Creaton of Standby database and dataguard broker

Hi Experts,
I am using Linux with Oracle version 11gR2. We have planned to create a physical standby database and also configure dataguard broker for the standby database.
Also, I've read the documents that active dataguard is a feature on 11g. Is it not possible on 10g ?
Can someone please provide me the steps to create the standby database and configure the dataguard broker.

Hello;
A simple Data Broker setup would be :
On both Primary and Standby sites, change the initialization parameter in the spfile to enable the Data guard broker.
SQL> Alter system set dg_broker_start=True scope=both;
On the PRIMARY site, open the ‘cmd’ and start Command Line Interface (CLI) of the Dataguard Broker (DGMGRL).
/home/oracle:PRIMARY >dgmgrl
DGMGRL for Linux: Version 11.2.0.1.0 - 64bit Production
DGMGRL> connect sys/password@PRIMARY
Create broker configuration.
DGMGRL> create configuration ‘broker1’ as
primary database is 'PRIMARY'
connect identifier is primary;Configuration "?broker1?" created with primary database "PRIMARY"
DGMGRL>
(‘primary’ in Connect identifier is the service name through which the broker is connected to the PRIMARY database)
Add Standby Database to the above configuration.
DGMGRL> add database 'standby' as
connect identifier is 'STANDBY'
maintained as physical;
Database "standby" added
(‘to_standby’ in Connect identifier is the service name through which the broker is connected to the STANDBY database)
Now the configuration has been set up but it is still disabled. You can view the configuration by executing:
DGMGRL> show configuration
The next step is to ENABLE the configuration ‘broker1’.
DGMGRL> enable configuration;
Enabled.
Again view the configuration.
DGMGRL> show configuration
Configuration - ?broker1?
Protection Mode: MaxPerformance
Databases:
PRIMARY - Primary database
standby - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESSIn my humble opinion its a good idea to setup Data Guard without Broker and get the "feel" of it first.
Remember, once you setup Broker, you cannot use SQL to change your Data Guard setup.
Best Regards
mseberg

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Next log sequence to archive in Standby Database (RAC Dataguard Issue)

Hi All,
I just had implemented Data Guard in our server. My primary Database is RAC configured, but it is only single node. The other Instance was removed and converted it to Developement Instance. For the reason I kept the primary as RAC is when I will implement dataguard, my Primary Database is RAC with 7 nodes.
The first test is successful, and I was able to "switchover" from my primary to standby. I failed in the 'FAILOVER" test.
I restore my primary server and redo the setup.
BTW, my standby DB is physical standby.
When I try to switchover again and issue archive log list, below is my output.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 38
*Next log sequence to archive 0*
Current log sequence 38
SQL> select open_mode, database_role from v$database;
OPEN_MODE DATABASE_ROLE
MOUNTED PHYSICAL STANDBY
===============================================
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
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OPEN_MODE DATABASE_ROLE
READ WRITE PRIMARY
In my first attempt to switchover before I failed in "FAILOVER" test, I also issue +archive log list+ in both primary and standby database, and if I remember it right, next log sequence on both should be identical. Am I right on this?
Thanks in Advance.
Jay A

Or Am i just overthinking on this?
Is dataguard only looking for the current and oldest log sequence?

Difference between physical standby database and Data Guard

Hi guys,
Today I attended one interview. They asked me a difference between the Oracle Physical Standby database and Oracle Dataguard?
Upto my knowledge Oracle Physical Standby Database is one type of Standby Database can be configured using Oracle Databaguard Feature.
Can you people calrify me on this.
Regards,
Vijayaraghavan K

hello,
yes you are right upto some extent...here is para form oracle doc
Oracle Data Guard is the most effective and comprehensive
data availability, data protection, and disaster recovery solution
for enterprise databases. It provides the management, monitoring,
and automation software infrastructure to create and maintain one
or more synchronized standby databases to protect data from failures,
disasters, errors, and corruptions.
Data Guard standby databases can be located at remote disaster
recovery sites thousands of miles away from the production data center,
or they may be located in the same city, same campus,
or even in the same building. If the production database
becomes unavailable because of a planned or an unplanned outage,
Data Guard can switch any standby database to the production role,
thus minimizing downtime and preventing any data loss.oracle data guard is maximum availiblity solution which maintain physical standby databases and in case of failure of production can switch production role to and standby database.
read it here
http://www.oracle.com/technology/deploy/availability/htdocs/DataGuardOverview.html
thanks and regards
VD
Edited by: Dixit on Aug 31, 2009 1:35 AM
Edited by: Dixit on Aug 31, 2009 1:36 AM

