Active Dataguard switchover puts new standby in real time query

Hi Gurus,
If using Active Dataguard ,after swicthover/failover using dg broker and observer does sthe new standby will be put in real time query mode(ADG) or manually have to open the db in read only mode.
Please let me know.
Thanks

Yes it does:
[uhesse]$ dgmgrl sys/oracle@prima
DGMGRL for Linux: Version 11.2.0.1.0 - Production
Copyright (c) 2000, 2009, Oracle. All rights reserved.
Welcome to DGMGRL, type "help" for information.
Connected.
DGMGRL> show configuration
Configuration - myconf
Protection Mode: MaxAvailability
Databases:
    prima - Primary database
    logst - Logical standby database
    physt - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
DGMGRL> show database physt
Database - physt
Role:            PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag:   0 seconds
Apply Lag:       0 seconds
Real Time Query: ON
Instance(s):
    physt
Database Status:
SUCCESS
DGMGRL> switchover to physt;
Performing switchover NOW, please wait...
New primary database "physt" is opening...
Operation requires shutdown of instance "prima" on database "prima"
Shutting down instance "prima"...
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
Operation requires startup of instance "prima" on database "prima"
Starting instance "prima"...
ORACLE instance started.
Database mounted.
Database opened.
Switchover succeeded, new primary is "physt"
DGMGRL> show configuration
Configuration - myconf
Protection Mode: MaxAvailability
Databases:
    physt - Primary database
    prima - Physical standby database
    logst - Logical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESS
DGMGRL> show database prima
Database - prima
Role:            PHYSICAL STANDBY
Intended State: APPLY-ON
Transport Lag:   0 seconds
Apply Lag:       0 seconds
Real Time Query: ON
Instance(s):
    prima
Database Status:
SUCCESSKind regards
Uwe Hesse
http://uhesse.wordpress.com

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Password:
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While googling I've come across the following variant with an additonal 'WITH SESSION SHUTDOWN' clause
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Question on 'WITH SESSION SHUTDOWN' clause
While googling I've come across the following variant with an additonal 'WITH SESSION SHUTDOWN' clause
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Dear user7419391,
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http://www.ascent.co.za/documents/oracle/Oracle%20databse%2011g%20Active-Data-Guard%20datasheet.pdf
*Unique Advantages of Oracle Active Data Guard*
+Active Data Guard is an evolution of Data Guard technology, providing unique+
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+and is ideally suited as a test system, able to process transactions independent of the+
+primary database. A Snapshot Standby maintains protection by continuing to receive+
+data from the production database, archiving it for later use. When tests are+
+complete, a single command discards changes made while open read-write and+
+quickly resynchronizes the standby database with the primary.+
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Regards.
Ogan

Choosing protection mode for Active dataguard

Hi Gurus,
I'm confused with Active dataguard configuration-What mode do i need to configure physical standby to make use of actice dataguard.I know i can even use maximum performance with standby redolog for real time query.But what is the minimum protection mode to run active dataguard.
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You said:
>
By default Dataguard is in Maximum performance mode..we can set delay of 1 hour by setting the
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or
log_archive_dest_2="service=to_standby lgwr async delay=60"
>
I am sorry, but your first log_archive_dest_2 value is not correct:
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http://download.oracle.com/docs/cd/E11882_01/server.112/e17110/initparams121.htm
Kind regards
Uwe Hesse
http://uhesse.wordpress.com

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Hello;
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Hi,
Does Active Data Guard switch over need downtime?
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Cheers

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Let me also mention that we have an OTN Data Guard forum for these kind of questions:
Data Guard
Kind regards
Uwe Hesse
http://uhesse.wordpress.com

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I am new to CVI real time and need help related to this. I will explain my scenario:
1. I have few configuration files (INI). Need to validate the files (range checking..etc) during start of the application.
2. When user clicks "START" in the user interface on the host machine, I need to generate outputs (analogs/discretes...) based on the settings in the config file and read some inputs from other instruments. ( I/O tasks like generating outputs/reading inputs i am planning to perform in RT side)
3. From the user interface, user can also change the config files. if user changes the files, again file validation needs to be performed. After changing the files, if user clicks START, need to take the newly enetered config files to perfom I/O tasks.
4. I am NOT using reflective memory for my application.
I am confused in the following area:
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Solved!
Go to Solution.

Hey haari,
1. File validation during startup , do I have to perform on both host and RT side?????
This depends on the full range of responsibility for the INI files. If they are all needed simply to change what the I/O tasks are for, then you would technically only need to validate the INI file contents on the RT side. You could, however, validate on both sides if you wanted to. However, I would probably set it up such that I send a validation command to the target, have the target run a component of the code that validates the INI contents based on how I instructed it, and then return a message that says whether or not it met the requirements I specified. However, if you are concerned with offloading that process to the user desktop (instead weighing down the RT controller performance), you could FTP the file off of the controller and perform the validation process on the host side.
2. if configuration files are changed in the host side by the user, how i have to send this latest file names to RT??? I think i should not send file names, i need to read from the file and its contents i need to pass to RT....Pls correct me , I am not sure about this....
You can send them to the target over FTP. This can be done programmatically, through MAX, command window, or a Web browser.
3. If I have to send file contents to the RT, how I have to do that....means i have to use structures,..???
This is basically addressed in answer to question two. You would not need another structure in your RT code to handle the FTP receive component as this is handled by the FTP Client/Server communication. However, in the event that you successfully FTP a file to the target, you should likely send a message from the host to the target so that the target can respond accordingly and reload the file, reestablish the I/O values, run an idle procedure, or do whatever you like.
Hope this helps. Have a great day!
Tim A.
National Instruments

Active Dataguard switchover puts new standby in real time query

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