Data Guard :: Possible To Convert Logical Standby To Physical Standby
Aug 30, 2013
My steps for testing as below:
1.create a primary database
2.duplicate a physical standby database;
3.turn on flashback on both databases.
4.record SCN xxx on physical standby database.
5.convert physical standby to logical standby (using keep identity statement)
6.flashback to logical standby to xxx
7.convert logical standby to physical standby
8.using real time apply I got errors: Fast Parallel Media Recovery enabledManaged Standby Recovery starting Real Time ApplyMRP0:
Background Media Recovery waiting for new incarnation during transient logical upgrade procedure
Errors in file /home ora/ app/ oracle/ diag/ rdbms/ ora11gr1dg/ora11gr1dg/trace/ora11gr1dg_mrp0_10120.trc:ORA-19906: recovery target incarnation changed during recoveryManaged Standby Recovery not using Real Time ApplyErrors in file /home/ ora/app/ oracle/diag/ rdbms/ ora11gr1dg/ ora11gr1dg/ trace/ora11gr 1dg_mrp0_ 10120.trc:ORA-19906: recovery target incarnation changed during recovery
Errors appears every 10 seconds. Seems MPR0 is waiting for new incarnation for a long time. So am I.Standby database incarnation:
List of Database IncarnationsDB Key Inc Key DB Name DB ID STATUS Reset SCN Reset Time-------1 1 ORA11GR1 3853851354 CURRENT 1 08/09/2013 01:02:182 2 ORA11GR1 3853851354 ORPHAN 2127877 08/28/2013 19:22:01 BGV
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Oct 9, 2012
Can we convert a logical standby to physical standby? Yes or No, if yes how ..
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Jul 25, 2013
I have a setup where i have one physical and logical standby from a primary database. In case of switch over between primary and physical database my logical apply gets stopped. Can a logical database be applied from a physical standby ?
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May 26, 2013
I have dataguard configuration operating in maximum availability mode with a local standby db (A - lgwr sync not using real time apply) and a remote standby db (B - lgwr async). I then simualted a crash of my primary database with batch jobs running. Since the stby db A is in lgwr sync option ,all the commited data in the current online redo log has been transmitted to stby A and is present in its stby redo log (Group 2).How do I apply this stby redo log to the remote stby db.
Tried the following methods.
1.ftp the stby redo log to the remote db and tried to regiter it, got an error that it is not completely archived.
2.issued the recover standby database command and supplied the stby redo log when it asked for the sequence in the stby redo, got an error saying there is corruption in a block(tried this option multiple times ended up with the same result.)
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Jul 17, 2013
can i create physical standby database to logical standby database.
my structure
============
primary database--->physical standby-->logical standby
for fail over case ==>physical standby convert to primary and logical standby connected to current primary database.
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Feb 28, 2012
There are two servers.one in HP-UNIX and another is solaris.
I would like to configure a logical standby using oracle 9i...Is it possible in 9i?
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Oct 11, 2013
On next month i will have plan to delete history data on my Primary database, but i still want to keep them in logical standby as the data warehouse. So, how can i skip delete statement from primary database apply to logical standby.
Oracle SQL apply only support for Skip DML but not for keep delete statement
(on 10g and 11g)SQL>exec dbms_logstdby.skip(statement => 'DELETE',schema_name => 'SCOTT', object_name => 'DEPT');BEGIN dbms_logstdby.skip(statement => 'DELETE',schema_name => 'SCOTT', object_name => 'DEPT'); END; *ERROR at line 1:ORA-06550: line 1, column 7:PLS-00306: wrong number or types of arguments in call to 'SKIP'ORA-06550: line 1, column 7:PL/SQL:
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Sep 8, 2010
Can i create logical_stand_by for windows server 2008, the primary data base is HP UX , both operating systems are 64 bits and data bases are Oracle 10g 10.2.0.1.0.
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Jul 24, 2012
I am not able to find any document that shows steps to create a SINGLE INSTANCE LOGICAL STANDBY database for a 2 NODE ORACLE RAC database. I have found documents for RAC to Single Instance Physical standby database. But not for Logical Standby.
Details:
OS: Redhat 5
DB: 10.2.0.4(shared file system, not using ASM/Standby also file system)
Status: Single instance physical standby database created, need to convert it to Logical standby.
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Sep 22, 2010
I have to implement Physical standby using same SID. parameters required to set on Primary and standby. Also what entries are required to do in TNS file. Recently we have faced hardware failure.
