I am cloning my prod db to test with the rman active clone command. I can successfully clone my DB, but after a few hours or so I see messages in the alert log that I have corrupted blocks in several datafiles. Note, i dont see these messages in my PROD DB therefore I think that DB has no corruption. I have few questions:
1) I was reading tha having tables or indexes set with the NOLOGGING option can cause objects to be unrecoverable. Would this affect my active clone?
2) I know you can either change a DB or tablespace to force logging. Is there a query I can use to determine if the DB is in force logging mode.
ALTER TABLESPACE tablespace_name FORCE LOGGING;
ALTER DATABASE FORCE LOGGING;
3) Lastly how to check as why my clone DB would have corrupted blocks.
Here is the clone command I am using.
rman catalog=rman/rman@proddb target=sys/sys@proddb << EOT
connect auxiliary sys/sys@clonedb
duplicate target database to clonedb from active database nofilenamecheck
pfile=/u01/app/oracle/product/11g/dbs/initclonedb.ora ;
exit
EOT
rman is used to duplicate database A to database B on another host
the duplicate process worked fine before we started testing encryption
the duplicate process worked fine with database A having an encrypted column in one table in a non-encrypted tablespace
Now, database A has an encrypted tablespace with nothing currently in it. The duplicate process now ultimately fails with ORA-19913, unable to decrypt backup.
I am not using encrypted backups, not specifying encrypt or decrypt anywhere in the duplication process. The only thing that is encrypted is the one tablespace in database A. I have the same wallet files on Host A (database A) and Host B (database B). Wallets are open. So why does the duplication process fail because the backup cannot be decrypted?
We are using oracle as database in our application. For high availability we have a cluster of multiple nodes and the data is replicated using oracle streams. All the nodes in the cluster are active. We do not have any concept of stand-by.
Now we are planning to use oracle RMAN for backup and recovery. RMAN user's guide doesn't recommend any strategies for such deployments. It mainly focuses on primary/stand-by deployments.
I'd like to confirm whether its possible to clone a database instance from a RAC cluster to a single server, with an additional issue that the RAC cluster is running Oracle 10g and the single server is running 11g. Can I do that directly or do I need an intermediate step to upgrade the database instace to 11g? Or can I even use exp/imp on RAC?
I have a active data guard database which is copy of my production database. can i backup the active database using RMAN? The ADG is a read only and dont know, if RMAN can backup an read only database.
O.S Version HP-UX B.11.31 U ia64 Oracle DB Version 11.2.0.3.0 Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production Storage : ASM Diskgroups -------------------------------------------------------------------------------------------------------------------------------------
I am new to Oracle, like to get clarified on below;
I like to duplicate the database DATABASEA to DATABASEB and need to be run in same server. I tried to bounce the listener & databaseb instance multiple times but no lucky.
Step 1 : The instance DATABASEB is in Nomount stage
Step 2 :
==> tnsping DATABASEB TNS Ping Utility for Linux: Version 11.2.0.2.0 - Production on 11-SEP-2012 07:36:54 Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = client )(PORT = 1521)) (CONNECT_DATA = ( SERVER = DEDICATED) (SERVICE_NAME = DATABASEB)(UR=A))) OK (10 msec)
Step 3 :
==> rman target sys/*****@DATABASEA auxiliary sys/********@DATABASEB Recovery Manager: Release 11.2.0.2.0 - Production on Tue Sep 11 07:37:50 2012 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. connected to target database: DATABASEA (DBID=1723462779) RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
I tried to clone a 2 node rac database to single instance non rac database using existing backup. I have not used connectivity to target or catalog. rman duplicate finished with below messages:
rman auxiliary sys/******@dbracdup RMAN> duplicate database to dbrac spfile backup location '/oracle/backup'; ... ... Finished recover at 25-JUL-12 Segmentation fault
And the database was in mount stage, and when i tried to open database it failed with below error:
SQL> alter database open; alter database open * ERROR at line 1: ORA-19838: Cannot use this control file to open database .
In DR site. i have to clone the database from pshysical standby database and clone db will be normal db not standby. Is it possible to do rman duplicate from active dataguard? will it support the duplicate database from active database or i have to take the rman backup of standby database and duplicate from backup piece.
O.S Version HP-UX B.11.31 U ia64 Oracle DB Version 11.2.0.3.0 Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production Scenario :
Using RMAN Active cloning to duplicate a RAC database from Production to Development environment.
Problem:
At the end of the cloning the below errors are reported; RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: ===========================================================
[code]...
