Question on db_unique_name in init.ora for Data Guard

I need to set up only one physical standby on a different box (at a different location) for the primary db in production.
OS: Sun Sparc Solaris 10
Oracle: 10.2.0.3
Can I use the same db_unique_name in init.ora for both primary and standby DBs?
What are the minimal parameters required by Data Guard I have to specify in the init.ora in my case?
Could anyone please post an example of init.ora for both primary and standby DBs?
Thanks very much in advance.

http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/create_ps.htm#i63561

Similar Messages

Separate listener for Data Guard

I am setting up a best practice about using a dedicated listener for Data Guard. The idea is to maintain full functionality of Data Guard while application team is requesting to bring down listener service (according to business requirement). Need your opinion on these:
1. I understand that there may be a very little chance when listener is required by Data Guard, but I find it no harm to do this. Do you agree with me?
2. In RAC environment, we can only have 1 VIP to be used in listener.ora. I am thinking of using same IP but different port numbers for different listener. Any better idea than this?
Many thanks

It is never a bad practice to use separate listeners at the primary and at the Standby for Data Guard's use. A listener at the standby is required by Data Guard to make a connection to that standby. A listener at the Primary is required for Data Guard to make a reverse connection from the Standby to the Primary for some kinds of Gap resolution (missing log file the the Primary thinks it already sent or a corrupted log file etc). And of course, when you switch roles.
To answer the second question could you please tell me what version of Oracle you are using and if you plan on using the Data Guard Broker or not?
Thanks.
Larry

Error: ORA-16532: Data Guard broker configuration does not exist

Hi there folks. Hope everyone is having a nice weekend.
Anyways, we have a 10.2.0.4 rac primary and a 10.2.0.4 standby physical standby. We recently did a switchover and the dgbroker files automatically got created in the Oracle_home/dbs location of the primary. Now need to move these files to the common ASM DG. For this, I followd the steps from this doc:
How To Move Dataguard Broker Configuration File On ASM Filesystem (Doc ID 839794.1)
The only exception to this case is that I have to do this on a Primary and not a standby so I am disabling and enabling the Primary(and not standby as mentioned in below steps)
To rename the broker configuration files in STANDBY to FRA/MYSTD/broker1.dat and FRA/MYSTD/broker2.dat, Follow the below steps
1. Disable the standby database from within the broker configuration
DGMGRL> disable database MYSTD;
2. Stop the broker on the standby
SQL> alter system set dg_broker_start = FALSE;
3. Set the dg_broker_config_file1 & 2 parameters on the standby to the appropriate location required.
SQL> alter system set dg_broker_config_file1 = '+FRA/MYSTD/broker1.dat';
SQL> alter system set dg_broker_config_file2 = '+FRA/MYSTD/broker2.dat'
4. Restart the broker on the standby
SQL> alter system set dg_broker_start = TRUE
5. From the primary, enable the standby
DGMGRL> enable database MYSTD;
6. Broker configuration files will be created in the new ASM location.
I did so but when I try to enable the Primary back I get this:
Error: ORA-16532: Data Guard broker configuration does not exist
Configuration details cannot be determined by DGMGRL
Form this link,(Errors setting up DataGuard Broker it would seem that I would need to recreate the configuration....Is that correct ? If yes then how come Metalink is missing this info of recreating the configuration... OR is it that that scenario wouldnt be applicable in my case ?
Thanks for your help.

Yes I can confirm from the gv$spparameter view that the changes are effective for all 3 instances. From the alert log the alter system didnt throw u pany errros. I didnt restart the instances though since I dont have the approvals yet. But I dont think thats required.