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Apr 14, 2010
I working on a Production Environment, where our Database is running on a IBM-AIX platform.I need to implement Logical standby database for reporting purposes, in order to improve the performance.Now the transaction and the reporting is done at the same site itself.I want to know that, operating system and platform architecture (RAM size, no. of CPUs, ORACLE_HOME etc..) on the primary and standby systems must be same or can be different. complete configuration for Dataguard. My os version is,
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
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Oct 9, 2012
I have One Production and one logical standby database . Due to tape problem we are unable to take backups of primary . And due to business , we cannot take back up on disk in hot period(Bank database ) .
If i take logical standby database backup(level 0 ) using RMAN , then will i be able to restore it on production dtbs (In case Production down) ? . Logical standby is in sync with primary .
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Jun 4, 2010
I have an issue whereby our standby instance was down for a couple of days and when it came back online we found an archivelog file was missing, so recovery only happened up to a point. It appears that the archivelog was deleted therefore we are unable to continue with this standby. We are now planning to rebuild the standby database. As far as i know all of the steps originally performed need not be performed to complete this task.
1. Shutdown standby
2. Delete all datafiles & redo logs
3. Copy over datafiles to respective directories
4. Copy online logs and archivelogs to standby.
5. Create a control file for standby database
6. Startup mount standby database
7. start redo apply
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Mar 10, 2011
I did the all necessary steps required for the physical standby configuration. My standby db is mounted but not able to open.
Below are the steps.
SQL> startup mount
ORACLE instance started.
Total System Global Area 1845493760 bytes
Fixed Size 2021568 bytes
Variable Size 452986688 bytes
Database Buffers 1375731712 bytes
Redo Buffers 14753792 bytes
Database mounted.
SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_2='SERVICE=demodb' scope=both;
System altered.
SQL> ALTER SYSTEM SET LOG_ARCHIVE_DEST_STATE_2=ENABLE SCOPE=BOTH;
System altered.
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
Database altered.
SQL> recover managed standby database cancel;
Media recovery complete.
SQL> alter database open read only;
alter database open read only
*
ERROR at line 1:
ORA-16004: backup database requires recovery
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '/u002/app/OraDB10g/stdemo/oradata/system01.dbf'
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH; ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [kcrfrsetnab_found], [1], [136], [],
[], [], [], []
ORA-00600: internal error code, arguments: [kcrfrgv_scn7], [], [], [], [], [],
[], []
SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [kccocx_01], [], [], [], [], [], [],
[]
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Sep 17, 2013
Today, I am learning dataguard 11.2.0.1. The docs said:A. Monitoring Standby DB Application of redo logs may be monitored by issuing the SQL command:
SQL> select client_dbid, process, sequence#, status from v$managed_standby;
In the primary database, the sequence# with the status “WRITING” would refer to the current redo log sequence#In the standby database, if the status of the process MRPO is “APPLYING LOG” and the status of the process LGWR is “IDLE”, then application of redo logs is up to dateI see that that MRPO at standby is "WAIT_FOR_GAP". How do I resolve this gap.
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Sep 17, 2012
DB1 <Primary> - Production
DB2 <Physial Standby> - DR
I will need to startup my DB2 in DR segment for testing.If i perform the below, will it affect my Production DB? I need it to be up and running as well.
DR:
recover managed standby database cancel;
shutdown immediate;
startup nomount;
alter database mount standby database;
recover standby database until cancel;
alter database activate standby database;
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Jul 24, 2013
I have a setup where i have one physical and logical standby from a primary database. In case of switch over between primary and physical database my logical apply gets stopped. Can a logical database be applied from a physical standby ?
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Nov 23, 2011
I have set up a single instance standbys for rac databases. Now, I need to offload the backups from the primary on to the standbys.
1. cancel managed recovery
2. connect to target(standby) and catalog and backup the standby
3. put standby in managed recovery mode.
I think following these steps, I can restore primary(?). Now, My question is, how can I use these standby backups to clone/refresh databases? I tried it by connecting to target(primary), catalog and auxiliary but rman is using the primary backups instead of standby's to refresh the auxiliary database.
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Dec 7, 2010
Suddenly I can't open any of my physical standby databases read only. Alert log snippet and trace files follow post. I'm running 9.2.0.1.0 on all hosts, which are running AIX 5.2. I've successfully opened all physical standby databases read only numerous times in the past. solve this? Is it possible that these standby databases cannot be switched over to primary should the need arise?
Here's how I typically open a physical standby database read only:
alter database recover managed standby database cancel;
alter database open read only;
Errors in file /ora/product/9.2.0.1.0/rdbms/log/icps1_ora_27382.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-16000: database open for read-only access
[code]...