How to create physical standby database without dataguard

Hi,
Can anyone please help me how to create Physical Standby Database without dataguard. As i am using Oracle 10.2.0.1 Standard Edition for production databases.
Please find the specifications of my server :
Database : Oracle 10.2.0.1(Standard Edition)
Server : Linux 4.0(32 bit machine)
As we know that Dataguard cannot be created in Standard Edition as we dont have that option in this edition. So please help me how to create the physical standby database.
Thanks in advance.
Regards,
Farooq

Hello,
I hope this link helps you out...
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/rcmbackp.htm
http://www.dbasupport.com/oracle/ora10g/manual_standby.shtml
Thanks & Regards
Pratik Lakhpatwala
Jr Oracle DBA
Edited by: Pratik.L on Dec 31, 2009 12:03 PM

SECURITY PATCH ON STANDBY DATABASE AND PRIMARY DATABASE

I have a question on applying CPU on standby and primary database
I have a standby database on machine2 and primary on machine1
I applied a CPU patch on the Oracle Home of Standby database and
did not run the catcpu.sql as standbydatabase is in mount state.
Now i am going to apply the CPU patch on primary database.
What i need to confirm is that after i apply the patch on primary database oracle home
and run the cat cpu.sql on that do i have to do anything on the standby database
for instance rebuilding it or something or the change would be shipped to the standby
server automatically.
The purpose is to have the primary and standby database on the same patch level
in case of a failover
Please let me know asap

Any one has any idea on this. Any ideas would be appreciated

Creating physical standby databases with DG Broker & OEM

Hi guys,
I manage 8i, 9i & 10g databases through OEM 10.2.0.2.
Today, I would like to create physical standby db for the most important applications. Because I'm a lazy guy, I'd like to do it the easiest way, with GUI and wizzards provided by OEM.
1. Do you know any tutorial on the Internet that would help to do it easily ? My only source up to now is the official DB broker documentation (http://download.oracle.com/docs/cd/B19306_01/server.102/b14230/toc.htm), which is 300 pages long like every Oracle doc. I'd appreciate any tutorial that could lead me straight to the essential. I've heard that is not so tricky to create a physical standby db
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thank you for your help
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Antionio,
Oracle Documentation is the best source of configuring any Oracle component.
But, If you do not want to read the entire doc, and want to configure Dataguard Broker (without OEM), then here is the Link.
http://www.oracledba.org/10g/dr/10gR2_dataguard_RAC_to_RAC.html#Configure_Dataguard_Broker:

Not able to get data of primary in standby database (configured dataguard)

Hi all, I configured dataguard in my local system, i ve a few qsns (as i am new, ve patience)
1) scn differs wrt primary in standby (i checked, 1day difference), how to make scn same?
2)i created a table in primary, its not refelecting in standby, (below i ve pasted alertlog entries)
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 2 - see DBWR trace file
ORA-01110: data file 2: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\SYSAUX01.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 3 - see DBWR trace file
ORA-01110: data file 3: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\UNDOTBS01.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 4 - see DBWR trace file
ORA-01110: data file 4: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\USERS01.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 5 - see DBWR trace file
ORA-01110: data file 5: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\EXAMPLE01.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 6 - see DBWR trace file
ORA-01110: data file 6: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\STREAM_TBS.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 7 - see DBWR trace file
ORA-01110: data file 7: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\DATA01.DBF'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
ORA-16004 signalled during: alter database open read only...
3)wen i try to open standby database in read only mode gives below error..how do i solve it?
ERROR at line 1:
ORA-16004: backup database requires recovery
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1:
'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\SYSTEM01.DBF'

971424 wrote:
Hi all, I configured dataguard in my local system, i ve a few qsns (as i am new, ve patience)
1) scn differs wrt primary in standby (i checked, 1day difference), how to make scn same?Please do not use IM language here, instead of "qsns" use questions.
SCN can be differ in standby and it can be behind to primary based on the backup you have restored. Of course by performing recovery you can synchronize standby with primary database. You can use incremental backups for standby using link http://www.oracle-ckpt.com/rman-incremental-backups-to-roll-forward-a-physical-standby-database-2/
2)i created a table in primary, its not refelecting in standby, (below i ve pasted alertlog entries)
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:\oracle11g\app\administrator\diag\rdbms\stand\stand\trace\stand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 2 - see DBWR trace file
ORA-01110: data file 2: 'D:\ORACLE11G\APP\ADMINISTRATOR\ORADATA\STAND\SYSAUX01.DBF'
ORA-27041: unable to open fileFirst check whether those files are exist in that location or not and if file names are different other than primary then rename file locations. Also check the permissions on the folder/files.

