How to setup a Multi-instance standby database?

I was asked to setup a multi-instance standby database for a multi-instance primary database. I understand that only one of the instance will apply redo logs from the primary database, but how about the other instance? Should I mount that instance just to update the standby control file(the control file is not located in shared file system with the cluster server) even if it isn't going to apply any redo logs?
I am so confused now. Hope somebody will help me on that. Any document or tutorial will be helpful too.
Note that I am not using dataguard.
Thanks in advance

Hi,
You can set up multiple instance standby..where in each instance will receive the archive logs from correpsonding primary instance. Keep them on shared location (say ASM) so that one of the instances from where recovery is started can access the archive logs and apply it.
So basically
Primary instance A <----- send archive to ---> Standby A
Primary instance B <----- send archive to ---> Standby B
Start managed recovery on A
Standby A --- > Apply archives for instance A and B
-Amit
http://askdba.org/weblog/
Edited by: Amit_DBA on Aug 12, 2009 5:16 PM

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Multi-Instance Standby Database

Hi,
Please let me know how to setup multiple-instance dataguard for 2 node RAC.
I want to setup 2 Instance Standby (dataguard) Database for 2 node RAC.
Thanks,

930109 wrote:
Hi,
Please let me know how to setup multiple-instance dataguard for 2 node RAC.
I want to setup 2 Instance Standby (dataguard) Database for 2 node RAC.
Thanks,What is the version?
Yes, you can configure RAC to RAC primary and standby, Please refer MAA document http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimaryracphysicalsta-131940.pdf
Above 10g versions this document is applicable.

10.2.0.4 patch on single instance standby database

Hi All,
We have production database 10.2.0.3 running with RAC having 2 nodes on Solaris 10. We have patched this
databases to 10.2.0.4 (both nodes) on production without any issue.
We have a physical standby database (10.2.0.3) with 2 nodes on solaris 10. But we have stopped node2 sometime
back and currently it's a single instance standby database. Whe nwe are trying to apply patch to standby dataabse
it's showing both node during installation and installation fails when it tries to search for node2.
What's the solution for this problem? Any document on how to patch the single instance standby database when
production is running in RAC.

I think you are basically saying that you have a 2 node RAC cluster with 1 node down (possibly permanently) and you want to just patch 1 of the nodes?
It's not overly a surprise the installer is trying to patch the other node, when as far as your inventory is concerned you have a 2 node cluster.
Have you tried running the installer with the -local option?
This should just patch your local node. Obviously the dictionary changes will get applied via MRP from the primary db.
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http://jarneil.wordpress.com

How to setup Data guard for SAP database?

Can someone please tell me how to setup data guard for SAP databases?
Thanks,
Abhi

Hi Abhi,
have a look at OSS 105047 - Support for Oracle functions in the SAP environment you find this under
14
Oracle Data Guard
You can use "Physical Standby".
You cannot use "Logical Standby".
You are allowed to use Fast Start Failover (FSFO) but SAP Support is not provided.
You can use Data Guard Broker.
You can use Maximum Performance Mode, Maximum Availability Mode and Maximum Protection Mode.
In the case of Maximum Availability and Maximum Protection, you must pay particular attention to a fast network connection in order to avoid performance problems.
Maximum Protection causes the primary database to terminate if problems occur in the standby database.
And here you find on Oracle white paper from 2010 http://www.oracle.com/us/solutions/sap/wp-ora4sap-dataguard11g-303811.pdf
Perhaps some SAP user have answers for you http://scn.sap.com/community/oracle/content?query=guard
regards
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How to delete archivelog file at standby database

Hi All,
I'm running Physical Standby Database on ASM. At standby database, I can see all logs using asmcmd:
ASMCMD> ls
thread_1_seq_14.330.625772527
thread_1_seq_15.346.625772527
thread_1_seq_16.329.625772527
thread_1_seq_17.327.625772559
thread_1_seq_18.324.625772599
thread_1_seq_19.341.625772367
thread_1_seq_2.325.625772329
But when I run RMAN to delete all these archivelogs, its give me error:
oradr:/u01/app/oracle$rman rcvcat rman/rman@rman target /
Recovery Manager: Release 10.2.0.3.0 - Production on Thu Jun 28 13:50:41 2007
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: AIXDB (DBID=2438430915, not open)
connected to recovery catalog database
RMAN> delete archivelog all;
Starting implicit crosscheck backup at 28-JUN-07:01:50:56
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of delete command at 06/28/2007 13:50:56
RMAN-12010: automatic channel allocation initialization failed
RMAN-06004: ORACLE error from recovery catalog database: RMAN-20001: target database not found in recovery catalog
RMAN> register database;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of register command at 06/28/2007 13:51:06
RMAN-08040: full resync skipped, control file is not current or backup
Even it is not registering it. So how to delete archivelog file at standby database.
Thanks in Advance
Rakesh

This appears related to Bug 3298797 that was supposed to be fixed in 10.2.0.1. The workaround is to switch over to the standby, register the standby and then switch back.

