19.13备库duplicate恢复新主库(二)
问题描述：主备两个库不在同一个机房，此时想从这一套库中在复制一套可读可写的新库出来。网络带宽要求比较高，需要从备库中使用备份在起一个新库，也要测试下使用duplicate从备库能够在复制一个新库。经过测试，使用备份和duplicate都可以从备库中恢复新库。
下面使用duplicate恢复新主库，通过搭建级联DG的方式，主库传输归档到备库1，备库1在传输归档到备库2。后面也可以进行拆分，通过备库1恢复的备库2，调整主库归档路径变成主库把归档直接分发给备库2，实现一主两从的改造。
1.环境介绍
利用实时备库级联DG搭建，利用duplicate在线进行新库恢复
|
IP |
oracle版本 |
oracle_sid |
db_unique_name |
角色 |
|
192.168.163.25 |
19.13 |
orcl |
orcl |
主库 |
|
192.168.163.45 |
19.13 |
orclstd |
orclstd |
备库 |
|
192.168.163.47 |
19.13 |
orclstd2 |
orclstd2 |
新主库 |
2. 备库1配置
--查看备库状态
- SQL> select open_mode,protection_mode,database_role,switchover_status from v$database;
- OPEN_MODE PROTECTION_MODE DATABASE_ROLE SWITCHOVER_STATUS
- -------------------- -------------------- ---------------- --------------------
- READ ONLY WITH APPLY MAXIMUM PERFORMANCE PHYSICAL STANDBY NOT ALLOWED
- SQL>
- SQL> select process, status, thread#,sequence#, block#, blocks from v$managed_standby;
- PROCESS STATUS THREAD# SEQUENCE# BLOCK# BLOCKS
- --------- ------------ ---------- ---------- ---------- ----------
- ARCH CLOSING 1 54 1 1120
- DGRD ALLOCATED 0 0 0 0
- DGRD ALLOCATED 0 0 0 0
- ARCH CLOSING 1 55 1 2
- ARCH CLOSING 1 40 1 2
- ARCH CLOSING 1 48 1 2
- RFS WRITING 1 56 12477 1
- RFS IDLE 1 0 0 0
- LNS WRITING 1 56 12476 1
- MRP0 APPLYING_LOG 1 56 12476 245760
- DGRD ALLOCATED 0 0 0 0
- 11 rows selected.
2.1修改参数
- --修改orclstd参数，这里使用dest_2或者dest_3都可以
- alter system set log_archive_config='dg_config=(orcl,orclstd,orclstd2)';
alter system set log_archive_dest_3='service=orclstd2 async valid_for=(standby_logfile,standby_role) db_unique_name=orclstd2';
- --查看orclstd参数配置
- SQL> set linesize 500 pages 0
- col value for a90
- col name for a50
- select name,value from v$parameter where name in ('db_name','db_unique_name','log_archive_config','log_archive_dest_1','log_archive_dest_2','log_archive_dest_state_1','log_archive_dest_state_2','remote_login_passwordfile','log_archive_format','log_archiveSQL> _max_processes','fal_server','db_file_name_convert','log_file_name_convert','standby_file_management');SQL> SQL>
- db_file_name_convert /oradata/ORCL/, /oradata/orclstd/
- log_file_name_convert /oradata/ORCL/, /oradata/orclstd/
- log_archive_dest_1 location=/home/oracle/flashdata/ORCLSTD/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_U
- NIQUE_NAME=orclstd
- log_archive_dest_2 SERVICE=orclstd LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orclstd
- log_archive_dest_state_1 enable
- log_archive_dest_state_2 enable
- fal_server orcl
- log_archive_config dg_config=(orcl,orclstd,orclstd2)
- log_archive_format %t_%s_%r.dbf
- log_archive_max_processes 4
- standby_file_management AUTO
- remote_login_passwordfile EXCLUSIVE
- db_name orcl
- db_unique_name ORCLSTD
- 14 rows selected.
