Need advice regarding physical standby databases in rac environment on orac

need advice regarding physical standby databases in rac environment on oracle 10G r2
I like to have have a Primary ( 10 node RAC cluster ) shipping to a physical standby ( 3 node RAC cluster ) shipping using LGWR .
So I have a lot of questions
1) What will be the performance overhead on the Primay if we are using LGWR SYNC option .
2) Does the overhead depends on the physical distance between primary & physical
3)Do you recommend a seperate private network for shipping logs between primary and standby.
4) I know that DGMGRL supports RAC only from 10g. So are there any know issues are bugs using DGMGRL is RAC environments.
Thanks in advance
-Satish

Generally you should have same CPU architecture and same operating system but it's not mandatory to have the exactly the same CPU model, the same number of CPU, the same RAM size etc.
Actually starting with 11.1 you don't need to have the same hardware setup: it 's even possible to have primary and standby database on different platforms: http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/standby.htm#i72053.

Similar Messages

Physical standby database in RAC system

Hi EXperts,
We have a 4 nodes 11.2 cluster system. i will set a data guard as a disaster recovery mothods.
As a physical standby database set, does we need to configure same nodes (4 nodes) in other city as primary database cluster system?
Can we set physical standby database is in 2 nodes cluster system and primary database is in 4 nodes cluster system?
Thanks explaining!
Jin

Can we set physical standby database is in 2 nodes cluster system and primary database is in 4 nodes cluster system?Yes. You can setup 2 node RAC as physical standby and also with different memory parameters. But, the only issue is when DB failover from primary to standby, the applications connect to 2 node RAC in place of 4 node RAC and may be overloaded.

Need help on Physical standby database

Currently our physical standby database is running in manual mode and logs are applied by me manually delay of 2 days.
And also when I add a data file in the primary database ,I've to manually add the file again on the standby .
This process is becoming too laborious, now I want to automate this process,
Now my question is
For automating this process ,do I need to bounce the database ?
I want to have 2 days gap for archive log apply process? How should I do that.
And what all parameters I need to change.
Please advice....
Verison Oracle 9.2.0.7
OS-solaris 10

Duplicate thread
[duplicate thread | http://forums.oracle.com/forums/thread.jspa?threadID=699262&tstart=0 ]

Related to recovery in Physical standby database in RAC

In Physical Standby database all instance involved in recovery processes or any one instance will be their in in recovery mode
If is like this another instance will be for high availabily can any one in forum explain me it will be help full

With your Primary database being RAC, the Physical Standby does not have to be RAC, although, obviously it would be preferred to have scalability as required at a DR site.
Whether your Standby is RAC or non-RAC, the automatic Recovery that is done at the Standby is done by one instance only. It would be applying the ArchiveLogs from all the threads (i.e. instances) of the Primary.
Database Recovery is always done by a single instance.
Hemant K Chitale
http://hemantoracledba.blogspot.com

Manually Setting up a Standby Database for RAC Environment

Hi,
I am a Junior DBA so apologies if this sounds like a silly question.
We have production 11g Extended RAC environment setup. Management have asked for a separate single instance database be setup as a standby DB on a separate 'cold' server in case we lose complete connection to both sides of the RAC. I read up on Oracle Data Guard and presented this as a solution, but they seem adamant about manually going in and copying out the latest backup and archive logs over to the standby database.
Can this be done? I mean, can ASM managed backup files and archive logs from one database be simply copied out of the backup directory and imported into a completely separate database as easy as that?
We are using ASM to manage to data files on the RAC. My understanding is that we cant manually access the files on an OS level when using ASM, but maybe I am wrong. Any help or opinions on this would be greatly appreciated.
Rgs,
Rob

Hi,
Can this be done? I mean, can ASM managed backup files and archive logs from one database be simply copied out of the backup directory and imported into a completely separate >database as easy as that?Yes, but depends on DB version.
what is the DB version.
from 11g you have cp command so there is a possibility to copy generated archive logs to standby location, so that you can apply..
In 10g there is no such option. you need to create a standby database. with automatic shipping
Thanks

Data Guard - Steps to install Physical standby database in an RHEL 5.6 x86

HI Team,
I need to install Physical standby database in a OS installed from factory with most basic packages. Please find the info in detail
Standby Server :
Database Version : 10g Release 2
Operating System : Red Hat Enterprise Linux Server release 5.6 (Tikanga) , RHEL 5.6 x86_64
swartis.dc$ free -m
total used free shared buffers cached
Mem: 34158 33847 311 0 558 28367
-/+ buffers/cache: 4921 29237
Swap: 10001 63 9937
- Things i need to validate in the PROD server. Eg : Are the prod db version & standby db version should be the same, Do the OS need to be same ............ETC
- Basic Linux rpm required for standby server & any other pre-requisites required at standby server
- Verify connectivity speed btw servers to decide log file size
- Please give me more detailed steps , where i need to start the steps in installation of Physical standby database.
Thanks in advance.
-- Rakesh
Edited by: Rakesh on Jan 10, 2012 8:23 AM

