Data Guard :: Change Server B To Standby Database With A Running As Primary

Oct 4, 2010

I new to data guard concept.

I am using oracle 10g with data guard configured , I have primary ( A ) and standby database ( B ) .But because of some unavoidable conditions the primary database ( A ) got shutdown and was not starting , We shifted the standby database ( B ) at new location and changed it to primary with following command ,

startup mount;
alter database recover managed standby database finish;
alter database commit to switchover to physical primary;

This new primary ( B ) was open for end users for 2 days during which old primary ( A ) was shutdown .

I took the backup of ( B ) and restored it on A AND shutdown the B . Now A is acting as Primary database. Server B is shutdown . I want to change server B to standby database with A running as Primary .Is it possible ?

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Data Guard :: Change Instance Parameter Of Primary Database And Standby

Nov 29, 2011

I have a requirement to change the instance parameter of the primary database and standby in the data guard. Any procedure to do the same. I have to do it directly on production and there is no test set up so I cannot experiment . The procedure I am thinking of is as below.

1. Stop the standby

2. backup the primary

3. Change the parameter and restart to make it effective

4. Start the primary

5. Go to stand by

6. Change the parameter and mount the database.

7. Check if both are in sync and apply logs if not.

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Data Guard :: Refresh Primary Using Standby Database?

Feb 2, 2013

I was using physical standby but my primary database had had some HW issue.So I had activated standby database to handle production.During 3 months, standby database was our live database and our old primary was unavailable.Now HW issue on primary has been fixed.And I want to set again my old configuration : means set primary and standby db.

I'm trying this :

1) check the SCN on old primary

2) Rman incremantal backup from scn

3) on primary db : catalog

4) on primary db : recover database noredo

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Data Guard :: Upgrade Primary And Standby Database?

Apr 30, 2012

I have a primary and standby DB using data guard want to upgrade oracle to 11G.I know that primary and standby should have same version even if data guard will not work again.I want to know what is the steps by steps action to properly upgrade both DB : primary and Standby.

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Data Guard :: Check If Database Encrypted Or Not On Primary / Standby?

Jul 25, 2013

We have a primary and a standby (Physical Dataguard) site.

1. How do i check if the database is encrypted or not on primary as well as standby ?
2. If primary and standby are encrypted, does the data that gets replicated from primary to standby also in encrypted form ? If not, does it make sense to encrypt that ?

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Data Guard :: Change Some Parameters On Primary Database?

Sep 29, 2012

I am going to change some parameters on primary database (db cache, java pool etc.). I am not sure, if the changes are automaticallly propagated to standby or if I have to make the changes manually on stanby site too? I couldn't find clear answer in documentation. how parameter changes work in dg physical configuration?

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Data Guard :: Flashback Snapshot Standby Database Or New Primary Database After Failover?

Aug 30, 2013

If flashback is enable in physical standby database 1. If we failover at 11AM can I flash back NEW primary database to 6 AM ? 2. if I convert physically standby database to snapshot standby database at 11AM ,  Can I  flashback snapshot standby database to 6 AM and do some works on it (DML operations)  then   converting the snapshot standby database into physical standby database ?  

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Data Guard :: Switch (convert) Primary Database To Standby Database?

Jan 30, 2013

I have installed oracle 11g standard edition one and created both primary and standby database. now i want to know how to switch(convert) primary database to standby database.

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Data Guard :: Unable To Get Data Of Primary In Standby Database (dataguard)

Jan 16, 2013

i have configured physical standby in my local system, to check logshipping i created a table at primary db, wen i tried to check in standby, it says table does not exist..below are primary & standby alert entries..

Primary alert log

Fatal NI connect error 12514, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST= ed)(CID=(PROGRAM=d:oracle11gappadministratorproduct11.1.0db_1inORACLE.EXE)(HOST=A960M)(USER=SYSTEM))(SERVER=dedicated)))
TNS for 64-bit Windows: Version - Production


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Data Guard :: Convert Snapshot Database (standby) Directly To Primary?

Dec 16, 2012

(Oracle 11gR1 OEL 5)Is there any possibility to convert snapshot database (standby) directly to Primary. Instead of manual switchover I want to do this

I have checked that snapshot creates a guaranteed restoration point which reverts back changes in Standby.

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Data Guard :: Query Regarding Standby Database State When Primary Is Down / Unreachable

Feb 20, 2013

I want to know if there is any reflection on the standby database states when it's primary is down or not reachable? I want to use this information from standby node to determine if I can programmatically execute (dgmgrl) failover operation or not? This is considering that the broker configuration has no fast-start failover and no observer enabled/configured.

