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Duplicate復制資料庫并創建物理StandBy（pfile版本）

2020-09-13 07:06:31 資料庫

1設定環境如下：

Primary資料庫

IP 172.17.22.16
SID orcl

Standby資料庫

IP 172.17.22.17
SID orcl

設定提示，以區分操作的位置

primary資料庫 

set SQLPROMPT Primary>

standby資料庫

set SQLPROMPT StandBy>

1、Primary端設定 歸檔模式+強制日志

確保primary資料庫運行在歸檔模式

Primary>archive log list
Database log mode           No Archive Mode
Automatic archival           Disabled
Archive destination           USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     5
Current log sequence           7
Primary>shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
Primary>startup mount
ORACLE instance started.

Total System Global Area 3290345472 bytes
Fixed Size            2217832 bytes
Variable Size         1795164312 bytes
Database Buffers     1476395008 bytes
Redo Buffers           16568320 bytes
Database mounted.
Primary>alter database archivelog;

Database altered.

Primary>alter database open;

Database altered.


Primary>archive log list
Database log mode           Archive Mode
Automatic archival           Enabled
Archive destination           USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     5
Next log sequence to archive   7
Current log sequence           7
Primary>

開啟強制日志

Primary>select force_logging from v$database;

FOR
---
NO

Primary>alter database force logging;

Database altered.

2、standby端創建相關目錄

為了和Primary庫保存相同的結構，我們需要在Standby資料庫建立相同的目錄，首先查詢現有Primary資料庫的相關目錄

Primary>col name for a30
Primary>col value for a100
Primary>select name ,value from v$parameter  where name in ('audit_file_dest','background_dump_dest','control_files','core_dump_dest','user_dump_dest') ORDER BY name ASC;

NAME                   VALUE
------------------------------ ---------------------------------------------------------------------------------------------
audit_file_dest          /usr/oracle/app/admin/orcl/adump
background_dump_dest    /usr/oracle/app/diag/rdbms/orcl/orcl/trace
control_files           /usr/oracle/app/oradata/orcl/control01.ctl, /usr/oracle/app/flash_recovery_area/orcl/control02.ctl
core_dump_dest          /usr/oracle/app/diag/rdbms/orcl/orcl/cdump
user_dump_dest          /usr/oracle/app/diag/rdbms/orcl/orcl/trace

在standby資料庫服務器創建相同的目錄

[oracle@oracledb ~]$ mkdir -p /usr/oracle/app/admin/orcl/adump
[oracle@oracledb ~]$ mkdir -p /usr/oracle/app/diag/rdbms/orcl/orcl/trace
[oracle@oracledb ~]$ mkdir -p /usr/oracle/app/oradata/orcl
[oracle@oracledb ~]$ mkdir -p /usr/oracle/app/flash_recovery_area/orcl
[oracle@oracledb ~]$ mkdir -p /usr/oracle/app/diag/rdbms/orcl/orcl/
[oracle@oracledb ~]$ mkdir -p /usr/oracle/app/diag/rdbms/orcl/orcl/trace

3、創建輔助實體密鑰檔案

方法一： 直接從Primary資料庫復制密鑰檔案過來

[oracle@oracledb dbs]$ scp orapworcl 172.17.22.17:/usr/oracle/app/product/11.2.0/dbhome_1/dbs
[email protected]'s password: 
orapworcl                                     100% 1536     1.5KB/s   00:00    
[oracle@oracledb dbs]$

方法二： orapwd生成

orapwd FILE=/usr/oracle/app/product/11.2.0/dbhome_1/dbs/orapworcl password=wangshengzhuang entries=30;

4、生成standby端的pfile

在Primary端根據spfile生產pfile

Primary>create pfile from spfile;

File created.