Creating standby database and replication of primary database in 9i

Hi,
We have a 9i database on Windows Server.Now recently we are planning to replicate the primary database to standby database once after creating the standby database.Can anyone guide me with the procedure or documentation with this . We were asked to do this without the data guard set-up. Please do help me regarding this ASAP.
Regards,

specifiying ASAP isnt a way to get people to help on a volunteer forum.
If you dont have dataguard You need to search for "manual standby apply".
lots and lots and lots of google hits for you but this is the official cookbook
http://docs.oracle.com/cd/B10500_01/server.920/a96653/manual_recovery.htm

Test physical standby database in dataguard

Hi all,
I had a successfull dataguard implementation for oracle 9r2.
Primary and standby databases are on different nodes, logs from primay are shipping and applying to physical standby database successfully.
As these database are for oracle 11i ebs, so for testing dataguard status i had created a table manually having columns date and remarks. Periodically i insert few records in this table in primary database and then chek this tabel in standby database (by opening in read only mode).
Now i want to test physical standby database with applications tier but don't want to disturb origional primary database.
as these are the normal switchover steps
1) at primary db
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;
2) at standby
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
3) at primary, now this will be the stand by database
SHUTDOWN IMMEDIATE;
STARTUP MOUNT;
4) at standby, now this will be the primary database
SHUTDOWN IMMEDIATE;
STARTUP
My concern is if i skip step 1 and 3 and only execute step 2 and 4, will that be applicable for my requirement, or there is some other way to achieve this goal.
Regards,
Ken

To avoid touching the primary production DB, you may try to use the following command on your standby database side:
alter database activate standby database;
This will turn your standby database to primary database, however the log will be reset and this means you will need to rebuild your DR.
Another way is to use flash back feature on your standby database, activate it and revert back to the flashback point when the DR testing is done.

Logical Standby Database and XMLDB

I couldn't find a proper group to post this message and thought I would try here.
I want to set up a Logical Standby Database for our production database server 9.2.0.4.0 with XMLDB. I am having problem with some system tables that were created when I registered some XML schemas.
These tables are in the standby database but Oracle complains the object does not exist.
Any idea?

>
The "may be" is because I have tested flashback of a physical standby to before resetlogs, but not a logical standby.
>
A physical standby keeps the DBID of the primary - a logical standby does not. That is exactly the problem that restricts the reconversion into physical from logical, and you did not encounter that problem.
>
I haven't used "keep identity" but from what I read it relates to "convert to physical" not "flashback database".
>
Exactly. And that is what the OP wants to do: convert to physical (from logical).
You mentioned that this might be possible with flashback.
Problem: During the conversion from physical to logical, the DBID gets changed unless you specify (in 11g) KEEP IDENTITY. This would make it possible to reconvert into phyiscal from logical.
In short: If there is no solution for the changed DBID of the logical standby in order to flashback it into physical as you suggested, then it is not possible .
When I saw your first answer, I thought that you might have a solution in mind in order to solve that obvious problem. Sorry for having bothered you.
Kind regards
Uwe
http://uhesse.wordpress.com

Standby Database and Server Mode

Hi gurus,
Can the client TNSNAMES.ORA file specify Server=Shared for a primary and standby configuration? Or does it have to be Dedicated to make the switchover/failover work?
Thanks a lot.
Ben

as document says
The connect descriptor must also specify that a dedicated server be used.
Khurram

Database upgrade in Dataguard Broker Environment

Hi All,
OS: Wndows 32 bit
DB: 11.2.0.1
We have an upgrade activity due, in this, we have a windows Primary Database and it has 2 Physical Standby databases. There is no concept of Near DR and Far DR. Both the databases are getting sync'd directly from the Primary database.We are also using Dataguard Broker. Following is the skeletol POA for the same:
1. Install an out of place DATABASE Software (11.2.0.3 ) on both the Standby databases and also the Primary database.
2.Disable the configuration of the database broker on all the 3 servers
3.Copy the files init/spfile, tnsnames.ora, listener.ora, sqlnet.ora and the password file from the old oracle home to the new oracle home location on all the 3 servers.
4.Take a clean shutdown of the Standby databases only and then stop the services and delete the services as well.
5.Get into the new oracle home and create the oracle services for both the standby databases
6.Once, the services are created, mount both the standby databases and enable their recovery.
7. Now, we will connect to the Priamry database server and start the upgrade here. I will be using the manuall method of upgrade for the database here which all includes all the pre and post tasks.
8. Once the upgrade is done succesfully on the primary databases, the changes will be automatically replicated on its 2 Standby databases as well.
9. Post this, we will enable the broker configuration and check for the syncronziation by doing some switch's.
10. Lastly we will remove the old oracle home's.
Any suggestions?
Regards,
SPhinx

After the upgrade the home directory will change and all I need to do is change the home directory path in the extract/replicate prm file correct ?
this what I will do :
1. stop GG services on both source and target
2. upgrade the db.
3. change the path of the db in the prm files as required.
4. start the extract and replicate process on source and target respectively.

