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转帖---RAC搭建standby

原创 Linux操作系统 作者:andyxu 时间:2009-12-29 10:28:52 0 删除 编辑

为一个RAC搭建standby和单节点搭建方法基本一致,我们可以把RAC看成是一个单节点的数据库,只需要保证所有节点的日志能传送到备库即可。


一、在备库服务器安装ORACLE软件

只安装软件,不要创建数据库。ORACLE软件版本和主库保持一致。


二、修改主库参数

节点1执行:

SQL> show parameter spfile


NAME TYPE VALUE

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

spfile string /dev/raw/raw14


节点2执行:

SQL> show parameter spfile


NAME TYPE VALUE

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

spfile string /dev/raw/raw14


可见,在本例中,RAC各节点共用一个spfile,所以,我们修改参数时,可以只需在一个节点下修改就可以了。


--强制数据库LOGGING

SQL> ALTER DATABASE FORCE LOGGING;


Database altered.

--修改DATAGUARD相关参数

SQL> ALTER SYSTEM SET DB_UNIQUE_NAME=primary scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_CONFIG='DG_CONFIG=(primary,standby)' scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_1='LOCATION=/soft/archivelog/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=primary' scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_2='SERVICE=standby LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=standby' scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_1=ENABLE scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_2=ENABLE scope=spfile;


System altered.


SQL> ALTER SYSTEM SET REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_FORMAT='%t_%s_%r.arc' scope=spfile;


System altered.


SQL> ALTER SYSTEM SET LOG_ARCHIVE_MAX_PROCESSES=4 scope=spfile;


System altered.

SQL> ALTER SYSTEM SET COMPATIBLE = '10.2.0.3' scope=spfile;


System altered.


--以下几个参数是为了SWITCH OVER用的,是可选参数。

--但是为了以后可能发生的SWITCH OVER更方便,应该养成设置这些参数的习惯

SQL> ALTER SYSTEM SET FAL_CLIENT = PRIMARY SCOPE=SPFILE;


System altered.


SQL> ALTER SYSTEM SET FAL_SERVER = STANDBY SCOPE=SPFILE;


System altered.


SQL> ALTER SYSTEM SET STANDBY_FILE_MANAGEMENT =AUTO SCOPE=SPFILE;


System altered.


SQL> ALTER SYSTEM SET DB_FILE_NAME_CONVERT='/soft/oradata/rac/','/dev/raw/' SCOPE=SPFILE;


System altered.


SQL> ALTER SYSTEM SET LOG_FILE_NAME_CONVERT='/soft/oradata/rac/','/dev/raw/' SCOPE=SPFILE;


System altered.


--在本文测试环境下,由于主库和备库路径不一致,所以要设置路径转换参数。


三、修改主库为归档模式

1、--关闭所有实例

--注意:修改以上参数后,必须把所有实例都关闭。否则在启动实例的时候可能会导致错误:

--ORA-00600: internal error code, arguments: [kccsbck_first], [2], [2241198041],

[], [], [], [], []


SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

2、修改为归档模式

--关闭所有节点

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.


--在其中一个节点启用归档

SQL> startup mount

ORACLE instance started.


Total System Global Area 159383552 bytes

Fixed Size 1260672 bytes

Variable Size 79692672 bytes

Database Buffers 75497472 bytes

Redo Buffers 2932736 bytes

Database mounted.

SQL> alter database archivelog;


Database altered.


SQL> alter database open;

Database altered.