2.2创建pfile
- create pfile='/tmp/initorclstd2.ora' from spfile;
2.3配置tnsname
- [oracle@19c-dg:dbs]>$cat ../network/admin/tnsnames.ora
- orcl =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.25)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orcl)
- )
- )
- orclstd =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.45)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orclstd)
- )
- )
- orclstd2 =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.47)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orclstd2)
- )
- )
2.4传输文件
传输pfile，密码文件到备库2
3. 备库2配置
3.1 pfile修改
- [oracle@19c-duplicate admin]$ cat ../../dbs/initorclstd2.ora
- orclstd2.__data_transfer_cache_size=0
- orclstd2.__db_cache_size=343932928
- orclstd2.__inmemory_ext_roarea=0
- orclstd2.__inmemory_ext_rwarea=0
- orclstd2.__java_pool_size=79691776
- orclstd2.__large_pool_size=4194304
- orclstd2.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
- orclstd2.__pga_aggregate_target=192937984
- orclstd2.__sga_target=771751936
- orclstd2.__shared_io_pool_size=37748736
- orclstd2.__shared_pool_size=289406976
- orclstd2.__streams_pool_size=0
- orclstd2.__unified_pga_pool_size=0
- *._optimizer_cartesian_enabled=FALSE
- *.audit_file_dest='/u01/app/oracle/admin/orclstd2/adump'
- *.audit_trail='NONE'
- *.compatible='19.0.0'
- *.control_files='/oradata/orclstd2/control01.ctl','/oradata/orclstd2/control02.ctl'
- *.db_block_size=8192
- *.db_create_file_dest='/oradata'
- *.db_name='orcl'
- *.db_recovery_file_dest_size=16106127360
- *.db_recovery_file_dest='/home/oracle/flashdata'
- *.db_unique_name='ORCLSTD2'
- *.deferred_segment_creation=FALSE
- *.diagnostic_dest='/u01/app/oracle'
- *.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
- *.event='10949 trace name context forever:28401 trace name context forever,level 1:10849 trace name context forever, level 1:19823 trace name context forever, level 90'
- *.fal_client='orclstd2'
- *.fal_server='orclstd'
- *.log_archive_config='dg_config=(orcl,orclstd,orclstd2)'
- *.log_archive_dest_1='location=/home/oracle/flashdata/ORCLSTD/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=orclstd2'
- *.log_archive_dest_2='SERVICE=orclstd LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orclstd'
- *.log_archive_format='%t_%s_%r.dbf'
- *.nls_language='AMERICAN'
- *.nls_territory='AMERICA'
- *.open_cursors=300
- *.pga_aggregate_target=184m
- *.processes=300
- *.remote_login_passwordfile='EXCLUSIVE'
- *.result_cache_max_size=0
- *.sga_target=735m
- *.standby_file_management='AUTO'
- *.undo_tablespace='UNDOTBS1'
3.2 监听配置
- [oracle@19c-duplicate admin]$ cat listener.ora
- LISTENER =
- (DESCRIPTION_LIST =
- (DESCRIPTION =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.47)(PORT = 1521))
- )
- )
- SID_LIST_LISTENER =
- (SID_LIST =
- (SID_DESC =
- (GLOBAL_DBNAME = orclstd2)
- (ORACLE_HOME = /u01/app/oracle/product/19.0.0.0/dbhome_1)
- (SID_NAME = orclstd2)
- )
- )
- ADR_BASE_LISTENER = /u01/app/oracle
- --打开监听
- lsnrctl start
3.3 tnsname配置
- [oracle@19c-duplicate admin]$ cat tnsnames.ora
- orcl =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.25)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orcl)
- )
- )
- orclstd =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.45)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orclstd)
- )
- )
- orclstd2 =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.47)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orclstd2)
- )
- )
tnsname验证
备库1和备库2互相验证
- [oracle@19c-dg:dbs]>$tnsping orclstd
- TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 16-NOV-2022 20:48:05
- Copyright (c) 1997, 2021, Oracle. All rights reserved.
- Used parameter files:
- Used TNSNAMES adapter to resolve the alias
- Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.45)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = orclstd)))
- OK (30 msec)
- [oracle@19c-dg:dbs]>$tnsping orclstd2
- TNS Ping Utility for Linux: Version 19.0.0.0.0 - Production on 16-NOV-2022 20:48:06
- Copyright (c) 1997, 2021, Oracle. All rights reserved.
- Used parameter files:
- Used TNSNAMES adapter to resolve the alias
- Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.47)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = orclstd2)))
- OK (0 msec)
3.4 创建目录
- mkdir -p相关目录
/home/oracle/flashdata/ORCLSTD/archivelog- /oradata/orclstd2
- /u01/app/oracle/admin/orclstd2/adump
- /home/oracle/flashdata
3.5rman在线创建二级备库
- [oracle@19c-duplicate archivelog]$ rman target sys/oracle@orclstd auxiliary sys/oracle@orclstd2
- Recovery Manager: Release 19.0.0.0.0 - Production on Wed Nov 16 18:59:06 2022
- Version 19.13.0.0.0
- Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved.
