RAC and standby database

Hi,
We have configured a RAC production system and an standalone standby database.
Last week, we had trouble with our ESS subsystem and we have to failover.
Rigth now we solve the problem with the ESS subsysytem and the RAC enviroment is up and running but the database is no updated because is at the moment that we had the problem.
So, we want to back to the initial configuration (RAC primary database and standalone standby).
I want to know is this can be possible with only a backup/restore? (standby database cold backup and then restore the database over the RAC environment) and then reconfigure our standby database?
Or which steps should we follow to do this?
Thanks in advance,
Gerald

My question is:
Is it possible to setup a standby database on a RAC environment with 2 nodes? I've searched through MOS but didn't find any information about that...Yes, it is possible. Refer this
*Data Guard Physical Standby 11.2 RAC Primary to RAC Standby using a second network [ID 1349977.1]*
MAA / Data Guard 10g Setup Guide – Creating a RAC Physical Standby for a RAC Primary
http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimaryracphysicalsta-131940.pdf
http://wiki.tapriuneclak.com/index.php?title=Oracle_-StepBy_Step_of_Configuring_Oracle_11gR2_(11.2.0.1)_RAC_to_RAC_Dataguard
http://davidalejomarcos.wordpress.com/2010/02/17/creating-a-3-node-rac-database-as-standby/

Similar Messages

Standby database(11g) was still in sync after stopping the primary and standby database listener.

Hello !!!
I have noticed that my standby database(11g) was still in sync after stopping the primary and standby database listener.
If this is the case then how log is transferring from primary to standby ? it is not using listener service ? kindly clarify

Read this Metalink Note:407040.1

Can I have a primary database and standby database with a different windows version?

Hi
I need your help.
We need to increase the memory in the server where is the standby database , but first, we need to upgrade the windows version.
The actual version is windows 2003 standard edition 64 bits
The new version will be windows 2003 enterprise edition 64 bits
This difference in windows version between primary and standby servers can cause a problem in the synchronization between primary and standby databases ??
What do you recommend? Have both servers in the same windows version?
The databases are in SQL SERVER 2005.
Thanks.
Loreinn

This difference in windows version between primary and standby servers can cause a problem in the synchronization between primary
and standby databases ??<o:p></o:p>
There is no issue with database synchronization as long as SQL Server is of same version.<o:p></o:p>
What do you recommend? Have both servers in the same windows version?<o:p></o:p>
OS(Windows version) has no restriction for using SQL server 2005 database mirroring/log shipping. You can go with upgrade without any worries on SQL
database side.<o:p></o:p>

How to sync primary and standby database in 11GR2 on linux

Hi ,
How to sync primary and standby database in 11GR2 on linux . Both my primay and standby are 3 node cluster each.
Can you please suggest a good link and brief steps .
Thanks

Are you trying to setup a new standby or sync an existing standby database?
OK I see it
"standby is behind the primary"
So you have a gap.
I would check both alert logs for a cause. You might find something like this
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor.Look for ORA-00308 and ORA-27037 and ORA-16055.
There's no sense fixing the gap unless the cause is fixed too.
Also check out this post from a few days ago its dealing with similar issues.
How to sync the standby database with the primary?
If you find this helpful please mark it so.
Edited by: mseberg on Jul 20, 2011 4:37 PM

SCN number difference in primary and standby databases

Hi All,
Is it possible that primary database SCN is 20 and standby database SCN is 22 ? If yes , how it works ?
Thankyou !

