Data Guard :: Unable To Perform A Switchover
Nov 2, 2013
I have a dataguard configuration (physical standby).Database A is the primary database and database B is the standby database (I do not use the broker).Both are Oracle RDBMS 12cR1 EE. The Apply process uses the current log (standby redo logs).On database B, when querying v$managed_ standby;, I get:
ClientProcess process Status ---------- ARCH ARCH CONNECTED ARCH ARCH CONNECTED ARCH ARCH CONNECTED ARCH ARCH CONNECTED RFS ARCH IDLE MRP0 N/A APPLYING_LOG RFS LGWR IDLE
It works fine. Before to perform a switchover,- from database A (current physical database), I get switchover_status = 'TO STANDBY'- from database B (current standby database). I get switchover_status = 'NOT ALLOWED'. What switchover_status = 'NOT ALLOWED' means exactly and how to get further with the switchover?
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Dec 20, 2012
I have this scenario:
- Oracle 11.2.0.3
- RHEL 4.6 64 bits
- Active Data Guard
- Broker configured
- DBconsole configured on primary server
Now, I have server PRIM with the primary database, and server STB with the standby server. For now, the dbconsole is configured in the PRIM server.When I do a switchover (to the standby on STB), EM is not configured, so I use RepManager.sh to clean the sysman user, and I use emca to recreate the dbconsole. After this, everything works.
Once I switch back, the EM is no longer configured on PRIM, so I repeat the previous steps (repManager and emca). Everything is ok after this. I can access the EM on the primary normaly, and this gets information from the broker to provide basic information on the STB (like db status, apply, and so forth).
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Oct 1, 2012
we have a created primary and physical standby databases. Before the switchover the application connected to dataguard allows updates on the database. However after the switchover, it allows read-only access and we are unable to update. Any comments prima-facie ?
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Nov 22, 2011
I am fairly new to Oracle and have recently started learning the basics of Data Guard. I have set-up a Primary 11g database which successfully ships and applies logs to a Single Standby (on the same server) as expected. Manual switchovers work fine; however, I have found a slight problem when performing switchovers using the Data Guard Broker utility.
The switchover is successful- but the broker cannot restart the Primary instance. The strange thing is that when I perform a switchover in the opposite direction (i.e. the new Primary goes back to standby again) it works fine. The error is receive is: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor.
The majority of posts I have seen on this topic seem to point to incorrect listener / tnsnames set up but they have exactly the same values. If both databases are identical, why does it work one way but not the other? I will provide any necessary files to pinpoint where the issue could be.
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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;
AUTO
SQL> exit
[code]....
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Dec 8, 2010
I am having setup of 2 node 10.2.0.4.0 RAC setup on ASM with Single Instance Physical standby on File System (OS: RHEL 5.4). I configured DG Broker without any major issues. Getting all output of 'show configuration' and all DG related logs are clear. Archives are getting transferred from both Primary nodes.
DGMGRL> show configuration
Configuration
Name: dg_rac
Enabled: YES
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
livestdby - Primary database
livedg - Physical standby database
Current status for "dg_rac":
SUCCESS
Now I am getting error Error: ORA-16535: CRS is preventing execution of a broker operation.
DGMGRL> switchover to livedg;
Performing switchover NOW, please wait...
Error: ORA-16535: CRS is preventing execution of a broker operation
Oracle Says
Quote:Cause
A broker operation was underway that required CRS to stop managing the instances of this database, but CRS management could not be stopped on behalf of the broker"s request on at least some of the instances, so the broker operation was canceled.Suspend CRS management of this database using SRVCTL STOP DATABASE -D <name> -O NONE. Then reissue the broker request.But this command is not working as it's given to stop the database.
One more thing, it's nowhere said to stop CRS while performing Switchover / Switchback using DG Broker. When we do Switchover / Switchback we keep open only one of the Primary instance.
is there any documentation / link available to switchover of RAC database using dgmgrl (DG Broker)
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May 10, 2011
After switchover the primary is now standby and standby is now primary, the clients are unable to connect to new primary database.
