I am very new to data guard...I have a primary and a physical standby database...If the primary got crashed, are the users directly switched to physical standyby (is it automated) or the DBA has to manually do the fail over or switch over....is it the same concept as in RAC like TAF....How can the DBA know that the users are disconnected from the database.....explain with some steps...
the version is 10.2.0...
In my production -- we have 3 nodes Primary RAC with 2 Nodes Physical secondary Standby RAC. Due to some reason we will have to failover means 3 nodes Primary Standby RAC to 2 Nodes secondary physical Standby RAC. share Steps for Failover ( not switchover) from 3 Nodes Primary RAC to 2 Nodes Physical Standby RAC. I know this is generic and can be find from google but issue is how can failover from 3 nodes primary standby rac to 2 nodes secondary physical standby rac.
View 3 Replies View Related CentOS 6.4 64bits Oracle......: 11.2.0.4 64bits
I am running some small tests here in my test env, using dataguard. I have configured the Primary and Standby with Maximum Availability... they're running just fine. Now i want to execute a failover test (i have already ran a Switchover test with the Broker successfully).
My question is very simple, at my point of view: What are the required steps to execute a successful manual failover? For example, i have my env as follows:
- Primary: prim1
- Standby: stdb1
Suppose that the primary database crashes in an unrecoverable way... is this case a manual failover would be necessary.
To do so, i would have to execute the following command, in my Standby database:
-- stdb1 is the standby database... DGMGRL> failover to stdb1
The above command is correct? Are there any required configurations after the failover? I read the Oracle Docs, and it says
what is the configuration dba has do for enabling the "fast-start failover concept" in the event of loss of primary database without requiring any manual steps to invoke the failover.whether the configuration are to be made in parameter file if yes what are those ?
View 1 Replies View RelatedMy Data Guard 's Enviroment:
Primary: 11.1.0.7 RAC 2 Nodes
Standby: 11.1.0.7 Single Instance
I want to implement Fast-Start Failover at my enviroment. Reading requirements, I found that Oracle Flashback is needed (I don't use Flashback on my databases).
Best Practices recommends 60 min (1 hr) for DB_FLASHBACK_RETENTION_TARGET if I just want to use Flashback to fast-start failover.
My questions:
What 's better, setup up flash recovery area on ASM or O.S. filesystem?
What is the recommended size for flash recovery area?
I have a situation where I want to configure primary database (11.2) with 2 remote destinations. dest_2 is the default and points to a standby on host_2. However, I also want the primary db to continue transporting redo to dest_3 on node_3 when node_2 is taken down (planned or unplanned).
1) Configure the ALTERNATE attribute of dest_2 to point to dest_3.
2) Configure tnsnames client-side failover on primary host to point to 2 nodes (node_2 and node_3).
After switchover the primary is now standby and standby is now primary, the clients are unable to connect to new primary database.
TNSNAMES.ora file at client side...
prim.world=
(DESCRIPTION_LIST=
(FAILOVER=true)
[Code].....
SQL> conn iq/iq@prim.world
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
SQL> conn sys/ora123@prim.world as sysdba
Connected.
SQL> select open_mode from v$database;
OPEN_MODE
--------------------------------------------------------------------------------
MOUNTED
SQL> select database_role from v$database;
DATABASE_ROLE
--------------------------------------------------------------------------------
PHYSICAL STANDBY
SQL>
--------------------------------------------------------------------------------
It's Oracle 10.2.0.1.0 version....
Dataguard and RMAN.
Got Active DataGuard on a primary database, quite nicely sending its archive logs to its secondary. I can quite happily use the Broker and switchover between them.
Now if I take RMAN backups of the primary database, if I have to failover to the secondary, I'm gonna loose all those backups.
Well, I can restore the whole database to the backup, cos I can restore the control file, from the backuip and therefore I can restore the whole db.
But if I want to restore to a tablespace, I wont be able to , cos the db_unique_names names are different, and the DB ID's will be different.
Same goes if I use a recovery catalog....
so how do I failover/switchover without loosing my previous rman backups ??
i have Oracle 10g data guard set up on windows environment.....i need to know the what are the right steps to perform failover in case the primary database gets fail.
View 4 Replies View RelatedIf flashback is enable in physical standby database 1. If we failover at 11AM can I flash back NEW primary database to 6 AM ? 2. if I convert physically standby database to snapshot standby database at 11AM , Can I flashback snapshot standby database to 6 AM and do some works on it (DML operations) then converting the snapshot standby database into physical standby database ?
View 1 Replies View RelatedWe have physical data guard configured version (10.2.0.4). We are in need to upgrade primary & standby database to 11G R2. Can we perform rolling upgrade.
View 3 Replies View RelatedControlling User Access to Tables in a Logical Standby Database can be controlled using the following command:
ALTER DATABASE GUARD STANDBY;
My simple question is: how can I know the current active Guard setting in the standby database?