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

How to check data in physical standby database?

Hi!
I'm maintaining physical standby database system. everyday, i must check tranfer and apply progress. I known, it operate very good. No archive gap is found.
But i want to check data in physical standby database that there is consistant with primary database, there isn't? What method do I use? How to do?
thankS

I hope the following will help
Verifying the Physical Standby Database
==========================================
Once you create the physical standby database and set up log transport services, you may want verify that database modifications are being successfully shipped from the primary database to the standby database.
To see the new archived redo logs that were received on the standby database, you should first identify the existing archived redo logs on the standby database, archive a few logs on the primary database, and then check the standby database again. The following steps show how to perform these tasks.
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On the standby database, query the V$ARCHIVED_LOG view to identify existing archived redo logs. For example:
SQL> SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME
2 FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;
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8 11-JUL-02 17:50:45 11-JUL-02 17:50:53
9 11-JUL-02 17:50:53 11-JUL-02 17:50:58
10 11-JUL-02 17:50:58 11-JUL-02 17:51:03
3 rows selected.
Step 2 Archiving the current log.
On the primary database, archive the current log using the following SQL statement:
SQL> ALTER SYSTEM ARCHIVE LOG CURRENT;
Step 3 Verify that the new archived redo log was received.
On the standby database, query the V$ARCHIVED_LOG view to verify the redo log was received:
SQL> SELECT SEQUENCE#, FIRST_TIME, NEXT_TIME
2> FROM V$ARCHIVED_LOG ORDER BY SEQUENCE#;
SEQUENCE# FIRST_TIME NEXT_TIME
8 11-JUL-02 17:50:45 11-JUL-02 17:50:53
9 11-JUL-02 17:50:53 11-JUL-02 17:50:58
10 11-JUL-02 17:50:58 11-JUL-02 17:51:03
11 11-JUL-02 17:51:03 11-JUL-02 18:34:11
4 rows selected.
The logs are now available for log apply services to apply redo data to the standby database.
Step 4 Verify that the new archived redo log was applied.
On the standby database, query the V$ARCHIVED_LOG view to verify the archived redo log was applied.
SQL> SELECT SEQUENCE#,APPLIED FROM V$ARCHIVED_LOG
2 ORDER BY SEQUENCE#;
SEQUENCE# APP
8 YES
9 YES
10 YES
11 YES
4 rows selected.

How to exclude tablespace in logical standby database

Dear all,
In which way does the creation procedure of a logical standby database differ than the standard ORA9.2 procedure (http://www.oracle.com/pls/db92/db92.to_pdf?pathname=server.920%2Fa96653.pdf&remark=docindex) if I want to exclude a tablespace in my standby database?
Excluding tablespace in physical standby database is impossible.
Thanks in advance.

The goal of a stand by database is to become a clone fed online with transactions coming from the active database. If the cloned database in a physical dataguard configuration diverges from the active database it is useless, as transaction control takes place at a lower level (physical addresses are involved).
~ Madrid

How to open a "manual" Physical standby database in read/write mode

Hi,
I am running Oracle Database 10g Release 10.2.0.3.0 - 64bit Production Standard Edition on Linux version 2.6.9-42.0.8.ELsmp ([email protected]) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3))
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startup nomount pfile='/u01/oradata/orcl/initorcl.stdby';
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shutdown immediate;
startup;
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Thanks,
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Hello,
There're features which allows you to open a Standby database in Read/Write mode but for all I know
it needs Entreprise Edition.
In Enterprise Edition you can use Logical Standby database. More over, for Physical standby there's
a way by using flashback database so as to rolling backward the database and avoiding to recreate
the Standby.
In Standard Edition I'm afraid that you'll have to recreate your Standby database.
Best regards,
Jean-Valentin

How to identify that my physical standby database in use real time apply?

Hi,
Can any one give me the SQL to identifiy that my physical standby database is in real time applying redo logs?
Its urgen please....
Thanks.

You could just look at the alert log. Look for "Recovery of Online Redo Log"
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to_char(applied_time,'dd-mon-yyyy:hh24:mi'),
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How to import schema into logical standby database

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iam importing as system user .
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can some one help what was going wrong.
thank you in advance.
kalyan

Hi kalyan,
May u plz let us know which import command you are using? kinldy check that your system user has import/export privileges?
Thanks
Hassan Khan

How to stop and cancel physical standby database (ORACLE 10g)

Dear All,
I have physical standby setup and I want stopped for the time being that to use the database as an normal DB (standalone inestance).
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Regards,

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Edited by: Veeresh.S on Nov 14, 2012 5:45 PM

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How to setup a Multi-instance standby database?

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