修改Primary端的pfile內容如下

orcl.__db_cache_size=1476395008
orcl.__java_pool_size=16777216
orcl.__large_pool_size=16777216
orcl.__oracle_base='/usr/oracle/app'#ORACLE_BASE set from environment
orcl.__pga_aggregate_target=1325400064
orcl.__sga_target=1979711488
orcl.__shared_io_pool_size=0
orcl.__shared_pool_size=436207616
orcl.__streams_pool_size=0
*.audit_file_dest='/usr/oracle/app/admin/orcl/adump'
*.audit_trail='db'
*.compatible='11.2.0.0.0'
*.control_files='/usr/oracle/app/oradata/orcl/control01.ctl','/usr/oracle/app/flash_recovery_area/orcl/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_name='orcl'
*.db_recovery_file_dest='/usr/oracle/app/flash_recovery_area'
*.db_recovery_file_dest_size=4070572032
*.diagnostic_dest='/usr/oracle/app'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
*.memory_target=3299868672
*.nls_language='SIMPLIFIED CHINESE'
*.nls_territory='CHINA'
*.open_cursors=300
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.undo_tablespace='UNDOTBS1'




*.DB_UNIQUE_NAME=db_primary
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(db_primary,db_standby)'
*.LOG_ARCHIVE_DEST_2='SERVICE=tns_standby ARCH VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_standby' #arch表示同步已歸檔的日志
*.LOG_ARCHIVE_DEST_STATE_2=DEFER #表示歸檔目的地暫時不可用


*.FAL_SERVER=tns_standby
*.FAL_CLIENT=tns_primary
*.STANDBY_FILE_MANAGEMENT=AUTO

Primary端重新啟動

Primary>create spfile from pfile;

File created.

Primary>startup
ORACLE instance started.

Total System Global Area 3290345472 bytes
Fixed Size            2217832 bytes
Variable Size         1795164312 bytes
Database Buffers     1476395008 bytes
Redo Buffers           16568320 bytes
Database mounted.
Database opened.

Primary>show parameter fal

NAME                     TYPE            VALUE
------------------------------------ ---------------------- ------------------------------
fal_client                 string            tns_primary  #tns_primary為主服務器的網路服務名
fal_server                 string            tns_standby

復制生成的initorcl.ora到standby的$ORACLE_HOME/dbs目錄下

[oracle@oracledb dbs]$ pwd
/usr/oracle/app/product/11.2.0/dbhome_1/dbs
[oracle@oracledb dbs]$ scp initorcl.ora 172.17.22.17:/usr/oracle/app/product/11.2.0/dbhome_1/dbs
The authenticity of host '172.17.22.17 (172.17.22.17)' can't be established.
RSA key fingerprint is 72:28:f5:f9:9c:f8:49:23:48:6d:9d:d4:0e:0c:89:71.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.17.22.17' (RSA) to the list of known hosts.
[email protected]'s password: 
initorcl.ora                                  100% 1291     1.3KB/s   00:00    
[oracle@oracledb dbs]$

修改standbyd端的initorcl.ora檔案，內容如下

orcl.__db_cache_size=1476395008
orcl.__java_pool_size=16777216
orcl.__large_pool_size=16777216
orcl.__oracle_base='/usr/oracle/app'#ORACLE_BASE set from environment
orcl.__pga_aggregate_target=1325400064
orcl.__sga_target=1979711488
orcl.__shared_io_pool_size=0
orcl.__shared_pool_size=436207616
orcl.__streams_pool_size=0
*.audit_file_dest='/usr/oracle/app/admin/orcl/adump'
*.audit_trail='db'
*.compatible='11.2.0.0.0'
*.control_files='/usr/oracle/app/oradata/orcl/control01.ctl','/usr/oracle/app/flash_recovery_area/orcl/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_name='orcl'
*.db_recovery_file_dest='/usr/oracle/app/flash_recovery_area'
*.db_recovery_file_dest_size=4070572032
*.diagnostic_dest='/usr/oracle/app'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
*.memory_target=3299868672
*.nls_language='SIMPLIFIED CHINESE'
*.nls_territory='CHINA'
*.open_cursors=300
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.undo_tablespace='UNDOTBS1'




*.DB_UNIQUE_NAME=db_standby
*.LOG_ARCHIVE_CONFIG='DG_CONFIG=(db_primary,db_standby)'
*.LOG_ARCHIVE_DEST_2='SERVICE=tns_primary ARCH VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_primary'  #ARCH為已歸檔日志
*.LOG_ARCHIVE_DEST_STATE_2=ENABLE  #備用的連接到主的可以開啟,因為此時主同步日志到備未啟用


*.FAL_SERVER=tns_primary
*.FAL_CLIENT=tns_standby
*.STANDBY_FILE_MANAGEMENT=AUTO

通過復制的pfile創建Standby資料庫的spfile

StandBy> create spfile from pfile;

File created.

