Goldengate from physical standby with Active data guard or from logical standby - which is better?

Hi,
We have Oracle 11.2.0.4 and are currently using Active Data Guard on a physical standby. My boss wants me to use Goldengate
to replicate several schema from Oracle to SqlSserver. She doesn't want to touch the Primary, which is in production. Would it be better
to setup a Logical standby for Goldendate to use, in addition to the Physical standby? Or will it be sufficient to use the Physical standby?
The application tables don't all have primary keys. I'm trying to decide if the Logical standby adds another layer of complexity or would
introduce delays in getting the data from Oracle to Sqlserver.
Thanks in advance,

Hi,
In this case I recommend you to use physical standby + Golden gate with ALO mode. You might have sligthly more trouble in logical standby. it means you might have more trouble at Goldengate's extract side.
You said
The application tables don't all have primary keys.
so you have to add keycols on replicat side.
I recommend you to add an index which should consist of keycols columns. it will be necessary for replicat performance.
Best Regards

Similar Messages

Using Oracle EM 11g with Active Data Guard 11g

Has anyone installed Active Data Guard 11g with OEM 11g for an active-active state or know if there are any installation procedures with these two products? We will be installing these products this year. Thanks, Cathy

If you already have both servers configured in Grid Control as targets, it should be fairly easy to create a standby database on server B. OEM has Availability tab on your primary database Instance section should have "Data Guard" section which has "Setup and Manage" option. You follow through the wizard, and it will generate a standby database on server B. Then you can convert your standby db on server B to Active Read-only database by clicking few more buttons.
If you do not have these two servers configured on your Grid Control, that would be the first task.
We set up three standby databases using Grid Control 11g in our test boxes, and they worked very well. Our biggest problem was to actually installing the Grid Control, but once installed, everything was easy.

Active data Guard but with delay on applying redo logs

Hello,
A question: Active Data Guard gives the possibility of having a physical stand-by database open read-only, for instance for making 'up-to-date' reports.
Data Guard also has the possibility to apply logs with delay, for instance with a delay of some hours. Every commit on primary database is applied to standby after the delay period.
Can this delay be combined with Active Data Guard? This means that standby database is open read-only but with the delay... In case the delay is 2 hours, every report created on standby is ("up-to-date" minus 2 hours)...
Thanks for your answer,
Jan.

Hello All,
I answered my own question: indeed it is possible to activate 'real time apply' but with a delay in applying the logs. In EM-11 check the box "enable real time query" and apply. Nect go to thje tab "standby role properties" and change the value after "Apply delay" to for instance 30 minutes. Apply also.
Log on on the primary, create a table, insert some rows and do some logswitches. Log in on the standby and check for the new table. Notice that after 30 minutes the switched logs are applied, even when you change the delay period within the 30 minutes. The information about the delay seems to be in the log, since it is possible to change the delay immediately after the logswitches to 3 minutes, drop the table and do some logswitches again. The logs with the 'create table' statement in it are NOT applied after 3 minutes, but still after 30 minutes. The drop of the table however is done after 3 minutes on the standby. So the 'delay' information is in the log sent over to the Stand-by!

Active Data guard with R12.1.X

Hi
One of our customers wants to configure their EBS R12 Instance with Active Data guard
Current Architecture:
R12.0.6 with RDBMS 10.2.0.4
Projected Architecture:
R12.1.3 with 11.2.0.3 RDBMS with Active Data guard.
I have checked the MOS ID :
Using Active Data Guard Reporting with Oracle E-Business Suite Release 12.1 and Oracle Database 11g [ID 1070491.1]
Please share your ideas and doc id's to do this activity successfully.
Please share the docs to upgrade R12.0.6 to R12.1.1
Thanks
Shaik

