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

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Active Data Guard in different database versions (11.2.0.3 and 11.2.0.4)

In case of Active Data Guard can i run different database versions (11.2.0.3 and 11.2.0.4) at Primary and DR for production environment ? And will having RAC in environment make any difference?

Hi,
>>In case of Active Data Guard can i run different database versions (11.2.0.3 and 11.2.0.4) at Primary and DR for production environment ?
As per normal Data Guard requirement, Oracle 11.2 does support flexibility where Primary and Standby may have different hard wares such as CPU architecture and OS etc. but the Oracle RDBMS software version must be the same. Having said so does not mean it will not support it. Beginning with 11.1.07, a physical standby database can be used to execute a rolling database upgrade to a new Oracle Patch Set or database release by using the transient logical rolling database upgrade process. It means you can have with different database version but for how long, you need to check above documents.. For complete information you should read this note:
Data Guard Support for Heterogeneous Primary and Physical Standbys in Same Data Guard Configuration (Doc ID 413484.1) &
http://www.oracle.com/technetwork/database/features/availability/maa-wp-11g-transientlogicalrollingu-1-131927.pdf
2) >> And will having RAC in environment make any difference?
NO. You can find answer at - https://docs.oracle.com/cd/E11882_01/server.112/e41134/standby.htm#SBYDB4716
**The primary database can be a single instance database or an Oracle Real Application Clusters (Oracle RAC) database. The standby databases can be single instance databases or Oracle RAC databases.
HTH,
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Hi,
I'm looking to setup current E-business Suite R12.1.3 application without any down time. I've Primary Data Center and Secondary Data Center. I would like to setup seamless failover to another secondary data center in case of 1st data center failure.
Can be this achieved by using Active Data guard? If not what would be best solution? In case of active data guard can I failover site to secondary data center and apply patches on primary site?
I want to acheive 100% availability of application. Any suggestions are welcome!
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user587327 wrote:
Hi,
I'm looking to setup current E-business Suite R12.1.3 application without any down time. I've Primary Data Center and Secondary Data Center. I would like to setup seamless failover to another secondary data center in case of 1st data center failure.
Can be this achieved by using Active Data guard? If not what would be best solution? In case of active data guard can I failover site to secondary data center and apply patches on primary site?
I want to acheive 100% availability of application. Any suggestions are welcome!
ThanksPlease refer to these docs.
Business Continuity for Oracle E-Business Release 12 Using Oracle 11g Physical Standby Database [ID 1070033.1]
Using Active Data Guard Reporting with Oracle E-Business Suite Release 12.1 and Oracle Database 11g [ID 1070491.1]
Oracle E-Business Suite Release 12 High Availability Documentation Roadmap [ID 1072636.1]
Thanks,
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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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Edited by: CKPT on Mar 18, 2012 8:14 PM

What are the pros and cons using Active Data Guard vs Data Guard?

My understanding is that Active Data Guard is an additional database option for Oracle 11gR2 Enterprise Edition. I need to know the pros and cons using Active Data Guard vs Data Guard in order to decide whether to get pay extra for the Active Data Guard.
Thanks for any help.

Hemant K Chitale wrote:
Before jumping in to Active Data Guard, one needs to evaluate :
a. Is there really a need to run queries on the Standby ? The Standby could / should be at a remote site so queries are "across the network". Depending on the nature of the queries and the volume of output, the "performance" of the queries may not seem to be the same.
b. If the database is not in Maximum Protection mode, the data "seen" at the standby may not be in "real-time" synch
c. Not all applications are truely read-only when querying. Some applications use "jobs" that write to tables when querying. Such would not work with Active DataGuard. (example : EBusiness Suite). There are very complicated ways of handling this -- and one needs to consider if the complications can be introduced and supported.
Over the network accessing standby read only is really not an good idea, I think no one will compare performance with primary and standby,
But some of them they want to validate data which are very critical, as it is matching with primary or not, Its an added advantage with ACTIVE DATAGUARD
Prior to that until unless stop MRP, open database and then we need to validate, So there is an interruption of recovery, I can say its also an advantage where there is no interruption of recovery.

