About physical standby database

We have physical standby database(10g). what are steps to put standby database in ready only mode for time being and then put it back in primary-secondary relationship once cheking is done?

Cancel the redo Apply
SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;Open The database
SQL>ALTER DATABASE OPEN;Do your stuff.
Once done, shut it down, then mount it again and resume the redo apply
SQL>SHUTDOWN IMMEDIATE;
SQL>STARTUP NOMOUNT;
SQL>ALTER DATABASE MOUNT STANDBY DATABASE;
SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT;If you use real-time redo apply, you may want to issue the following command instead of the previous one.
SQL>ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT;...and pretty much that is it.
Be aware that while running it in read-only mode, no logs from the primary are being applied. Also you may hit some bugs when you open your standby database. So if this standby is your production one, make sure you know how to deal in a situation when you need to resolve possible issues.
Jason Arnell has explained one possible buggy scenario on his blog - LINK.
--Mihajlo                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Similar Messages

  • About Data Guard - Physical Standby Database

    Dear All,
    I have read many documents regading Data Guard.
    I am about to setup Data Guard in our current environment but want to clear few tings.
    I have a confusion between physical and logical standby database.
    What I have read from different documents is:
    -Physical Standby Database in (11g)
    1) It is the most efFicient
    2) I can be either in mount or open state
    3) Select queries and reporting can be done to improve performance of the primary database.
    4) Schema on primary and standby database is always the same
    -- Logical Standby Database
    1) You can create additional tables, indexes, etc.
    2) Always in open mode
    3) Select queries and reporting can be done to improve performance of the primary database
    Now our scenerio is, that we have one server at the moment, OS is linux and operating system is 11g. We want to setup an other server in another country, will also be 11g on Linux in a way that it acts as standby/backup server. Schema and data is always the same. In case due to unavailability of primary server, standby server acts as the primary server (This has to be automated). The reason for unavailability could be any like maintenance work on primary server, network or hardware failure at primary server. The last and the most important thing is that users from this country where we will setup standby database will insert/update data on the primary server BUT queries and reporting will be done from this newly created standby data.
    Kindly recomend the best Data Guard in this scenerio and kindly correct me where I am wrong.
    Thanks, Imran

    A logical standby has various limitations on things like data types. It's also a much more complex architecture, which makes it more likely that something will break periodically and require attention. Applying redo to a physical standby is code that has been around forever and is as close to bullet-proof as you'll get. And you would generally prefer to fail over to a physical standby-- if you do things like create new objects in the logical standby, you may have to get rid of those objects during a failover to get acceptable OLTP performance.
    Justin

  • Physical Standby database Vs. Logical Standby database

    I have few questions regarding capability of Logical Standby Database against Physical Standby database.
    1. How efficient is Logical Standby database in terms of Physical Standby Database?? How both differ from each other and can I use Logical Standby Database for disaster Recovery?? Can It be use for recovering the failed Primary Instance?? If yes how efficient and reliable it is??
    2. What are the known bugs and roadblocks for logical standby database on Oracle 10.2.0.1 on Soalris X86-64?
    3.As logical standby database not going to replicate each and every schema of Primary database?? how is the change management effects to the logical standby from primary?? I mean there are some parameters and job that we create on primary how can it be transferred over to the logical standby??

    1. How efficient is Logical Standby database in terms
    of Physical Standby Database?? How both differ from
    each other and can I use Logical Standby Database for
    disaster Recovery?? Can It be use for recovering the
    failed Primary Instance?? If yes how efficient and
    reliable it is??I'm not sure what sort of "efficiency" you're talking about here...
    Physical standby is just the old, tried and true application of archived logs to recover a database. Very solid, very old school.
    Logical standby, on the other hand, is parsing the redo log, extracting logical change records, and applying them to the standby database. This obviously takes a bit more processing effort, it's newer technology, it doesn't have quite the level of support that physical standby does (i.e. certain data types are excluded), etc. You certainly can use it for failover, but it isn't quite as robust as a physical standby. Of course, this is getting better and better all the time and is definitely a focus of Oracle's development efforts.
    On the other hand, logical standby systems can do things other than act as a warm standby. They can be open serving reports, for example. You can create additional structures (i.e. new materialized views) to support reporting. A physical standby is pretty much always going to be in managed recovery mode, so it cannot be queried.
    2. What are the known bugs and roadblocks for logical
    standby database on Oracle 10.2.0.1 on Soalris
    X86-64?a) You'll want to do a Metalink search
    b) If you're talking about a high-availability solution, why are you looking at a base release of the database? Why wouldn't you apply the latest patchset?
    3.As logical standby database not going to replicate
    each and every schema of Primary database?? how is
    the change management effects to the logical standby
    from primary?? I mean there are some parameters and
    job that we create on primary how can it be
    transferred over to the logical standby??I'm not sure I understand... Changes made to the primary generate redo. Oracle parses that redo, generates a LCR, and sends that to the standby database where that change record gets applied.
    Justin