TNSNAMES.ora file at client side...
prim.world=
(DESCRIPTION_LIST=
(FAILOVER=true)
[Code].....
SQL> conn iq/iq@prim.world
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
SQL> conn sys/ora123@prim.world as sysdba
Connected.
SQL> select open_mode from v$database;
OPEN_MODE
--------------------------------------------------------------------------------
MOUNTED
SQL> select database_role from v$database;
DATABASE_ROLE
--------------------------------------------------------------------------------
PHYSICAL STANDBY
SQL>
--------------------------------------------------------------------------------
It's Oracle 10.2.0.1.0 version....
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Apr 5, 2013
Dataguard and RMAN.
Got Active DataGuard on a primary database, quite nicely sending its archive logs to its secondary. I can quite happily use the Broker and switchover between them.
Now if I take RMAN backups of the primary database, if I have to failover to the secondary, I'm gonna loose all those backups.
Well, I can restore the whole database to the backup, cos I can restore the control file, from the backuip and therefore I can restore the whole db.
But if I want to restore to a tablespace, I wont be able to , cos the db_unique_names names are different, and the DB ID's will be different.
Same goes if I use a recovery catalog....
so how do I failover/switchover without loosing my previous rman backups ??
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Apr 21, 2011
alter database commit to switchover to physical standby; i am getting ora-16416 switchover target is not synchronized with the primary what to do
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Jan 10, 2011
i have Oracle 10g data guard set up on windows environment.....i need to know the what are the right steps to perform failover in case the primary database gets fail.
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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=172.16.0.98)(PORT=1522))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=STAND)(SERVER=dedicat ed)(CID=(PROGRAM=d:oracle11gappadministratorproduct11.1.0db_1inORACLE.EXE)(HOST=A960M)(USER=SYSTEM))(SERVER=dedicated)))
VERSION INFORMATION:
TNS for 64-bit Windows: Version 11.1.0.6.0 - Production
[code]....
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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
ORA-01110: data file 2: 'D:ORACLE11GAPPADMINISTRATORORADATASTANDSYSAUX01.DBF'
[code]....
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:
'D:ORACLE11GAPPADMINISTRATORORADATASTANDSYSTEM01.DBF'
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Mar 22, 2010
I am unable to start ACTIVE DATAGUARD in 11g.
SQL> startup
ORACLE instance started.
Total System Global Area 522092544 bytes
Fixed Size 2090224 bytes
[code]...
Database altered.
SQL> select count(*) from scott.test;
select count(*) from scott.test
*
ERROR at line 1:
ORA-01219: database not open: queries allowed on fixed tables/views only
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Mar 21, 2013
standby db /primary db in sync managed recovery working but
broker
show configuration
Connected.
DGMGRL> show configuration
Configuration - GenesisDR
Protection Mode: MaxAvailability
Databases:
orcl - Primary database
Warning: ORA-16629: database reports a different protection level from the protection mode
standby - Physical standby database
Error: ORA-16664: unable to receive the result from a database
Fast-Start Failover: DISABLED
Configuration Status:
ERROR
DGMGRL>
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Oct 17, 2013
I decided to configure our current standby databases for administration in EM 12c via the "Manage an existing standby database with Data Guard broker". The first one went off without issue but on the second I got "ORA-16664: unable to receive the result from a database". I've scoured through everything and confirmed, more than once, that the tnsnames, listener and pwfile are all good to go. I can tnsping everything from both servers. The sby1 database is functioning fine and all log files are being transported and applied without issue from primary to standby, on different servers. I can connect via sqlplus to each database from opposite servers. I don't understand how I can do the below in DGMGRL:The listener doesn't not know of service requested (PRI1) and is unreachable in the first connect, but then I can turn around and successfully connect to PRI1 without issue?
