Dataguard broker

Hi ,
I have confusion about standby database in oracle 10g ,bcoz dataguard and physical standby database is same or not ?
if same what is Dataguard Broker in standby?
what is the difference between enable dg_broker_start = true and false / also what is the nature of job?
Regards,
S.Mugunthan

I have confusion about standby database in oracle 10g ,bcoz dataguard and physical standby database is same or not ?Data Guard is again priced product & Standby Database is a standard feature. You only may need another database license for the instance.
But you have to do all your own scripting to move archived redo logs to the standby to be applied, including any error checking.
Dataguard is the process to mirroring your Production/primary database. Dataguard manage your database primary and your database standby.
Even you can perform Switchovers & also failovers.
With Data Guard Oracle provides all that as part of the package, plus some management tools. The core still remains a Standby Database, either physical or logical.
if same what is Dataguard Broker in standby? You can say Datagaurd broker instead of standby broker, Broker will be enabled when it is configured in both primary & also standby database.
is again a utility where you can manage all Monitoring, Drilling (switching/faliver) via DGMGRL
In detail for this utility please do refer http://docs.oracle.com/cd/B28359_01/server.111/b28295/concepts.htm
what is the difference between enable dg_broker_start = true and false / also what is the nature of job?DG_BROKER_START enables Oracle to determine whether or not the Data Guard broker (DMON) process should be started. DMON is a non-fatal Oracle background process and exists as long as the instance exists, whenever this parameter is set to true.
In detail refer http://docs.oracle.com/cd/B19306_01/server.102/b14237/initparams060.htm
HTH.

Similar Messages

How to Configure Oracle Management Server (OMS) with Dataguard Broker

Dear Experts,
i have a production DB (192.168.200.9) 9.2.0.1.0 on Server 2003
i have a standby DB (192.168.200.19) 9.2.0.1.0 on Server 2003
Archive logs are shipped to standby database and applied there. *(Datagauard is configured).*
Now i want that Graphically i want to see that archivelogs are shipping to standby database and applied there ( i want to configure Dataguard Broker in graphical mode (*dataguard manager*) isnt it ( bcz i anm bit confused with this).............?
*1.* For this purpose to achieve i take some seperate machine install on it Server 2003.
*2.* and then Install oracle db 9.2.0.1.0 ( here i will install FULL DATABASE, CUSTOM installation ( then createsome repository).
*3*. can i configure this repository for OMS on my already running production or standby DB............?
*4.* After this OMS is configured or not..........?
*5.* how i will configure datagauard broker
what i know regarding this is on primary and standby db *( DG_BROKER_START = TRUE)* and after
this we have to create some configuration wizards but how
i think i have to go with this sequence if somebody has different sequence tellm e
wait for replies
thanks in advance
regards rehan
faisalabad pakistan

Does anybody dont know anything about this.................?

Help Required to impliemnt the DataGuard Broker in 11.1.0.7

Hi,
We have standby setup in system with physical standby database.
We need to impliment the dataguard broker .Our database version is 11.1.0.7.
regards,

Hi,
Please refer to:
Oracle® Data Guard Broker 11g Release 1 (11.1)
http://download.oracle.com/docs/cd/B28359_01/server.111/b28295/toc.htm
Oracle® Data Guard Concepts and Administration 11g Release 1 (11.1)
http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/toc.htm
Regards,
Hussein

Dataguard-Dataguard broker

Hi,
For Dataguard to do automated recovery is dataguard broker is needed?
I have DGbroker disabled but still mrp is going on.
SQL> select OPEN_MODE,DATABASE_ROLE,DATAGUARD_BROKER,GUARD_STATUS from v$database ;
OPEN_MODE DATABASE_ROLE DATAGUAR GUARD_S
MOUNTED PHYSICAL STANDBY DISABLED NONE
SQL> select PROCESS,STATUS,DELAY_MINS from v$MANAGED_STANDBY;
PROCESS STATUS DELAY_MINS
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
ARCH CONNECTED 0
MRP0 WAIT_FOR_LOG 0
RFS RECEIVING 0
RFS ATTACHED 0
RFS ATTACHED 0
RFS RECEIVING 0
Can you please help in understanding this?
Edited by: 873341 on Jul 21, 2011 4:10 PM