啟動到nomount環境

SQL> startup nomount
ORACLE instance started.

Total System Global Area 3290345472 bytes
Fixed Size            2217832 bytes
Variable Size         1795164312 bytes
Database Buffers     1476395008 bytes
Redo Buffers           16568320 bytes

5、配置監聽服務

Primary端監聽

# listener.ora Network Configuration File: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /usr/oracle/app

StandBy端監聽（配置了靜態監聽 服務名GLOBAL_DBNAME = StandBy）

# listener.ora Network Configuration File: /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.


#紅色字體為靜態監聽,后面duplicate需要用到靜態監聽注冊
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = StandBy)
      (ORACLE_HOME =/usr/oracle/app/product/11.2.0/dbhome_1)
      (SID_NAME = orcl)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /usr/oracle/app

啟動standby端監聽

[oracle@oracledb admin]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 23-DEC-2015 15:48:15

Copyright (c) 1991, 2009, Oracle.  All rights reserved.

Starting /usr/oracle/app/product/11.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1.0 - Production
System parameter file is /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora
Log messages written to /usr/oracle/app/diag/tnslsnr/oracledb/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.22.17)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date                23-DEC-2015 15:48:16
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /usr/oracle/app/product/11.2.0/dbhome_1/network/admin/listener.ora
Listener Log File         /usr/oracle/app/diag/tnslsnr/oracledb/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.22.17)(PORT=1521)))
Services Summary...
Service "StandBy" has 1 instance(s).
  Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

6、配置網路服務名，并測驗互通性

Primary端和StandBy端都要進行如下配置：

tns_primary =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521))
    (CONNECT_DATA =https://www.cnblogs.com/vmsysjack/p/
      (SERVER = DEDICATED)
      (SERVICE_NAME = db_primary)
    )
  )


tns_standby =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521))
    (CONNECT_DATA =https://www.cnblogs.com/vmsysjack/p/
      (SERVER = DEDICATED)
      (SERVICE_NAME =StandBy )
    )
  )

***********************************************************************************************

SERVICE_NAME 的值參考lsnrctl的輸出，確保用sqlplus工具或者navicact工具能夠連接SERVICE_NAME

因為fal_server 會使用服務名，如果配置不正確，這歸檔日志無法正常發送

***********************************************************************************************

在primary端和standby端都進行測驗（為了角色切換）

[oracle@oracledb admin]$ tnsping tns_primary

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 23-DEC-2015 15:48:44

Copyright (c) 1997, 2009, Oracle.  All rights reserved.

Used parameter files:
/usr/oracle/app/product/11.2.0/dbhome_1/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521)) (CONNECT_DATA = https://www.cnblogs.com/vmsysjack/p/(SERVER = DEDICATED) (SERVICE_NAME = orcl)))
OK (0 msec)
[oracle@oracledb admin]$ tnsping tns_standby

TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 23-DEC-2015 15:48:49

Copyright (c) 1997, 2009, Oracle.  All rights reserved.

Used parameter files:
/usr/oracle/app/product/11.2.0/dbhome_1/network/admin/sqlnet.ora


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521)) (CONNECT_DATA = https://www.cnblogs.com/vmsysjack/p/(SERVER = DEDICATED) (SERVICE_NAME = orcl)))
OK (0 msec)

7、duplicate standby

rman連接兩個資料庫

[oracle@oracledb admin]$ rman target sys/primary_password@tns_primary auxiliary sys/standby_password@tns_standby

Recovery Manager: Release 11.2.0.1.0 - Production on Wed Dec 23 16:11:51 2015

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: ORCL (DBID=1426832466)
connected to auxiliary database: ORCL (not mounted)

