Configuration management
1.
Change
parameter, database property using DGMGRL
We will change the property
'StandbyFileManagement' for database ORCL2 to AUTO from MANUAL which is default
setting for the parameter STANDBY_FILE_MANAGEMENT.
edit database orcl2 set
property 'StandbyFileManagement'='AUTO';
DGMGRL> show database verbose orcl2
Database - orcl2
Role: PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag: 0 seconds
Apply Lag: 0 seconds
Real Time Query: OFF
Instance(s):
orcl2
Properties:
DGConnectIdentifier =
'orcl2'
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 = '4'
LogArchiveMinSucceedDest =
'1'
DbFileNameConvert =
'orcl1, orcl2'
LogFileNameConvert =
'orcl1, orcl2'
FastStartFailoverTarget =
''
StatusReport =
'(monitor)'
InconsistentProperties =
'(monitor)'
InconsistentLogXptProps =
'(monitor)'
SendQEntries =
'(monitor)'
LogXptStatus =
'(monitor)'
RecvQEntries =
'(monitor)'
HostName =
'dg3'
SidName =
'orcl2'
StaticConnectIdentifier =
'(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dg3)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=orcl2_DGMGRL)(INSTANCE_NAME=orcl2)(SERVER=DEDICATED)))'
StandbyArchiveLocation =
'USE_DB_RECOVERY_FILE_DEST'
AlternateLocation =
''
LogArchiveTrace =
'0'
LogArchiveFormat =
'%t_%s_%r.dbf'
TopWaitEvents = '(monitor)'
Database Status:
SUCCESS
We can change the ‘LogXptMode’
property as below. This will update the LOG_ARCHIVE_DEST_n parameter
appropriately.
edit database [orcl1|orcl2] set property
logxptmode=SYNC;
2.
Change
the broker configuration file location
The location of the broker
configuration files is determined by the parameters DG_BROKER_CONFIG_FILEn
(where n in {1,2}).
Default location is $ORACLE_HOME/dbs
Default names of configuration
files are: dr{1|2}<db_unique_name>
CHANGING CONFIG FILE LOCATION:
The location of the configuration
file can only be changed when DMON is not running.
·
set DG_BROKER_START=FALSE
·
alter system set DG_BROKER_CONFIG_FILEn=new
loc;
·
manually move files at OS level to new location
IF old/new location is ASM, use DBMS_FILE_TRANSFER.COPY_FILE
·
start DMON process
3.
Change
DB STATEs
Turn off redo apply,
edit
database orcl2 set STATE='APPLY-OFF';
Activate active DG aka REAL TIME QUERY,
edit
database orcl2 set STATE='APPLY-OFF';
SQL>
alter database open;
edit
database orcl2 set STATE='APPLY-ON';
DGMGRL>
show database orcl2
Database
- orcl2
Role: PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag: 0 seconds
Apply Lag: 0 seconds
Real Time Query: ON
Instance(s):
orcl2
Database
Status:
SUCCESS
4. Change protection mode
a) Configure
the SRL if necessary
b) Set
LogXptMode aptly
edit database orcl1 set
property 'LogXptMode'='SYNC';
edit database orcl2 set
property 'LogXptMode'='SYNC';
c) now
change the mode for the ENTIRE CONFIGURATION
edit
configuration set protection mode as MaxAvailability;
Effects:
In
the STANDBY alert log:
RFS[6]:
Assigned to RFS process 7356
RFS[6]: Identified
database type as 'physical standby': Client is LGWR SYNC pid 4753
Primary database is in
MAXIMUM AVAILABILITY mode
Changing standby
controlfile to MAXIMUM AVAILABILITY mode
Standby controlfile
consistent with primary
RFS[6]: Selected log 4
for thread 1 sequence 65 dbid 1224670660 branch 840221191
Recovery of Online Redo
Log: Thread 1 Group 4 Seq 65 Reading mem 0
Mem# 0:
/u01/app/oracle/oradata/orcl2/srl04.log
Wed Mar 12 01:05:58
2014
RFS[7]: Assigned to RFS
process 7366
RFS[7]: Identified
database type as 'physical standby': Client is ARCH pid 4817
On the PRIMARY Site
SQL> select dest_id,
dest_name, status, affirm, transmit_mode, process from v$archive_dest where
status != 'INACTIVE';
DEST_ID DEST_NAME STATUS AFF TRANSMIT_MOD PROCESS
----------
------------------------------ --------- --- ------------ ----------
1
LOG_ARCHIVE_DEST_1 VALID NO
SYNCHRONOUS ARCH
2
LOG_ARCHIVE_DEST_2 VALID YES PARALLELSYNC LGWR
On STANDBY site :
SQL> select dest_id,
dest_name, status, affirm, transmit_mode, process from v$archive_dest where
status != 'INACTIVE';
DEST_ID DEST_NAME STATUS AFF TRANSMIT_MOD PROCESS
----------
------------------------------ --------- --- ------------ ----------
1
LOG_ARCHIVE_DEST_1 VALID NO
SYNCHRONOUS ARCH
2
LOG_ARCHIVE_DEST_2 VALID NO
ASYNCHRONOUS LGWR
32
STANDBY_ARCHIVE_DEST VALID YES SYNCHRONOUS RFS
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