I agree that it is possible depending on your setup. However, I read your posting and BLOG entry but it does not address out the Standby database has a GREATER SCN than the Primary.
The answer will depend on the type of standby database you have configured (LOGICAL vs PHYSICIAL) and perhaps if it is a SNAPSHOT Standby that has been used and not rolledback.
In what I would consider "Normal" situations the SCN of the standby database would always either be at the same SCN or be lagging.
I have not tested it but I could see where if you had a standby database that you converted to a SNAPSHOT Standby (11g ability), made changes to the standby and had not converted it back to a normal Standby then your SCN can be ahead in the standby because the changes had not been discarded yet.
Regards.
Tim

Goldengate between active and standby database server

Hi:
I want to make goldengate connection between active and standby database servers (bidirectional). is it possible?
if yes what steps is required rather than active-active connection.
PLease help!!!
Regards,
Abhishek

What do you mean by "standby" server? If you are referring to a Data Guard standby, how would bidirectional work? That's why one is primary, the other is standby.
If you are doing A-A, your "standby" is just another master in the N-way master architecture, so you already have a bi-di setup, right? Are you looking to replace Streams with GG?

11gR2 RAC and 2 Databases - how to deploy db console

Hi guys,
we have 11gR2 RAC and 2 Databases -> how to deploy db console?
2 rac nodes, 2 different databases.
in one dbconsole is configured as it was created by installer, at second no as it was created manually.
How should dbconsole configured/installed? as cluster targets, asm are already seen/monitored by previous ones.
will the new dbconsole impact/interfere the current?

Hi,
You can configure OEM manually per instance.
emca -deconfig dbcontrol db -repos drop
emca -config dbcontrol db -repos create

Grid Control and Standby Database

I have a (single node) physical standby server for a two node RAC Primary.
I can view the standby server in OEM ( java tool).
How do I add the standby db in my Grid Control ( 10.2.0.4.0 )
regards,Lily

Thanks for the reply.
Yes I have grid agent running on the standby node. I have also installed 'yast rpms' and the grid control is able to see the host under the 'target' tab of grid control.
While trying to discover the standby database, the automatic target discover fails.
Then I did the 'manually add', and it complains 'failed to connect'.
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Lily

Switchover between primary RAC and standby single instance

Hello All,
I am using Oracle 11gR2.
I am trying to do a switch over between primary database (RAC 2 nodes) and physical standby (single instance)
If my Primary is single instance i was following the below steps:
On the standby
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT;
On the primary database:
alter database commit to switchover to standby with session shutdown;
shutdown immediate;
startup nomount;
alter database mount standby database;
On the standby again:
alter database commit to switchover to primary WITH SESSION SHUTDOWN;
On the new standby:
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;now, and since my primary is RAC when i am trying switch over I am getting the below error:
SQL> alter database commit to switchover to standby with session shutdown;
alter database commit to switchover to standby with session shutdown
ERROR at line 1:
ORA-01105: mount is incompatible with mounts by other instancesPlus that when I want to apply the remaining steps (below step), should I do it on each instance alone? or is there anyway to do it using the srvctl command:
alter database mount standby database;Regards,