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Mar 29, 2011
I am trying to configure physical standby(s) across two boxes. I am getting the errors
ORA-12154: TNS:could not resolve service name
ORA-16055: FAL request rejected
I am able to communicate between the two servers, tnsping both of them, sqlplus to each of the instances, but getting the TNS issue.
Tue Mar 29 13:21:55 2011
ARC0: Evaluating archive log 6 thread 1 sequence 73594
ARC0: Destination LOG_ARCHIVE_DEST_2 archival not expedited
ARC0: Beginning to archive log 6 thread 1 sequence 73594
Creating archive destination LOG_ARCHIVE_DEST_3: '/tmp_archive_dest/DLXMTY/arch_
DLXMTY_1_73594.dbf'
Creating archive destination LOG_ARCHIVE_DEST_1: '/archives/DLXMTY/arch_DLXMTY_1
_73594.dbf'
[code]....
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Feb 6, 2013
Is it possible to set a physical standby between 2 servers with same OS but different level ? I mean primary has windows 2003 SP1 and Standby has windows 2003 SP2. I want to know if it will work properly or not.
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Sep 29, 2010
I have one primary database and one physical standby database on my data guard environment.
Now i want one more physical standby database in my data guard environment, meaning i want 2 physical standby. since this is a production environment, i need to take great care. However, downtime will be mandatory.
[u]init.ora for production:[/u]
pup2.__db_cache_size=6241124352
pup2.__java_pool_size=33554432
pup2.__large_pool_size=134217728
pup2.__oracle_base='/oracle/app/oracle'#ORACLE_BASE set from environment
pup2.__pga_aggregate_target=5771362304
[code]......
init.ora for my first primary standby
pup2.__db_cache_size=6509559808
pup2.__java_pool_size=33554432
pup2.__large_pool_size=67108864
pup2.__oracle_base='/oracle/app/oracle'#ORACLE_BASE set from environment
pup2.__pga_aggregate_target=5502926848
[code].......
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May 9, 2013
I have Oracle database on Oracle 10g R2 with physical as well as logical standby database.
1) Is is necessary to take Physical standby database backup?
2) If 1) yes then Which RMAN backup is preferred?with catalog or default?How to take backup as different location?
3)how to Restore that backup?How to ensure backup is valid?
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Dec 6, 2011
If I use Grid to create a physical standby, how does Grid copy the data to the standby server?
The live database is about 1Tb and the standby is at a different site. Does Grid compress this data at all? What mechanism does it use?
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Jul 1, 2012
Can i setup physical standby without RMAN? I want to create a fresh single physical standby without RMAN .. If i copy all files in another system and take the controlfile from primary as alter database create controlfile for standby ... and fill all the gaps with archives.. Should it work ? i am on 10G Rhel 4 linux.. and both machines would have same config
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Jul 17, 2012
step by step procedure to configure physical standby database.....
i have to create on windows not in linux...so simple step by step procedure,once configured it should be up and running;
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Feb 21, 2013
I am using data guard and a physical standby database.How to assign backups on physical standby database to reduce the load on Primary database.
environment: windows
Database version:11.2.0.1.0
What are the pro and cons on assigning RMAN backups jobs to physical standby database?
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Aug 29, 2013
,I have a test environment with Primary DB Server, Physical Standby and Logical Standby.The Logical Standby DB (cur_log_stdb) is backed up every evening by RMAN and I have a question:If I recover my Logical Standby DB from backup and switch replication to new Logical Standby DB (new_log_stdb) it will work or not?My steps e.g.:1. Make a new server for my new_log_stdb and repair structure of catalogs;2. Repair listener.ora and tnsnames.ora files from cur_log_stdb to new_log_stdb;3.
Restore DB with RMAN from backup to new_log_stdb;4. On cur_log_stdb execute "alter database stop logical standby apply";5. Change a DNS name from cur_log_stdb to new_log_stdb;6. On new_log_stdb execute "alter database start logical standby apply immediate";I'm not sure that archivelogs will apply to the new_log_stdb for period since rman backup was created. Configuration:Oracle Linux 6.4Oracle Database 11.2.0.3Primary and Physical with Data Guard
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Nov 20, 2009
Are there redo generate during truncate operation even my primary database is in FORCE LOGGGING mode? How this will effect on physical standby database.
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Dec 29, 2012
which of the following views on the physical standby will us correct information on synchronization with Primary database?
For example, when I checked v$archived_gap it did not return any rows but the max(applied_seq#) on v$archive_dest_status was lagging far behind from the max(sequence#) on Primary database
select max(applied_seq#) from v$archive_dest_status where dest_id=2;
select max(sequence#) from v$archived_log where applied='YES';
select * from v$archive_gap;
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