- connected to target database: ORCL (DBID=1646277430)
- connected to auxiliary database: ORCL (not mounted)
- RMAN>
- RMAN> duplicate target database for standby from active database dorecover nofilenamecheck;
- Starting Duplicate Db at 2022-11-16 18:59:17
- 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
- current log archived at primary database
- current log archived at primary database
- contents of Memory Script:
- {
- backup as copy reuse
- passwordfile auxiliary format '/u01/app/oracle/product/19.0.0.0/dbhome_1/dbs/orapworclstd2' ;
- }
- executing Memory Script
- Starting backup at 2022-11-16 19:03:47
- allocated channel: ORA_DISK_1
- channel ORA_DISK_1: SID=43 device type=DISK
- Finished backup at 2022-11-16 19:03:48
- duplicating Online logs to Oracle Managed File (OMF) location
- duplicating Datafiles to Oracle Managed File (OMF) location
- contents of Memory Script:
- {
- restore clone from service 'orclstd' standby controlfile;
- }
- executing Memory Script
- Starting restore at 2022-11-16 19:03:48
- using channel ORA_AUX_DISK_1
- channel ORA_AUX_DISK_1: starting datafile backup set restore
- channel ORA_AUX_DISK_1: using network backup set from service orclstd
- channel ORA_AUX_DISK_1: restoring control file
- channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:02
- output file name=/oradata/orclstd2/control01.ctl
- output file name=/oradata/orclstd2/control02.ctl
- Finished restore at 2022-11-16 19:03:52
- contents of Memory Script:
- {
- sql clone 'alter database mount standby database';
- }
- executing Memory Script
- sql statement: alter database mount standby database
- contents of Memory Script:
- {
- set newname for clone tempfile 1 to new;
- switch clone tempfile all;
- set newname for clone datafile 1 to new;
- set newname for clone datafile 3 to new;
- set newname for clone datafile 4 to new;
- set newname for clone datafile 7 to new;
- restore
- from nonsparse from service
- 'orclstd' clone database
- ;
- }
- executing Memory Script
- executing command: SET NEWNAME
- renamed tempfile 1 to /oradata/ORCLSTD2/datafile/o1_mf_temp_%u_.tmp in control file
- executing command: SET NEWNAME
- executing command: SET NEWNAME
- executing command: SET NEWNAME
- executing command: SET NEWNAME
- Starting restore at 2022-11-16 19:03:56
- using channel ORA_AUX_DISK_1
- channel ORA_AUX_DISK_1: starting datafile backup set restore
- channel ORA_AUX_DISK_1: using network backup set from service orclstd
- channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_AUX_DISK_1: restoring datafile 00001 to /oradata/ORCLSTD2/datafile/o1_mf_system_%u_.dbf
- channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:16
- channel ORA_AUX_DISK_1: starting datafile backup set restore
- channel ORA_AUX_DISK_1: using network backup set from service orclstd
- channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_AUX_DISK_1: restoring datafile 00003 to /oradata/ORCLSTD2/datafile/o1_mf_sysaux_%u_.dbf
- channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:01:16
- channel ORA_AUX_DISK_1: starting datafile backup set restore
- channel ORA_AUX_DISK_1: using network backup set from service orclstd
- channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_AUX_DISK_1: restoring datafile 00004 to /oradata/ORCLSTD2/datafile/o1_mf_undotbs1_%u_.dbf
- channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:15
- channel ORA_AUX_DISK_1: starting datafile backup set restore
- channel ORA_AUX_DISK_1: using network backup set from service orclstd
- channel ORA_AUX_DISK_1: specifying datafile(s) to restore from backup set
- channel ORA_AUX_DISK_1: restoring datafile 00007 to /oradata/ORCLSTD2/datafile/o1_mf_users_%u_.dbf
- channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:03
- Finished restore at 2022-11-16 19:06:46
- contents of Memory Script:
- {
- switch clone datafile all;
- }
- executing Memory Script
- datafile 1 switched to datafile copy
- input datafile copy RECID=9 STAMP=1120936006 file name=/oradata/ORCLSTD2/datafile/o1_mf_system_kq9jwx0b_.dbf
- datafile 3 switched to datafile copy
- input datafile copy RECID=10 STAMP=1120936006 file name=/oradata/ORCLSTD2/datafile/o1_mf_sysaux_kq9jz8rk_.dbf
- datafile 4 switched to datafile copy
- input datafile copy RECID=11 STAMP=1120936006 file name=/oradata/ORCLSTD2/datafile/o1_mf_undotbs1_kq9k1omp_.dbf
- datafile 7 switched to datafile copy
- input datafile copy RECID=12 STAMP=1120936006 file name=/oradata/ORCLSTD2/datafile/o1_mf_users_kq9k23xg_.dbf