Hello again;
Sorry for the Delay.
To this question "Do i need to install 10.2.0.2.0 ORACLE_HOME & on top of it apply 10.2.0.3.0 patchset.?"
Yes.
All my Oracle 10 installs started with 10.2.0.1 and then I patched up from there. If I remember correctly 10.2.0.1 may bark on Red Hat 5.
You can work around this by reviewing this file :
/etc/redhat-releaseSave whatever is in there somewhere and replace it with :
redhat-3After the install put back what was there and get rid of the "redhat-3".
I extra RPM's I used were :
rpm -ivh kernel-headers-2.6.18-164.el5.x86_64.rpm
rpm -ivh compat-libstdc++-33* libaio-devel*.x86_64.rpm
rpm -ivh elfutils-libelf-devel*.x86_64.rpm glibc-devel-2* gcc-4*.x86_64.rpm gcc-c++-4*.x86_64.rpm libstdc++-devel-4*.x86_64.rpm glibc-headers*.x86_64.rpm libgomp*.x86_64.rpm
rpm -ivh compat-libstdc++-33* libaio-devel*.x86_64.rpm
rpm -ivh sysstat*I searched my Red Hat Disks before hand and ran the RPM commands as shown. Adjust as needed.
To verify that the required packages have been installed on your system, run the following command :
pm -q --queryformat "%{NAME}-%{VERSION}-%{RELEASE} (%{ARCH})\n" binutils \
compat-libstdc++-33 elfutils-libelf elfutils-libelf-devel gcc gcc-c++ glibc \
glibc-common glibc-devel-2.5 libaio libaio-devel libgcc libstdc++ libstdc++-devel \
make sysstatThis document is for Oracle 11, but the OS part should be the same.
http://www.visi.com/~mseberg/installing_oracle_11g_r2_64.html
Currently I have 3 servers running both Oracle 10 and 11 ( In different homes ) using this OS.
I have used Oracle 11 document with Oracle 10 also : ( Better once you are setup and a great standby recovery document )
http://www.visi.com/~mseberg/duprman2.html
Best Regards
mseberg

Recreating Physical Standby Database

HI
We have Oracle 11gr2 Primary database 2 node RAC using ASM Shared storage and physical standby database non rac using asm storage and data broker Unfortunately the standby site due to hardware failure the network link was down for a long period and huge log of archive waiting ?
We have required restore database and sync the primary to secondary database using data broker how will do it ?
Any help Highly appreciated
Thanks

Hi,
You can roll-forward you standby using incremental backup from primary .
If you use 'DataGuard Broker', then it should be stopped before starting with step 1) from below article and then started again when all steps finished.
Steps to perform for Rolling forward a standby database using RMAN Incremental Backup. (Doc ID 836986.1)
Thanks,
Renu

How to create 11.2.0.2 physical standby database from 2 node RAC (11.2.0.2)

Hi,
Can any one please help me How to manually create 11.2.0.2 standalone physical standby database from 2 node RAC (11.2.0.2) database which is running in RHEL5 and ASM plugged in.
DB : 11.2.0.2
OS : RHEL5
RMAN duplicate is causing problem with network and we decided to go for manual creation of the same.
Thanks in Advance..

Hi;
Can any one please help me How to manually create 11.2.0.2 standalone physical standby database from 2 node RAC (11.2.0.2) database which is running in RHEL5 and ASM plugged in.
DB : 11.2.0.2
OS : RHEL5I had similar issue, what i did
1. Used source oracle_home on standby server
2. Created new asm instance and use same naming
3. I took RMAN full backup on source and move it to target
4. I edit initora file remove RAC setting and restore db(also edited listener file)
Regard
Helios