One of our customers wants to configure their EBS R12 Instance with Active Data guard
Current Architecture:
R12.0.6 with RDBMS 10.2.0.4
Projected Architecture:
R12.1.3 with 11.2.0.3 RDBMS with Active Data guard.
I have checked the MOS ID :
Using Active Data Guard Reporting with Oracle E-Business Suite Release 12.1 and Oracle Database 11g [ID 1070491.1]
Please share your ideas and doc id's to do this activity successfully.The document you posted covers every thing in detail.
In details you can check
http://appsdbastuff.blogspot.com/2009/07/configuring-standby-databasedataguard.html
Disaster recovery for R12.1.1
Please share the docs to upgrade R12.0.6 to R12.1.1Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.1.1) for Linux x86 [ID 761564.1]
Oracle E-Business Suite Release 12.1.1 Maintenance Pack Installation Instructions [ID 752619.1]
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Thanks

Active data guard standby database

Hello,
we have to choose which technology to use for maintain Oracle backup center synchronized with main center. This backup center should be read only, and data generated in main should be replicated into backup. So I would like to use Active Data Guard, but I have a possible issue with reading in backup center, because reading is not just select, but filling(inserting data) some temporary tables (from client side, and from procedures in database). Will Standby database in backup center allow this if Active Data Guard is used. We would go with Oracle 11gR2.
Also other suggestions on replication technologies (I know there are RAC, ADG, Oracle Streams, Golden Gate), or any document which would help us decide which of these technologies would suit our needs the best.
Thank You.

Hi,
user12121832 wrote:
we have to choose which technology to use for maintain Oracle backup center synchronized with main center. This backup center should be read only, and data generated in main should be replicated into backup. So I would like to use Active Data Guard, but I have a possible issue with reading in backup center, because reading is not just select, but filling(inserting data) some temporary tables (from client side, and from procedures in database). Will Standby database in backup center allow this if Active Data Guard is used. We would go with Oracle 11gR2. You can use Standby Database to make yours Backup.
In 11.1 or later you can use feature "Snapshot Standby Databases" if this write on database is temporary (i.e you will not use the new data) and at backup time you not need use Snapshot Standby Database feature.
A snapshot standby database is a physical standby database that you temporarily convert into an updatable standby database. You can use snapshot standby databases as clones or test databases to validate new functionality and new releases, and when finished you then convert the database back into a physical standby. While running in the snapshot standby database role, it continues to receive and queue redo data so that data protection and the RPO are not sacrificed.
A snapshot standby database has the following characteristics:
* A snapshot standby database cannot be the target of a switchover or failover. A snapshot standby database must first be converted back into a physical standby database before performing a role transition to it.
* A snapshot standby database cannot be the only standby database in a Maximum Protection Data Guard configuration.
Note:
Flashback Database is used to convert a snapshot standby database back into a physical standby database. Any operation that cannot be reversed using Flashback Database technology will prevent a snapshot standby from being converted back to a physical standby.
http://docs.oracle.com/cd/E11882_01/server.112/e17157/unplanned.htm#HAOVW11832
Also other suggestions on replication technologies (I know there are RAC, ADG, Oracle Streams, Golden Gate), or any document which would help us decide which of these technologies would suit our needs the best.If you need "standby" database opened in read-write all time the best option is to use Golden Gate.
Regards,
Levi Pereira

RMAN in active data guard with real time apply ON without a catalog DB

I would like to know whether I can take RMAN backups (both level 0 & incremental) in active data guard with real time apply ON without a catalog database. version is 11.2.0.3.2. Will it make difference in the control file of standby syncing with primary? Can I use these backups on primary to restore and recover the database(including control file backup)?

Thank you very much msberg. Could you please answer the below queries as well?
Should I cancel Real Time Apply before starting RMAN?
Will it make difference in the control file of standby syncing with primary? Is it possible to use these backups on primary to restore and recover the database(including control file backup)? If possible, how will I do that?