Database is configured for Data Guard

I am run a UTF8 conversion on a development database that has been cloned from Data Guard. There is a warning in Migration Status: "Database is configured for Data Guard" What is the DMU looking at to determine this? The database is open in read-write mode and it behaving like a primary database (I run the DMU scan and run updates to fix invalid representations). I would like to know what settings I need to update.
Is this preventing me from converting tables using CTAS? When I try to select this for all tables I get the message, "The DMU does not support the conversion method "Copy data using CREATE TABLE AS SELECT" for tables that are involved in an Oracle Streams process, like capture or apply. Use another available conversion method for the table"
Thanks,
Ben

The DMU checks if the parameter DG_BROKER_START is set to true.
The problem with CTAS is independent from Data Guard. The DMU checks for tables that:
- are source of asynchronous Streams capture, or
- have update conflict handlers, or
- have DML handlers, or
- have conflict resolution parameters
The above tables are considered configured for Oracle Streams and are not supported by CTAS conversion method. This is because the CTAS method creates a converted copy of the table and drops the original. The DMU is not capable of moving the Streams configuration information from the old table to the new one.
Thanks,
Sergiusz

Parameters in Init.ora for Materialized Views

Fellow Experts,
Are there any other parameters that I need to insert in the init.ora besides QUERY_REWRITE_ENABLED
and
QUERY_REWRITE_INTEGRITY
once I create a materialize view ?
Thanks.
Ray.

Oracle version 10.0.2 and the DDL that I'm planning to use might be simmilar to
CREATE MATERIALIZED VIEW sales_by_month_by_state
TABLESPACE example
PARALLEL 4
BUILD IMMEDIATE
REFRESH COMPLETE
ENABLE QUERY REWRITE
AS SELECT t.calendar_month_desc, c.cust_state_province,
SUM(s.amount_sold) AS sum_sales
FROM times t, sales s, customers c
WHERE s.time_id = t.time_id AND s.cust_id = c.cust_id
GROUP BY t.calendar_month_desc, c.cust_state_province;

Steps for Data Guard with one primary and 2 standby

Hi,
Database :10.2.0.4, 11.2.0.1
Os: Windows , Unix
A ----------------> Primary database
B ----------------> Standby Database 1
C ----------------> Standby Database 2
I want to configure *2 standby* databases for single primary database.
Lets take, A ,B and C are my machines.My data guard configuration will be like,*archive logs will be moving* from A to B and A to C.
If i do any switchover in between A and B , now B is primary and remaining A and C are standby databases.At this stage also , archive logs should move from B to A and B to C. Also, same should happen from C to A and C to B,If i do switchover in between B and C.If everything is fine , then i will do switchback to main Primary database(A).
How do i have to mention PFILE in all machines ,the parameters like
LOG_ARCHIVE_DEST_1=LOCATION=<PATH> -- LOCAL ARCHIVE PATH
LOG_ARCHIVE_DEST_2=SERVICE=
LOG_ARCHIVE_DEST_3=SERVICE=
FAL_SERVER=
FAL_CLIENT=
STANDBY_FILE_MANAGEMENT=
In my tnsnames.ora , primary,standby1 and standby2 are my service entries and these are same in all of my machines.
Please suggest me , how do i can configure my pfiles in all machines ?.
Thanks,
Sunand

