RAC数据库的RMAN备份异机如何恢复到单节点数据库

网友投稿 375 2023-12-10

RAC数据库的RMAN备份异机如何恢复到单节点数据库

RAC数据库的RMAN备份异机如何恢复到单节点数据库，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。

1、首先在rac环境用rman备份数据库。

[oracle@rac1 admin]$ rman target /

run

{

allocate channel c1 device type disk connect sys/welcome123@IRAC1;

allocate channel c2 device type disk connect sys/welcome123@IRAC2;

backup AS COMPRESSED BACKUPSET incremental level= 0 Database format=/u01/app/oracle/backup/full_%U_%T tag=fullbackup;

sql alter system archive log current;

backup archivelog all tag=arc_bak format=/u01/app/oracle/backup/arch_%U_%T delete input;

backup current controlfile tag=bak_ctlfile format=/u01/app/oracle/backup/ctl_file_%U_%T;

backup spfile tag=spfile format=/u01/app/oracle/backup/spfile_%U_%T;

release channel c2;

release channel c1;

}

备份过程中出现如下报错

released channel: c1

released channel: c2

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03009: failure of backup command on c1 channel at 08/25/2017 17:19:41

ORA-00245: control file backup failed; target is likely on a local file system

处理方法如下，在RAC环境运行如下命令：

RMAN>show snapshot controlfile name;

RMAN>CONFIGURE SNAPSHOT CONTROLFILE NAME TO +DATA/IRAC/CONTROLFILE/snapcf_IRAC.f;

处理后备份成功。

2、将rac环境的rman备份拷贝到单机(注意需要从rac的节点二上拷贝一部分来)。并就rac环境pfile copy到单机,根据单机主机资源，修改集群参数，实例名，文件路径以及sga和pga等参数。修改如下:

*.audit_file_dest=/u01/oracle/admin/IRAC/adump

*.audit_trail=db

*.compatible=11.2.0.0.0

*.control_files=/u01/oracle/oradata/IRAC/control01.dbf,/u01/oracle/oradata/IRAC/control02.dbf

*.db_block_size=8192

*.db_create_file_dest=/u01/oracle/oradata/IRAC/

*.db_name=IRAC

*.db_recovery_file_dest=/u01/oracle/

*.db_recovery_file_dest_size=4558159872

*.diagnostic_dest=/u01/oracle

*.dispatchers=(PROTOCOL=TCP) (SERVICE=IRACXDB)

*.log_archive_dest_1=location=/u01/oracle/archive

*.open_cursors=300

*.pga_aggregate_target=100m

*.processes=150

*.remote_login_passwordfile=exclusive

*.sga_target=400m

IRAC.undo_tablespace=UNDOTBS1

3、用pfile将数据库启动到nomount

export ORACLE_SID=IRAC

[orapre@ouc backup]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Sun Aug 27 19:06:40 2017

Connected to an idle instance.

SQL> startup nomount pfile=/u01/backup/1.ora;

ORACLE instance started.

Total System Global Area 417546240 bytes

Fixed Size 2228944 bytes

Variable Size 134221104 bytes

Database Buffers 272629760 bytes

Redo Buffers 8466432 bytes

SQL>

4、restore 控制文件。

restore controlfile from /u01/backup/ctl_file_18sd1hv3_1_1_20170828;

[orapre@ouc backup]$ rman target /

Recovery Manager: Release 11.2.0.3.0 - Production on Sun Aug 27 20:48:13 2017

connected to target database: IRAC (not mounted)

RMAN> restore controlfile from /u01/backup/ctl_file_18sd1hv3_1_1_20170828;

Starting restore at 27-AUG-17

using target database control file instead of recovery catalog

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=134 device type=DISK

channel ORA_DISK_1: restoring control file

channel ORA_DISK_1: restore complete, elapsed time: 00:00:07

output file name=/u01/oracle/oradata/IRAC/control01.dbf

output file name=/u01/oracle/oradata/IRAC/control02.dbf

Finished restore at 27-AUG-17

RMAN>

5、restore 数据文件、归档。

alter database mount;

catalog start with /u01/backup;

run{

allocate channel c1 device type disk;

allocate channel c2 device type disk;

set newname for datafile 1 to /u01/oracle/oradata/IRAC/system.dbf;

set newname for datafile 2 to /u01/oracle/oradata/IRAC/sysaux.dbf;

set newname for datafile 3 to /u01/oracle/oradata/IRAC/undotbs1.dbf;

set newname for datafile 4 to /u01/oracle/oradata/IRAC/users.dbf;

set newname for datafile 5 to /u01/oracle/oradata/IRAC/undotbs2.dbf;

set newname for datafile 6 to /u01/oracle/oradata/IRAC/example.dbf;

restore database;

switch datafile all;

release channel c1;

release channel c2;

}

RMAN> list backup of archivelog all;

List of Backup Sets

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

BS Key Size

------- ----------

35 4.81M

List of Archived Logs in backup set 35

Thrd Seq Low SCN Low Time Next SCN Next Time

---- ------- ---------- --------- ---------- ---------

1 41 3183645 28-AUG-17 3209549 28-AUG-17

2 30 3183649 28-AUG-17 3209517 28-AUG-17

Backup Set Copy #1 of backup set 35

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 28-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 35 Copy #1

