DG_BROKER_CONFIG_FILE1 & DG_BROKER_CONFIG_FILE2
oracle19c
不推荐的功能
ArchiveLagTarget, DataGuardSyncLatency,LogArchiveMaxProcesses,xixLogArchiveMinSucceedDest, LogArchiveTrace,StandbyFileManagement,DbFileNameConvert, LogArchiveFormat, LogFileNameConvert
LsbyMaxEventsRecorded, LsbyMaxServers,LsbyMaxSga, LsbyPreserveCommitOrder, LsbyRecordAppliedDdl,LsbyRecordSkipDdl,LsbyRecordSkipErrors, and LsbyParameter
不再支持的特性
环境准备
网络配置
创新互联建站服务项目包括宁河网站建设、宁河网站制作、宁河网页制作以及宁河网络营销策划等。多年来,我们专注于互联网行业,利用自身积累的技术优势、行业经验、深度合作伙伴关系等,向广大中小型企业、政府机构等提供互联网行业的解决方案,宁河网站推广取得了明显的社会效益与经济效益。目前,我们服务的客户以成都为中心已经辐射到宁河省份的部分城市,未来相信会继续扩大服务区域并继续获得客户的支持与信任!
--主备参考,主要注意GLOBAL_DBNAME,db_unique_name+DGMGRL
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = mydbdg)
(ORACLE_HOME = /u01/app/oracle/product/19.0.0/dbhome_1)
(SID_NAME = mydbdg)
)
(SID_DESC =
(GLOBAL_DBNAME = mydbdg_DGMGRL)
(ORACLE_HOME = /u01/app/oracle/product/19.0.0/dbhome_1)
(SID_NAME = mydbdg)
)
)
参数,用户环境
--主端执行即可
--解锁dg用户,必须赋权sysdg权限,否则因无法写入密码文件而无法远程等。
select username,SYSBACKUP, SYSDG from V$PWFILE_USERS;
alter user sysdg identified by oracle account unlock;
grant sysdg to sysdg;
select username,SYSBACKUP, SYSDG from V$PWFILE_USERS;
--修改参数,主备库
alter system set dg_broker_start=true;
--测试连接
[oracle@node216 admin]$ dgmgrl
DGMGRL for Linux: Release 19.0.0.0.0 - Production on Tue Feb 18 15:14:07 2020
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
Welcome to DGMGRL, type "help" for information.
DGMGRL> connect sysdg
Password:
Connected to "mydb19c"
Connected as SYSDG.
DGMGRL> connect sysdg@mydbdg
Password:
Connected to "MYDBDG"
Connected as SYSDG.
DGMGRL>
开始配置
create configuration 'mycdb' as primary database is 'mydb19c' connect identifier is mydb19c;
--查看
DGMGRL> show configuration;
Configuration - mycdb
Protection Mode: MaxPerformance
Members:
mydb19c - Primary database
Fast-Start Failover: Disabled
Configuration Status:
DISABLED
--备端清除远程信息,不然报错,后续切换时该参数自动设置
alter system set LOG_ARCHIVE_DEST_2='';
Add database 'mydbdg' as connect identifier is mydbdg maintained as physical;
--检查配置信息
DGMGRL> show configuration;
Configuration - mycdb
Protection Mode: MaxPerformance
Members:
mydb19c - Primary database
mydbdg - Physical standby database
Fast-Start Failover: Disabled
Configuration Status:
DISABLED
--查看数据库相信配置信息
SHOW DATABASE VERBOSE 'South_Sales'
--修改参考命令
EDIT DATABASE 'South_Sales' SET PROPERTY 'LogArchiveFormat'='log_%t_%s_%r_%d.arc';
EDIT DATABASE 'South_Sales' SET PROPERTY 'StandbyArchiveLocation'='/archfs/arch/';
DGMGRL> ENABLE CONFIGURATION;
Enabled.