If the DG Broker is not enabled then the switch over doesnot occures.You have to perform switchover manually.
One more question.
IS the DR and DG are same.
I head that in DR recovery of archive logs doesnot occures automatically .We need to manually push .IS it true?If it is ENTERPRISE Edition, then no need to copy archives manually, If you configured properly everything is automated.
DR - disaster recovery, How can you plan to recover from lost of database and what are the methods.
DG - Dataguard (method)

Database upgrade in Dataguard Broker Environment

Hi All,
OS: Wndows 32 bit
DB: 11.2.0.1
We have an upgrade activity due, in this, we have a windows Primary Database and it has 2 Physical Standby databases. There is no concept of Near DR and Far DR. Both the databases are getting sync'd directly from the Primary database.We are also using Dataguard Broker. Following is the skeletol POA for the same:
1. Install an out of place DATABASE Software (11.2.0.3 ) on both the Standby databases and also the Primary database.
2.Disable the configuration of the database broker on all the 3 servers
3.Copy the files init/spfile, tnsnames.ora, listener.ora, sqlnet.ora and the password file from the old oracle home to the new oracle home location on all the 3 servers.
4.Take a clean shutdown of the Standby databases only and then stop the services and delete the services as well.
5.Get into the new oracle home and create the oracle services for both the standby databases
6.Once, the services are created, mount both the standby databases and enable their recovery.
7. Now, we will connect to the Priamry database server and start the upgrade here. I will be using the manuall method of upgrade for the database here which all includes all the pre and post tasks.
8. Once the upgrade is done succesfully on the primary databases, the changes will be automatically replicated on its 2 Standby databases as well.
9. Post this, we will enable the broker configuration and check for the syncronziation by doing some switch's.
10. Lastly we will remove the old oracle home's.
Any suggestions?
Regards,
SPhinx

After the upgrade the home directory will change and all I need to do is change the home directory path in the extract/replicate prm file correct ?
this what I will do :
1. stop GG services on both source and target
2. upgrade the db.
3. change the path of the db in the prm files as required.
4. start the extract and replicate process on source and target respectively.

DataGuard Broker in 11gR2 - StaticConnectIdentifier

Ok, I have read that in 11gR2 you no longer have the requirement of putting in a static entry in your listener.ora file with <SID>_DGMGRL if you use the Dataguard Broker parameter: StaticConnectIdentifier. I have used this new parameter and it was set up automatically to be:
StaticConnectIdentifier = '(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=DB1)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=prod_sb_DGMGRL)(INSTANCE_NAME=prod_sb)(SERVER=DEDICATED)))'
My question is that there is no entry anywhere that specifies the SERVICE_NAME as prod_sb_DGMGRL. Will my switchover work without that SERVICE_NAME being defined no where? Am I missing a step? Thanks folks.

Hello;
I'm thinking the switchover will fail with an ORA-12514. Without the listener.ora entry DGMGRL will not be able to connect to the databases after they have been stopped.
So you still need the _DGMGRL or at least a static entry in the listener.ora. In any event the static entry will not cause an issue.
*Switchover Failed With ORA-12521 using Dataguard Broker [ID 1380949.1]*
For additional information see - 8.3.40 StaticConnectIdentifier in "Data Guard Broker 11g Release 2 (11.2) E17023-04"
"A connect identifier that refers to a service that is statically registered"
Best Regards
mseberg
Edited by: mseberg on Sep 20, 2012 4:04 AM

Dataguard Broker - Swithover failed

I have a two node RAC(n1,n2) with one physical standby(n3)
I have enabled dataguard broker and did a swithover with one instance up in RAC(n1 up)
Swithover and switchback have worked fine.
But when trying to do a swithover from the second RAC(n2 up) node it failed and now all the db's are in standby mode.
When tyring to bring up the RAC instances, alert log shows as standby instances.
Physical Standby Database mounted.
Completed: ALTER DATABASE MOUNT
ALTER DATABASE OPEN
From sql:
SQL> select switchover_status from v$database;
SWITCHOVER_STATUS
SESSIONS ACTIVE
On standby:
SQL> select switchover_status from v$database;
SWITCHOVER_STATUS
TO PRIMARY
Has anyone come accross this situation? How to bring it back to the Primary instance mode?

