Rebuild RAC standby

Hi all,
Can anyone give any insight into the steps to rebuild a RAC standby?
My guess is as follows:
The following is all on standby side
1. activate standby r/w
2. Test failover
3. use dbca to delete the database (dbca unregisters instances and services from OCR)
4. use RMAN to recreate the duplicate standby
--creation of logs needs to be done..
5. re-register the instances and services with the OCR
Does seem about right?
Can anyone recommend a document detailing the instructions for re-building a RAC standby after activation?
Thanks in advance.
john

I need a high level view... like task list..
Its a rebuild of an 11gR2 physical RAC standby on Linux RH4.
My guess is I can use dbca to delete the activated standby and then use RMAN to recreate the standby and then manually register the instances and services to the OCR.
My query is the steps with the RMAN creation of the new standby, do I do it in single instance mode and then add standby logs then modify the spfile to reflect cluster_database = true and then register the services and instances and put it in managed standby mode etc..
The bottom line is I need to some offical documentation for the steps involved in recreating an activated RAC standby.
I will contact oracle support.
Edited by: user9179270 on 25-May-2010 04:33
Edited by: user9179270 on 25-May-2010 04:36

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RAC Standby Database rebuild

Hi
Current 10.2.0.4 Setup is with Dataguard Broker (Unix/No OEM Setup):
Rac Primary 2node cluster
Rac Standby 2node cluster
The rac Standby Database are going to be opened read/write.
Then will require a rebuild of standby ie delete db files and duplicate db using rman
1) My questions is how do I rebuild of a rac standby database with an existing enabled dg broker?
2) Are there any documentation on the steps to follow.
3) Should the dg broker config be dropped or just disabled and if so at which stage?
Config on Rac primary should be kept to a minimum as its being used so no outage expected here.
Regards
Me

Have you given any thought to using flashback (depending on how long your standby will be open for read/write)? You could (before you open read/write) copy your dr*.dat files (broker config files), stop the broker and create a guarenteed restore point. After you have finished and ready to convert back to standby you would flashback your database to the restore point, convert back to a physical standby, restart the broker and shutdown. Restore the dr*.dat files to their location and then startup the standby. From there it should fetch the logs from the time the broker was down and catch back up.
If you would rather rebuild, again you would need to take the broker out of the equation and use RMAN to create a clone for standby and then once in place you would reconfigure the broker (may be able to just restore the dr*.dat files from before the open operation but unsure.

Is the only way to import large amount of data and database objects into a primary database is to shutdown the standby, turn off archive log mode, do the import, then rebuild the standby?

I have a primary database that need to import large amount of data and database objects. 1.) Do I shutdown the standby? 2.) Turn off archive log mode? 3.) Perform the import? 4.) Rebuild the standby? or is there a better way or best practice?

Instead of rebuilding the (whole) standby, you take an incremental (from SCN) backup from the Primary and restore it on the Standby. That way, if, for example
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Source:
OS: Linux 64 bit
Oracle: 11.2.0.1
RAC/ASM: yes/yes
Target:
OS: Linux 64 bit
Oracle: 11.2.0.1
RAC/ASM: yes/yes
Thanks in advance!!
Regards,

Hi
You can follow following...
1.Install crs.
2.Create ASM instance at standby site...
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4.start database instance in one node at nomount state..
5.create standby control file at primary database...
6.Copy and paste created control file at primary to standby site..
7.Copy control file at file system and modify location of control file at init<SID>.ora.
8.start standby database mount state..
9.create backup text backup controlfile at primary site...
10.shutdown standby database,change location of controfile inside ASM.. and place nomount state...
11.Create controfile through text backup controfile...
12.backup primary db and paste it in standby site..
13.Use RMAN to place datafile inside ASM..if you not using RMAN for backup and restoration purpose..
14.start standby database in mount state and recover through MRP or foreground process..
15.use SRVCTL to register ASM instances..database and database instances.
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Tinku

Creating a RAC standby database for a single instance database

Dear All,
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OS: Windows Server EE 2003 (64-bit)
DB: Oracle 10g Database Release 2 (10.2.0.4)
Oracle 10g Clusterware Release 2 (10.2.0.4)
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b) Install Database (10.2.0.1)
c) Patch both Clusterware and Database (10.2.0.4)
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Regards

Please refer to MAA whitet paper :
[http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10g_RACPrimaryRACPhysicalStandby.pdf]
[MAA website|http://www.oracle.com/technology/deploy/availability/htdocs/maa.htm]

RAC/Standby enviornment configuration---database wise

Hi, Our final migration is getting very close. I have implemented/configured everything according to oracle MAA, and hopefully after migration, the system will be more stable than previous enviornment.
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nfo
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MemFree: 369244 kB
Buffers: 881572 kB
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VmallocUsed: 476800 kB
VmallocChunk: 34359261519 kB
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HugePages_Free: 0
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Here are some of my parameters:
lock_sga boolean FALSEbuffer_pool_keep string
buffer_pool_recycle string
global_context_pool_size string
java_pool_size big integer 0
large_pool_size big integer 0
olap_page_pool_size big integer 0
shared_pool_reserved_size big integer 192M
shared_pool_size big integer 0
streams_pool_size big integer 0
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sga_max_size big integer 43904M
sga_target big integer 0
memory_max_target big integer 43904M
memory_target big integer 43904M
shared_memory_address integer 0
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Thank you in advance.