Oracle 11g R2.
i have configured physical standby in my local system, to check logshipping i created a table at primary db, wen i tried to check in standby, it says table does not exist..below are primary & standby alert entries..
Primary alert log
Fatal NI connect error 12514, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.0.98)(PORT=1522))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=STAND)(SERVER=dedicat ed)(CID=(PROGRAM=d:oracle11gappadministratorproduct11.1.0db_1inORACLE.EXE)(HOST=A960M)(USER=SYSTEM))(SERVER=dedicated)))
VERSION INFORMATION:
TNS for 64-bit Windows: Version 11.1.0.6.0 - Production
[code]....
I want to change dbname,sid,data/control file locations in operational dataguard setup i plan to follow as below
1)shutdown primary and standby (stop managed recovery)
2)change db name in init.ora of primary and standby change database name control file location
3)create control file for primary from trace(script) make changes for db name and file locations
4)mount and open primary database
5)create standby control file
6) transfer standby control file to standby
7) mount stand by database and start manage recovery
If this steps will error free do i need to follow any thing additional to this or what is other best way for this or its not possible at all
Oracle Version: 11.1.0.7.0
Active Dataguard
Statspack has been configured for Active Dataguard on Primary database.We got an spike of Buffer busy waits for about 5 min in Active Dataguard, this was causing worse Application SQL's response time during this 5 min window.Below is what i got from statspack report for one hour
Snapshot Snap Id Snap Time Sessions Curs/Sess Comment
~~~~~~~~ ---------- ------------------ -------- --------- -------------------
Begin Snap: 18611 21-Feb-13 22:00:02 236 2.2
End Snap: 18613 21-Feb-13 23:00:02 237 2.1
Elapsed: 60.00 (mins)
[code]...
Why there could sudden spike of demand on UNDO data in Active Data Guard ?
I am working in a bank as an system consultant, i have a SAN Storage Area and oracle as below.
SAN 1
This interface includes the DATA FILES of the oracle tablespace
SAN 2
SAN1 Mirrors the DATA FILES of the oracle tablespace to SAN 2
1. Can i rely on real time data recovery from SAN2 ?
2. if SAN1 (Data Files are currupted) will the SAN2 Data Files will be currupted as well.
3. If the SAN2 is currupted then what Oracle Features can be used to have uncurrupted data.
i did everything writen but when i do *SQL>alter database recover managed standby database disconnect from session;*
i go and look in the standby database AlertLog file ,and thats whats writen
*ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: 'F:ORACLEPRODUCT10.2.0ORADATADBSYSTEM01.DBF'
ORA-27041: unable to open file
OSD-04002: غير قادر على فتح الملف
O/S-Error: (OS 3) The system cannot find the path specified.
[code]....
strange thing that it realises the primary database in drive F and it goes to it but i dont understand what could be the reason of this ,although im doing this command while primary database is shutdown!
I configure logical standby online .when I execute dbms_logstdby.buid,first
SQL> EXECUTE DBMS_LOGSTDBY.BUILD;
it was blcoked by other sesson,then i kill the holding session,but no work.then i cancel this step and execute it again . the error is
SQL> EXECUTE DBMS_LOGSTDBY.BUILD;
BEGIN DBMS_LOGSTDBY.BUILD; END;
*
ERROR at line 1:
ORA-01354: Supplemental log data must be added to run this command
ORA-06512: at "SYS.DBMS_LOGMNR_INTERNAL", line 3669
ORA-06512: at "SYS.DBMS_LOGMNR_INTERNAL", line 3755
ORA-06512: at "SYS.DBMS_LOGMNR_D", line 12
ORA-06512: at line 1
ORA-06512: at "SYS.DBMS_INTERNAL_LOGSTDBY", line 370
ORA-06512: at "SYS.DBMS_LOGSTDBY", line 157
[code]....
I have set up a cross platform (Microsoft Windows IA (32-bit) -> Linux x86 64-bit) data guard and it worked fine.Then I did a switch over (which again worked) and found out the data is not getting replicated at all.. checked the data files available from the new primary database and found out they are in the windows format as below..
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
D:ORACLEAPPADMINISTRATORORADATAMFSSYSTEM01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSSYSAUX01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSUNDOTBS01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSUSERS01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSRMANRMAN_TS01.DBF
and physically they were created at '/home/app/oracle/product/11.2.0/db_1/dbs/' and as
D:ORACLEAPPADMINISTRATORORADATAMFSREDO02.LOG
D:ORACLEAPPADMINISTRATORORADATAMFSREDO03.LOG
D:ORACLEAPPADMINISTRATORORADATAMFSRMANRMAN_TS01.DBF
I configured dataguard in my local system.
1) scn differs wrt primary in standby (i checked, 1day difference), how to make scn same?