  • Questions regarding creating a physical standby database in 10gR2

    I'm setting up a physical standby database in a test environment using two windows 2003 servers. I was wondering if someone could answer a few questions I'm not too clear on. I've been thru the data guard manual and as much online information as i can find. I may have it working but wanted to post some things I'm not sure I did quite right.
    My tnsnames.ora files.
    On my primary database server:
    # tnsnames.ora Network Configuration File: F:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora
    # Generated by Oracle configuration tools.
    PRIMARY =
    (DESCRIPTION =
    (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = SERVER1)(PORT = 1521))
    (CONNECT_DATA =
    (SERVER = DEDICATED)
    (SERVICE_NAME = PRIMARY.MYDOMAIN.com)
    STANDBY =
    (DESCRIPTION =
    (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = SERVER2)(PORT = 1521))
    (CONNECT_DATA =
    (SERVICE_NAME = STANDBY.MYDOMAIN.com)
    On my physical standby database server:
    # tnsnames.ora Network Configuration File: f:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora
    # Generated by Oracle configuration tools.
    STANDBY =
    (DESCRIPTION =
    (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = SERVER2)(PORT = 1521))
    (CONNECT_DATA =
    (SERVICE_NAME = STANDBY.MYDOMAIN.com)
    PRIMARY =
    (DESCRIPTION =
    (ADDRESS_LIST =
    (ADDRESS = (PROTOCOL = TCP)(HOST = SERVER1)(PORT = 1521))
    (CONNECT_DATA =
    (SERVER = DEDICATED)
    (SERVICE_NAME = PRIMARY.MYDOMAIN.com)
    My Listener.ora files:
    On my primary database server:
    # listener.ora Network Configuration File: F:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora
    # Generated by Oracle configuration tools.
    SID_LIST_LISTENER =
    (SID_LIST =
    (SID_DESC =
    (GLOBAL_DBNAME = PRIMARY.MYDOMAIN.com)
    (ORACLE_HOME = f:\oracle\product\10.2.0\db_1)
    (SID_NAME = primary)
    LISTENER =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = server1.mydomain.com)(PORT = 1521))
    On my physical standby database server:
    # listener.ora Network Configuration File: f:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora
    # Generated by Oracle configuration tools.
    SID_LIST_LISTENER =
    (SID_LIST =
    (SID_DESC =
    (GLOBAL_DBNAME = standby.mydomain.com)
    (ORACLE_HOME = f:\oracle\product\10.2.0\db_1)
    (SID_NAME = standby)
    LISTENER =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = sever2.mydomain.com)(PORT = 1521))
    The next item I'm not sure about is after creating the control file for standby use.
    One the primary server I created it using:
    alter database create standby controlfile as 'sbcontrol01.ctl';
    I copied the primary database pfile I had created earlier to the standby server, renamed it and edited it.
    Initially I left the CONTROL_FILES= parameter pointing to the control01.ctl, control02.ctl and control03.ctl that I restored. But I was getting the error ORA-01665: control file is not a standby control file
    So I copied the sbcontrol01.ctl to sbcontrol02 and sbcontrol03.ctl and pointed the CONTROL_FILES= parameter at them.
    The error went away and the database came up. I still need to test it some more but wanted to see if what i did was correct or a fluke.
    Edited by: tjohnson on Mar 23, 2009 2:26 PM

    If in the primary I had control files named control01, control02 and control03 would I have been able to create a standby controlfile called control01.ctl or would I have had to name it something else like I did (sbcontrol01.ctl) and rename it to control01.ctl once I got it over to the standby database server?Suppose you have the primary database control file in C:\oracle\primary\control location with names control01.ctl and control02.ctl. Then also you can create a standby controlfile with control01.ctl and control02.ctl , but then the location to be created must be different.You can create it in C:\oracle\primary location and then transfer to the specified location mentioed in the pfile of the standby database and mount the standby database.
    But saying this i would suggested to keep the name different from control01.ctl as far as naming conventions are followed.It might confuse someoe whether its a primary database controlfe or a standby database controlfile.Usally primary database controlfile are named control01.ctl , coltrol02.ctl etc and for standby many do prefer keeping standby01.ctl, standby02.ctl.Thats just for for understanding.
    HTH
    Anand