DGMGRL> connect sys@sby1Password:Connected.DGMGRL> show configuration; Configuration - PRI1_ora-9002.xxxx Protection Mode: MaxPerformance Databases: PRI1 - Primary database sby1 - Physical standby database Fast-Start Failover: DISABLED Configuration Status:ORA-12514: TNS:listener does not currently know of service requested in connect descriptorORA-16625: cannot reach database "PRI1"DGM-17017: unable to determine configuration status DGMGRL> connect sys@pri1Password:Connected.DGMGRL> show configuration Configuration - PRI1_ora-9002.xxxx Protection Mode: MaxPerformance Databases: PRI1 - Primary database sby1 - Physical standby database Error: ORA-16664: unable to receive the result from a database Fast-Start Failover: DISABLED Configuration Status:ERROR DGMGRL> ;
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Nov 4, 2010
why RMAN is unable to create physical standby database ?
RMAN> connect auxiliary sys/system@DGREPL
connected to auxiliary database: DGREPL (not mounted)
RMAN> connect target sys/system@REPL
connected to target database: REPL (DBID=2730563515)
RMAN> run{
allocate channel prmy1 type disk;
allocate channel prmy2 type disk;
allocate channel prmy3 type disk;
allocate channel prmy4 type disk;
[code]....
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Aug 19, 2012
[oracle@RSASPGERP02 ~]$ cd /
[oracle@RSASPGERP02 ~]$ . .bash_profile
[oracle@RSASPGERP02 ~]$ sqlplus / as sysdba
sql*plus:Release 10.2.0.4.0 - production
Error:
ORA-09925:Unable to create audit trail file
[code]....
its standby archieving problem ,the problem appears when try to connect directly or through telenet and we try to login directly using oracle user we receving following message and login fail, "GDM could not write to your authorization file,this could mean that you are out of disk space or that your home directory could not be opened for writting"
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Aug 2, 2010
I am creating physical standby database through Rman duplicate command from 2 node rac cluster. rman do all its work. now am try to start the mrp process on physical standby database. I am getting following errors
------------------------------------------------------------
Check that the primary and standby are using a password file
and remote_login_passwordfile is set to SHARED or EXCLUSIVE,
and that the SYS password is same in the password files.
returning error ORA-16191
------------------------------------------------------------
ORA-16191: Primary log shipping client not logged on standby
------------------------------------------------------------
I copied the same pass file from primary to standby and many times verify the same but i got the same error.
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May 13, 2010
I am getting the same error on a form I am setting up under version 10.1.2 Form Builder. But when I press Shift-F1 I get a Getting Started with Internet Explorer popup. I am running the form under OAS. I have a parent/child relationship between 2 tables that I query on the form.
A copy of the fmb file is attached to access it.
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Jul 5, 2011
We have physical data guard configured version (10.2.0.4). We are in need to upgrade primary & standby database to 11G R2. Can we perform rolling upgrade.
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Oct 11, 2010
I have a staging table with 70 million rows and nearly 90 columns. We just want to verify and perform some validations on the data and then move this data to final tables. There staging table has a primary key in it.
We are planning to create the final table in following ways.
1. Create n number of final tables.
2. Create n number of final tables with partitions based on the primary key value in staging table.
3. Create single final table with partition based on the primary key value staging table.
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Oct 17, 2012
Controlling User Access to Tables in a Logical Standby Database can be controlled using the following command:
ALTER DATABASE GUARD STANDBY;
My simple question is: how can I know the current active Guard setting in the standby database?
Oracle 11g R2.
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Nov 5, 2010
I want to change dbname,sid,data/control file locations in operational dataguard setup i plan to follow as below
1)shutdown primary and standby (stop managed recovery)
2)change db name in init.ora of primary and standby change database name control file location
3)create control file for primary from trace(script) make changes for db name and file locations
4)mount and open primary database
5)create standby control file
6) transfer standby control file to standby
7) mount stand by database and start manage recovery
If this steps will error free do i need to follow any thing additional to this or what is other best way for this or its not possible at all
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Feb 24, 2013
Oracle Version: 11.1.0.7.0
Active Dataguard
Statspack has been configured for Active Dataguard on Primary database.We got an spike of Buffer busy waits for about 5 min in Active Dataguard, this was causing worse Application SQL's response time during this 5 min window.Below is what i got from statspack report for one hour
Snapshot Snap Id Snap Time Sessions Curs/Sess Comment
~~~~~~~~ ---------- ------------------ -------- --------- -------------------
Begin Snap: 18611 21-Feb-13 22:00:02 236 2.2
End Snap: 18613 21-Feb-13 23:00:02 237 2.1
Elapsed: 60.00 (mins)
[code]...
