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.
I am going to change some parameters on primary database (db cache, java pool etc.). I am not sure, if the changes are automaticallly propagated to standby or if I have to make the changes manually on stanby site too? I couldn't find clear answer in documentation. how parameter changes work in dg physical configuration?
how to change non - SYS oracle users' password in data guard envirnment. We all know that for SYS password change in data guard. DBA has to change in primary database by either "alter user SYS identified by xxxx" or create password file with orapwd.
Then scp password file to standby database. However, if I want to change SYSTEM or DBSNMP passwords, I change on primary with " alter user ....." SQL, then new passwords will be login dictionary. But this new SYSTEM pqssword will be shipped with redo log to standby and SYSTEM password on standby will be updated? I need technical answer on this question
I have a requirement to change the instance parameter of the primary database and standby in the data guard. Any procedure to do the same. I have to do it directly on production and there is no test set up so I cannot experiment . The procedure I am thinking of is as below.
1. Stop the standby
2. backup the primary
3. Change the parameter and restart to make it effective
4. Start the primary
5. Go to stand by
6. Change the parameter and mount the database.
7. Check if both are in sync and apply logs if not.
I am using oracle 10g with data guard configured , I have primary ( A ) and standby database ( B ) .But because of some unavoidable conditions the primary database ( A ) got shutdown and was not starting , We shifted the standby database ( B ) at new location and changed it to primary with following command ,
startup mount; alter database recover managed standby database finish; alter database commit to switchover to physical primary; shutdown; startup;
This new primary ( B ) was open for end users for 2 days during which old primary ( A ) was shutdown .
I took the backup of ( B ) and restored it on A AND shutdown the B . Now A is acting as Primary database. Server B is shutdown . I want to change server B to standby database with A running as Primary .Is it possible ?
We 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.
We have 2 node (n1 nad n2 ) RAC and 3rd node (n3) with Dataguard logical database for reporting ..
1. logical database (n3) not syn with primary (n1,n2) 2. During repair above mentioned problem by mistake my logical(n3) also become primary 3. now how I will again change my n3 to logical 4. I got following error
RE: ORA-16009: remote archive log destination must be a STANDBY database
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
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
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
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'
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?
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...
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.
I 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
I have to implement Physical standby using same SID. parameters required to set on Primary and standby. Also what entries are required to do in TNS file. Recently we have faced hardware failure.
tell me about data guard accommodate with 11g database standard additions or not if no,is there any way to make it working under this edition?one more thing may i have the steps of configuration data guard in real time for anew server.