  • More than One Physical Standby Database

    Hi All!
    Is it possible to have more than one physical standby database? Does the procedure on how to create a single physical standby is the same as creating more than one? How about the configuration of the Primary database? Im planning this because I want the other physical standby to be used for read only access for our testing environment.
    Please enlighten me.
    Regards,
    cmadiam

    Think about it.
    Q. What's the crux of Dataguard setup?
    A. Redo transfer from primary to standby
    Q.Which is the parameter you use to direct the redo transfer
    A. LOG_ARCHIVE_DEST_n
    Q. How many LOG_ARCHIVE_DEST_n parameters can be set?
    A. 10; LOG_ARCHIVE_DEST_1 to LOG_ARCHIVE_DEST_10
    Of the 10 LOG_ARCHIVE_DEST_n, one of them should be LOCAL destination, which means you can have 9 other REMOTE destinations ~~ 9 standby database. Physical or logical or mix of both.
    Cheers.
    Note: Each of the 9 standby database can cascade redo transfer to 9 other cascaded standby databases. WOW! now you do the math.

  • Physical standby database, dblinks derived frn schemas help

    I observed that many of the procedure,function,trigger of the database using dblinks which are derived from two schemas within the same database (i.e. eg: DBlink "CIS_TO_HIS" created in CISPROD schema connecting HISPROD schema of the same database). Now Oracle doesn't recommend this type of coding as a suitable.
    But I am more concerned about implementing the same code over data guard in Physical standby database as it will be in read only mode and will have different TNS names entry. Therefore since database link uses TNS entry and physical standby would be using a separate TNS entry from primary, this might be a risk of transaction using those dblinks will fail. Hence can you please let me know the risk areas in physical standby of using dblink within same database?

    The best solution for you is to stop using DB links between different DB schemas in the same DB.
    If you do not use RAC, one workaround would be to use the loopback IP (127.0.0.1) to define your TNS connection over.
    <Your DB>=
    (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)                                                            
      (HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = <Your DB>)))That way, if you hit the production server, the TNS will lead you to the production DB, and if you hit the standby server, you’ll go to the standby DB.
    You would need to create another TNS entry for the production DB on the standby server and use it for standby replication.
    Since this change might affect production operation and failover abilities, you need to thoroughly test it.
    Iordan Iotzov
    http://iiotzov.wordpress.com/

  • Physical standby database fail-over

    Hi,
    I am working on Oracle 10.2.0.3 on Solaris SPARC 64-bit.
    I have a Dataguard configuration with a single Physical standby database that uses real time application. We had a major application upgrade yesterday and before the start of upgrade, we cancelled the media recovery and disabled the log_archive_dest_n so that it doesn't ship the archive logs to standby site. We left the dataguard configuration in this mode incase of a rollback.
    Primary:
    alter system set log_archive_dest_state_2='DEFER';
    alter system switch logfile;
    Standby:
    alter database recover managed standby database cancel;Due to application upgrade induced problems we had to failover to the physical standby, which was not in sync with primary from yesterday. I used the following method to fail-over since i do not want to apply any redo from yesterday.
    Standby:
    alter database activate physical standby database;
    alter database open;
    shutdown immediate;
    startupSo, after this step, the database was a stand alone database, which doesn't have any standby databases yet (but it still has log_archive_config parameter set and log_archive_dest_n parameters set but i have 'DEFER' the log_archive_dest_n pointing to the old primary). I have even changed the "archive log deletion policy to NONE"
    RMAN> configure archivelog deletion policy to none;After the fail-over was completed, the log sequence started from Sequence 1. We cleared the FRA to make space for the new archive logs and started off a FULL database backup (backup incremental level 0 database plus archivelog delete input). The backup succeded but we got these alerts in the backup log that RMAN cannot delete the archivelogs.
    RMAN-08137: WARNING: archive log not deleted as it is still neededMy question here is
    1) Even though i have disabled the log_archive_dest_n parameters, why is RMAN not able to delete the archivelogs after backup when there is no standby database for this failed-over database?
    2) Are all the old backups marked unusable after a fail-over is performed?
    FYI... flashback database was not used in this case as it did not server our purpose.
    Any information or documentation links would be greatly appreciated.
    Thanks,
    Harris.

