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Oracle EBS DataGuard setup

2022-07-02 07:12:00 【Virtuous time】

One . environmental information

The database software has been installed

primary

Database version ：11.2.0.3
whether RAC:N
Instance name ：pri

standby

Database version ：11.2.0.3
whether RAC:N
Instance name ：std

db_name Generally, it is consistent with the main database

modify hosts file

At two nodes /etc/hosts Add the host names of both parties and IP Mapping .

Two . Main warehouse operation

Check the online log

SELECT thread#, group#, bytes / 1024 / 1024
  FROM v$log;

SELECT *
  FROM v$logfile;

Ensure that log archiving is turned on

SQL> archive log list;
Database log mode              No Archive Mode
Automatic archival             Disabled
Archive destination            /data/ebs/pri/db/apps_st/data/archive
Oldest online log sequence     5738
Current log sequence           5739
-- If not, close the data and start to mount Later, the mode starts archiving 
SQL> alter database archivelog;
-- Open database 
SQL> alter database open;

The main database is configured to force archiving

alter database force logging;

increase standby Log group

ALTER DATABASE add standby logfile GROUP 3 ('/data/ebs/pri/db/apps_st/data/log03a_std.dbf','/data/ebs/pri/db/apps_st/data/log03b_std.dbf') size 1000m;

ALTER DATABASE add standby logfile GROUP 4 ('/data/ebs/pri/db/apps_st/data/log04a_std.dbf','/data/ebs/pri/db/apps_st/data/log04b_std.dbf') size 1000m;

ALTER DATABASE add standby logfile GROUP 5 ('/data/ebs/pri/db/apps_st/data/log05a_std.dbf','/data/ebs/pri/db/apps_st/data/log05b_std.dbf') size 1000m;

Create a password file in the main library

# Be careful ORACLE_SID  Case write 
orapwd file=orapwpri password=oracle force=y
scp orapwPRI [email protected]:/data/ebs/std/db/tech_st/11.2.0/dbs/orapwSTD

# Guarantee  remote_login_passwordfile  Parameters  = EXCLUSIVE .
 adopt  sqlplus sys/[email protected] as sysdba  To verify that you can log in to each other

Check whether the main library is enabled spfile

SQL> show parameter spfile;

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
spfile                               string      /data/ebs/pri/db/tech_st/11.2.
                                                 0/dbs/spfilePRI.ora

Set main library parameters

alter system set log_archive_config='dg_config=(pri,std)' scope=spfile;#pri、std The main database and the standby database sid

SQL> alter system set log_archive_dest_1='LOCATION=/data/ebs/pri/db/apps_st/data/archive valid_for=(all_logfiles,all_roles) db_unique_name=pri' scope=spfile;

System altered.# This parameter is set , Both mean the file path and db_unique_name Agreement 

SQL> alter system set log_archive_dest_2='SERVICE=std ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=std' scope=spfile;# This parameter is set , Both mean the file path and db_unique_name Agreement 

System altered.

SQL> alter system set log_archive_dest_state_1=enable scope=spfile;

System altered.

SQL> alter system set log_archive_dest_state_2=enable scope=spfile;

System altered.

SQL> alter system set log_archive_max_processes=30 scope=both;

System altered.

SQL> alter system set standby_file_management=auto  scope=spfile;

System altered.

SQL> show parameter db_create_file_dest   

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_create_file_dest                  string
# The above parameter can be set without 

SQL> alter system set db_file_name_convert='/data/ebs/std/db/apps_st/data','/data/ebs/pri/db/apps_st/data' scope=spfile; #（ The second parameter is the local path ）

System altered.

SQL> alter system set log_file_name_convert='/data/ebs/std/db/apps_st/data','/data/ebs/pri/db/apps_st/data' scope=spfile; #（ The second parameter is the local path ）

System altered.