Why there could sudden spike of demand on UNDO data in Active Data Guard ?
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Nov 19, 2011
I have an issue of not able to connect to the database after switchover without making changes in TNS entry after the switchover when I try to connect to then the primary database (which is standby before ) , the tns entry has entries for both the primary and secondary but the order of the primay and seconday database is to be changed manually till then it keep showing ERROR: ORA-01033: ORACLE initialization or shutdown in progress.
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Mar 29, 2011
I am working in a bank as an system consultant, i have a SAN Storage Area and oracle as below.
SAN 1
This interface includes the DATA FILES of the oracle tablespace
SAN 2
SAN1 Mirrors the DATA FILES of the oracle tablespace to SAN 2
1. Can i rely on real time data recovery from SAN2 ?
2. if SAN1 (Data Files are currupted) will the SAN2 Data Files will be currupted as well.
3. If the SAN2 is currupted then what Oracle Features can be used to have uncurrupted data.
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Jul 23, 2010
i did everything writen but when i do *SQL>alter database recover managed standby database disconnect from session;*
i go and look in the standby database AlertLog file ,and thats whats writen
*ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: 'F:ORACLEPRODUCT10.2.0ORADATADBSYSTEM01.DBF'
ORA-27041: unable to open file
OSD-04002: غير قادر على فتح الملف
O/S-Error: (OS 3) The system cannot find the path specified.
[code]....
strange thing that it realises the primary database in drive F and it goes to it but i dont understand what could be the reason of this ,although im doing this command while primary database is shutdown!
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May 2, 2012
I configure logical standby online .when I execute dbms_logstdby.buid,first
SQL> EXECUTE DBMS_LOGSTDBY.BUILD;
it was blcoked by other sesson,then i kill the holding session,but no work.then i cancel this step and execute it again . the error is
SQL> EXECUTE DBMS_LOGSTDBY.BUILD;
BEGIN DBMS_LOGSTDBY.BUILD; END;
*
ERROR at line 1:
ORA-01354: Supplemental log data must be added to run this command
ORA-06512: at "SYS.DBMS_LOGMNR_INTERNAL", line 3669
ORA-06512: at "SYS.DBMS_LOGMNR_INTERNAL", line 3755
ORA-06512: at "SYS.DBMS_LOGMNR_D", line 12
ORA-06512: at line 1
ORA-06512: at "SYS.DBMS_INTERNAL_LOGSTDBY", line 370
ORA-06512: at "SYS.DBMS_LOGSTDBY", line 157
[code]....
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Jun 15, 2012
I have set up a cross platform (Microsoft Windows IA (32-bit) -> Linux x86 64-bit) data guard and it worked fine.Then I did a switch over (which again worked) and found out the data is not getting replicated at all.. checked the data files available from the new primary database and found out they are in the windows format as below..
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
D:ORACLEAPPADMINISTRATORORADATAMFSSYSTEM01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSSYSAUX01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSUNDOTBS01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSUSERS01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSRMANRMAN_TS01.DBF
and physically they were created at '/home/app/oracle/product/11.2.0/db_1/dbs/' and as
D:ORACLEAPPADMINISTRATORORADATAMFSREDO02.LOG
D:ORACLEAPPADMINISTRATORORADATAMFSREDO03.LOG
D:ORACLEAPPADMINISTRATORORADATAMFSRMANRMAN_TS01.DBF
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Oct 21, 2012
Our organization has recently decided to go for storage metro cluster solution for disaster recovery. In a Data guard environment, we normally calculate how much archive log is generating and based on that value we calculate the required bandwidth.
For storage metro cluster, we need to find how much block is changing in our primary database, and the same rate of change would apply on DR cluster. Now, i need to give the assumption how much changing is happening in my system. How to calculate the change.
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