Urgent : ORA-01426: numeric overflow on oracle 11g Active Data Guard

Hi
I have configured Active Data Guard on oracle 11g, for reporting purpose we will select mutliple querry on target side(10 users). we are getting 'numeric overflow erro'r on alert log file When we issuing multiple query on target side. PLeae let me know is this error will cause performance degrad. if it will degrade performance mean please tell me how to resolve this problem. Why the numeric overflow is comming . and it is not comming in the primary database, it is comming in standby database only. please any one help it is very urgent
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Please please it is very important to me and very urgent .
Thanks
nafees
Edited by: Nafees on Jan 1, 2009 3:44 AM
Edited by: Nafees on Jan 1, 2009 3:54 AM

There is no one drowning.
Your house is not on fire.
The volcano has not exploded.
Please apologize for abusing this forum by claiming your issue is more urgent than other people's requests.
Then, and only then, should anyone help you. I know I certainly won't until I read your sincere apology and promise not to be abusive in the future.

Oracle11g R2 Active Data guard using ASM Problem?

I have configured oracle11g r2 RAC on 2 notes using ASM Grid ( OS unix).
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Now I am configuring Active data Guard.
Under grid user instance +ASM and listener is running.
Under oracle user static listener is running.
All disk is mounted.
Oracle RAC and Data Guard directory and structure I have keeped same.
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$ ./rman target sys/HPinvent123nbl@dcpdb AUXILIARY sys/HPinvent123nbl@drpdb
Recovery Manager: Release 11.2.0.1.0 - Production on Wed Jan 16 16:28:32 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
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Starting Duplicate Db at 16-JAN-13
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channel ORA_AUX_DISK_1: SID=5644 device type=DISK
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backup as copy reuse
targetfile '/u02/app/oracle/product/11.2.0/dbhome_1/dbs/orapwdcpdb1' auxiliary format
'/u02/app/oracle/product/11.2.0/dbhome_1/dbs/orapwdrpdb' ;
executing Memory Script
Starting backup at 16-JAN-13
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1897 instance=dcpdb1 device type=DISK
Finished backup at 16-JAN-13
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
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RMAN>
Please help.\
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root@drpdb1 []# id oracle
uid=108(oracle) gid=700(oinstall) groups=701(dba)
root@drpdb1 []# id grid
uid=109(grid) gid=700(oinstall) groups=701(dba),702(asmdba)
Edited by: 876149 on Jan 16, 2013 3:19 AM

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
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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

Looking for Active Data Guard in Oracle 11g Release 2 References

I want to reach out to customers who have implemented Active Data Guard in production (preferably 11.2), so that we can develop some
customer references that in turn will benefit other customers. The customers who get selected for such references may further be selected to publish their case study directly in oracle.com and/or invited as a customer co-speaker in the upcoming Oracle OpenWorld at San Francisco (Sep 19-23, 2010). Being a customer co-speaker at OOW means they get a free pass to the full conference (regular price for that is $1795-$2495).
Please send any follow-ups to [email protected]
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Oracle Data Guard & MAA Product Manager

Hi Larry,
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Oracle 11g Active Data Guard and SAP R3

Hi All,
I have a query regarding Oracle 11g Active Data Guard and SAP R3.
Does the Oracle 11g R1/R2 Active Data guard feature supported with SAP R3?
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Oracle 11g Active Data Guard help ?

Hi Friends,
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Regards
Vish

It is not so simple to direct reports to the Physical Standby as you seem to assume.
You need to do some work for the setup.
See here for a description:
http://uhesse.com/downloads/real-time-query-presentation/
Kind regards
Uwe Hesse
Don't believe it, test it!"
http://uhesse.com

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?

How to configure Enterprise Manager in Active Data Guard?

Hi,
I have installed oracle 11g r2 rac with asm in two nodes. OS is hp-Unix.
I have installed oracle11g Active Data Guard using Single alone Database.
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I have not configure Data Guard Broker.
Question: How to configure Enterprise Manager in Active Data Guard?
Thanks
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http://www.gokhanatil.com/2012/04/manage-your-existing-data-guards-with.html

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
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Thanks in advance,

Hi,
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You said
The application tables don't all have primary keys.
so you have to add keycols on replicat side.
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Best Regards

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

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