Questions regarding creating a physical standby database in 10gR2

I'm setting up a physical standby database in a test environment using two windows 2003 servers. I was wondering if someone could answer a few questions I'm not too clear on. I've been thru the data guard manual and as much online information as i can find. I may have it working but wanted to post some things I'm not sure I did quite right.
My tnsnames.ora files.
On my primary database server:
# tnsnames.ora Network Configuration File: F:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.
PRIMARY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = SERVER1)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = PRIMARY.MYDOMAIN.com)
STANDBY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = SERVER2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = STANDBY.MYDOMAIN.com)
On my physical standby database server:
# tnsnames.ora Network Configuration File: f:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.
STANDBY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = SERVER2)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = STANDBY.MYDOMAIN.com)
PRIMARY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = SERVER1)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = PRIMARY.MYDOMAIN.com)
My Listener.ora files:
On my primary database server:
# listener.ora Network Configuration File: F:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = PRIMARY.MYDOMAIN.com)
(ORACLE_HOME = f:\oracle\product\10.2.0\db_1)
(SID_NAME = primary)
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = server1.mydomain.com)(PORT = 1521))
On my physical standby database server:
# listener.ora Network Configuration File: f:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = standby.mydomain.com)
(ORACLE_HOME = f:\oracle\product\10.2.0\db_1)
(SID_NAME = standby)
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = sever2.mydomain.com)(PORT = 1521))
The next item I'm not sure about is after creating the control file for standby use.
One the primary server I created it using:
alter database create standby controlfile as 'sbcontrol01.ctl';
I copied the primary database pfile I had created earlier to the standby server, renamed it and edited it.
Initially I left the CONTROL_FILES= parameter pointing to the control01.ctl, control02.ctl and control03.ctl that I restored. But I was getting the error ORA-01665: control file is not a standby control file
So I copied the sbcontrol01.ctl to sbcontrol02 and sbcontrol03.ctl and pointed the CONTROL_FILES= parameter at them.
The error went away and the database came up. I still need to test it some more but wanted to see if what i did was correct or a fluke.
Edited by: tjohnson on Mar 23, 2009 2:26 PM

If in the primary I had control files named control01, control02 and control03 would I have been able to create a standby controlfile called control01.ctl or would I have had to name it something else like I did (sbcontrol01.ctl) and rename it to control01.ctl once I got it over to the standby database server?Suppose you have the primary database control file in C:\oracle\primary\control location with names control01.ctl and control02.ctl. Then also you can create a standby controlfile with control01.ctl and control02.ctl , but then the location to be created must be different.You can create it in C:\oracle\primary location and then transfer to the specified location mentioed in the pfile of the standby database and mount the standby database.
But saying this i would suggested to keep the name different from control01.ctl as far as naming conventions are followed.It might confuse someoe whether its a primary database controlfe or a standby database controlfile.Usally primary database controlfile are named control01.ctl , coltrol02.ctl etc and for standby many do prefer keeping standby01.ctl, standby02.ctl.Thats just for for understanding.
HTH
Anand

Failover To Physical Standby Database

We have 3 node RAC 11.2.0.3 Primary database data guarded to a 3 node RAC 11.2.0.3 Standby database. There is an activity scheduled to perform some of order extracts in the database which is going to result in a lot of changes. Currently the discussion is on whether what should be the quickest way to go back to a point in time before the extract process starts in case of any issues. The options that we are looking at are:
1) Create a guaranteed restore point on both the Primary and Standby and use this to flashback the database (Quick but we have had issues where in the guaranteed restore point still does not guarantee the availability of the flashback logs) - Tested
2) Use RMAN backup from a day before to restore and recover to point in time before the extract process began (Time consuming) - Tested
3) Use export backup to perform a redirected restore i.e import the data from before the extract process (Time consuming) - Tested
4) Create a guaranteed restore point on both Primary and Standby, stop the Redo Apply/Ship at the time we create the guaranteed restore point and at a point we face some issue and need to go back, simply failover to the physical standby database and then reinstate the new standby database - This has not been tested yet but seems a viable option
With regard to the point 4, note that we are not concerned about data loss as the whole point of stopping the redo apply is to prevent the standby to be caught up with Primary during the run of the extract process. The question is whether the dataguard broker will allow failover of the primary to standby, in a situation described in bullet point 4). Please advice.

HI,
Please check this link:
Physical Standby Database SWITCHOVER &amp; FAILOVER Operations | Talip Hakan Ozturk&#039;s ORACLE BLOG
Thank you

OEM for physical standby database

Hello All,
I am using Oracle 11.2.0.3. My enterprise manager is db console 11.2
I have Oracle Enterprise manager dbcnsole for my RAC primary database and I have created through sqlplus command line a physical standby database.
My questions
Can I use the RAC primary dbconsole to monitor my physical standby database? if yes what the steps?
Is it mandatory to use grid control in that case? if yes, what steps are needed to implement grid control ?
Regards,