Not yet, but now you have me interested.
Please consider Flashback.
I still have to test but here's my take:
PRIMARY SETTINGS
*.FAL_SERVER=STANDBY
*.FAL_CLIENT=PRIMARY
*.STANDBY_FILE_MANAGEMENT=AUTO
*.DB_UNIQUE_NAME=PRIMARY
*.LOG_FILE_NAME_CONVERT='STANDBY','PRIMARY'
*.log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=PRIMARY'
*.log_archive_dest_2='SERVICE=STANDBY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY'
*.log_archive_dest_3='SERVICE=STANDBY2 LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY2'
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=ENABLE
*.LOG_ARCHIVE_DEST_STATE_3=ENABLE
*.LOG_ARCHIVE_MAX_PROCESSES=30
STANDBY 1 SETTINGS
*.FAL_SERVER=PRIMARY
*.FAL_CLIENT=STANDBY
*.STANDBY_FILE_MANAGEMENT=AUTO
*.DB_UNIQUE_NAME=STANDBY
*.LOG_FILE_NAME_CONVERT='PRIMARY','STANDBY'
*.log_archive_dest_1=LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=STANDBY'
*.log_archive_dest_2='SERVICE=PRIMARY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=PRIMARY'
*.log_archive_dest_3='SERVICE=STANDBY2 LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY2'
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=DEFER
*.LOG_ARCHIVE_DEST_STATE_3=DEFER
*.LOG_ARCHIVE_MAX_PROCESSES=30
STANDBY2 SETTINGS
*.FAL_SERVER=PRIMARY
*.FAL_CLIENT=STANDBY2
*.STANDBY_FILE_MANAGEMENT=AUTO
*.DB_UNIQUE_NAME=STANDBY2
*.LOG_FILE_NAME_CONVERT='PRIMARY','STANDBY2'
*.log_archive_dest_1=LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=STANDBY2'
*.log_archive_dest_2='SERVICE=STANDBY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY'
*.log_archive_dest_3='SERVICE=PRIMARY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=PRIMARY'
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=DEFER
*.LOG_ARCHIVE_DEST_STATE_3=DEFER
*.LOG_ARCHIVE_MAX_PROCESSES=30
Edited by: mseberg on Nov 29, 2010 9:39 AM
The first test slapped me. Looking at 409013.1 Cascaded Standby Databases
Edited by: mseberg on Nov 29, 2010 12:49 PM

Steps for data guard RAC primary RAC standby

Hi,
I have some doubt in configuring data guard for rac DR to rac primary.
1) In RAC DR, physical standby will be in RAC before starting data guard for RAC Primary , right?.
2) While configuring RAC DR , should one node be down in standby?.
3) After creating the auxiliary database in standby, i mean restoring the rman backup from staging directory in DR,
Shall we have to register the services(database,instance,asm,etc..) to CRS(OCR)?. If yes ,Why?.
4) After DR configure over , Shall i shut/down one node?. Should all the nodes in DR be in up , while applying logs to
standby ?.
If anybody have made the setup and have the prepared document , requesting you to share with me.
Thank you very much,
Sunand

Hi Sunand,
Please follow the following My Oracle Support (MOS) Document ID:
MAA - Creating a RAC Physical Standby for a RAC Primary [ID 380449.1]
For further details, see the referred documents in previous post. Try practicing on VMWare because it will give you the flexibility for creating snapshots to save your work. Please see the answers for your question below:
Q1. In RAC DR, physical standby will be in RAC before starting data guard for RAC Primary , right?.
Answer: Yes, this is recommend but not mandatory. You can add a second node later on.
Q2. While configuring RAC DR , should one node be down in standby?
Answer: Yes, there are some database configuration commands that should be run in exclusive mode. You can start the remaining instance(s) after DB creation. Do not forget to set CLUSTER_DATABASE parameter to TRUE. Also, all instances except one should be close while performing switchover/failover.
Q3. After creating the auxiliary database in standby, i mean restoring the rman backup from staging directory in DR, Shall we have to register the services(database,instance,asm,etc..) to CRS(OCR)?. If yes ,Why?
Answer: Yes, this is recommended for RAC configuration to take advantage of high availability services.
Q4. After DR configure over , Shall i shut/down one node?. Should all the nodes in DR be in up , while applying logs to
standby ?
Answer: You can start up all the instances after DR creation. In this case if your one node goes down log apply services will continue to apply changes in DR.
Hope, this helps to clear your questions.
Regards,
Shahid

Configure listener for data guard

HI everyone,
I am currently setting data guard (Physical standby database) for my database. But I have problem to configure the listener on both servers. Can anyone provide me some example?
Oracle: 10g R2
O/S: Windows
Primary database ken10g
standby database: ken10gbk
Following is the content of my current listener files on both of servers:
Primary server:
# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = Primary_server)(PORT = 1521))
Standby Server:
# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = standby_server)(PORT = 1521))
Thanks in advance.
Ken