Difference between physical standby database and Data Guard

Hi guys,
Today I attended one interview. They asked me a difference between the Oracle Physical Standby database and Oracle Dataguard?
Upto my knowledge Oracle Physical Standby Database is one type of Standby Database can be configured using Oracle Databaguard Feature.
Can you people calrify me on this.
Regards,
Vijayaraghavan K

hello,
yes you are right upto some extent...here is para form oracle doc
Oracle Data Guard is the most effective and comprehensive
data availability, data protection, and disaster recovery solution
for enterprise databases. It provides the management, monitoring,
and automation software infrastructure to create and maintain one
or more synchronized standby databases to protect data from failures,
disasters, errors, and corruptions.
Data Guard standby databases can be located at remote disaster
recovery sites thousands of miles away from the production data center,
or they may be located in the same city, same campus,
or even in the same building. If the production database
becomes unavailable because of a planned or an unplanned outage,
Data Guard can switch any standby database to the production role,
thus minimizing downtime and preventing any data loss.oracle data guard is maximum availiblity solution which maintain physical standby databases and in case of failure of production can switch production role to and standby database.
read it here
http://www.oracle.com/technology/deploy/availability/htdocs/DataGuardOverview.html
thanks and regards
VD
Edited by: Dixit on Aug 31, 2009 1:35 AM
Edited by: Dixit on Aug 31, 2009 1:36 AM

Need suggestion on Active data guard or Logical Stand by

Hi All,
Need a suggestion of on below scenario.
We have a production database ( oracle version 11g R2 ) and planning to have a Logical standby or physical standy (Active data guard). Our usage of the standby database is below.
1) Planning to run online reports (100+) 24x7. So might create additional indexes,materialized views etc.
2) daily data feed ( around 300+ data files ) to data warehouse. daily night, jobs will be scheduled to extract data and send to warehouse. Might need additional tables for jobs usage.
Please suggest which one is good.
Regards,
vara.

Hello,
In active dataguad Whig is feature from 11gRx ,
If you choose active dataguard, you have couple of good options, one is you can make a high availability of your production database, which can act as image copy of production, as you are asking in 11g you have more advantage where you can open in read only mode and at the sometime MRP will be active, so you can redirect users to connect standby to perform select operations for reporting purpose. So that you can control much load on production ,
Even uou can perform switchover in case of role change, perform failover if your primary is completely lost. Also you can convert to physical to logical standby databases & you can configure FSFO
You have plenty of options with active dataguard.
Refer http://www.orafaq.com/node/957
consider closing the thread if answered and keep the forum clean.
>
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user11261773
Handle:     user11261773
Status Level:     Newbie
Registered:     Jul 14, 2011
Total Posts:     12
Total Questions:     6 (5 unresolved)
>
Edited by: CKPT on Mar 18, 2012 8:14 PM

DB link problem between active Data Guard and report application database

My database version in 11.2.0.2.0 and OS is Oracle Solaris 10 9/10.
I am facing a problem in my Active data guard Database for reporting purpose. Active Data guard information is as below.
SQL> select name, database_role, open_mode from v$database;
NAME DATABASE_ROLE OPEN_MODE
ORCL PHYSICAL STANDBY READ ONLY WITH APPLY
Problem detail is below
I have created a db link (Name: DATADB_LINK) between active data guard and report application database for reporting purpose.
SQL> create database link DATADB_LINK connect to HR identified by hr using 'DRFUNPD';
Database link created.
But when I run a query using db link from my report application database I got this below error.
ORA-01555: snapshot too old: rollback segment number 10 with name "_SYSSMU10_4261549777$" too small
ORA-02063: preceding line from DATADB_LINK
Then I check Active Data Guard database alart log file and get below error
ORA-01555 caused by SQL statement below (SQL ID: 11yj3pucjguc8, Query Duration=1 sec, SCN: 0x0000.07c708c3):SELECT "A2"."BUSINESS_TRANSACTION_REFERENCE","A2"."BUSINESS_TRANSACTION_CODE",MAX(CASE "A1"."TRANS_DATA_KEY" WHEN 'feature' THEN "A1"."TRANS_DATA_VALUE" END ),MAX(CASE "A1"."TRANS_DATA_KEY" WHEN 'otherFeature' THEN "A1"."TRANS_DATA_VALUE" END )
But the interesting point if I run the report query directly in Active Data Guard database, I never got error.
So is it a problem of DB link between active Data Guard and other database?