Hi,
It is not possible to monitor/administer a Logical or Physical Standby database, i.e Data Guard, using Enterprise Manager Database Control. This is primarily due to the fact that Database Control is designed to monitor 1 database and a Data Guard environment, by definition, includes more than 1 database.
If you attempt to run emca against a standby Database, you will get an error like (i.e. ORA-01219: database not open).
Database Control, can, of course, be used to monitor the current Primary database (with no ability to administer or monitor Data Guard related functionality). In such a case, when failover occurs Database Control must be reconfigured to run on the new Primary database using the commands detailed in Note 278100.1 How To Drop, Create And Recreate DB Control In A 10g Database, section C. Recreate/ReConfig DB Control, Option 2. Recreate the DB Control Configuration Files and Repository.
Enterprise Manager Grid Control or Cloud Control provides the functionality for viewing, monitoring, and administering primary and standby databases in a Data Guard configuration.
Reference: Is it Possible to Configure Database Control for a Logical or Physical Standby Database? (Doc ID 315116.1)
Using EM cloud control 12c is best available option to monitor your standby databases
For install docs refer to
http://docs.oracle.com/cd/E24628_01/install.121/e22624/toc.htm
For Software download link
http://www.oracle.com/technetwork/oem/enterprise-manager/downloads/index.html
Regards,
Rahul

Differences in creating a Standby database in RAC

Hi All
   SO...: Solaris 11 SPARC 64
   DB...: 11.2.0.3.6 (64 bits)
   My experience regarding creating Physical Standby Databases is restricted in only single instances to single instances. I am reading the book "Oracle Database 11g Release 2 High Availability", but, in parallel, i would like to hear from the experienced DBAs here some opinions and recomendations in how to implement a RAC to RAC solution. Below are my doubts:
   1) In single instance, using RMAN Backup to create the Physical Standby, i have to create manually a static Listener Entry. But in a RAC env, the listener is a resource, so, i have to create that resource in the Clusterware manually, or there is other approach?
   2) I have to create a pfile and start the instance in NOMOUNT mode, but in RAC, i have to start all the nodes in NOMOUNT, or just one node is sufficient?
   3) The archives will be replicated from FRA to FRA. Is this the best approach?
   My main concern is with the Listener and SCAN questions... If you have any considerations, they will be most welcome.
   Thanks in advance.

Following link might be helpful
http://www.oracledba.org/11gR2/dr/11gR2_dataguard_RAC_to_RAC.html

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))
I've created a physical standby database, but since I am running Standard Edition, I am not using the DataGuard features. I use the rsync utility to copy over the archivelogs to the standby database, and I apply them periodically to the standby database.
The standby database is started this way :
startup nomount pfile='/u01/oradata/orcl/initorcl.stdby';
alter database mount standby database;
Everything runs perfectly fine, I can do "alter database open read only" and then I can do selects into tables to confirm that everything is up to date.
The thing is, if I shutdown immediate the database, then do just startup :
shutdown immediate;
startup;
The database opens with no error messages, but is still in read-only mode...
I read that the default behavior for a standby database is to open read-only, like I am experiencing, but I would like to know what is the right way to open it correctly in read-write mode (I understand that after that, my standby will not be standby anymore and that I will have to recreate my standby database).
Thanks,
Mat

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

CREATING A SINGLE INSTANCE PHYSICAL STANDBY FOR A RAC PRIMARY

Hi
Creating a single instance physical standby database for a RAC Primary.
Getting this error.
sql statement: alter database mount standby database
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 01/17/2008 23:05:38
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of sql command on clone_default channel at 01/17/2008 23:05:38
RMAN-11003: failure during parse/execution of SQL statement: alter database mount standby database
ORA-01103: database name 'PROD' in control file is not 'DPROD'
Any help on this.
Regards
Satish

The problem here is probably with your standby init.ora file.
When you create a standby database, the db_name parameter must NOT change. It has to match the primary database. So in your case, db_name ='PROD' and your db_unique_name='DPROD'...
-peter

Test physical standby database in dataguard

Hi all,
I had a successfull dataguard implementation for oracle 9r2.
Primary and standby databases are on different nodes, logs from primay are shipping and applying to physical standby database successfully.
As these database are for oracle 11i ebs, so for testing dataguard status i had created a table manually having columns date and remarks. Periodically i insert few records in this table in primary database and then chek this tabel in standby database (by opening in read only mode).
Now i want to test physical standby database with applications tier but don't want to disturb origional primary database.
as these are the normal switchover steps
1) at primary db
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;
2) at standby
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
3) at primary, now this will be the stand by database
SHUTDOWN IMMEDIATE;
STARTUP MOUNT;
4) at standby, now this will be the primary database
SHUTDOWN IMMEDIATE;
STARTUP
My concern is if i skip step 1 and 3 and only execute step 2 and 4, will that be applicable for my requirement, or there is some other way to achieve this goal.
Regards,
Ken

To avoid touching the primary production DB, you may try to use the following command on your standby database side:
alter database activate standby database;
This will turn your standby database to primary database, however the log will be reset and this means you will need to rebuild your DR.
Another way is to use flash back feature on your standby database, activate it and revert back to the flashback point when the DR testing is done.

Need advice regarding physical standby databases in rac environment on orac

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