Hi Ken,
You need to configure this on both primary and standby, I would have kept different listener name on primary and standby. Also if you are going to use dataguard broker you would need to set GLOBAL_DBNAME in your listener.ora file
I have give a sample entry for tnsnames.ora and listener.ora
TNSNAMES.ORA on primary
STNDBY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node2-prv)(PORT = 10521))
(CONNECT_DATA =
(SERVICE_NAME = STNDBY)
PRIM =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node1-prv)(PORT = 10521)))
PRIMARY =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node1-prv)(PORT = 10521))
(CONNECT_DATA =
(SERVICE_NAME = PRIMARY)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
Copy the same file to the standby server and adjust it based on the listener.ora file. Also update the listener.ora file so that it listen the SIDs mentioned in the tnsnames.ora file.
Listener.ora
LISTENER_STBY =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = node2-prv)(PORT = 10521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
SID_LIST_LISTENER_STBY =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = stndby)
(GLOBAL_DBNAME = stndby_DGMGRL)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db10g)
)

Ora-16004(Data guard)

At the time checking with transcation in primary DB,
it is not getting updated even after number of logswitch.
second thing, i tried opening the standby to view the update,
after giving startup i got the following error...
SQL> startup force
ORACLE instance started.
Total System Global Area 289406976 bytes
Fixed Size                  1248576 bytes
Variable Size              92275392 bytes
Database Buffers          188743680 bytes
Redo Buffers                7139328 bytes
Database mounted.
ORA-16004: backup database requires recovery
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: 'D:\ORACLE\PRODUCT\10.2.0\ORADATA\TEST1\SYSTEM01.DBF'

why did you use
startup force ?you can't open the DG using this method.
as you DG database will be in autorecovery mode, your system tablespace is asking for recovery. this is the expected behaviour.
you can open the dataguard in read only mode but not read/write mode. even if you want to open it in the read/write mode using failiover method this is not the way.
you can use following method to open your standby in failover method
+1. Identify and resolve any gaps in the archived redo log files.+
SELECT THREAD#, LOW_SEQUENCE#, HIGH_SEQUENCE# FROM V$ARCHIVE_GAP;
If any file is listed then copy it from primary and register it to the standby.
ALTER DATABASE REGISTER PHYSICAL LOGFILE 'filespec1';
+2. Copy any other missing archived redo log files and register it to standby database.+
SELECT UNIQUE THREAD# AS THREAD, MAX(SEQUENCE#) OVER (PARTITION BY thread#) AS LAST from V$ARCHIVED_LOG;
ALTER DATABASE REGISTER PHYSICAL LOGFILE 'filespec1';
+3. Initiate a failover on the target physical standby database.+
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH FORCE;
+4.Convert the physical standby database to the primary role.+
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
+5. If the standby database has never been opened before in readonly mode then open the database:+
Alter database open;
Or else:
Shutdown immediate;
Startup;
Hope that helps you.
Anil Malkai
Edited by: Anil Malkai on Mar 18, 2010 3:01 AM

Best Practice for monitoring database targets configured for Data Guard

We are in the process of migrating our DB targets to 12c Cloud Control.
In our current 10g environment the Primary Targets are monitored and administered by OEM GC A, and the Standby Targets are monitored by OEM GC B. Originally, I believe this was because of proximity and network speed, and over time it evolved to a Primary/Standby separation. One of the greatest challenges in this configuration is keeping OEM jobs in sync on both sides (in case of switchover/failover).
For our new OEM CC environment we are setting up CC A and CC B. However, I would like to determine if it would be smarter to monitor all DB targets (Primary and Standby) from the same CC console. In other words, monitor and administer DB Primary and Standby from the same OEM CC Console. I am trying to determine the best practice. I am not sure if administering a swichover from Cloud Control from Primary to Standby requires that both targets are monitored in the same environment or not.
I am interested in feedback. I am also interested in finding good reference materials (I have been looking at Oracle documentation and other documents online). Thanks for your input and thoughts. I am deliberately trying to keep this as concise as possible.