10GR2以前,在RAC环境下修改归档必须先把设置参数cluster_database=false,把数据库设置为归档后再把该参数设置为true,但这个步骤在10GR2可以省略。

四、备份数据库

1、备份数据库

备份操作在节点1(rac1)上执行。

由于归档在不同的节点下,故要连接所有节点进行备份:

[oracle@rac1 ~]$ $ORACLE_HOME/bin/rman target /


Recovery Manager: Release 10.2.0.3.0 - Production on Wed Apr 30 14:48:23 2008


Copyright (c) 1982, 2005, Oracle. All rights reserved.


connected to target database: RAC (DBID=2232067446)


RMAN> run

2> {

3> allocate channel c1 device type disk format '/soft/backup/%U' connect sys/test@rac1;

4> allocate channel c2 device type disk format '/soft/backup/%U' connect sys/test@rac2;

5> backup database plus archivelog delete all input;

6> }


using target database control file instead of recovery catalog

allocated channel: c1

channel c1: sid=134 instance=rac1 devtype=DISK


allocated channel: c2

channel c2: sid=141 instance=rac2 devtype=DISK

Starting backup at 30-APR-08

current log archived

channel c1: starting archive log backupset

channel c1: specifying archive log(s) in backup set

input archive log thread=1 sequence=80 recid=1 stamp=653247673

input archive log thread=1 sequence=81 recid=4 stamp=653268228

input archive log thread=1 sequence=82 recid=5 stamp=653353066

channel c1: starting piece 1 at 30-APR-08

channel c2: starting archive log backupset

channel c2: specifying archive log(s) in backup set

input archive log thread=1 sequence=85 recid=13 stamp=653409646

input archive log thread=2 sequence=42 recid=2 stamp=653248818

input archive log thread=2 sequence=43 recid=3 stamp=653250118

input archive log thread=2 sequence=46 recid=10 stamp=653353763

input archive log thread=2 sequence=47 recid=11 stamp=653354798

input archive log thread=2 sequence=48 recid=12 stamp=653409644

input archive log thread=2 sequence=49 recid=16 stamp=653410122

channel c2: starting piece 1 at 30-APR-08

channel c2: finished piece 1 at 30-APR-08

piece handle=/soft/backup/02jf4fql_1_1 tag=TAG20080430T144854 comment=NONE

channel c2: backup set complete, elapsed time: 00:00:05

channel c2: deleting archive log(s)

archive log filename=/soft/archivelog/1_85_644085430.arc recid=13 stamp=653409646

archive log filename=/soft/archivelog/2_42_644085430.arc recid=2 stamp=653248818

archive log filename=/soft/archivelog/2_43_644085430.arc recid=3 stamp=653250118

archive log filename=/soft/archivelog/2_46_644085430.arc recid=10 stamp=653353763

archive log filename=/soft/archivelog/2_47_644085430.arc recid=11 stamp=653354798

archive log filename=/soft/archivelog/2_48_644085430.arc recid=12 stamp=653409644

archive log filename=/soft/archivelog/2_49_644085430.arc recid=16 stamp=653410122

channel c1: finished piece 1 at 30-APR-08

piece handle=/soft/backup/01jf4fqq_1_1 tag=TAG20080430T144854 comment=NONE

channel c1: backup set complete, elapsed time: 00:00:14

channel c1: deleting archive log(s)

archive log filename=/soft/archivelog/1_80_644085430.arc recid=1 stamp=653247673

archive log filename=/soft/archivelog/1_81_644085430.arc recid=4 stamp=653268228

archive log filename=/soft/archivelog/1_82_644085430.arc recid=5 stamp=653353066

channel c1: starting archive log backupset

channel c1: specifying archive log(s) in backup set

input archive log thread=1 sequence=83 recid=6 stamp=653353068

input archive log thread=1 sequence=84 recid=9 stamp=653353575

input archive log thread=1 sequence=86 recid=14 stamp=653409966

input archive log thread=1 sequence=87 recid=15 stamp=653410123

input archive log thread=2 sequence=44 recid=7 stamp=653353071

input archive log thread=2 sequence=45 recid=8 stamp=653353072

channel c1: starting piece 1 at 30-APR-08

channel c1: finished piece 1 at 30-APR-08

piece handle=/soft/backup/03jf4fr9_1_1 tag=TAG20080430T144854 comment=NONE

channel c1: backup set complete, elapsed time: 00:00:02

channel c1: deleting archive log(s)

