farsync 简易测试

rdbms 12.2.0.1 

已经安装好的dg，增加一个节点，改为farsync模式。

参考文档：

Using Far Sync Instances (oracle.com)

12c新特性 - Active Data Guard Far Sync (oracle.com)

database_role	dbname	db_unique_name	IP
primary	test	test	192.168.2.81
standby	test	test_stdby	192.168.2.80
farsync	test	farsync	192.168.2.82

-- 创建farsync实例的控制文件 ，并copy到farsync主机所在的机器上

alter database create far sync instance controlfile as '/tmp/control01.ctl';

 -- 修改主库的LOG_ARCHIVE_CONFIG，LOG_ARCHIVE_DEST_1，LOG_ARCHIVE_DEST_2   

alter system set log_archive_config = 'DG_CONFIG=(test,farsync,test_stdby)'	;    -- 变为3个 
alter system set log_archive_dest_1 = 'LOCATION=/u01/archive_log VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=test'   -- 不变
alter system set log_archive_dest_2 = 'SERVICE=farsync ASYNC AFFIRM VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=farsync'   -- 变为指向farsync 

--修改备库的LOG_ARCHIVE_CONFIG、LOG_ARCHIVE_DEST_1，LOG_ARCHIVE_DEST_2

alter system set log_archive_config = 'DG_CONFIG=(test,farsync,test_stdby)'	;    -- 变为3个 
alter system set log_archive_dest_1 = 'LOCATION=/u01/archive_log VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=test_stdby'	-- 不变 
alter system set log_archive_dest_2 ='SERVICE=test ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=test'  -- 不变 
alter system set fal_server = 'farsync','test' ;   -- 变为2个  

-- 配置farsync实例 

alter system set db_unique_name = farsync scope=spfile;


alter system set DB_FILE_NAME_CONVERT='test','farsync','test_stdby','farsync' scope=spfile ;
alter system set LOG_FILE_NAME_CONVERT='test','farsync','test_stdby','farsync' scope=spfile ;
alter system set FAL_SERVER=test scope=spfile ;
alter system set LOG_ARCHIVE_CONFIG='DG_CONFIG=(test,farsync,test_stdby)' scope=spfile ;

alter system set log_archive_dest_1 = 'LOCATION=/u01/archive_log VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=farsync'  scope=spfile ;
alter system set log_archive_dest_2 ='SERVICE=test_stdby ASYNC VALID_FOR=(STANDBY_LOGFILES,STANDBY_ROLE) DB_UNIQUE_NAME=test_stdby' scope=spfile ;

-- 配置listener.ora 和tnsnames.ora (略)

-- 启动farsync，先根据原来的主备库生成farsync实例的pfile，修改一些参数后，生成spfile，启动到mount状态(过程略，主要上面farsync实例的一些参数)

startup mount ;

-- 查看farsync实例状态 

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

[email protected]>select protection_mode,database_role,protection_level,open_mode from v$database;

PROTECTION_MODE      DATABASE_ROLE    PROTECTION_LEVEL     OPEN_MODE
-------------------- ---------------- -------------------- --------------------
MAXIMUM PERFORMANCE  FAR SYNC         MAXIMUM PERFORMANCE  MOUNTED

[email protected]>

-- 检查配置 

select * from v$dataguard_config;

[email protected]>select * from v$dataguard_config;

DB_UNIQUE_NAME                 PARENT_DBUN                    DEST_ROLE         CURRENT_SCN     CON_ID
------------------------------ ------------------------------ ----------------- ----------- ----------
FARSYNC                        test                           FAR SYNC INSTANCE    11753274          0
test_stdby                     FARSYNC                        PHYSICAL STANDBY     11753274          0
test                           NONE                           PRIMARY DATABASE            0          0

[email protected]>

-- farsync上备份归档日志（在farsync节点上，是可以对归档日志进行处理的）

[[email protected]_farsync /u01]$rman target /

Recovery Manager: Release 12.2.0.1.0 - Production on Fri Nov 26 14:49:30 2021

Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.

connected to target database: TEST (DBID=2361166120, not open)

RMAN> backup archivelog all;

Starting backup at 26-NOV-21
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=251 device type=DISK
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=30 RECID=1 STAMP=1089625843
input archived log thread=1 sequence=31 RECID=2 STAMP=1089625845
channel ORA_DISK_1: starting piece 1 at 26-NOV-21
channel ORA_DISK_1: finished piece 1 at 26-NOV-21
piece handle=/u01/app/oracle/product/12.2.0/dbhome_1/dbs/3n0f598a_1_1 tag=TAG20211126T144946 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 26-NOV-21

RMAN-06497: warning: control file is not current, control file AUTOBACKUP skipped

RMAN> 

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