- contents of Memory Script:
- {
- set until scn 3192644;
- recover
- standby
- clone database
- noredo
- delete archivelog
- ;
- }
- executing Memory Script
- executing command: SET until clause
- Starting recover at 2022-11-16 19:06:46
- using channel ORA_AUX_DISK_1
- Finished recover at 2022-11-16 19:06:46
- contents of Memory Script:
- {
- delete clone force archivelog all;
- }
- executing Memory Script
- released channel: ORA_DISK_1
- released channel: ORA_AUX_DISK_1
- allocated channel: ORA_DISK_1
- channel ORA_DISK_1: SID=43 device type=DISK
- specification does not match any archived log in the repository
- Finished Duplicate Db at 2022-11-16 19:07:34
3.6打开数据库验证
此时数据库状态，从主库把归档发送到备库1，备库1把归档在传回备库2上，备库不开启实时应用，只传输归档，不应用归档
- orclstd2:
- SQL> alter database open;
- SQL> select status,instance_name from v$instance;
- STATUS INSTANCE_NAME
- ------------ ----------------
- OPEN orclstd2
- SQL> select open_mode,protection_mode,database_role,switchover_status from v$database;
- OPEN_MODE PROTECTION_MODE DATABASE_ROLE SWITCHOVER_STATUS
- -------------------- -------------------- ---------------- --------------------
- READ ONLY MAXIMUM PERFORMANCE PHYSICAL STANDBY NOT ALLOWED
- orclstd:
- SQL> select open_mode,protection_mode,database_role,switchover_status from v$database;
- OPEN_MODE PROTECTION_MODE DATABASE_ROLE SWITCHOVER_STATUS
- -------------------- -------------------- ---------------- --------------------
- READ ONLY WITH APPLY MAXIMUM PERFORMANCE PHYSICAL STANDBY NOT ALLOWED
- orcl:
- SQL> select open_mode,protection_mode,database_role,switchover_status from v$database;
- OPEN_MODE PROTECTION_MODE DATABASE_ROLE SWITCHOVER_STATUS
- -------------------- -------------------- ---------------- --------------------
- READ WRITE MAXIMUM PERFORMANCE PRIMARY TO STANDBY
orcl切换归档
- SQL> archive log list;
- Database log mode Archive Mode
- Automatic archival Enabled
- Archive destination /archivelog
- Oldest online log sequence 54
- Next log sequence to archive 56
- Current log sequence 56
- SQL>
- SQL> alter system switch logfile;
- System altered.
- SQL> /
- System altered.
- SQL> /
- System altered.
- SQL>
- SQL> archive log list;
- Database log mode Archive Mode
- Automatic archival Enabled
- Archive destination /archivelog
- Oldest online log sequence 57
- Next log sequence to archive 59
- Current log sequence 59
- SQL>
orclstd2:
- SQL> select process, status, thread#,sequence#, block#, blocks from v$managed_standby;
- PROCESS STATUS THREAD# SEQUENCE# BLOCK# BLOCKS
- --------- ------------ ---------- ---------- ---------- ----------
- ARCH CONNECTED 0 0 0 0
- DGRD ALLOCATED 0 0 0 0
- DGRD ALLOCATED 0 0 0 0
- ARCH CLOSING 1 58 1 4
- ARCH CLOSING 1 56 12288 1382
- ARCH CLOSING 1 57 1 2
- RFS IDLE 1 0 0 0
- RFS IDLE 1 59 106 1
- RFS IDLE 0 0 0 0
- 9 rows selected.
- [oracle@19c-duplicate admin]$ cd /home/oracle/flashdata/ORCLSTD/archivelog/
- [oracle@19c-duplicate archivelog]$ ll
- total 10984
- -rw-r-----. 1 oracle oinstall 3655680 Nov 16 19:09 1_53_1118496696.dbf
- -rw-r-----. 1 oracle oinstall 573952 Nov 16 19:18 1_54_1118496696.dbf
- -rw-r-----. 1 oracle oinstall 1536 Nov 16 19:18 1_55_1118496696.dbf
- -rw-r-----. 1 oracle oinstall 6999040 Nov 16 20:55 1_56_1118496696.dbf
- -rw-r-----. 1 oracle oinstall 1536 Nov 16 20:55 1_57_1118496696.dbf
- -rw-r-----. 1 oracle oinstall 2560 Nov 16 20:55 1_58_1118496696.dbf
3.7 开启实时同步
- SQL> alter database recover managed standby database using current logfile disconnect from session;
- 此时主库相当于两个备库
4.测试主库到备库2
关闭备库1，主库的归档就传不到备库2了。如果在主库直接添加远程传输路径到备库2，备库2是不是还是可以正常接收归档以及应用呢
orcl：
- alter system set log_archive_config='dg_config=(orcl,orclstd,orclstd2)';
- alter system set log_archive_dest_3='SERVICE=orclstd2 LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orclstd2';
- alter system set log_archive_dest_state_3=enable;
添加tnsname
- orcl =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.25)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orcl)
- )
- )
- orclstd =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.45)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orclstd)
- )
- )
- orclstd2 =
- (DESCRIPTION =
- (ADDRESS_LIST =
- (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.163.47)(PORT = 1521))
- )
- (CONNECT_DATA =
- (SERVICE_NAME = orclstd2)
- )
- )
orclstd2添加tns
关闭备库1，查看主库到备库2的同步情况，可以正常同步以及应用
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