    Thanks for the reply.
    The FINISH FORCE works in some cases but if there is an archive gap (though it didn't report in our case), it might not work some times (DOCID: 846087.1). So, we followed the Switch-over & Fail-Over best practices where it mentioned about this "ACTIVE PHYSICAL STANDBY" for a fail-over if you intend not to apply any archivelogs. The process we followed is the Right one.
    Anyhow, we got the issue resolved. Below is the resolution path.
    1) Even though if you DEFER the LOG_ARCHIVE_DEST_STATE_N parameter's on the primary, there are some situations where the Primary database in a dataguard configuration where it will not delete the archive logs due to some SCN issues. This issue may or may not arise in all fail-over scenarios. If it does, then do the following checks
    Follow DOCID: 803635.1, which talks about a PLSQL procedure to check for problematic SCN's in a dataguard configuration even though the physical standby databases are no available (i.e., if the dataguard parameters are set, log_archive_config, log_archive_dest_n='SERVICE=..." still set and even though corresponding LOG_ARCHIVE_DEST_STATE_N parameters are DEFERRED).
    If this procedure returns any rows, then the primary database is not able to delete the archivelogs because it is still thinking there is a standby database and trying to save the archive logs because of the SCN conflict.
    So, the best thing to do is, remove the DG related parameters from the spfile (log_archive_config, log_archive_dest_n parameters).
    After i made these changes, i ran a test backup using "backup archivelog all delete input", the archive logs got deleted after backup without any issues.
    Thanks,
    Harris.
    Edited by: user11971589 on Nov 18, 2010 2:55 PM

  • Creating a Physical Standby Database using OEM GC

    This Paper is about the creation of a physical Stanby Database using OEM GC.
    You will see that there is really nothing to it and using the Data Guard Broker, performing a switchover is as easy as 1,2,3,.
    BTW, this works in both OEM GC 10.2.0.5 and 11.1
    http://oemgc.wordpress.com/2010/07/19/creating-a-physical-standby-database-using-oem-gc/

    Thanks Rob for sharing this.
    Regards
    Rajesh

  • Upgrading with a physical standby database in place

    Hi all
    I am planning to upgrade my database which is 11.2.0.1 (Windows 32 platform) to 11.2.0.3. It has a primary standby database. I only have 1 server for testing the primary database, so I am looking for some help.
    I was reading http://docs.oracle.com/cd/B28359_01/server.111/b28294/upgrades.htm#CHDBJAGG and I confuse about step 4 and 5
    +4. Install the new release of the Oracle software into a new Oracle home on the physical standby database system, as described in the Oracle Database Upgrade Guide.+
    +5. Mount the physical standby database.+
    My question is in step 5, when I mount the physical standby database, does it mounted using new Oracle binary or still using the old version? From my understanding what is step 4 doing is to copying files to new home only. Changing the service to use the new oracle binary is done by dbua. I know this when I test upgrading the primary database.
    Regards
    Stanley.

    Hello;
    new Oracle binary or the new Oracle home if you will.
    So you install the new software on the standby only, all the upgrade SQL gets done on the Primary and then you ENABLE and startup mount on the new oracle home and the standby gets upgraded from the Primary redo.
    Its pretty simple ( My exact plan )
    1. Disable log shipping from the Primary
    2. Shutdown Standby
    3. Install 11.2.0.3 on Standby - Just the software
    4. Startup Standby in recovery mode - do NOT run r any SQL at the standby
    5. Shutdown Primary
    6. Install 11.2.0.3 on Primary
    7. Run Upgrade SQL or DBUA at Primary
    8. Re-enable log shipping
    9. Monitor the redo apply from Primary to Standby - this will also upgrade the Standby data dictionary
    Make sure your tnsnames and listener files move to the new Oracle home and edit as needed.
    Another oracle note is 278641.1
    Best Regards
    mseberg
    Edited by: mseberg on Jan 29, 2013 8:21 PM