DGMGRL> show configuration;
Configuration - mycdb
Protection Mode: MaxPerformance
Members:
mydb19c - Primary database
mydbdg - Physical standby database
Fast-Start Failover: Disabled
Configuration Status:
SUCCESS (status updated 6 seconds ago)
DGMGRL>
--检查数据库信息
DGMGRL> show database 'mydbdg';
Database - mydbdg
Role: PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag: 0 seconds (computed 0 seconds ago)
Apply Lag: 0 seconds (computed 0 seconds ago)
Average Apply Rate: 3.00 KByte/s
Real Time Query: ON
Instance(s):
mydbdg
Database Status:
SUCCESS
DGMGRL> show database 'mydb19c';
Database - mydb19c
Role: PRIMARY
Intended State: TRANSPORT-ON
Instance(s):
mydb19c
Database Status:
SUCCESS
主备切换
--验证主数据库
DGMGRL> VALIDATE DATABASE 'mydb19c';
Database Role: Primary database
Ready for Switchover: Yes
Flashback Database Status:
mydb19c: Off
Managed by Clusterware:
mydb19c: NO
Validating static connect identifier for the primary database mydb19c...
The static connect identifier allows for a connection to database "mydb19c".
--备库
DGMGRL> VALIDATE DATABASE 'mydbdg';
Database Role: Physical standby database
Primary Database: mydb19c
Ready for Switchover: Yes
Ready for Failover: Yes (Primary Running)
Flashback Database Status:
mydb19c: Off
mydbdg : Off
Managed by Clusterware:
mydb19c: NO
mydbdg : NO
Validating static connect identifier for the primary database mydb19c...
The static connect identifier allows for a connection to database "mydb19c".
Current Log File Groups Configuration:
Thread # Online Redo Log Groups Standby Redo Log Groups Status
(mydb19c) (mydbdg)
1 3 2 Insufficient SRLs
Future Log File Groups Configuration:
Thread # Online Redo Log Groups Standby Redo Log Groups Status
(mydbdg) (mydb19c)
1 3 0 Insufficient SRLs
Warning: standby redo logs not configured for thread 1 on mydb19c
Transport-Related Property Settings:
Property mydb19c Value mydbdg Value
NetTimeout 30 300
--其他检查语句
show database VERBOSE 'mydb19c';
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
--------------------
TO STANDBY
SWITCHOVER TO 'mydbdg';
--参考日志
DGMGRL> SWITCHOVER TO 'mydbdg';
Performing switchover NOW, please wait...
Operation requires a connection to database "mydbdg"
Connecting ...
Connected to "MYDBDG"
Connected as SYSDG.
New primary database "mydbdg" is opening...
Operation requires start up of instance "mydb19c" on database "mydb19c"
Starting instance "mydb19c"...
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to "mydb19c"
Connected to an idle instance.
ORACLE instance started.
Connected to "mydb19c"
Database mounted.
Database opened.
Connected to "mydb19c"
Switchover succeeded, new primary is "mydbdg"
select name,database_role,open_mode from v$database;SQL>
NAME DATABASE_ROLE OPEN_MODE
--------- ---------------- --------------------
MYDB19C PHYSICAL STANDBY READ ONLY WITH APPLY
SQL> show pdbs
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 TESTPDB MOUNTED
4 MYPDB MOUNTED
--启动pdb
alter pluggable database mypdb open;
至此,dg broker 配置及切换成功
环境准备
--主备必须开启闪回区
ALTER SYSTEM SET UNDO_RETENTION=3600 SCOPE=SPFILE;
--ALTER SYSTEM SET UNDO_MANAGEMENT='AUTO' SCOPE=SPFILE;
SHUTDOWN IMMEDIATE;
STARTUP MOUNT;
SHOW PARAMETER UNDO;
ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320 SCOPE=BOTH;
ALTER DATABASE ARCHIVELOG;
ALTER SYSTEM SET db_recovery_file_dest_size=10g;
ALTER SYSTEM SET db_recovery_file_dest=/backup/fra;
ALTER DATABASE FLASHBACK ON;
ALTER DATABASE OPEN;
启用
DGMGRL> EDIT DATABASE 'mydb19c' SET PROPERTY 'LogXptMode'='SYNC';
DGMGRL> EDIT DATABASE 'mydbdg' SET PROPERTY 'LogXptMode'='SYNC';
DGMGRL> EDIT CONFIGURATION SET PROTECTION MODE AS MAXAVAILABILITY;
--检查切换目标
DGMGRL> show database 'mydbdg' FastStartFailoverTarget;
FastStartFailoverTarget = 'mydb19c'
--开启
enable fast_start failover;
--启动观察
start observer;
--检查数据库信息
select name,FS_FAILOVER_STATUS,FS_FAILOVER_OBSERVER_PRESENT from v$database;