archive log filename=/soft/archivelog/1_83_644085430.arc recid=6 stamp=653353068

archive log filename=/soft/archivelog/1_84_644085430.arc recid=9 stamp=653353575

archive log filename=/soft/archivelog/1_86_644085430.arc recid=14 stamp=653409966

archive log filename=/soft/archivelog/1_87_644085430.arc recid=15 stamp=653410123

archive log filename=/soft/archivelog/2_44_644085430.arc recid=7 stamp=653353071

archive log filename=/soft/archivelog/2_45_644085430.arc recid=8 stamp=653353072

Finished backup at 30-APR-08


Starting backup at 30-APR-08

channel c1: starting full datafile backupset

channel c1: specifying datafile(s) in backupset

input datafile fno=00001 name=/dev/raw/raw1

input datafile fno=00005 name=/dev/raw/raw7

input datafile fno=00003 name=/dev/raw/raw2

channel c1: starting piece 1 at 30-APR-08

channel c2: starting full datafile backupset

channel c2: specifying datafile(s) in backupset

input datafile fno=00002 name=/dev/raw/raw3

input datafile fno=00004 name=/dev/raw/raw5

channel c2: starting piece 1 at 30-APR-08

channel c2: finished piece 1 at 30-APR-08

piece handle=/soft/backup/05jf4frg_1_1 tag=TAG20080430T144919 comment=NONE

channel c2: backup set complete, elapsed time: 00:00:43

channel c2: starting full datafile backupset

channel c2: specifying datafile(s) in backupset

including current control file in backupset

channel c2: starting piece 1 at 30-APR-08

channel c2: finished piece 1 at 30-APR-08

piece handle=/soft/backup/06jf4ft0_1_1 tag=TAG20080430T144919 comment=NONE

channel c2: backup set complete, elapsed time: 00:00:22

channel c2: starting full datafile backupset

channel c2: specifying datafile(s) in backupset

including current SPFILE in backupset

channel c2: starting piece 1 at 30-APR-08

channel c2: finished piece 1 at 30-APR-08

piece handle=/soft/backup/07jf4ftm_1_1 tag=TAG20080430T144919 comment=NONE

channel c2: backup set complete, elapsed time: 00:00:06

channel c1: finished piece 1 at 30-APR-08

piece handle=/soft/backup/04jf4frg_1_1 tag=TAG20080430T144919 comment=NONE

channel c1: backup set complete, elapsed time: 00:01:13

Finished backup at 30-APR-08


Starting backup at 30-APR-08

current log archived

channel c1: starting archive log backupset

channel c1: specifying archive log(s) in backup set

input archive log thread=1 sequence=88 recid=17 stamp=653410237

channel c1: starting piece 1 at 30-APR-08

channel c1: finished piece 1 at 30-APR-08

piece handle=/soft/backup/08jf4fv9_1_1 tag=TAG20080430T145120 comment=NONE

channel c1: backup set complete, elapsed time: 00:00:04

channel c1: deleting archive log(s)

archive log filename=/soft/archivelog/1_88_644085430.arc recid=17 stamp=653410237

channel c1: starting archive log backupset

channel c1: specifying archive log(s) in backup set

input archive log thread=2 sequence=50 recid=18 stamp=653410279

channel c1: starting piece 1 at 30-APR-08

channel c1: finished piece 1 at 30-APR-08

piece handle=/soft/backup/09jf4fvf_1_1 tag=TAG20080430T145120 comment=NONE

channel c1: backup set complete, elapsed time: 00:00:04

channel c1: deleting archive log(s)

archive log filename=/soft/archivelog/2_50_644085430.arc recid=18 stamp=653410279

Finished backup at 30-APR-08

released channel: c1

released channel: c2

2、生成备库控制文件

RMAN> run

2> {

3> allocate channel c1 device type disk format '/soft/backup/CON_%U';

4> backup current controlfile for standby;