OMS is a tool it is not need to monitor your primary and standby what is what I meant by the comment.
The reason you need the same OMS to monitor both the primary and the standby is in the Data Guard administration screen it will show both targets. You also will have the option of doing switch-overs and fail-overs as well as convert the primary or standby. One of the options is also to move all the jobs that are scheduled with primary over to the standby during a switch-over or fail-over.
There is no document that states that you need to have all targets on one OMS but that is the best method for the reason of having OMS. OMS is a tool to have all targets in a central repository. If you start have different OMS server and OMS repository you will need to log into separate OMS to administrator the targets.

Use dedicated server for data guard?

Hi All,
I've heard from someone that it is possible to separate data guard from the database and put it to a server, such that the data guard server will be dedicated to shipping log to standby site db etc. I don't know if such architecture would work. Could anyone please clarify it? Thanks in advance.

An Introduction to Data Guard from Oracle Doc's is here:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/concepts.htm#i1039416

License for Data Guard 11g - Observer

Hi,
I would like to know if fast-failover with Observer requires any additional licensing then just Data Guard.
Thanks in advance.

My first stop would be.... [Oracle 11g Licensing Information|http://download.oracle.com/docs/cd/B28359_01/license.111/b28287/toc.htm|Oracle 11g Licensing Information]. After that I would look at the Data Guard documentation.
HTH!

Force logging for data guard

It is my understanding new to version 11g force logging is not required on the database? So we could setup a tablespace for staging tables in no logging and not generate as much redo to be shipped over to the standby?
Is this true or was that feature added in 10? I have hunted around on OTN for some info on the subject. could anyone provide a link?
Thanks

I've seen nothing that indicates "force logging is not required but the idea that somehow there is an advantage to no logging is grossly overstated.
I'd suggest that you go to http://asktom.oracle.com and read Tom's comments about it.
If your system is so close to falling over that a little bit of logging is going to tip it over you've huge problems you'd best deal with immediately.
Consider, for example, setting up your staging tables as global temporary tables.

DBCONSOLE Problem for Data Guard

Dear All(s)
I am using Oracle 10.2.0 Physical Standby Data Gurad, I have failover successfully. But unable to creating DBConsole serverice. Any one can guide me how i can configure dbconsole (Web OEM).
Thanks in Advance

Naeem,
If you want and afford, you can setup database control on standby after failover in similar manner you did it on primary. Here what you can do to set it up, and fgllow the interactive instruction?
# su - oracle
-- Then set your sid
$> export ORACLE_SID=<sidname>
-- to create
$>emca -config dbcontrol db -repos create
-- to drop old one
$>emca -deconfig dbcontrol dbRegards
OrionNet

Init SID .ora during configuration of Data Guard - advice required

Hi All,
I am looking to implement data guard across 2 RAC clusters. One cluster will be primary and the other is for Disaster Recovery.
I have already set up the two 11g R 2 RAC clusters on RHEL 5 and now need some pointers to good docs for data guard install.
Can some one direct me to good step by step info for configuring data guard between to RAC clusters - detailed explanations of each step would be useful too, in particular around the init.ora file configuration changes between the primary and DR sites
Much appreciated
Steve

Hi Steve,
look at the MAA Whitepapers:
http://www.oracle.com/technetwork/database/features/availability/oracle-database-maa-best-practices-155386.html
There are very good ressources in setting up RAC DG environments like:
Data Guard 11g Installation and Configuration Best Practices on Oracle RAC
Rapid Oracle RAC Standby Deployment: Oracle Database 11g Release 2
Setup Guide: Creating a RAC Logical Standby Database for a RAC Primary Database
Client Failover in Data Guard Configurations for Highly Available Oracle Databases
a.s.o.
Sebastian

Question on db_unique_name in init.ora for Data Guard

Similar Messages

Maybe you are looking for