BP Key Pc# Status Piece Name

------- --- ----------- ----------

35 1 EXPIRED /u01/app/oracle/backup/arch_14sd1hv1_1_1_20170828

Backup Set Copy #2 of backup set 35

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 27-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 35 Copy #2

BP Key Pc# Status Piece Name

------- --- ----------- ----------

44 1 AVAILABLE /u01/backup/arch_14sd1hv1_1_1_20170828

BS Key Size

------- ----------

36 1.68M

List of Archived Logs in backup set 36

Thrd Seq Low SCN Low Time Next SCN Next Time

---- ------- ---------- --------- ---------- ---------

1 42 3209549 28-AUG-17 3216276 28-AUG-17

2 31 3209517 28-AUG-17 3209519 28-AUG-17

Backup Set Copy #1 of backup set 36

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 28-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 36 Copy #1

BP Key Pc# Status Piece Name

------- --- ----------- ----------

36 1 EXPIRED /u01/app/oracle/backup/arch_15sd1hv2_1_1_20170828

Backup Set Copy #2 of backup set 36

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 27-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 36 Copy #2

BP Key Pc# Status Piece Name

------- --- ----------- ----------

43 1 AVAILABLE /u01/backup/arch_15sd1hv2_1_1_20170828

BS Key Size

------- ----------

37 1.85M

List of Archived Logs in backup set 37

Thrd Seq Low SCN Low Time Next SCN Next Time

---- ------- ---------- --------- ---------- ---------

2 32 3209656 28-AUG-17 3216272 28-AUG-17

2 33 3216272 28-AUG-17 3216288 28-AUG-17

Backup Set Copy #1 of backup set 37

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 28-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 37 Copy #1

BP Key Pc# Status Piece Name

------- --- ----------- ----------

37 1 EXPIRED /u01/app/oracle/backup/arch_16sd1hut_1_1_20170828

Backup Set Copy #2 of backup set 37

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 27-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 37 Copy #2

BP Key Pc# Status Piece Name

------- --- ----------- ----------

47 1 AVAILABLE /u01/backup/arch_16sd1hut_1_1_20170828

BS Key Size

------- ----------

38 2.00K

List of Archived Logs in backup set 38

Thrd Seq Low SCN Low Time Next SCN Next Time

---- ------- ---------- --------- ---------- ---------

1 43 3216276 28-AUG-17 3216284 28-AUG-17

Backup Set Copy #1 of backup set 38

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 28-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 38 Copy #1

BP Key Pc# Status Piece Name

------- --- ----------- ----------

38 1 EXPIRED /u01/app/oracle/backup/arch_17sd1hv2_1_1_20170828

Backup Set Copy #2 of backup set 38

Device Type Elapsed Time Completion Time Compressed Tag

----------- ------------ --------------- ---------- ---

DISK 00:00:00 27-AUG-17 NO ARC_BAK

List of Backup Pieces for backup set 38 Copy #2

BP Key Pc# Status Piece Name

------- --- ----------- ----------

42 1 AVAILABLE /u01/backup/arch_17sd1hv2_1_1_20170828

RMAN>restore archivelog sequence between 30 and 33 thread 2;

RMAN>restore archivelog sequence between 41 and 43 thread 1;

6、打开数据库

SQL> recover database using backup controlfile until cancel;

ORA-00279: change 3216190 generated at 08/28/2017 11:38:07 needed for thread 1

ORA-00289: suggestion : /u01/oracle/archive/1_42_951416315.dbf

ORA-00280: change 3216190 for thread 1 is in sequence #42

Specify log: {=suggested | filename | AUTO | CANCEL}

AUTO

>recover出现报错，直接常识open resetlogs

open resetlog之前需要对redolog重命名

alter database rename file +DATA/irac/onlinelog/group_2.264.951416317 to /u01/oracle/oradata/IRAC/redo01.dbf;

alter database rename file +DATA/irac/onlinelog/group_2.265.951416317 to /u01/oracle/oradata/IRAC/redo02.dbf;

alter database rename file +DATA/irac/onlinelog/group_1.262.951416315 to /u01/oracle/oradata/IRAC/redo03.dbf;

alter database rename file +DATA/irac/onlinelog/group_1.263.951416317 to /u01/oracle/oradata/IRAC/redo04.dbf;

alter database rename file +DATA/irac/onlinelog/group_3.268.951416437 to /u01/oracle/oradata/IRAC/redo05.dbf;

alter database rename file +DATA/irac/onlinelog/group_3.269.951416439 to /u01/oracle/oradata/IRAC/redo06.dbf;

alter database rename file +DATA/irac/onlinelog/group_4.270.951416439 to /u01/oracle/oradata/IRAC/redo07.dbf;

alter database rename file +DATA/irac/onlinelog/group_4.271.951416439 to /u01/oracle/oradata/IRAC/redo08.dbf;

alter database open resetlogs;

create temporary tablespace temp1 tempfile /u01/oracle/oradata/IRAC/temp1.dbfsize 20M;

alter database default temporary tablespace temp1;

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RAC数据库的RMAN备份异机如何恢复到单节点数据库

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