  • Failover To Physical Standby Database

    We have 3 node RAC 11.2.0.3 Primary database data guarded to a 3 node RAC 11.2.0.3 Standby database. There is an activity scheduled to perform some of order extracts in the database which is going to result in a lot of changes. Currently the discussion is on whether what should be the quickest way to go back to a point in time before the extract process starts in case of any issues. The options that we are looking at are:
    1) Create a guaranteed restore point on both the Primary and Standby and use this to flashback the database (Quick but we have had issues where in the guaranteed restore point still does not guarantee the availability of the flashback logs) - Tested
    2) Use RMAN backup from a day before to restore and recover to point in time before the extract process began (Time consuming) - Tested
    3) Use export backup to perform a redirected restore i.e import the data from before the extract process (Time consuming) - Tested
    4) Create a guaranteed restore point on both Primary and Standby, stop the Redo Apply/Ship at the time we create the guaranteed restore point and at a point we face some issue and need to go back, simply failover to the physical standby database and then reinstate the new standby database - This has not been tested yet but seems a viable option
    With regard to the point 4, note that we are not concerned about data loss as the whole point of stopping the redo apply is to prevent the standby to be caught up with Primary during the run of the extract process. The question is whether the dataguard broker will allow failover of the primary to standby, in a situation described in bullet point 4). Please advice.

    HI,
    Please check this link:
    Physical Standby Database SWITCHOVER &amp;amp; FAILOVER Operations | Talip Hakan Ozturk&amp;#039;s ORACLE BLOG
    Thank you

  • Adding a second physical standby database

    Please, here is my problem:
    I have a physical standby database working fine and I would like to add to it another physical standby database. Please, what about these two parameters:
    db_file_name_convert=('prim','second'),('prim',''third')
    and the same for log_file_) name_convert?
    Please, can I have any help from the gurus?
    Thanks for any help

    db_file_name_convern and log_file_name_convert is meant to be set on standby database
    it can have multiple values to remap paths values on standbying'
    like
    db_file_name_convert='source_string','target_string'
    db_file_name_convert='source_string1','target_string1','source_string2','target_string2','source_string3','target_string4'

  • Recovering Physical Standby Database

    I created a simple script to recover/synchronies physical standby database. This script runs on schedule basis and finds if any recovery is required and if so, it applies the required archived files, or otherwise it will give an error showing the suggested file is not found. I want to suppress that error message and I wonder if there is a way to do that, so Oracle will exit the session without displaying the error message.
    Thanks

    in earlier u ask about the error controling now younis u r asking about manual setup for standby.
    anyways yes it is possible.
    u create the replica of your database
    like install the other server with same version and same datafile location and alll...
    there is no automatic transmission from oracle but u can automate from script like using rpc and in windows its more easy to copy archive anyways
    shutdown ur primary database copy all relevant files
    and paste it to ur secondary database
    now your database is ready in other machine as well.
    now what routine you have to follow for doing manual standby is
    you have copy all archives daily after copy of physical db files and also your control file from the primary database.
    than recover database;
    regards,
    umair

  • Creating physical standby database on same machine with dataguard

    hi every one
    i m new in oracle databases,
    i read documentation to create physical standby databases,
    now i install virtual machine (vmware) on my system,
    i install windows xp on this vm and oracle 9i
    now i want to create standby database on the same machine in some other drive configured with datagurd
    virtual machine
    OS windows xp
    database oracle 9i
    plz reply me how i do this
    explain clearly step by step.
    plz reply me in detail

    When you need to have the standby database on the same server as the master, use lock_name_space in the init.ora.
    This parameter permits this to occur without having to worry about changing the db_name.
    http://www.oug-ottawa.org/pls/htmldb/f?p=103:21:729607614317189728::::P21_TIP_NUM:821

  • Error while creating physical standby database using Oracle Grid 10.2.0.5

    Hi All,
    I am setting up data guard using oracle grid.
    Primary database version: - 10.2.0.4
    Standby database version: - 10.2.0.4
    Primary OS Red Hat Enterprise Linux AS release 4 (Nahant Update 8)2.6.9
    Standby OS Red Hat Enterprise Linux AS release 4 (Nahant Update 8)2.6.9
    I am creating physical standby database using EM. But it is getting failed with error message in sqlnet.ora file
    Fatal NI connect error 12533, connecting to:
    (DESCRIPTION=(ADDRESS_LIST=)(CONNECT_DATA=(SERVICE_NAME=INPRDSB_XPT)(SERVER=dedicated)(CID=(PROGRAM=oracle)(HOST=indb50.oii.com)(USER=oracle))))
      VERSION INFORMATION:
            TNS for Linux: Version 10.2.0.4.0 - Production
            TCP/IP NT Protocol Adapter for Linux: Version 10.2.0.4.0 - Production
      Time: 17-AUG-2010 02:40:07
      Tracing not turned on.
      Tns error struct:
        ns main err code: 12533
        TNS-12533: TNS:illegal ADDRESS parameters
        ns secondary err code: 0
        nt main err code: 0
        nt secondary err code: 0As we can see, address_list is empty.
    Can anyone suggest what could be the reason behind this?