2)i created a table in primary, its not refelecting in standby, (below i ve pasted alertlog entries)
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:oracle11gappadministratordiag
dbmsstandstand racestand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 2 - see DBWR trace file
ORA-01110: data file 2: 'D:ORACLE11GAPPADMINISTRATORORADATASTANDSYSAUX01.DBF'
[code]....
3)wen i try to open standby database in read only mode gives below error..
ERROR at line 1:
ORA-16004: backup database requires recovery
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1:
'D:ORACLE11GAPPADMINISTRATORORADATASTANDSYSTEM01.DBF'
Our organization has recently decided to go for storage metro cluster solution for disaster recovery. In a Data guard environment, we normally calculate how much archive log is generating and based on that value we calculate the required bandwidth.
For storage metro cluster, we need to find how much block is changing in our primary database, and the same rate of change would apply on DR cluster. Now, i need to give the assumption how much changing is happening in my system. How to calculate the change.
What is expected behavior for VIP on Linux servers? ( 2-node RAC)
1.When entire RAC stack is running, and one node is rebooted or crashed? Will VIP fail over to second node?
2.When one node RAC stack is contained (crsctl stop crs), shutting down RAC stack on remaining node? What happens to the VIP and Scan IP?
3.When RAC stacks are down on both nodes, one node has VIP on (eth0:1), reboot this node. What happens to the VIP?
We see some behavior in scenario 3, but don't know why the VIP was moved to second node as all Oracle processes are down.
i'm using a mixture of Oracle� Data Guard Concepts and Administration11g Release 1 (11.1) And Bulletin : MAA - Creating a RAC Physical Standby for a RAC Primary 10g ( on oracle support) But neither is comprehensive for what i'm trying to do.
setting up Data Guard Broker on a RAC Data Guard environment?
My application uses below jdbc url for database connectivity. Today one of the db node was down for one hour and FAIL OVER did not happen.
<connection-url>
jdbcracle:thin:@(DESCRIPTION=(LOAD_BALANCE=ON)(FAILOVER=ON )(ADDRESS=(PROTOCOL=TCP)(HOST=viphost1)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=viphost2)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=serv ice_name)))
</connection-url>
Log shipping stopped logging/shipping into the Standby Database in one of our Oracle Data Guard Servers about two month ago and there was no change carried out as at that time. The Data Guard has only one Standby database. I have been managing the log shipping and recovery manually.
View 1 Replies View RelatedI want to implement data guard on same PC.
View 1 Replies View RelatedI did upgrade from 10.2.0.1 to 10.2.0.4 on the secondary database , the primary database version is 10.2.0.4,i took cold backup from the primary to the secondary database , when i try to create control file on the secondary , i am getting this ORA-01130: database file version 10.2.0.3.0 incompatiable with ORACLE version 10.2.0.1.0.*
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for 64-bit Windows: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
configure correctly my application, Oracle is version 11R1
My physical configuration is :
Site 1 (main building)
database on cluster : server1, server2
database : BASE1 available
Site2 (Backup Site)
database on cluster : server3, server4
database : DGBASE1 not available for users (dataguard)
I want to acces BASE1 first in load balancing server1,2 (normal usage) and DGBASE1 in load balancing server3,4 in case of failover after 5 retries of 10 secondes (in case of main buiding out of order, DGBASE1 will be available for users)
This is my actual setup :
(DESCRIPTION_LIST=(FAILOVER=ON)
(DESCRIPTION=
(ADDRESS=(PROTOCOL=TCP)(HOST=server1)(PORT=1234))
[Code]....
My trouble is that with this configuration, access it randomly BASE1 or DGBASE1 but DGBASE1 is not available for users then I have failure
What could be the right configuration to obtain BASE1 first in load balancing (normal usage) and DGBASE1 in load balancing in case of failover of the BASE1 after 5 retries of 10 secondes ?
I can see that some failover events etc aren't supported (Differences between the ODP.NET Managed Driver and Unmanaged Driver), but is failover supported at all? I don't need to get notified, just to get the failover (clustered node switching) working. Is it supported in the managed driver?
View 1 Replies View RelatedI'm trying to prepare data guard operation on the virtual machines.
1. I have install Oracle database without start up database on the standby server.
2. I try to connect this db by sysdba, but failed!
Quote:
C:>sqlplus "/as sysdba"
SQL*Plus: Release 11.1.0.6.0 - Production on Wed Jan 5 20:03:33 2011
Copyright (c) 1982, 2007, Oracle. All rights reserved.
ERROR:
ORA-12560: TNS:protocol adapter error
Enter user-name:SQL*Plus: Release 11.1.0.6.0 - Production on Wed Jan 5 20:03:33 2011
Copyright (c) 1982, 2007, Oracle. All rights reserved.
ERROR:
ORA-12560: TNS:protocol adapter error
Enter user-name:
I'm using instruction below: [URL]
Why I can't login to database?