5> }


allocated channel: c1

channel c1: sid=131 instance=rac1 devtype=DISK


Starting backup at 30-APR-08

channel c1: starting full datafile backupset

channel c1: specifying datafile(s) in backupset

including standby control file in backupset

channel c1: starting piece 1 at 30-APR-08

channel c1: finished piece 1 at 30-APR-08

piece handle=/soft/backup/CON_0ajf4gqi_1_1 tag=TAG20080430T150554 comment=NONE

channel c1: backup set complete, elapsed time: 00:00:12

Finished backup at 30-APR-08

released channel: c1

五、备库环境准备


1、在备库添加指向主库的tnsnames

在备库的tnsnames.ora添加如下内容:

primary =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = 200.200.200.11)(PORT = 1521))

(ADDRESS = (PROTOCOL = TCP)(HOST = 200.200.200.22)(PORT = 1521))

(LOAD_BALANCE = yes)

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = primary)

(FAILOVER_MODE =

(TYPE = SELECT)

(METHOD = BASIC)

(RETRIES = 180)

(DELAY = 5)

)

)

)2、在备库创建相关目录

包括adump,bdump,cdump,udump及数据文件目录等。

3、拷贝主库的密码文件到备库上

--拷贝rac1的密码文件到备库的$ORACLE_HOME/dbs下,并把该密码文件修改为orapwd。这里我的sid就用rac1,所以,不用改名。

[oracle@rac1 dbs]$ scp orapwrac1 172.25.0.35:`pwd`

orapwrac1 100% 1536 1.5KB/s 00:00


4、配置备库的监听

[oracle@standby admin]$ more listener.ora


SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = standby)

(ORACLE_HOME = /opt/oracle/product/10.2/database)

(SID_NAME = rac1)

)

)


LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = standby)(PORT = 1521))

)

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))

)

)


启动备库监听:lsnrctl start


5、设置备库参数文件

从主库rac1上根据spfile创建一个pfile文件,并传到备库上。

SQL> create pfile from spfile;


File created.


SQL> exit

Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production

With the Partitioning, Real Application Clusters and Data Mining options

[oracle@rac1 ~]$ cd $ORACLE_HOME/dbs

[oracle@rac1 dbs]$ scp initrac1.ora 172.25.0.35:`pwd`

initrac1.ora


在备库上修改参数文件:


? 删除所有非”*”打头的参数设置及rac相关参数

? 设置dataguard参数


修改后参数如下:

[oracle@standby dbs]$ more initrac1.ora

*.audit_file_dest='/opt/oracle/admin/rac/adump'

*.background_dump_dest='/opt/oracle/admin/rac/bdump'

*.compatible='10.2.0.3'

*.control_files='/soft/oradata/rac/control01.ctl','/soft/oradata/rac/control02.ctl','/soft/oradata/rac/control03.ctl'

*.core_dump_dest='/opt/oracle/admin/rac/cdump'

*.db_block_size=8192

*.db_domain=''

*.db_file_multiblock_read_count=16

*.db_file_name_convert='/DEV/RAW/','/SOFT/ORADATA/RAC/'

*.db_name='rac'

*.db_unique_name='STANDBY'

*.fal_client='STANDBY'

*.fal_server='PRIMARY'

*.job_queue_processes=10

*.log_archive_config='DG_CONFIG=(primary,standby)'

*.log_archive_dest_1='LOCATION= /soft/oradata/archivelog/ VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=standby'

*.log_archive_dest_2='SERVICE=primary LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=primary'

*.log_archive_dest_state_1='ENABLE'

*.log_archive_dest_state_2='ENABLE'

*.log_archive_format='%t_%s_%r.arc'

*.log_archive_max_processes=4

*.log_file_name_convert='/DEV/RAW/','/SOFT/ORADATA/RAC/'

*.open_cursors=300

*.pga_aggregate_target=16777216

*.processes=150

*.remote_login_passwordfile='EXCLUSIVE'

*.sga_max_size=157286400

*.sga_target=157286400

*.standby_file_management='AUTO'

*.undo_management='AUTO'

undo_tablespace='UNDOTBS1'

*.user_dump_dest='/opt/oracle/admin/rac/udump'

以上有些参数非必须设置的,但是为了switchover更方便,建议都修改上。

Undo表空间保留其中一个就可以。

路径转换相关参数要设置对,否则会报错。


6、把备库启动到nomount状态

[oracle@standby ~]$ sqlplus "/as sysdba"


SQL*Plus: Release 10.2.0.3.0 - Production on Wed Apr 30 18:42:39 2008


Copyright (c) 1982, 2006, Oracle. All Rights Reserved.