開始復制

RMAN> DUPLICATE TARGET DATABASE FOR STANDBY FROM ACTIVE DATABASE DORECOVER NOFILENAMECHECK;

Starting Duplicate Db at 23-DEC-15
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=20 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 12/23/2015 16:13:38
RMAN-05541: no archived logs found in target database

primary端切換下日志，重寫執行rman duplicate即可

View Code

8、啟用日志傳送

Primary>show parameter LOG_ARCHIVE_DEST_STATE_2

NAME                     TYPE            VALUE
------------------------------------ ---------------------- ------------------------------
log_archive_dest_state_2          string            DEFER   #當前主的還未啟用
log_archive_dest_state_20         string            enable
log_archive_dest_state_21         string            enable
log_archive_dest_state_22         string            enable
log_archive_dest_state_23         string            enable
log_archive_dest_state_24         string            enable
log_archive_dest_state_25         string            enable
log_archive_dest_state_26         string            enable
log_archive_dest_state_27         string            enable
log_archive_dest_state_28         string            enable
log_archive_dest_state_29         string            enable

Primary>alter system set LOG_ARCHIVE_DEST_STATE_2=ENABLE;

System altered.

8、驗證結果

查詢primary資料庫角色

Primary>select database_role from v$database;

DATABASE_ROLE
--------------------------------
PRIMARY

查詢standby資料庫角色

StandBy>select database_role from v$database;

DATABASE_ROLE
--------------------------------
PHYSICAL STANDBY

StandBy>

primary端插入一條資料

Primary> INSERT INTO "SCOTT"."DEPT" ("DEPTNO", "DNAME", "LOC") VALUES ('12', 'OPERATIONS', 'OPERATIONS');
row created.

Primary>commit;

Commit complete.

Primary>alter system switch logfile;

System altered.

standby端：啟動redo應用; 暫停redo應用 ; 打開資料庫; 查詢資料是否被同步過來了

StandBy>alter database recover managed standby database disconnect from session; #standby端應用redo

Database altered.

StandBy>alter database recover managed standby database cancel; #取消應用redo

Database altered.

StandBy>alter database open;  #打開資料庫

Database altered.

StandBy>select open_mode from v$database;   #standby是只讀狀態

OPEN_MODE
----------------------------------------
READ ONLY

StandBy>

見證奇跡的時刻

StandBy>select * from scott.dept;

DEPTNO DNAME            LOC
---------- ---------------------------- --------------------------
ACCOUNTING             NEW YORK
RESEARCH               DALLAS
SALES                  CHICAGO
OPERATIONS             BOSTON
OPERATIONS             OPERATIONS

9、啟用實時應用redo

添加redo log

首先查詢當前redo log的大小、位置

Primary>col group# for 9
Primary>col status for a10
Primary>col type for a10
Primary>col member for a50;
Primary>col is_rec for a10
Primary>select * from v$logfile;

GROUP# STATUS      TYPE         MEMBER                        IS_REC
------ ---------- ---------- -------------------------------------------------- ------
         ONLINE     /usr/oracle/app/oradata/orcl/redo03.log        NO
         ONLINE     /usr/oracle/app/oradata/orcl/redo02.log        NO
         ONLINE     /usr/oracle/app/oradata/orcl/redo01.log        NO

Primary>select * from v$log;

GROUP#      THREAD#  SEQUENCE#      BYTES  BLOCKSIZE    MEMBERS ARCHIV STATUS    FIRST_CHANGE# FIRST_TIME   NEXT_CHANGE# NEXT_TIME
------ ---------- ---------- ---------- ---------- ---------- ------ ---------- ------------- ------------ ------------ ------------
       1      10   52428800        512        1 NO     CURRENT          1029234 23-DEC-15      2.8147E+14
       1       8   52428800        512        1 YES    INACTIVE          1028340 23-DEC-15     1028421 23-DEC-15
       1       9   52428800        512        1 YES    INACTIVE          1028421 23-DEC-15     1029234 23-DEC-15

當前有三組、每組1個member、大小為50M, 我們增加四組，每組1個member，大小為50M

Primary>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 4('/usr/oracle/app/oradata/orcl/stbyredolog4a.log') SIZE  50 M;

Database altered.