On-Standby
1. alter database commit to switchover to physical standby with session shutdown;
2. shutdown immediate;
3. startup nomount;
4. alter database mount standby database;
5. alter system set log_archive_dest_state_2=defer;
6. recover managed standby database disconnect;
On-Primary
1. alter database commit to switchover to primary;
2. alter system set log_archive_dest_stat_2=enable;
3. shutdown immediate;
4. startup;

Dataguard broker setup - Licensing terms

Hi,
This is a simple question. I have searched Oracle documentation fairly elaborately, but could not find an answer.
The question is: Can I co-host Dataguard Broker configuration with RMAN Catalog+EMGC ?
We already have one host (Running EE) catering to RMAN Catalog and EMGC repository (On a single server). Since we have a requirement of configuring dataguard broker, the thought was to co-host this on the same server.
Is there a licensing consideration to this? Can someone refer some relevant documentation please? Thanks in advance.
Cheers,
-Ganesh

Is there a licensing consideration to this? Can someone refer some relevant documentation please? Thanks in advance.
Standby is an copy of the primary database is maintained on a separate server at all times. the standby database is activated to act as the new primary database.
"In this environment, both the primary and the standby databases must be fully licensed."
Oracle standby servers need to be fully licensed if they are “hot standby” servers that can be used for production SQL queries. Some sources say that cold standby servers used less than 10 days per year do not need to be licensed, but you should verify this with your Oracle representative or the Oracle Store. In sum, current 2006 Oracle Data Guard licensing policies suggest that if Data Guard is installed for "standby" purposes, it requires full licensing.
Check this discussion, it may help you.
http://www.oracle.com/us/corporate/pricing/price-lists/index.html
http://www.oracle.com/us/corporate/pricing/technology-price-list-070617.pdf
license required for Data GUARD ??
http://www.orafaq.com/forum/t/52173/0/

Creaton of Standby database and dataguard broker

Hi Experts,
I am using Linux with Oracle version 11gR2. We have planned to create a physical standby database and also configure dataguard broker for the standby database.
Also, I've read the documents that active dataguard is a feature on 11g. Is it not possible on 10g ?
Can someone please provide me the steps to create the standby database and configure the dataguard broker.

Hello;
A simple Data Broker setup would be :
On both Primary and Standby sites, change the initialization parameter in the spfile to enable the Data guard broker.
SQL> Alter system set dg_broker_start=True scope=both;
On the PRIMARY site, open the ‘cmd’ and start Command Line Interface (CLI) of the Dataguard Broker (DGMGRL).
/home/oracle:PRIMARY >dgmgrl
DGMGRL for Linux: Version 11.2.0.1.0 - 64bit Production
DGMGRL> connect sys/password@PRIMARY
Create broker configuration.
DGMGRL> create configuration ‘broker1’ as
primary database is 'PRIMARY'
connect identifier is primary;Configuration "?broker1?" created with primary database "PRIMARY"
DGMGRL>
(‘primary’ in Connect identifier is the service name through which the broker is connected to the PRIMARY database)
Add Standby Database to the above configuration.
DGMGRL> add database 'standby' as
connect identifier is 'STANDBY'
maintained as physical;
Database "standby" added
(‘to_standby’ in Connect identifier is the service name through which the broker is connected to the STANDBY database)
Now the configuration has been set up but it is still disabled. You can view the configuration by executing:
DGMGRL> show configuration
The next step is to ENABLE the configuration ‘broker1’.
DGMGRL> enable configuration;
Enabled.
Again view the configuration.
DGMGRL> show configuration
Configuration - ?broker1?
Protection Mode: MaxPerformance
Databases:
PRIMARY - Primary database
standby - Physical standby database
Fast-Start Failover: DISABLED
Configuration Status:
SUCCESSIn my humble opinion its a good idea to setup Data Guard without Broker and get the "feel" of it first.
Remember, once you setup Broker, you cannot use SQL to change your Data Guard setup.
Best Regards
mseberg

Advantage & Disadvantage of using Dataguard Broker

Please advise on the benefits of using Dataguard Broker.
And the disadvantages.