Connected to an idle instance.


SQL> startup nomount

ORACLE instance started.


Total System Global Area 159383552 bytes

Fixed Size 1260672 bytes

Variable Size 62915456 bytes

Database Buffers 92274688 bytes

Redo Buffers 2932736 bytes


7、从主库拷贝备份到备库上

之前备份的所有文件都拷贝到备库上,路径要和主库备份路径保持一致。如果不一致,linux下可以用ln的方式解决。

注意:两个节点都有归档的备份,要把这些备份都拷贝到备库上。

RAC1:

[oracle@rac1 backup]$ scp * 172.25.0.35:`pwd`

01jf4fqq_1_1 100% 23MB 3.8MB/s 00:06

03jf4fr9_1_1 100% 194KB 194.0KB/s 00:00

04jf4frg_1_1 100% 315MB 3.4MB/s 01:34

08jf4fv9_1_1 100% 13KB 13.0KB/s 00:00

09jf4fvf_1_1 100% 4608 4.5KB/s 00:00

CON_0ajf4gqi_1_1 100% 15MB 3.7MB/s 00:04


RAC2:

[oracle@rac2 backup]$ scp * 172.25.0.35:`pwd`

02jf4fql_1_1 100% 7145KB 3.5MB/s 00:02

05jf4frg_1_1 100% 175MB 3.4MB/s 00:52

06jf4ft0_1_1 100% 15MB 1.5MB/s 00:10

07jf4ftm_1_1 100% 96KB 96.0KB/s 00:00

、恢复备库

1、在主库添加指向备库的tnsname

在主库的tnsnames.ora添加如下内容:

STANDBY =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST =200.200.200.123)(PORT = 1521))

(CONNECT_DATA =

(SERVER = DEDICATED)

(SERVICE_NAME = standby)

)


2、在主库执行,利用auxiliary来恢复备库

[oracle@rac1 ~]$ $ORACLE_HOME/bin/rman target / auxiliary sys/6212327@standby


Recovery Manager: Release 10.2.0.3.0 - Production on Wed Apr 30 19:37:05 2008


Copyright (c) 1982, 2005, Oracle. All rights reserved.


connected to target database: RAC (DBID=2232067446)

connected to auxiliary database: RAC (not mounted)


RMAN> run

{

allocate channel c1 device type disk format '/soft/backup/%U' connect sys/6212327@rac1;

2> 3> 4> allocate channel c2 device type disk format '/soft/backup/%U' connect sys/6212327@rac2;

5> allocate auxiliary channel ac1 device type disk format '/soft/backup/%U';

6> allocate auxiliary channel ac2 device type disk format '/soft/backup/%U';

7> duplicate target database for standby;

8> }


using target database control file instead of recovery catalog

allocated channel: c1

channel c1: sid=132 instance=rac1 devtype=DISK


allocated channel: c2

channel c2: sid=134 instance=rac2 devtype=DISK


allocated channel: ac1

channel ac1: sid=155 devtype=DISK


allocated channel: ac2

channel ac2: sid=154 devtype=DISK


Starting Duplicate Db at 30-APR-08


contents of Memory Script.:

{

restore clone standby controlfile;

sql clone 'alter database mount standby database';