Primary>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 5('/usr/oracle/app/oradata/orcl/stbyredolog5a.log') SIZE  50 M;

Database altered.

Primary>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 6('/usr/oracle/app/oradata/orcl/stbyredolog6a.log') SIZE  50 M;

Database altered.

Primary>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 7('/usr/oracle/app/oradata/orcl/stbyredolog7a.log') SIZE  50 M;

Database altered.

查看結果：

Primary>select * from v$logfile;

GROUP# STATUS      TYPE         MEMBER                        IS_REC
------ ---------- ---------- -------------------------------------------------- ------
         ONLINE     /usr/oracle/app/oradata/orcl/redo03.log        NO
         ONLINE     /usr/oracle/app/oradata/orcl/redo02.log        NO
         ONLINE     /usr/oracle/app/oradata/orcl/redo01.log        NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog4a.log    NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog5a.log    NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog6a.log    NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog7a.log    NO
rows selected.

同理在standby端做相同的操作

StandBy>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 4('/usr/oracle/app/oradata/orcl/stbyredolog4a.log') SIZE  50 M;

Database altered.

StandBy>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 5('/usr/oracle/app/oradata/orcl/stbyredolog5a.log') SIZE  50 M;

Database altered.

StandBy>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 6('/usr/oracle/app/oradata/orcl/stbyredolog6a.log') SIZE  50 M;

Database altered.

StandBy>ALTER DATABASE ADD STANDBY   LOGFILE GROUP 7('/usr/oracle/app/oradata/orcl/stbyredolog7a.log') SIZE  50 M;

Database altered.
StandBy>select * from v$logfile;

GROUP# STATUS      TYPE         MEMBER                                                  IS_REC
------ ---------- ---------- ---------------------------------------------------------------------------------------------------- ------
         ONLINE     /usr/oracle/app/flash_recovery_area/DB_STANDBY/onlinelog/o1_mf_3_c7np1p97_.log              YES
         ONLINE     /usr/oracle/app/flash_recovery_area/DB_STANDBY/onlinelog/o1_mf_2_c7np1osm_.log              YES
         ONLINE     /usr/oracle/app/flash_recovery_area/DB_STANDBY/onlinelog/o1_mf_1_c7np1od8_.log              YES
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog4a.log                              NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog5a.log                              NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog6a.log                              NO
         STANDBY    /usr/oracle/app/oradata/orcl/stbyredolog7a.log                              NO

更改primary和standby端的log_archive_dest_2

Primary>show parameter log_archive_dest_2

NAME                     TYPE    VALUE
------------------------------------ ---------- ------------------------------
log_archive_dest_2             string    SERVICE=tns_standby ARCH VALID
                        _FOR=(ONLINE_LOGFILES,PRIMARY_
                        ROLE) DB_UNIQUE_NAME=db_standb
                        y
log_archive_dest_20             string
log_archive_dest_21             string
log_archive_dest_22             string
log_archive_dest_23             string
log_archive_dest_24             string
log_archive_dest_25             string
log_archive_dest_26             string
log_archive_dest_27             string
log_archive_dest_28             string
log_archive_dest_29             string

Primary>alter system set log_archive_dest_2='SERVICE=tns_standby LGWR VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_standby';
                                                            #以前此處為ARCH,
System altered.

Primary>show parameter log_archive_dest_2
NAME                     TYPE    VALUE
------------------------------------ ---------- ------------------------------
log_archive_dest_2             string    SERVICE=tns_standby LGWR VALID
                        _FOR=(ONLINE_LOGFILES,PRIMARY_
                        ROLE) DB_UNIQUE_NAME=db_standb
                        y
log_archive_dest_20             string
log_archive_dest_21             string
log_archive_dest_22             string
log_archive_dest_23             string
log_archive_dest_24             string
log_archive_dest_25             string
log_archive_dest_26             string
log_archive_dest_27             string
log_archive_dest_28             string
log_archive_dest_29             string
Primary>

更改standby端的log_archive_dest_2

StandBy>alter system set log_archive_dest_2='SERVICE=tns_primary LGWR VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=db_primary';