SQL> create pfile from spfile;

File created.

modify tnsnames.ora and listener.ora

# stay tnsnames.ora Finally add 
IFILE=/data/ebs/pri/db/tech_st/11.2.0/network/admin/dg_std_ifile.ora
# And then in dg_std_ifile.ora This file is filled in the end-to-end database tns

STD =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xxx.xx.xx.xx)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = std)
    )
  )

#listener.ora
SID_LIST_PRI =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = pri_DGMGRL)# This line is new , among pri yes db_unique_name
      (ORACLE_HOME= /data/ebs/pri/db/tech_st/11.2.0)
      (SID_NAME = PRI)
    )
  )

3、 ... and . Standby database settings

Set standby database parameters

– Pass in the standby depot spfile establish pfile, Then modify the following parameters


*.db_name='std' 
*.db_unique_name='std' DG Main and standby db_name It has to be consistent ,db_unique_name atypism 
*.log_archive_config='dg_config=(pri,std)' pri Master database SID,std Backup database SID

*.log_archive_dest_1='location=/u01/app/oracle/arch valid_for=(all_logfiles,all_roles) db_unique_name=pri' # Current node path 
*.log_archive_dest_2='service=pri valid_for=(online_logfiles,primary_role) db_unique_name=pri' # Information of the peer main database 

*.log_archive_dest_state_1=enable

*.log_archive_dest_state_2=enable

*.log_archive_max_processes=4

*.fal_server='std' # Of the opposite end main database SID

*.fal_client='pri' # Current node information 

*.db_file_name_convert='/u01/app/oracle/oradata/std','/u01/app/oracle/oradata/pri' # The first directory is the path of the peer-to-peer main library , The second is the current node path 

*.log_file_name_convert='/u01/app/oracle/oradata/std','/u01/app/oracle/oradata/pri' # The first directory is the backup database data file path （ This directory exists on the backup server ）, The second is the main database data file path 

*.standby_file_management='auto'

Start in the standby database to nomount

SQL> startup nomount
ORACLE instance started.

Total System Global Area 1.0689E+10 bytes
Fixed Size                  2237776 bytes
Variable Size            4798286512 bytes
Database Buffers         5872025600 bytes
Redo Buffers               16924672 bytes
SQL> show parameter db_unique_name

NAME                                 TYPE
------------------------------------ ---------------------------------
VALUE
------------------------------
db_unique_name                       string
std
SQL> create spfile from pfile;

File created.

SQL> shutdown immediate
ORA-01507: database not mounted


ORACLE instance shut down.
SQL> startup nomount
ORACLE instance started.

Total System Global Area 1.0689E+10 bytes
Fixed Size                  2237776 bytes
Variable Size            4798286512 bytes
Database Buffers         5872025600 bytes
Redo Buffers               16924672 bytes
SQL> exit

modify tnsnames.ora and listener.ora

# stay tnsnames.ora Finally add 
IFILE=/data/ebs/std/db/tech_st/11.2.0/network/admin/dg_pri_ifile.ora
# And then in dg_std_ifile.ora This file is filled in the end-to-end database tns

PRI =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = xxx.xx.xx.xx)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = pri)
    )
  )

# modify listener.ora
SID_LIST_PRI =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = std_DGMGRL)# Only this line is new , among pri yes db_unique_name, This is for db_broker With 
      (ORACLE_HOME= /data/ebs/pri/db/tech_st/11.2.0)
      (SID_NAME = PRI)
    )
  )

Four . use tnsping Verify configuration

Use tnsping db_unique_name To verify interoperability

5、 ... and . Transfer in the standby database segment

[[email protected] archive]$ rman target sys/[email protected] auxiliary sys/[email protected]

Recovery Manager: Release 11.2.0.3.0 - Production on Fri Aug 20 20:39:24 2021

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: PRI (DBID=269162849)
connected to auxiliary database: PRI (not mounted)

RMAN> duplicate target database for standby from active database nofilenamecheck;

# After completion , Boot to startup state 
alter database open;

Then verify , Configuration to this step has OK 了 , The next step is to configure db_broker, This tool is equivalent to a management tool , One line of command can be used to switch between active and standby , Parameter configuration . Don't knock every node again .