Actually I would say that the first time you create a standby, and the first time you run a switchover it would be good to do it with sqlplus, and tail the alert log, so you understand the parameters and how switchover works.
After you have successfully done a few switchovers manually, then move to Dataguard Broker and you will appreciate how much easier it is, how many errors it fixes, as well as understanding exactly what it is doing, and how you can fix a problem in case Dataguard Broker fails.

Will Oracle9i Dataguard broker work with Oracle10g Grid control ?

Hello all,
I have recently configured Oracle9i dataguard using Dataguard broker and it's currently working fine but I am not sure if this could be managed with Oracle10g Grid control as it does for Oracle10g dataguard (i.e. Switch-over, Protection mode switching and so on ..)
I would appreciate if anyone could enlighten me further on this as I have not been able to find any proper document to provide me with the appropriate answer .
Thanks..

Ram,
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JBCL 2.0 WILL be included in the production release of JDeveloper
2.0, but will not be visible on the palette by default. You can
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For more info on this decision and why we are recommending Swing,
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null

Dataguard broker Warning: ORA-16610

Hi
Oracle 10g.
I just configured dataguard broker and followed all the steps in:
http://apunhiran.blogspot.com/2009/09/how-to-configure-data-guard-broker.html
However, I am constantly getting ORA-16610.
any idea, how to resolve this ?
DGMGRL> SHOW CONFIGURATION
Configuration
Name: CatalogDR
Enabled: YES
Protection Mode: MaxPerformance
Fast-Start Failover: DISABLED
Databases:
orclprd_wlg - Primary database
orclprd_akl - Physical standby database
Current status for "CatalogDR":
Warning: ORA-16610: command 'Broker automatic health check' in progress

Ah broker!
My friend calls it "data broken"
I have my setup notes I can post if you want. I had it working and I like its speed, but I found it to be a pain and went back to SQL for all my commands.
My offer to post my broker setup notes stands
mseberg
Later
John;
I checked my setup note and here's what i have on your current error :
ORA-16607 on SHOW CONFIGURATION
Problem: After creating your configuration and adding the standby database, you issued a SHOW CONFIGURATION as suggested. Instead of the expected SUCCESS, the report ends up with
Warning: ORA-16607: one or more databases have failed
. Checking with oerr ora 16607 was not very helpful (see above), and you neither can find anything in your alert.log nor any trace files.
Cause: Probably at least one of your databases is not using an SPFILE.
Solution: Check whether your databases have an SPFILE associated. It is usually located in $ORACLE_HOME/dbs/spfile$ORACLE_SID.ora. If it does not exist, create it: Login to your database as SYSDBA, and issue the command CREATE SPFILE FROM PFILE;. Even if it exists, to make the database using it you need to restart the instance - it must be used already at startup.Edited by: mseberg on Aug 11, 2011 8:12 PM

How to recreate Dataguard broker config files?

Hi,
It seems that we have lost our Dataguard Broker Config files in the standby database due to rsync of ORACLE_HOME files from Primary to Standby database. Any idea on how we can recreate them? I tried to restart the dg_broker process (alter system dg_broker_start = false, then = true) but the files are still not there. Can I copy the dg_broker_config_files from Primary to Standby database?
I think this may also be the reason why any DG Broker commands we issue are hanging (both from dgmgrl and OEM).
Appreciate any help as I can't find anything like this on Metalink.
Thanks,
Abigail

I have a 10.4 user without the hidden .ssh directory and all the usual files within that directory (id_rsa, id_rsa.pub, known_hosts) due to a munged account, and am now wanting to know to recreate those files so I can SSH back to this machine.
ssh-keygen -t rsa
will create the .ssh directory and the rsa files. known_hosts will be created as the account is used to ssh/scp/sftp into other accounts.
If other systems are to be allowed to login to this account, then copy their id_rsa.pub files and append them to .ssh/authorized_keys. That will allow them access to this account.
And if this account is suppose to be able to login to other systems, append the newly created id_rsa.pub file to the other system account's .ssh/authorized_keys file.
Check *man ssh* to make sure all permissions are set correctly. If some of the files and/or directories are too permissive, ssh will not work correctly, as it will assume your account can be compromised.