}

executing Memory Script


Starting restore at 30-APR-08


channel ac1: starting datafile backupset restore

channel ac1: restoring control file

channel ac1: reading from backup piece /soft/backup/CON_0ajf4gqi_1_1

channel ac1: restored backup piece 1

piece handle=/soft/backup/CON_0ajf4gqi_1_1 tag=TAG20080430T150554

channel ac1: restore complete, elapsed time: 00:00:04

output filename=/soft/oradata/rac/control01.ctl

output filename=/soft/oradata/rac/control02.ctl

output filename=/soft/oradata/rac/control03.ctl

Finished restore at 30-APR-08


sql statement: alter database mount standby database


contents of Memory Script.:

{

set newname for tempfile 1 to

"/soft/oradata/rac/raw6";

switch clone tempfile all;

set newname for datafile 1 to

"/soft/oradata/rac/raw1";

set newname for datafile 2 to

"/soft/oradata/rac/raw3";

set newname for datafile 3 to

"/soft/oradata/rac/raw2";

set newname for datafile 4 to

"/soft/oradata/rac/raw5";

set newname for datafile 5 to

"/soft/oradata/rac/raw7";

restore

check readonly

clone database

;

}

executing Memory Script


executing command: SET NEWNAME


renamed temporary file 1 to /soft/oradata/rac/raw6 in control file


executing command: SET NEWNAME


executing command: SET NEWNAME


executing command: SET NEWNAME


executing command: SET NEWNAME


executing command: SET NEWNAME


Starting restore at 30-APR-08


channel ac1: starting datafile backupset restore

channel ac1: specifying datafile(s) to restore from backup set

restoring datafile 00002 to /soft/oradata/rac/raw3

restoring datafile 00004 to /soft/oradata/rac/raw5

channel ac1: reading from backup piece /soft/backup/05jf4frg_1_1

channel ac2: starting datafile backupset restore

channel ac2: specifying datafile(s) to restore from backup set

restoring datafile 00001 to /soft/oradata/rac/raw1

restoring datafile 00003 to /soft/oradata/rac/raw2

restoring datafile 00005 to /soft/oradata/rac/raw7

channel ac2: reading from backup piece /soft/backup/04jf4frg_1_1

channel ac1: restored backup piece 1

piece handle=/soft/backup/05jf4frg_1_1 tag=TAG20080430T144919

channel ac1: restore complete, elapsed time: 00:01:22

channel ac2: restored backup piece 1

piece handle=/soft/backup/04jf4frg_1_1 tag=TAG20080430T144919

channel ac2: restore complete, elapsed time: 00:01:32

Finished restore at 30-APR-08


contents of Memory Script.:

{

switch clone datafile all;

}

executing Memory Script


datafile 1 switched to datafile copy

input datafile copy recid=6 stamp=653426781 filename=/soft/oradata/rac/raw1

datafile 2 switched to datafile copy

input datafile copy recid=7 stamp=653426781 filename=/soft/oradata/rac/raw3

datafile 3 switched to datafile copy

input datafile copy recid=8 stamp=653426781 filename=/soft/oradata/rac/raw2

datafile 4 switched to datafile copy

input datafile copy recid=9 stamp=653426781 filename=/soft/oradata/rac/raw5

datafile 5 switched to datafile copy

input datafile copy recid=10 stamp=653426781 filename=/soft/oradata/rac/raw7

Finished Duplicate Db at 30-APR-08

released channel: c1

released channel: c2

released channel: ac1

released channel: ac2


从日志可以看到,oracle先根据参数文件把控制文件恢复到合适位置,然后再根据db_file_name_cover把数据文件恢复到合适位置。

七、后续工作

1、把备库至于恢复状态:

[oracle@standby admin]$ sqlplus "/as sysdba"


SQL*Plus: Release 10.2.0.3.0 - Production on Wed Apr 30 19:40:59 2008


Copyright (c) 1982, 2006, Oracle. All Rights Reserved.