6、 ... and . To verify

-- Switch log test , If it is always stated that OK Of 
-- Main library 
SQL> alter system switch logfile;
SQL>select SEQUENCE#, FIRST_TIME, NEXT_TIME, APPLIED, ARCHIVED from V$ARCHIVED_LOG;

-- For the library 
SQL> select SEQUENCE#, FIRST_TIME, NEXT_TIME, APPLIED, ARCHIVED from V$ARCHIVED_LOG;

7、 ... and . To configure dg broker

Modify the parameters

# Both nodes execute 
alter system set dg_broker_start=true;
# Next, select any node to execute 
create configuration dg as primary database is pri connect identifier is pri;
add database std as connect identifier is std;

The test switch

DGMGRL> show configuration

Configuration - dg

  Protection Mode: MaxPerformance
  Databases:
    pri  - Primary database
    std - Physical standby database

Fast-Start Failover: DISABLED

Configuration Status:
SUCCESS
# The following command is used when the standby database is the primary node 
DGMGRL> switchover to std
Performing switchover NOW, please wait...
New primary database "std" is opening...
Operation requires shutdown of instance "PRI" on database "pri"
Shutting down instance "PRI"...
ORACLE instance shut down.
Operation requires startup of instance "PRI" on database "pri"
Starting instance "PRI"...
ORACLE instance started.
Database mounted.
Database opened.
Switchover succeeded, new primary is "std"
DGMGRL> show configuration

Configuration - dg

  Protection Mode: MaxPerformance
  Databases:
    std - Primary database
    pri  - Physical standby database

Fast-Start Failover: DISABLED

Configuration Status:
SUCCESS

DGMGRL>

An error occurred while switching back ：

DGMGRL> switchover to pri
Performing switchover NOW, please wait...
New primary database "pri" is opening...
Operation requires shutdown of instance "STD" on database "std"
Shutting down instance "STD"...
ORACLE instance shut down.
Operation requires startup of instance "STD" on database "std"
Starting instance "STD"...
Unable to connect to database
ORA-12545: Connect failed because target host or object does not exist

Failed.
Warning: You are no longer connected to ORACLE.

Please complete the following steps to finish switchover:
        start up instance "STD" of database "std"

View the corresponding alert journal

I didn't see the problem .
Look at the configuration information of the database , It happened in StaticConnectIdentifier Are the configured hostname , Check out the main library's /etc/hosts file , It is found that the host name is not configured in , And after , Just switch again .

DGMGRL> show database verbose std

Database - std

  Role:            PHYSICAL STANDBY
  Intended State:  APPLY-ON
  Transport Lag:   0 seconds
  Apply Lag:       0 seconds
  Real Time Query: ON
  Instance(s):
    STD

  Properties:
    DGConnectIdentifier             = 'std'
    ObserverConnectIdentifier       = ''
    LogXptMode                      = 'ASYNC'
    DelayMins                       = '0'
    Binding                         = 'OPTIONAL'
    MaxFailure                      = '0'
    MaxConnections                  = '1'
    ReopenSecs                      = '300'
    NetTimeout                      = '30'
    RedoCompression                 = 'DISABLE'
    LogShipping                     = 'ON'
    PreferredApplyInstance          = ''
    ApplyInstanceTimeout            = '0'
    ApplyParallel                   = 'AUTO'
    StandbyFileManagement           = 'AUTO'
    ArchiveLagTarget                = '0'
    LogArchiveMaxProcesses          = '30'
    LogArchiveMinSucceedDest        = '1'
    DbFileNameConvert               = '/data/ebs/pri/db/apps_st/data, /data/ebs/std/db/apps_st/data'
    LogFileNameConvert              = '/data/ebs/pri/db/apps_st/data, /data/ebs/std/db/apps_st/data'
    FastStartFailoverTarget         = ''
    InconsistentProperties          = '(monitor)'
    InconsistentLogXptProps         = '(monitor)'
    SendQEntries                    = '(monitor)'
    LogXptStatus                    = '(monitor)'
    RecvQEntries                    = '(monitor)'
    SidName                         = 'STD'
    StaticConnectIdentifier         = '(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ifeng-ebs-test-db)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=std_DGMGRL)(INSTANCE_NAME=STD)(SERVER=DEDICATED)))'
    StandbyArchiveLocation          = '/data/ebs/std/db/apps_st/data/archive'
    AlternateLocation               = ''
    LogArchiveTrace                 = '0'
    LogArchiveFormat                = '%t_%s_%r.dbf'
    TopWaitEvents                   = '(monitor)'

Database Status:
SUCCESS

DGMGRL>