Dataguard Broker and EBS

Hi,
We've configured dataguard on our system and have been performing manual switchovers (via SQL) smoothly. We would now like to configure Broker for this purpose- via the dgmgrl command line since we don't have 10G Grid. While we're finding immense documentation on how to do so on the 10g database, we're unable to find anything with regards to EBS. Basically we want confirmation that the configuration for EBS is the same as for the database alone, since based on past experience we know that the EBS factor can make things a little different.
If anyone has implemented Broker on EBS please let me know. Btw, we're currently on EBS 11.5.10.2 and DB 10.2.0.4. Thanks.
Lia.

We've configured dataguard on our system and have been performing manual switchovers (via SQL) smoothly. We would now like to configure Broker for this purpose- via the dgmgrl command line since we don't have 10G Grid. While we're finding immense documentation on how to do so on the 10g database, we're unable to find anything with regards to EBS. Basically we want confirmation that the configuration for EBS is the same as for the database alone, since based on past experience we know that the EBS factor can make things a little different.It is the same.
If anyone has implemented Broker on EBS please let me know. Btw, we're currently on EBS 11.5.10.2 and DB 10.2.0.4.Refer to "Oracle® Data Guard Broker 10g Release 2 (10.2)" manual.
Oracle® Data Guard Broker 10g Release 2 (10.2)
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14230/toc.htm

Errors setting up DataGuard Broker

Hi,
I'm setting up Data Guard Broker and get these errors, hope you can help.
My Primary (orcl) is in open state and Standby (orcldg) is in open read only state.
I've run these on both of my 2 node primary RAC
dgmgrl
connect sys
create configuration dg_tst as primary database is orcl connect identifier is orcl;
add database orcldg as connect identifier is orcldg maintained as physical;
exit;Then
enable configuration;and now get following errors:
DGMGRL> show database orcl;
Database
Name:            orcl
Role:            PRIMARY
Enabled:         YES
Intended State: ONLINE
Instance(s):
    orcl1
Current status for "orcl":
Error: ORA-16810: multiple errors or warnings detected for the database
DGMGRL> show database orcl statusreport;
STATUS REPORT
       INSTANCE_NAME   SEVERITY ERROR_TEXT
               orcl1      ERROR ORA-16736: unable to find the destination entry of standby database "orcldg" in V$ARCHIVE_DEST
               orcl1    WARNING ORA-16714: the value of property ArchiveLagTarget is inconsistent with the database setting
               orcl1    WARNING ORA-16714: the value of property LogArchiveTrace is inconsistent with the database setting
               orcl1    WARNING ORA-16714: the value of property LogArchiveFormat is inconsistent with the database setting
               orcl2      ERROR ORA-16532: Data Guard broker configuration does not exist
DGMGRL> show database orcl LogXptStatus;
Error: ORA-16777: unable to find the destination entry of a standby database in V$ARCHIVE_DEST
DGMGRL>

Hi,
I think main issue is due to the location of broker configuration files is not set the same common location in the primary.
Note: in case of RAC, you must have broker configuration files on the shared location and setting DG_BROKER_CONFIG_FILE1 and DG_BROKER_CONFIG_FILE2 to same values in all nodes.
Refer:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14230/configure.htm#i1021661
Action Plan
=====
++ Disable broker on primary and standby
++ Drop exisiting broker configuration files on primary and standby
++ Set the value of DG_BROKER_CONFIG_FILE1 and DG_BROKER_CONFIG_FILE2 correctly in primary and standby
++ Enable broker in primary and standby
++ Create broker configuration again
++ Add standby in configuration
++ Enable configuration
Regards
Anudeep

Dataguard broker

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