Duplicate複製數據庫並建立物理StandBy（pfile版本）

時間 2020-01-02

標籤 duplicate 複製數據庫建立物理 standby pfile 版本欄目 SQL 简体版

原文原文鏈接

1設定環境以下：java

Primary數據庫sql

IP	172.17.22.16
SID	orcl

Standby數據庫數據庫

IP	172.17.22.17
SID	orcl

設置提示，以區分操做的位置服務器

primary數據庫網絡

set SQLPROMPT Primary>

standby數據庫session

set SQLPROMPT StandBy>

一、Primary端設置歸檔模式+強制日誌

確保primary數據庫運行在歸檔模式oracle

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>

開啓強制日誌app

Primary>select force_logging from v$database;

FOR
---
NO Primary>alter database force logging; Database altered.

二、standby端建立相關目錄

爲了和Primary庫保存相同的結構，咱們須要在Standby數據庫創建相同的目錄，首先查詢現有Primary數據庫的相關目錄dom

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數據庫服務器建立相同的目錄tcp

[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

三、建立輔助實例密鑰文件

方法一：直接從Primary數據庫複製密鑰文件過來

[oracle@oracledb dbs]$ scp orapworcl 172.17.22.17:/usr/oracle/app/product/11.2.0/dbhome_1/dbs
oracle@172.17.22.17'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;

四、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內容以下

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誌 *.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端從新啓動

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爲主服務器的網絡服務名 fal_server string tns_standby

複製生成的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. oracle@172.17.22.17's password: initorcl.ora 100% 1291 1.3KB/s 00:00 [oracle@oracledb dbs]$

修改standbyd端的initorcl.ora文件，內容以下

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爲已歸檔日誌 *.LOG_ARCHIVE_DEST_STATE_2=ENABLE #備用的鏈接到主的能夠開啓,由於此時主同步日誌到備未啓用 *.FAL_SERVER=tns_primary *.FAL_CLIENT=tns_standby *.STANDBY_FILE_MANAGEMENT=AUTO

經過複製的pfile建立Standby數據庫的spfile

StandBy> create spfile from pfile;

File created.

啓動到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

五、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. #紅色字體爲靜態監聽,後面duplicate須要用到靜態監聽註冊 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

啓動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

六、配置網絡服務名，並測試互通性

Primary端和StandBy端都要進行以下配置：

tns_primary =
  (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.16)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = db_primary) ) ) tns_standby = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.17.22.17)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME =StandBy ) ) )

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

SERVICE_NAME 的值參考lsnrctl的輸出，確保用sqlplus工具或者navicact工具可以鏈接SERVICE_NAME

由於fal_server 會使用服務名，若是配置不正確，這歸檔日誌沒法正常發送

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

在primary端和standby端都進行測試（爲了角色切換）

[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 = (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 = (SERVER = DEDICATED) (SERVICE_NAME = orcl))) OK (0 msec)

七、duplicate standby

rman鏈接兩個數據庫

[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)

開始複製

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端切換下日誌，重寫執行rman duplicate便可

View Code

八、啓用日誌傳送

Primary>show parameter LOG_ARCHIVE_DEST_STATE_2

NAME                     TYPE            VALUE
------------------------------------ ---------------------- ------------------------------
log_archive_dest_state_2 string DEFER #當前主的還未啓用 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.

八、驗證結果

查詢primary數據庫角色

Primary>select database_role from v$database;

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

查詢standby數據庫角色

StandBy>select database_role from v$database;

DATABASE_ROLE
--------------------------------
PHYSICAL STANDBY StandBy>

primary端插入一條數據

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：啓動redo應用; 暫停redo應用 ; 打開數據庫; 查詢數據是否被同步過來了

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; #打開數據庫 Database altered. StandBy>select open_mode from v$database; #standby是隻讀狀態 OPEN_MODE ---------------------------------------- READ ONLY StandBy>

見證奇蹟的時刻

StandBy>select * from scott.dept;

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

九、啓用實時應用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、大小爲50M, 咱們增長四組，每組1個member，大小爲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端作相同的操做

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'; #之前此處爲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';

啓用實時StandBy端redo應用

StandBy>alter database recover managed standby database using current logfile  disconnect from session;   #由於更改爲了LGWR來傳遞,因此須要使用實時

驗證：

首先在Primay端插入一條數據：

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.

十、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操做

Primary> select switchover_status from v$database;

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

查詢備庫是否支持switchover操做

StandBy> select switchover_status from v$database;

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

not allowed是由於主庫還未切換爲standby

switchover，primary切換爲物理standby，切換後查看數據庫角色、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切換爲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>

經常使用查詢

一、查詢進程的活動狀態

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

二、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';

三、查詢歸檔文件路徑及建立信息

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

四、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;

五、參看數據庫的基本信息

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

六、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;

七、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：

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