Hi,
Most evictions happen due to lost of network connectivity between nodes , resource consumption on the nodes which prevents processes like ocssd , oprocd and cssdmonitor.
or unable to read voting disk, unexpected failures or hangs...
Also if there is any inconsistency of patches across nodes also can cause node eviction. so ensure whatever patches should apply on all the nodes and try to apply latest security patches also. Node eviction is not the only reason for improper SGA settings.
I have setup the memory target=43904M, hugepage not configured (SA not sure how and I am not sure if it will benefit). Our application is a busy ticketing enviornment. I want to be sure the parameters I setup can handle the load, no node evicitons , etc.There are some benefits with hugepages, the page size value can be set 2MB instead of 4kb also whatever memory used by hugepages will be dedicated.
I suggest you to go through with below links.
Very Large Memory and HugePages - http://docs.oracle.com/cd/B28359_01/server.111/b32009/appi_vlm.htm+
Tuning SGA With HugePages - http://docs.oracle.com/cd/B28359_01/server.111/b32009/appi_vlm.htm#CACIBJBB+
*HugePages on Oracle Linux 64-bit [ID 361468.1]*+
And coming to SGA size settings. This should be analyzed once it goes Live , We cannot predict now.
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Sorry may be provided information not much helpful. These days am not in touch with RAC. :)

# of threads required between RAC Primary and RAC Standby

Oracle 11.1.0.7
Primary 3 Node RAC
Standby 2 Node RAC
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ORA-01567: dropping log 9 would leave less than 2 log files for instance play3 (thread 3)
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3 5 +ASM_FRA_DA/dgplay/onlinelog/group_5.8108.813676681             0 UNUSED
6 +ASM_FRA_DA/dgplay/onlinelog/group_6.8109.813676687             0 UNUSED
9 +ASM_FRA_DA/dgplay/onlinelog/group_9.28331.811864225            0 UNUSED
22 +ASM_FRA_DA/dgplay/onlinelog/group_22.18321.811184283           0 UNUSED
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Sherrie

Hi,
You could do:
ALTER DATABASE DISABLE THREAD 3;
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ALTER SYSTEM ARCHIVE LOG GROUP x;
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But of course you should have enough standby redo logs on the standby site to receive redo from the primary site.

How to create a physical RAC standby from a RAC primary on Std Edition 11g

Hi All,
I need to create a physical RAC standby with ASM (2 nodes - Linux) from a RAC primary(2 nodes - linux) with Standard Edition 11g. But I don´t want to use dataguard.
I know that to use dataguard is possible only Enterprise Edition.
Does anybody knows about any documents ID on metalink or any article about this ?
I appreciate if may help me.
Thanks.
Wander(Brazil)

Wander(Brazil) wrote:
Ok, but i need to RAC physical standby with 2 nodes.Yes you can create standby RAC as well and you also can look option of dbvisit which provides high availability even in standard edition with low licensing prices
in detail you can go through with this link http://www.dbvisit.com/products/dbvisit_standby_database_for_oracle_disaster_recovery
>
Wander(Brazil)
     Newbie
Handle:      Wander(Brazil)
Status Level:      Newbie
Registered:      Sep 23, 2005
Total Posts:      116
Total Questions:      21 (20 unresolved)
Name      Wander(BH-Brazil)
Location      BH (Brazil)
Occupation      Database Administrator
>
Please consider closing your old thread as answered.
Edited by: CKPT on May 21, 2013 10:11 AM

Data guard setup for 2 node RAC primary to 2 node RAC standby

Hi All,
I am going to setup data guard for 2 node RAC primary to 2 node RAC standby on Oracle 10.2.0.4. in AIX5L.
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Also, the documents on different scenarios like
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2) If both nodes of standby are failed, how to reciver them?
3) If one node of primary fails, is there any issue?
4) If two nodes of primary fails, is there any issue?
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Have a look at the following location, you may find some similar documents:
http://www.oracle.com/technology/deploy/availability/htdocs/maa.htm
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http://www.oraxperts.com

Rebuild RAC phsical standby with RMAN

Hi all,
Can anyone give any advice as to rebuilding an ACTIVATED RAC physical standby using RMAN? We have been able to revert the db with flashback but I need to know the rebuild method.
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Thanks in advance,
jd
Edited by: jonnyd on 30-May-2010 13:42

...anyone...?