Hi,
Since You are using 2 node RAc as primary, so for switchover operation you need to shutdown
one database instance( Suppose instance 2).
Suppose your node1:
hostname is dcpdb1
and node 2:
hostname is dcpdb2
and standby hostname is drpdb1
So follow this steps for switchover .
How to Switchover from Primary to Standby Database?
Process:
On the primary server, check the latest archived redo log and force a log switch.
*########### Login dcpdb1 as Oracle user #########*
SQL> SELECT sequence#, first_time, next_time
FROM v$archived_log
ORDER BY next_time;
SQL> ALTER SYSTEM SWITCH LOGFILE;
Check the new archived redo log has arrived at the standby server and been applied.
*########### Login drpdb1 as Oracle user #########*
SQL> SELECT sequence#, first_time, next_time, applied
FROM v$archived_log
ORDER BY next_time ;
*########### Login dcpdb2 as Oracle user #########*
SQL> SELECT sequence#, first_time, next_time
FROM v$archived_log
ORDER BY next_time ;
SQL> ALTER SYSTEM SWITCH LOGFILE;
Check the new archived redo log has arrived at the standby server and been applied.
*########### Login drpdb1 as Oracle user #########*
SQL> SELECT sequence#, first_time, next_time, applied
FROM v$archived_log
ORDER BY next_time ;
*########### Login dcpdb1 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
TO STANDBY
*########### Login dcpdb2 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
TO STANDBY
*########### Login drpdb1 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
NOT ALLOWED
*########### Login dcpdb2 as Oracle user #########*
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL>
*########### Login dcpdb1 as Oracle user #########*
SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;
Database altered.
SQL>
SQL> shutdown immediate
ORA-01507: database not mounted
ORACLE instance shut down.
SQL>
SQL> startup mount
ORACLE instance started.
Total System Global Area 1.5400E+10 bytes
Fixed Size 2184872 bytes
Variable Size 7751076184 bytes
Database Buffers 7616856064 bytes
Redo Buffers 29409280 bytes
Database mounted.
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
TO PRIMARY
SQL>
*########### Login drpdb1 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
SESSIONS ACTIVE
SQL> alter database commit to switchover to primary with session shutdown;
Database altered.
SQL> shutdown immediate
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL>
SQL> startup
ORACLE instance started.
Total System Global Area 1.5400E+10 bytes
Fixed Size 2184872 bytes
Variable Size 7717521752 bytes
Database Buffers 7650410496 bytes
Redo Buffers 29409280 bytes
Database mounted.
Database opened.
*########### Login dcpdb1 as Oracle user #########*
SQL> alter database open read only;
Database altered.
SQL> alter database recover managed standby database using current logfile disconnect;
Database altered.
*########### Login dcpdb2 as Oracle user #########*
SQL> startup mount
ORACLE instance started.
Total System Global Area 1.5400E+10 bytes
Fixed Size 2184872 bytes
Variable Size 7751076184 bytes
Database Buffers 7616856064 bytes
Redo Buffers 29409280 bytes
Database mounted.
SQL> alter database open read only;
Database altered.
SQL> alter database recover managed standby database using current logfile disconnect;
Database altered.
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
NOT ALLOWED
SQL>
*########### Login drpdb1 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
TO STANDBY
*########### Login dcpdb1 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
NOT ALLOWED
SQL>
*########### Login dcpdb2 as Oracle user #########*
SQL> SELECT SWITCHOVER_STATUS FROM V$DATABASE;
SWITCHOVER_STATUS
NOT ALLOWED
SQL>
*####################### Finish SwitchOver ########################*
Check
*########### Login drpdb1 as Oracle user #########*
SQL> alter system switch logfile;
SQL>
SELECT sequence#, first_time, next_time
FROM v$archived_log
ORDER BY sequence#;
SQL> archive log list
*########### Login dcpdb1 as Oracle user #########*
SQL>
SELECT sequence#, first_time, next_time, applied
FROM v$archived_log
ORDER BY sequence#;
SQL> archive log list
*########### Login dcpdb2 as Oracle user #########*
SQL>
SELECT sequence#, first_time, next_time, applied
FROM v$archived_log
ORDER BY sequence#;
SQL> archive log list
Thanks
Solaiman
Edited by: 876149 on Apr 12, 2013 11:51 AM

Taking RMAN backup of primary and standby databases.

Hi,
I am going to setup a Standby for Primary two node RAC to single node standby.
My doubt is, in standby both primary and standby will have the same db_name. So how can i take the RMAN backup of both primary and standby by using a single catalog.
That is, we can register the primary DB with catalog using it's db_name. But how can we register the standby with catalog using same db_name as it is already registered.
Thanks,
Mahi

Are you using a physical or logical standby?
If its a physical standby why do you need to back up both databases? backup the standby and you are done, the backup from the standby can be recovered to either the live serever or the standby if needed, andt hen the archivelogs used to bring it up to date.
If its a logical standby then change the database name for the standby and you can back both up to the same catalog, or alternativly cretae a new catalog for the standby, either as a new database or a new schema in your existing catalog.

