabak/control_ORCL_1026474721_1095_1‘;

#进到mount状态

SQL> alter database mount;

#删除backup

RMAN> list backup;

RMAN> crosscheck backup;

RMAN> delete backup;

RMAN> list backup;

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#恢复dbfile全备文件

RMAN> catalog start with ‘/orabak/backup/‘;

RMAN> list backup;

RMAN> recover database;

#recover报错，需要指定SCN

RMAN> recover database until scn 233086903;　　　　　　#全量备份的SCN

#将归档日志及增量备份数据文件拷贝至/orabak/backup/目录并追加

RMAN> catalog start with ‘/orabak/backup/‘;

RMAN> list backup;

#找到对应增量备份节点的SCN进行恢复，建议根据备份策略依次恢复（优先读取增量文件其次归档日志）。

RMAN> recover database until scn 234809384;　　　　　　#归档日志恢复第一天增量

RMAN> recover database until scn 237672420;　　　　#增量文件及归档日志恢复第二天增量

#第二天增量恢复完成，接着恢复第三天增量报错。备份期间生成过数据文件，可通过恢复单独数据文件恢复，因隔天忘记恢复第三天增量数据。

RMAN> recover database until scn 241710899;　　　　　　#第三天增量恢复

RMAN> restore datafile 31; 

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#数据库open

SQL> alter database open;

SQL> alter database open resetlogs;

#ASM磁盘和集群报错，需要调整控制文件

SQL> alter database backup controlfile to trace as ‘/home/oracle/ctl.control‘;

SQL> shutdown abort;

vi /home/oracle/ctl.control

STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "SPDB" RESETLOGS ARCHIVELOG
    MAXLOGFILES 192
    MAXLOGMEMBERS 3
    MAXDATAFILES 1024
    MAXINSTANCES 32
    MAXLOGHISTORY 584
LOGFILE
  GROUP 1 ‘/oracle/app/oracle/oradata/spdb/redo1.log‘  SIZE 200M BLOCKSIZE 512,
  GROUP 2 ‘/oracle/app/oracle/oradata/spdb/redo2.log‘  SIZE 200M BLOCKSIZE 512
-- STANDBY LOGFILE
DATAFILE
  ‘/oracle/app/oracle/oradata/spdb/system.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/pdbseed/system.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/sysaux.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/pdbseed/sysaux.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/undotbs1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/pdbseed/undotbs1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/undotbs2.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/users.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/system.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/sysaux.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/undotbs1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/undo_2.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/users.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/spdata1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/spdata2.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/managedata1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/clouddata1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/managedata2.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/clouddata2.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/cloudtestdata1.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/spdb1pdb/cloudtestdata2.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/kdlxpdb/system.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/kdlxpdb/sysaux.dbf‘,
  ‘/oracle/app/oracle/oradata/spdb/kdlxpdb/undotbs1.dbf‘
CHARACTER SET AL32UTF8
;
--RECOVER DATABASE

--All logs need archiving and a log switch is needed.
--ALTER SYSTEM ARCHIVE LOG ALL;-- Database can now be opened normally.
--ALTER DATABASE OPEN;

-- Open all the PDBs.
--ALTER PLUGGABLE DATABASE ALL OPEN;

#编辑控制文件，重新生成控制文件

SQL> @/home/oracle/ctl.control

SQL> alter database open RESETLOGS;

#生成thread 2 redo日志文件

SQL> ALTER DATABASE ADD LOGFILE THREAD 2 GROUP 3 ‘/oracle/app/oracle/oradata/spdb/redo03.log‘ SIZE 50M,GROUP 4 ‘/oracle/app/oracle/oradata/spdb/redo04.log‘ SIZE 50M;

SQL> alter database open RESETLOGS;

SQL> alter database open;

SQL> alter pluggable database all open;

至此RAC的RMAN异机恢复就完成了。恢复过程中遇到问题就针对解决吧，Good Luck！！!

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注常用命令：

RMAN> list backup；

RMAN> crosscheck backupset;

RMAN> delete backupset;

RMAN> delete backup;

RMAN> restore database;

RMAN> restore datafile 31; 

RMAN> recover database until SCN XXX;

RMAN> list archivelog all;

RMAN> list copy;

RMAN> catalog start with ‘/orabak/backup‘;