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Data Guard :: Primary Database Is RAC And Physical Standby Is Single Instance

Mar 27, 2013

I am using Oracle RAC as primary database, we are going to start using Oracle data guard. So I am designing my infrastructure and planing to use Oracle Single instance as my physical stand by database.

My question is it feasible to have my standby database as single instance while the primary is RAC? is it feasible to build my Oracle single instance standby database from the RMAN backup of the RAC primary database? Is there any restrictions (or any points to be taken into consideration) since my primary database is RAC while the physical standby is Oracle single instance?

in the below link


it was mentioned that primary can be RAC or single and same for standby, but my question is it feasible to have primary as RAC while standby as single instance? or it should be like each others?

The primary database can be either a single-instance Oracle database or an Oracle Real Application Clusters (RAC) database. Similar to a primary database, a standby database can be either a single-instance Oracle database or an Oracle RAC database.

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Data Guard :: Unable To Get Data Of Primary In Standby Database

Jan 16, 2013

I configured dataguard in my local system.

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:oracle11gappadministratordiag
dbmsstandstand racestand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 2 - see DBWR trace file


3)wen i try to open standby database in read only mode gives below error..

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:

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Data Guard :: Create Control File With Standby Keyword On Primary Database

Jul 4, 2012

What is difference when you issue a create controlfile with "standby" keyword on the primary database


vs. creating a control using

ALTER DATABASE BACKUP CONTROLFILE to '/path/db_control.ctl';

what does ORACLE put into the standby control that is "extra"? ie. what is the difference between a standby control file and a normal control file?

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Data Guard :: Find Out Number Of Standby Databases Configured For Primary Database From OS Level?

Nov 14, 2013

How can find the number of standby databases configured for primary database from os level

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Data Guard :: How To Change Logical Database Primary To Logical

Jun 9, 2011

We have 2 node (n1 nad n2 ) RAC and 3rd node (n3) with Dataguard logical database for reporting ..

1. logical database (n3) not syn with primary (n1,n2)
2. During repair above mentioned problem by mistake my logical(n3) also become primary
3. now how I will again change my n3 to logical
4. I got following error

RE: ORA-16009: remote archive log destination must be a STANDBY database

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Data Guard :: Getting Standby Host And DB Name From Primary

Oct 25, 2012

I'd like to know the Standby hostname and database name (db_unique_name) from primary using SQL. Simply put, which table in primary datbase gives us the standby host and the database name. I am aware that TNSNAMES.ORA contains details, but we cannot use SQL for that. I am also aware of V$ARCHIVED_LOG's DEST_ID column. But, the DEST_ID will not show the host and the db names, neither does V$PARAMETER's LOG_ARCHIVE_DEST_n if SERVICE parameter is set to Connect Identifier.

If I further paraphrase my problem, how I'd relate a dest_id to a standby host and database using SQL.

SELECT <columns> FROM <v$some_view> WHERE dest_id IN (2, 3);

2            host2           standby_1
3            host3           standby_2DB version : 10g
OS : Solaris 10

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Data Guard :: Primary Not Open After Standby Configuration

Jul 19, 2011

I did standby before and it works wighout any disturbations and even configuration seems to me not very complicated - but it was before. now i am trying to do standby configuration once again. there is database named DESK.

two physical serwers:
sczepl-db07 - primary
r00979 - standby

on each for this serwer there is listener listening on port 1521, and on each is tnsnames configured properly:

for sczepl-db07
(ADDRESS = (PROTOCOL = TCP)(HOST = sczepl-db07)(PORT = 1521))

so why primary don't see standby db and claims that ther is no standby service? i proved that there is connection primary <--> standby.

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Data Guard :: One Primary And 2 Physical Standby Databases

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.__oracle_base='/oracle/app/oracle'#ORACLE_BASE set from environment

init.ora for my first primary standby

pup2.__oracle_base='/oracle/app/oracle'#ORACLE_BASE set from environment

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Data Guard :: RAC Primary To Single Instance Standby Using

Mar 2, 2011


2 NODE RAC Cluster/Linux x86-64/ RDBMS

Standby server:

Brand new box, and I installed (software only)

I have a brand new box set-up for a single-instance standby database, and I have installed software only.

Do I need to patch to before I send a copy of the primary over to be set-up as a standby? If so, how do I patch without having a local database in place as this server will only be used for a standby? Can patching the oracle_home only be done?