Can I use data guard to create a RAC standby database for a non RAC primary

Hi,
we need to RAC our production database but the normal methods will mean a long outage. It is possible to create a standby as a single node RAC database and when ready do a graceful failover to the standby database and open it for business. The next step would be to create another RAC node from this on the original server.
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Oracle 10.2

Yes, you will be able to setup RAC stnadby for a non-RAC Primary. For primary it just needs a available destination for redo shipping it doesn't matter whether it's RAC enabled or not. And ofcourse you are using 10.2 anyway only one node will be running MRP and that is too in standby mount mode.
However since you have are using You may follow below sequence.
1. Setup a new standby as RAC enabled.
2. Perform a switchover.
3. Shutdown the Old primary (which is standby now).
4. Install CRS and RDBMS on the old primary and it's new node.
5. Modify the cluster_database=TRUE and cluster_database_instances=<required number of instances>.
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6. Introduce the database and instances to the OCR using SRVCTL add command.
7. Once you your database is synchronized with Primary do a switchover.
9. Now you can repeat step 3 to 6 on the other site too. <- if you need your secondary site to be RAC enabled too
10. Finally both the sites should be RAC enabled.
Hope this is helpful!!!
Thanks,
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Rac to non rac standby file name convert option

Hi,
Rac to non rac with ASM both, please find the below details.
Primary Setup.
diskgroup NAME for all files for both primary and standby +DATA
pmon,unique and service name at standby-rac1, rac2
db version -11.2.0.1
platform - HP -UX
$ ps -ef | grep pmon
oracle11 22329 1 0 22:33:55 ? 0:28 ora_pmon_rac1
oragrid 23522 1 0 Jan 2 ? 1:30 asm_pmon_+ASM1
$ ps -ef | grep pmon
oracle11 22329 1 0 22:33:55 ? 0:28 ora_pmon_rac2
oragrid 23522 1 0 Jan 2 ? 1:30 asm_pmon_+ASM2
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diskgroup NAME for all files for both primary and standby +DATA
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so now everything ok... but how do we create a new datafiles at primary for the above setting success, ??? and reflect on standby ???.
1.create tablespace tbs size 10g;
2.create tablespace tbs datafile '+/DATA/RAC/test.dbf size 10g; ??
3.create tablespace tbs datafile '+/DATA size 10g;???
4. directories name on asm and specifying on the convert options is case sensitive ???
Thanks in advance...

thats fine john,
log_file and db_file covert from '+DATA/RAC', '+DATA/racdr'
my primary is rac
my standby us racdr
so i mentioned above folders on convert option, so if i created datafile with or without specifying a diskgroup like mentione below, with or without specifying the directory like below
will all create on under '+DATA/racdr' diskgroup ??
create tablespace test DATA size10m; --> not specidying a full path as DATA/RAC' so will it go to DATA/racdr' ?? or creating under DATA ?diskgroup on standby????
Thanks,

Steps for data guard RAC primary RAC standby

Hi,
I have some doubt in configuring data guard for rac DR to rac primary.
1) In RAC DR, physical standby will be in RAC before starting data guard for RAC Primary , right?.
2) While configuring RAC DR , should one node be down in standby?.
3) After creating the auxiliary database in standby, i mean restoring the rman backup from staging directory in DR,
Shall we have to register the services(database,instance,asm,etc..) to CRS(OCR)?. If yes ,Why?.
4) After DR configure over , Shall i shut/down one node?. Should all the nodes in DR be in up , while applying logs to
standby ?.
If anybody have made the setup and have the prepared document , requesting you to share with me.
Thank you very much,
Sunand

Hi Sunand,
Please follow the following My Oracle Support (MOS) Document ID:
MAA - Creating a RAC Physical Standby for a RAC Primary [ID 380449.1]
For further details, see the referred documents in previous post. Try practicing on VMWare because it will give you the flexibility for creating snapshots to save your work. Please see the answers for your question below:
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Q3. After creating the auxiliary database in standby, i mean restoring the rman backup from staging directory in DR, Shall we have to register the services(database,instance,asm,etc..) to CRS(OCR)?. If yes ,Why?
Answer: Yes, this is recommended for RAC configuration to take advantage of high availability services.
Q4. After DR configure over , Shall i shut/down one node?. Should all the nodes in DR be in up , while applying logs to
standby ?
Answer: You can start up all the instances after DR creation. In this case if your one node goes down log apply services will continue to apply changes in DR.
Hope, this helps to clear your questions.
Regards,
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ORACLE 10G RAC+STANDBY server

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Hi friend,
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thanks

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