How to delete archivelog with RMAN in the Primary and Standby database?

Hello,
I am working on Oracle 10gR2.
My question is :
How could I implement a automatized and secure way of:
1) Delete archivelogs on my PRIMARY server only when these logs are successfully TRANSFERED to all my standby databases?
2) Delete archivelogs on my STANDBY server only when these logs are sucessfully APPLIED to the database?
Thanks a lot for your help!

on 10G
CONFIGURE ARCHIVELOG DELETION POLICY TO [CLEAR | NONE | APPLIED ON STANDBY];
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/rman.htm#CHDBEICE
Coskan Gundogar
http://coskan.wordpress.com

Switching between Primary and Standby database

Hi,
I managed to setup a standby database that is updated by the primary db either when doing a log file switch or when changing the role of the primary db to standby.
Now I want to put the standby database (that was in primary role for a short period) back into its standby role. I entered
"Alter database commit to switchover to physical standby with session shutdown;"
The archived redo logs as well as the control file are updated on the primary database (which was in standby role for the same short period). When I enter
"Alter database commit to switchover to primary" I am receiving the following error message:
SQL> alter database commit to switchover to primary;
alter database commit to switchover to primary
ERROR at line 1:
ORA-16139: media recovery required
After issuing the recovery statement I get this message:
SQL> recover database
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
At the same time this log entry is written into the alert log:
Database not available for switchover
End-Of-REDO archived log file has been received
Archived log files detected beyond End-Of-REDO
Incomplete recovery SCN:0:962365 archive SCN:0:977340
Switchover: Media recovery required - standby not in limbo
ORA-16139 signalled during: alter database commit to switchover to primary...
But when I try to use the BACKUP CONTROLFILE statement during recovery I get this error message:
SQL> recover database using backup controlfile;
ORA-00283: recovery session canceled due to errors
ORA-01666: control file is for a standby database
Although being quite a newbie it's obvious that the primary database (which was standby for a short period) is worried that there are older archived redo logs than online logs. I guess this happens because of the log_archive_dest definition on the standby database :
*.LOG_ARCHIVE_DEST_3='SERVICE=ORAMPPRD REOPEN=60 MAX_FAILURE=3 LGWR SYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=ORAMPPRD'
Changes are applied immediately and only written to the archive.
But how can it be managed that the online redo logs on the primary system are also updated when switching back from standby ???
Thanks,
Philipp.

Thanks, it's working now.
I think it's important to explizitely follow the steps to switchover standby and primary for it to work. I maybe shutdown the standby to early.
Cheers,
Philipp.

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.

How to re-synch primary and standby database?

Hello everyone,
Working on 10g R2/windows server 2003, I have configured a physical standby database but, I have an issue, and don't know how to resolve it.
We were making an update that made some DDL and DML on our application, and for security reason we
1. we ensure that primary and standby are in sync
2. We made a cold backup of the primary database
3. We Deferred the redo shipping between primary and standby
4. We applied changes on primary database
But the big issue is that, for any reason my colleague did the following.
a) made above steps 1,2,3,4
b) after the update he kept the resulted archived log files generated during to another location
c) He restore the cold backup before the update(step 2 above)
c) he applied again the update.
Now the issue is
At the first update step(2), the sequence# 553 was applied to the stand by before the update
At the second update step(c) above another sequence# 553 was created but stored localy in the primary database, because the both servers were deverged (step 3 above).
Technically both servers cannot be in sync again,because sequence# 553 at the first update has next_change# 80307804 and sequenc# 553 at the second update has next_change# 80461356.
Question:
How Can I do to rollback the the first sequence# 553 ( before the first update) on the standby database? in order to apply the sequence#553 generated at the second update and then re-sync both servers to roll forward subsequent sequence#? 554,etc...
Thank you for your help