Fazlul Kabir Mahfuz wrote:
My database version in 11.2.0.2.0 and OS is Oracle Solaris 10 9/10.
I am facing a problem in my Active data guard Database for reporting purpose. Active Data guard information is as below.
SQL> select name, database_role, open_mode from v$database;
NAME DATABASE_ROLE OPEN_MODE
ORCL PHYSICAL STANDBY READ ONLY WITH APPLY
Problem detail is below
I have created a db link (Name: DATADB_LINK) between active data guard and report application database for reporting purpose.
SQL> create database link DATADB_LINK connect to HR identified by hr using 'DRFUNPD';
Database link created.
But when I run a query using db link from my report application database I got this below error.
ORA-01555: snapshot too old: rollback segment number 10 with name "_SYSSMU10_4261549777$" too small
ORA-02063: preceding line from DATADB_LINK
Then I check Active Data Guard database alart log file and get below error
ORA-01555 caused by SQL statement below (SQL ID: 11yj3pucjguc8, Query Duration=1 sec, SCN: 0x0000.07c708c3):SELECT "A2"."BUSINESS_TRANSACTION_REFERENCE","A2"."BUSINESS_TRANSACTION_CODE",MAX(CASE "A1"."TRANS_DATA_KEY" WHEN 'feature' THEN "A1"."TRANS_DATA_VALUE" END ),MAX(CASE "A1"."TRANS_DATA_KEY" WHEN 'otherFeature' THEN "A1"."TRANS_DATA_VALUE" END )
But the interesting point if I run the report query directly in Active Data Guard database, I never got error.
So is it a problem of DB link between active Data Guard and other database?
Check this note which is applicable for your environment
*ORA-01555 on Active Data Guard Standby Database [ID 1273808.1]*
also
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:8908307196113

Active data guard config

Hi,
We am trying to create a active data guard config on 2 physical machines. We have a standby created and working properly, but getting issue whilesetting up and active data guard configuration.
Added Primary and Standby database on primary server's DGMGRL's configuration. (haven't done anything on standby yet)
DGMGRL> show configuration
Configuration - DGConfig1
Protection Mode: MaxPerformance
Databases:
prod - Primary database
dr - Physical standby database
Error: ORA-16664: unable to receive the result from a database
Fast-Start Failover: DISABLED
Configuration Status:
ERROR
Primary database listener:_
[oracle@prod log]$ cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = prod.localdomain)(PORT = 1521))
ADR_BASE_LISTENER = /u01/app/oracle
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = prod)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = prod)
(SID_DESC =
(GLOBAL_DBNAME = prod_DGMGRL)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = prod)
Standby database listener:_
[oracle@dr ~]$ cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.162)(PORT = 1521))
ADR_BASE_LISTENER = /u01/app/oracle
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = dr)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = dr)
(SID_DESC =
(GLOBAL_DBNAME = dr_DGMGRL)
(ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1)
(SID_NAME = dr)
TNS Entry on both:_
[oracle@dr ~]$ cat /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
PROD =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.161)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = prod)
DR =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.162)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = dr)
Article followed for DG creation : http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/11g/r2/prod/ha/dataguard/dg_broker/dg_broker.htm
Please suggest where is it going wrong??
Regard!