啟用實時StandBy端redo應用

StandBy>alter database recover managed standby database using current logfile  disconnect from session;   #因為更改成了LGWR來傳遞,所以需要使用實時

驗證：

首先在Primay端插入一條資料：

Primary>select * from scott.dept;

    DEPTNO DNAME            LOC
---------- ---------------------------- --------------------------
ACCOUNTING            NEW YORK
RESEARCH              DALLAS
SALES                 CHICAGO
OPERATIONS            BOSTON
OPERATIONS            OPERATIONS

Primary>INSERT INTO "SCOTT"."DEPT" ("DEPTNO", "DNAME", "LOC") VALUES ('13', 'OPERATIONS', 'OPERATIONS');
row created.

Primary>commit;

Commit complete.

standby端查看

StandBy>select * from scott.dept;
    DEPTNO DNAME            LOC
---------- ---------------------------- --------------------------
ACCOUNTING            NEW YORK
RESEARCH               DALLAS
SALES            　　  CHICAGO
OPERATIONS            BOSTON
OPERATIONS            OPERATIONS
OPERATIONS            OPERATIONS
rows selected.

10、switchover

備庫暫停 redo應用

StandBy>alter database recover managed standby database cancel; #取消redo應用

Database altered.

查詢主庫是否支持switchover操作

Primary> select switchover_status from v$database;

SWITCHOVER_STATUS
----------------------------------------
TO STANDBY

查詢備庫是否支持switchover操作

StandBy> select switchover_status from v$database;

SWITCHOVER_STATUS
----------------------------------------
NOT ALLOWED

not allowed是因為主庫還未切換為standby

switchover，primary切換為物理standby，切換后查看資料庫角色、打開模式、

Primary>alter database commit to switchover to   physical standby;  #將當前primary角色切換到物理standby

Database altered.

Primary>shutdown immediate;
ORA-01507: database not mounted


ORACLE instance shut down.
Primary>startup
ORACLE instance started.

Total System Global Area 3290345472 bytes
Fixed Size            2217832 bytes
Variable Size         1795164312 bytes
Database Buffers     1476395008 bytes
Redo Buffers           16568320 bytes
Database mounted.
Database opened.
Primary>select open_mode  from v$database;

OPEN_MODE
----------------------------------------
READ ONLY

Primary>select database_role from v$database;

DATABASE_ROLE
--------------------------------
PHYSICAL STANDBY

Primary>

物理standby切換為primary

StandBy>select switchover_status from v$database;

SWITCHOVER_STATUS
----------------------------------------
TO PRIMARY

StandBy> alter database commit to switchover to primary;   #standby切換到primary

Database altered.

StandBy>alter database open;

Database altered.

StandBy>select open_mode from v$database;

OPEN_MODE
----------------------------------------
READ WRITE

StandBy>select database_role from v$database;

DATABASE_ROLE
--------------------------------
PRIMARY

StandBy>

常用查詢

 

1、查詢行程的活動狀態

select process,client_process,sequence#,status from v$managed_standby;

2、查詢redo應用進度

select dest_name,archived_thread#,archived_seq#,applied_thread#,applied_seq#,db_unique_name from v$archive_dest_status where status ='VALID';

3、查詢歸檔檔案路徑及創建資訊

select name,creator,sequence#,applied,completion_time from v$archived_log;

4、查詢歸檔歷史

select first_time,first_change#,next_change#,sequence# from v$log_history;

select thread#,sequence#,applied from v$archived_log;

5、參看資料庫的基本資訊

select database_role,db_unique_name,open_mode,protection_mode,protection_level,switchover_status from v$database;

6、查詢redo應用及redo傳輸服務的活動狀態

select database_role,db_unique_name,open_mode,protection_mode,protection_level,switchover_status from v$database;

7、檢查應用模式

StandBy>select recovery_mode from v$archive_dest_status where dest_id=2;

RECOVERY_MODE
----------------------------------------------
IDLE

取值

idle

managed：

managed real_time_apply：

轉載請註明出處，本文鏈接：https://www.uj5u.com/shujuku/21730.html

標籤：Oracle

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