    Dear user13295317,
    Here is the error explanation;
    Oracle Error :: TNS-12533
    TNS:illegal ADDRESS parameters
    Cause
    An illegal set of protocol adapter parameters was specified.
    In some cases, this error is returned when a connection cannot be made to the protocol transport.
    Action
    Verify that the destination can be reached using the specified protocol.
    Check the parameters within the ADDRESS section of TNSNAMES.ORA.
    Legal ADDRESS parameter formats may be found in the Oracle operating system specific documentation for your platform.
    Protocols that resolve names at the transport layer (such as DECnet object names) are vulnerable to this error if not properly configured or names are misspelled.Hope That Helps.
    Ogan

  • SQL exception during creation of a physical standby database with EM

    Version: EM Oracle 10.2.5 (agents running, repository running, primary db running, all targets visible and reachable with EM)
    I try to create a physical standby database with the enterprise manager and each time the process is aborted with a SQL exception during the preparation of the job by the EM. I have added a part of the OMs log containing the error at the end of the excerpt.
    =============
    2010-04-29 16:00:39,856 [EMUI_16_00_39_/console/targets] WARN pref.SubtabPref getFolders.710 - Unknown folder id: VirtualServers retrieved from repository
    2010-04-29 16:01:04,765 [EMUI_16_01_04_/console/database/dataguard/create] ERROR em.dataguard validate.1329 - CreateBean: ClassNotFoundException: null
    2010-04-29 16:02:05,476 [EMUI_16_02_05_/console/database/dataguard/create] ERROR jobs.dbclone checkSetFileError.79 - DatabaseFileAttributes.checkSetFileError(): Null database file!
    2010-04-29 16:02:05,476 [EMUI_16_02_05_/console/database/dataguard/create] ERROR jobs.dbclone setControlfiles.160 - DatabaseFileAttributes.setDatafiles(): Invalid control file!
    2010-04-29 16:02:05,492 [EMUI_16_02_05_/console/database/dataguard/create] ERROR jobs.dbclone getControlFileNames.616 - DatabaseFileAttributes.getDatafileNames(): null datafile names!
    2010-04-29 16:02:32,823 [Thread-28] ERROR em.jobs remoteOp.2389 - DBVerify.remoteOp(): Error: max_stamp# 6071384
    2010-04-29 16:02:32,823 [Thread-28] ERROR jobs.dbclone submitJobPreparation.3297 - DBCloneObject.submitJobPreparation(): getMaxLogSequenceNum: Während der Vorbereitung des Jobs ist eine SQL Exception aufgetreten. Um das Problem zu diagnostizieren, legen Sie das Agent Perl-Skript-Tracing auf DEBUG fest und wiederholen den Vorgang
    2010-04-29 16:02:32,823 [Thread-28] ERROR jobs.dbclone submitJobPreparation.3501 - DBCloneObject.submitJobPreparation(): Exception: java.lang.Exception: Während der Vorbereitung des Jobs ist eine SQL Exception aufgetreten. Um das Problem zu diagnostizieren, legen Sie das Agent Perl-Skript-Tracing auf DEBUG fest und wiederholen den Vorgang
    2010-04-29 16:02:32,823 [Thread-28] ERROR jobs.dbclone submitDBCloneJob.3716 - DBCloneObject.submitDBCloneJob(): Exception: Während der Vorbereitung des Jobs ist eine SQL Exception aufgetreten. Um das Problem zu diagnostizieren, legen Sie das Agent Perl-Skript-Tracing auf DEBUG fest und wiederholen den Vorgang
    2010-04-29 16:02:37,496 [EMUI_16_02_37_/console/database/dataguard/create] ERROR em.dataguard onEvent.1243 - CreateConfigController: Exception: oracle.sysman.db.dg.util.VxxStandbyException: Während der Vorbereitung des Jobs ist eine SQL Exception aufgetreten. Um das Problem zu diagnostizieren, legen Sie das Agent Perl-Skript-Tracing auf DEBUG fest und wiederholen den Vorgang
    =========
    I have set the agent perl script tracing to DEBUG, but can't find any reason, why the job preparation failed.
    Has anyone an idea why the job cannot be prepared? Thanks in advance for investigation :-)

    Can you please tell me how can i see data gaurd on EM..
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    I have already started EM but i have no idea where to find datagaurd option..or how to create standdby db using EM..
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