Thanks for the reply Anand..
Please find the last few lines of drcprod.log
2012-06-04 15:28:15.733 00001000 943900813 DMON: Entered rfm_get_chief_lock() for MON_VERIFY, reason 0
2012-06-04 15:28:15.734 00001000 943900813 DMON: chief lock convert for client healthcheck
2012-06-04 15:28:15.735 INSV: Received message for inter-instance publication
2012-06-04 15:28:15.735 req ID 1.1.943900813, opcode MON_VERIFY, phase BEGIN, flags 5
2012-06-04 15:28:15.807 INSV: Reply received for message with
2012-06-04 15:28:15.807 req ID 1.1.943900813, opcode MON_VERIFY, phase BEGIN
2012-06-04 15:28:15.810 00000000 943900813 DMON: Entered rfm_release_chief_lock() for MON_VERIFY
2012-06-04 15:30:14.823 00000000 943900816 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.825 00000000 943900817 DMON: GET_DRC: success. (len = 226)
2012-06-04 15:30:14.827 00000000 943900817 DMON: GET_DRC operation completed
2012-06-04 15:30:14.846 01000000 943900818 DMON: GET_SITE: success. (len = 316)
2012-06-04 15:30:14.848 01000000 943900818 DMON: GET_SITE operation completed
2012-06-04 15:30:14.855 02000000 943900819 DMON: GET_SITE: success. (len = 306)
2012-06-04 15:30:14.858 02000000 943900819 DMON: GET_SITE operation completed
2012-06-04 15:30:14.861 01000000 943900820 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.864 01010001 943900821 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.866 01010001 943900822 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.868 01010001 943900823 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.870 01010001 943900824 DMON: CTL_GET_STATUS operation completed
2012-06-04 15:30:14.871 02000000 943900825 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.873 02010001 943900826 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.874 02010001 943900827 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.876 02010001 943900828 DMON: MON_PROPERTY operation completed
2012-06-04 15:30:14.879 02010001 943900829 DMON: CTL_GET_STATUS forwarded to site dr for processing
2012-06-04 15:30:14.889 02010001 943900829 DMON: CTL_GET_STATUS operation completed
Also now without any change it gives:
DGMGRL> show configuration
Configuration - DGConfig1
Protection Mode: MaxPerformance
Databases:
prod - Primary database
dr - Physical standby database
Warning: ORA-16809: multiple warnings detected for the database
Fast-Start Failover: DISABLED
Configuration Status:
WARNING
Database is 11.2.0.2, please suggest how to proceed??
Regards!

Active Data Guard and Undo and ora-01555

Hi
We have an 11.1.0.7 two-node RAC primary with a single instance Active Data Guard physical standby. When running a datapump export from the standby, we get an ORA-01555 although the undo_retention is set way beyond the run time for the export.
I'm looking to better understand undo within the context of Active Data Guard. Is there any dependency for undo between the primary(s) and standby? Are the undo settings (undo_retention, undo tablespace size..) on the primary and standby independent of each other?
Thanks.

The standby is a Physical Standby. An exact copy of the Primary. The undo at the standby is controlled by the redo coming from the Primary. When the undo gets overwritten at the Primary it gets overwritten at the standby regardless of what is running there. You can't have undo kept around longer at the standby, it is an EXACT copy of the Primary.
Increasing the undo tablespace and the undo_retention at the Primary will allow more undo to be kept at both the Primary and the Standby but the standby is still controlled by the Primary's management of the undo. Of course you should change the parameter at the standby too so that everything behaves the same when you make the standby a Primary database.
Hope this helps.
Larry

Does Oracle 10g support Active Data-guard?

Hi all,
Can Oracle Database 10g support Active Data-guard?
Thanks you!
Dan
Edited by: Dan on Jul 12, 2011 10:13 AM

no, active data guard is 11gR1 new feature.
In Oracle Database 10g and below you could open the physical standby database for read-only activities (say, to offload some reporting), but only after stopping the recovery process. With these releases, If Data Guard is a part of your DR solution, you really can't afford to pause the recovery process for a long duration for fear of falling behind, so the physical standby database is essentially useless for any read-only activity.
With Oracle Database 11g, that situation changes: You can open the physical standby database in read-only mode and restart the recovery process. This means you can continue to be in sync with primary but can use the standby for reporting. (As in previous versions, you can take the backup from the standby as well.)
refer:- http://www.oracle.com/technetwork/articles/sql/11g-dataguard-083323.html