Hello,
I have just tried the FLASHBACK DATABASE TO SCN XXXXXXXX;
but it doesn't work.
Here are steps used from my local dev envirronnment
From the stand by I retrieved the following information.
SEQUENCE# FIRST_CHANGE# NEXT_CHANGE# FIRST_TIM NEXT_TIME
95 707168 707906 15-AUG-08 15-AUG-08
96 707906 708653 15-AUG-08 15-AUG-08
97 708653 709359 15-AUG-08 15-AUG-08
100 710951 711794 15-AUG-08 15-AUG-08
98 709359 710179 15-AUG-08 15-AUG-08
99 710179 710951 15-AUG-08 15-AUG-08
101 711794 712762 15-AUG-08 15-AUG-08
102 712762 713720 15-AUG-08 15-AUG-08
103 713720 714748 15-AUG-08 15-AUG-08
104 714748 715920 15-AUG-08 15-AUG-08
105 715920 739430 15-AUG-08 15-AUG-08
106 739430 800525 15-AUG-08 16-AUG-08
107 800525 875810 16-AUG-08 17-AUG-08
108 875810 916527 17-AUG-08 18-AUG-08
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> alter database activate standby database; --> prepare to open stby in R/W mode
Database altered.
SQL> startup mount force;
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 1250428 bytes
Variable Size 180358020 bytes
Database Buffers 423624704 bytes
Redo Buffers 7135232 bytes
Database mounted.
SQL> alter database set standby database to maximize performance;
Database altered.
SQL> alter database open;
Database altered.
SQL> startup mount force;
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 1250428 bytes
Variable Size 180358020 bytes
Database Buffers 423624704 bytes
Redo Buffers 7135232 bytes
Database mounted.
Now I tried to mimic the flashback database as in the production, to bring it back to sequence# 105 above
SQL> flashback database to scn 739430;
flashback database to scn 739430
ERROR at line 1:
ORA-38754: FLASHBACK DATABASE not started; required redo log is not available
ORA-38761: redo log sequence 75 in thread 1, incarnation 2 could not be
accessed
I'm reverted back the physical standby to its function
SQL> alter database convert to physical standby;
Database altered.
SQL> startup mount force;
ORACLE instance started.
Total System Global Area 612368384 bytes
Fixed Size 1250428 bytes
Variable Size 180358020 bytes
Database Buffers 423624704 bytes
Redo Buffers 7135232 bytes
Database mounted.
SQL> alter database recover managed standby database using current logfile disconne
Database altered.
Verifying if the MRP is up and running: YES see below
SQL> select message from v$dataguard_status;
MESSAGE
ARC0: Archival started
ARC1: Archival started
ARC2: Archival started
ARC3: Archival started
ARC3: Becoming the 'no FAL' ARCH
ARC3: Becoming the 'no SRL' ARCH
ARC1: Becoming the heartbeat ARCH
Attempt to start background Managed Standby Recovery process
MRP0: Background Managed Standby Recovery process started
Managed Standby Recovery starting Real Time Apply
Clearing online redo logfile 1 C:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\REDO11.LOG
11 rows selected.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination C:\local_destination1_orcl
Oldest online log sequence 110
Next log sequence to archive 0
Current log sequence 110
So, how can I reslove this issue? without creating the standby from scratch?
Thanks Again for your help

Primary and Standby database: same Oracle release?

Hi ,
we have to create a standby database in our new datacenter. The primary database is of Oracle release 9.2.0.8 - but on the server for the standby site only Oracle release 9.2.0.5.0 is installed.
Is that supported by Oracle anyway? No need to tell that in release 9.2.0.5.0 could be some bugs and other problems which are already fixed in 9.2.0.8.
Would be great if somebody could provide use with an answer and a link to a Oracle documentation which states: must be of same release or not.
Any help will be appriciated!
Rgds
Jan

Hello again;
I'm pretty sure this note covers it:
9i Data Guard FAQ [ID 233509.1]
I cannot post any of the note because of my support agreement.
Best Regards
mseberg

RAC and standby database

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