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Data Guard :: Running Observer On Different OS As Compared To Primary And Secondary DBs

Jan 28, 2013

Primary RAC and Standby RAC databases are using version They are configured & controlled via Data Guard Broker. Currently, the observer runs from one of the Standby nodes. All are on Solaris x86 64bit OS version 10.

Now, I have to move Observer to 3rd DC and I am looking If I could use another OS for observer instead of same as DB OS version. Why? Our new infrastructure is on RHEL Linux, therefore, I would like to deploy observer once and then wait for existing databases to be upgraded and moved to RHEL. Also, i understand that database and observer software should be of same version e.g. 10g, 11g.

My question is what if i install & configure observer on RHEL ? The end result would be:

1. Primary DB: Solaris 10, Oracle Software binaries version
2. Secondary/Standby DB: Solaris 10, Oracle Software binaries version
3. Observer: RHEL 5.8, Oracle Software binaries version

Is it accepted mix configuration say e.g. to run for six months? Also, it would be grateful to know if there any license implications when running observer on a different node running no databases at all.

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Data Guard :: How To Convert Primary Control File For Standby

Dec 29, 2009

I try to recover standby db from a primary db backup set,but the standby control file is different.

to create primary controlfile by rman:
backup control file format '/home/cur_control';

to create standby controlfile:
backup control file for standby format '/home/std_control';

I want to know if there is method to convert cur_control to std_control.

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Data Guard :: Switchover From Physical Standby To Primary Fails

May 9, 2010

i have a db's in maximum protection mode and i am trying to perform a switchover of physical standby database to primary role. but it failed., the steps followed is as follows. everything is fine with old primary site and the it is now in mounted state. When I went through the log file, I got the error message as "ORA-16072: a minimum of one standby database destination is required".the standby_archive_dest is as follows.

old primary database

SQL> alter system switch logfile;
SQL> alter system archive log current;

old standby database...Disconnect the managed recovery mode in Standby database.

SQL> recover managed standby database cancel;
Media recovery complete.
SQL> recover standby database;
SQL> exit

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Data Guard :: Apply Standby Redo Log To Physical Standby Database

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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Data Guard :: How To Know Current Active Guard Settings In Standby Database

Oct 17, 2012

Controlling User Access to Tables in a Logical Standby Database can be controlled using the following command:


My simple question is: how can I know the current active Guard setting in the standby database?

Oracle 11g R2.

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Data Guard :: Registering Primary Database To Catalog Database

Oct 9, 2012

Here we have a data guard environment with db1(db_unique_name) as primary and db2(db_unique_name) as physical standby database. Also we configured one schema on a third machine as catalog database using following steps. The steps executed in catalog database(appsdb):

SQL> create tablespace rmancatlog_tbs datafile '/u01/app/oracle/oradata/NEW/rman_catalog.dbf' size 500M autoextend off extent management local segment space management auto;

SQL> create user rman identified by oracle
2 default tablespace rmancatlog_tbs
3 quota unlimited on rmancatlog_tbs
4 ;SQL> GRANT connect, resource, recovery_catalog_owner TO rman;

RMAN> create catalog;
recovery catalog created

Added tns entries of catalog database in primary and standby. Then from primary database we tried to register to catalog database. It is showing that it is registering. But every query afterwards in rman is throwing the error. Below are the steps and error:

[oracle@db1 ~]$ rman target sys/oracle catalog rman/oracle@appsdb
Recovery Manager: Release - Production on Mon Aug 13 21:39:32 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: NIOS (DBID=1589015669)
connected to recovery catalog database

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Data Guard :: Changing Password On Primary Database?

Nov 10, 2011

I'm using 2 databases : Primary and Standby DB. It working fine. I've just one question : I want to change SYS password on primary DB. Can I change it without any action on Standby DB?

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Data Guard :: App Archive Logs Which Come From Primary Database?

Feb 16, 2012

If my standby database is read only mode,does it can app the archive logs which come from primary database?

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Data Guard :: Shutdown Down In Primary Database In Environment

Jun 29, 2010

I have configured data Guard on oracle 11gR2. It is working fine. The only issue i am facing is that when i am stopping the database on the primary server, it is taking a long long time to down the database.

Is it normal?

Furthermore, regarding backup i used veritas Netbackup to perform hotbackup. Can i still used the same principle.

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Data Guard :: Changing Redo Log Folder On Primary Database

Mar 3, 2012

I want to replace one redo log on the primary database. actually this redo log is on G:oracleoradata; I want to move it on F:oracleoradata. How to do that cause the same redo log is also on standby database?

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