Active Data Guard VS Golden Gate

Hi Experts,
I am looking for High Availability and Disaster Recovery architecture for my data layer i.e. Oracle Database 11g R2
We have two physical locations and the distance between two sites is around 20 miles.
Site 1:
We already implemented RAC setup with two node in site 1.
Site 2:
We are going to implement standalone database. (Not RAC)
My requirements:
1. Both databases at Site 1 & Site 2 should be replica of each other.
2. Both databases should be in sync always.
3. Site 1 is active and Site 2 is stand by.
4. Client applications on Site 1 & Site 2 should always talk to RAC database on Site1.
5.. If RAC at site 1 goes down completely, then ONLY client apps should connect to Site2 database without human intervention.
How can acheive my requirement ? I was doing some research & found two solutions. 1. Active Data Guard 2. Golden Gate.
Questions:
1. Do Data Guard and Golden Gate offers same features ?
2. Which products offers solutions to all my requirements or Do I need to use both ?
3. If Data Guard and Golden Gate are different from each other then What is the difference between them and what are the overlapping features among them ?
Thanks

Hi;
Both tool are HA tool. Please see below link
Thanks for the question regarding "Data guard vs Streams vs GoldenGate", version 11.2.0.2
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:3349335100346299316
Golden Gate versus Data Guard for replication
Golden Gate versus Data Guard for replication
If you have still question please update thread
Regard
Helios

Active Data Guard Licensing

I have no idea where to ask this question and if I'm asking in the wrong forum I'd appreciate it if someone can direct me to the right one.
I have a physical standby server and I'd like add the Active Data Guard option to it to offload ETL processing. If I want to use named user plus licensing, how many named users to I need to pay for? There is only 1 server, 1 process, and 1 user that will be pulling data from this standby server into a SQL Server landing store database. Eventually the data will make it into a data warehouse (also SQL Server), SQL Server Reporting Services, and SQL Server Analysis Services. Between SSAS and SSRS there might be 100 distinct users on the front end, but they are all several levels removed from the standby server.
So the question is how many named users do I need to buy? The definition of "named user plus" in the licensing definitions is about as clear mud. I think I only need 1. But it could be 25 based on minimum # of users for EE. And it could be 100 if every user of SSRS and SSAS is counted individually.
I'm trying to avoid doing processor based licensing which is equally unclear but on initial impression seems to be much more expensive. The standby server in question has 2 dual core intel xeon processors, running on Windows 2008 R2. The version of Oracle is 11GR2 Enterprise Edition. If I've done the math right, processor licensing comes out to 23k.

Hello;
Active Data Guard does need a license and you are in the correct forum. But only your Oracle salesperson can answer this question.
Was at Cloud Control class last month and several DBA's there thought everyone has a similar license agreement. Not true. So somebody here might guess at your answer, but in the end only Oracle's answer will count.
Best Regards
mseberg

Active data guard - patching

Hi Gurus,
I have primary db amsprd and active data guard amsprd_stby.
we are planning to apply application patches in amsprd. earlier we used to rely on rman backup for restore in case of any failures.
I would like to make use of standby as primary and keep the business up immediately after application patch failures.(to reduce the downtime - application failures are not having any rollback steps :-( - vendor product).
to achieve this,
before application patch application
do i have to just stop the log shipping?
or do i have to stop just log file apply?
what are the steps involved in case of primary applicaiton patching failures.
Thank you.

So the Application Patch may turn out as a "Logical Mistake" from the Database perspective.
One option would be to stop the Apply on the Standby Database. If your Application Patch was no good, you could do an "Immediate Failover" which will open the Standby immediately without applying the received redo first like an ordinary Failover would. You would have to create a new Standby Database on your Ex Primary site then.
Another option would be to turn on Flashback Logging on both sites. If your Application Patch was ok - nothing to do. If not, flashback both sites to before the App Patch. Look here for an example:
http://uhesse.wordpress.com/oracle-database-ha-architecture/2010/08/06/using-flashback-in-a-data-guard-environment/
Second option has the benefit that you do not delay an emergency failover, should your Primary incidentally get destroyed during the App Patch. Also, if you need to rewind the Logical Mistake, you do not need to recreate the Standby completely. If you are on 11gR2, you can even turn on/off Flashback Logging without having to restart:
http://uhesse.wordpress.com/2010/06/25/turning-flashback-database-on-off-with-instance-in-status-open/
Kind regards
Uwe Hesse
http://uhesse.wordpress.com

Goldengate from physical standby with Active data guard or from logical standby - which is better?

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