OEM and Standby Database

I have not tried but I believe OEM does not automate creation of standby database be it physical or logical. Does it ?

I m on 10.2.0.4 , Solaris os. I saw lot of forum questions on standby databse creation where folks have run into some errors while creating the standby db. No body mentioned that they are getting into errors while creating standby db through OEM or any other kind of automation from Oracle. It seems that all of them were trying to create the standby db manually by ollowing the procedure that Oracle recommends.
Also, is data guard free ? Can I have a standby database without dataguard ? From the procedure, it looks like all you have to do is
creata a log archive destination of type service on the primary so that log can be shipped on the other side. Where does data guard comes in picture?
I am sorry if I sound dumb here but I am new to standby database and stuff like that.

Creating Standby database with Oracle 10gR2 SE (no dataguard). Procedure

Hello,
I have problems in creating a standby database without Dataguard (Oracle Standard Edition)
-Oracle 10gR2 SE (No DataGuard !!!!)
- SUSE Enterprise 10.
Both primary and standby databases are running in Virtual machines (lab).
I will describe the exact steps I followed :
1.---------------------------------------------------
Both primary and standby databases have exactly the same file / folder structure
2.---------------------------------------------------
I enabled archive log mode with a new destination : /opt/oracle/oradata/orcl/archive_logs.
Also : SQL> alter database force logging;
3.---------------------------------------------------
I shut down the primary database (shutdown immediate)
4.---------------------------------------------------
I created a standby controlfile on the primary database:
SQL> startup mount
SQL> alter database create standby controlfile as '/tmp/standby.ctl'
SQL> shutdown immediate
5.---------------------------------------------------
I did a cold backup from the primary db to the standby db
(I copied all the db files, control files, redo log)
6.---------------------------------------------------
I copied from the primary db to the standby db the standby control file
(from primary /tmp/standby.ctl)
7.---------------------------------------------------
I copied from the primary db to the standby db the standby control file
(from primary /tmp/standby.ctl)
8.---------------------------------------------------
I created on the standby database a pfile from the spfile :
SQL> create pfile from spfile;
9.---------------------------------------------------
I edited the pfile and changed the controlfile location (with the standby controlfile created in step 4)
>>>>> *.control_files='/opt/oracle/oradata/orcl/standby.ctl'
10.--------------------------------------------------
I started the standby db
SQL> startup mount pfile='/opt/oracle/product/10.2/db_1/dbs/initorcl.ora'
SQL> alter database recover managed standby database disconnect from session;
SQL> quit
11.--------------------------------------------------
I made some changes on the primary db on user scott
SQL> update table set .......
12.--------------------------------------------------
I switched logfile on the primary db
SQL> alter system switch logfile;
13.--------------------------------------------------
I manually copied the new archivelog to the standby db
And then nothing !!!
The db changes are not applied.
Please help me fix the procedure !!!
Thanks

Hi
Ref to your Oracle SE Standby issue, we were in similar situation couple of years ago to build an Automated Standby for our disaster recovery on Oracle SE. We finally got a solution provider Anbul Technologies , they have a one of their solutions based on Oracle SE which provided fully automated Standby in Oracle SE.
We are successfully running that solution in our prod env for many years. You can visit their site www.anbultechnologies.co.uk or contact them for further details. They are Uk based but provides support and services all over Europe.
Cheers

How to find the timestamp and SCN in the standby database?

Hai,
I have Oracle 9.2.0.4 RAC with 2 nodes in the production. The logs generated at these servers will be manully moved to my standby database and will be applied. To know what isthe maximum log files applied in the standby database, i am using the below mentioned query in the standby database,
Select thread#,max(sequence#) from v$log_history group by thread#
In general i am using "recover standby database until cancel" command and then checking the database with the above mentioned query whether all the logs are applied or not.
If i use time based or scn based recovery in standby database i.e., "recover standby database until time <time>" or "recover standby database until change <scn number>" , after completion of the recovery, apart from the message "Media recovery complete" or by seeing the alert log, is there any way to query the standby database, so that i can identify the time or scn upto which the archived redo log files got applied.

Hi Sridhar,
There should be some view which will have applied_scn information. There is one more option i can suggest, you can create a heart beat table in production with 2 column like scn and timestamp. Update this table every minute. From standby db you can query this table and get fair idea on applied_scn and timestamp.
While exporting you can export using flashback_scn by taking the value from heartbeat table of standby.
This heartbeat table is used very common in streams environment. Just see if this helps you.
hth,
http://borndba.com

Creaton of Standby database and dataguard broker

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