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production

With the Partitioning, Oracle Label Security and Data Mining options


SQL> alter database recover managed standby database disconnect from session;


Database altered


此时观察备库的alert文件,可以发现有很多类似的信息:

Errors in file /opt/oracle/admin/rac/bdump/rac1_mrp0_10825.trc:

ORA-00313: open failed for members of log group 4 of thread 2

ORA-00312: online log 4 thread 2: '/soft/oradata/rac/raw11'

ORA-27037: unable to obtain file status

Linux Error: 2: No such file or directory

Additional information: 3

Clearing online redo logfile 4 /soft/oradata/rac/raw11

Clearing online log 4 of thread 2 sequence number 50


这是正常的,在第一次置于recover状态的时候,备库会生成对应的online redo log。


2、在备库添加standby redo log

Standby redo log比archivelog方式有更大的优势,且在最大保护、最大可用、实时恢复的情况下必须有standby redo log。

Standby redo log的组数一般为(N +1)* thread# (N分别为每个thread#的联机日志组数)。在本例,每一个thread的联机日志都是2组,所以,需要添加6组standby redo log:

SQL> alter database recover managed standby database cancel;


Database altered.


SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 1 ('/soft/oradata/rac/slog4.ora') SIZE 52428800;


Database altered.


SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 1 ('/soft/oradata/rac/slog5.ora') SIZE 52428800;


Database altered.


SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 1 ('/soft/oradata/rac/slog6.ora') SIZE 52428800;


Database altered.


SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 2 ('/soft/oradata/rac/slog7.ora') SIZE 52428800;


Database altered.


SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 2 ('/soft/oradata/rac/slog8.ora') SIZE 52428800;


Database altered.


SQL> ALTER DATABASE ADD STANDBY LOGFILE THREAD 2 ('/soft/oradata/rac/slog9.ora') SIZE 52428800;


Database altered.


注意:standby redo log的大小必须和联机日志一样。

七、遇到的问题

1、FAL[client, MRP0]: Error 12545 connecting to PRIMARY for fetching gap sequence

Wed Apr 30 20:21:23 2008

Errors in file /opt/oracle/admin/rac/bdump/rac1_mrp0_10965.trc:

ORA-12545: Connect failed because target host or object does not exist

Wed Apr 30 20:22:23 2008

FAL[client]: Failed to request gap sequence

GAP - thread 1 sequence 88-88

DBID 2232067446 branch 644085430

FAL[client]: All defined FAL servers have been attempted.


这个问题和gap有关, 备库尝试拿gap的时候,发现不能连接主库。这个问题是RAC的监听造成的,参考yangtingkun的解决方法,修改两个参数即可:

ALTER SYSTEM SET LOCAL_LISTENER = '(ADDRESS = (PROTOCOL = TCP)(HOST = 200.200.200.11)(PORT = 1521))' SID = 'rac1';

ALTER SYSTEM SET LOCAL_LISTENER = '(ADDRESS = (PROTOCOL = TCP)(HOST = 200.200.200.22)(PORT = 1521))' SID = 'rac2';


2、Wed Apr 30 20:28:51 2008

FAL[client]: Failed to request gap sequence

GAP - thread 1 sequence 88-88

DBID 2232067446 branch 644085430

FAL[client]: All defined FAL servers have been attempted.

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

Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization

parameter is defined to a value that is sufficiently large

enough to maintain adequate log switch information to resolve

archivelog gaps.


这个问题还是和gap有关。备库现在需要从主库上拿sequence 88这个归档,但这个归档在前面做备份的时候删除了。解决方法是从备份还原这个归档:


RMAN> restore archivelog sequence 88;


Starting restore at 30-APR-08

allocated channel: ORA_DISK_1

channel ORA_DISK_1: sid=138 instance=rac1 devtype=DISK


channel ORA_DISK_1: starting archive log restore to default destination

channel ORA_DISK_1: restoring archive log

archive log thread=1 sequence=88

channel ORA_DISK_1: reading from backup piece /soft/backup/08jf4fv9_1_1

channel ORA_DISK_1: restored backup piece 1

piece handle=/soft/backup/08jf4fv9_1_1 tag=TAG20080430T145120

channel ORA_DISK_1: restore complete, elapsed time: 00:00:03

Finished restore at 30-APR-08

来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/110321/viewspace-623828/,如需转载,请注明出处,否则将追究法律责任。

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