How to prevent the error of RMAN-06054: media recovery requesting unknown archived log for thread with sequence and starting SCN of while performing the RMAN Active Cloning? I do NOT want to use UNTIL clause.
creating the standby database from Active database using RMAN and getting the below issue after i executed the duplicate command.
Version of Database:11g(11.2.0.1.0) Operating System:Linux 5 Error: RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of Duplicate Db command at 12/21/2012 17:26:52 RMAN-03015: error occurred in stored script Memory Script RMAN-04006: error from auxiliary database: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor [code]....
provide any work arounds to proceed further in creating the standby database.
The script has successfully created on standby db all controlfiles and also has copied 2 data files DATA01.DBF and DATA02.DBF into the correct location. Then the errors above kicked in and stopped the rman dup process.
I am getting starting with rac environments. I need to configure a two nodes active/active with rac and I need to know if always using rac both nodes will be active or if I have to do that at some point when installing. I have reading some docs from oracle and others authors about rac and its configuration process but that is not understood for my yet.
I have a sql script where triggers, procedures and functions are written. The triggers are causing db outages and causing problems in the application as well.
I am trying my best but with my low experience and expertise, am not able to make good progress.
Scenario: Course enrollments are inserted, deleted and updated in course_main and course_users table. This is done in gui as well as in background snapshot scheduler in a cron process. Course_main table contains all course enrollments and course_users table has crsmain_pk1 as foreign key.
Its quite a big file and am not sure what should i paste here so am uploading the file in txt.
While taking a full export i came to know there was a block corruption in SYSAUX tablespace. I dont have any COLD/HOTBACKUPS/RMAN BACKUPS. As i have only the Exp backups and the database is in archive log mode. Whether is it possible to recover the BLOCK CORRUPTION with exp backups.
How can i check for datafile corruption or a datafile error,its some tool like Linux (fsck) command in Oracle that can halp to me to chack a datafile?.
Is any way to isolate the disk region that is corrupted?
If a disk error exist an an ASM disk group how can i isolate the error from that disk group? It's an alternative different to the VALIDATE DATAFILE command in RMAN?I'm using Oracle 11GR2 on a Linux Box.
I am trying user managed recovery using archived and redo log files. I had restored old cold backup, then copy latest control file, redo log files, and archived log files at actual locations. Now I tried to recover database using following steps.
Quote: connect sys as sysdba startup mount; recover database; auto
After applied some archived files, one of the archived file corrupted and recovery cancel due to error, then i shut down the database. Now i want to copy corrupted archived file from backup and run the recovery further. so my question that should i have to run recovery from the beginning or can i run the recover from the last status of the database.
1) What is PHYSICAL/LOGICAL Corruption. 2) How it occurs. 3) Will RMAN works on both the types of corruption or only Physical (My senior told it works on both).
The database is running in archivelog mode and we have a standby with Maximum performance.There is no RMAN backup..We have noticed there is block corruption while accessing some tables.Now i would like to know are the corrupted blocks also replicated to the physical standby? Is there a way to recover the data from these corrupted blocks without shutting down the database ?
I have a query regarding the cloning of a database.
Actually, i have made the two machine on a single system(Laptop) and now i want to clone the database, so for that i am unable to move the database backup from one Machine to another.
how can i move the backup and which command is applicable for that.
Note: - Listener/TNS is already configured on both the database.
I was carrying out an experiment in order to crash the database and recover it.
The database was running, I moved the control file to another location and to my surprise the database was still running. I tried issuing checkpoint and transaction but it didn't affect database operations. I tried doing log switch. It completed successfully. According to my understanding and Oracle Certification books database was supposed to crash. But it didn't.
I tried this not only on RHEL, Windows XP but also in Solaris 5.10. The database version is Oracle 10.2.0.4 Standard Edition.
I have noticed a block corruption issue in my RAC database. Its an index , how to recover a corrupted index in system datafile.
SELECT tablespace_name, segment_type, owner, segment_name FROM dba_extents WHERE file_id = 5 3 and 147551 between block_id AND block_id + blocks - 1; TABLESPACE_NAME SEGMENT_TYPE OWNER
I am not able to get the relevant segment from the above information
SQL> select segment_name, segment_type, owner 2 from dba_extents 3 where file_id = 4 4 and 756652 between block_id 5 and block_id + blocks -1;
no rows selected
DBVERIFY Summary DBVERIFY - Verification complete Total Pages Examined : 3932160 Total Pages Processed (Data) : 3119107 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 755048
[code]....
I have uploaded the complete logfile.
Below is a part of logfile
DBVERIFY - Verification starting : FILE = /prd/dvp/ora/oradata/LHF/disk06/gds_t01_01.dbf Block Checking: DBA = 21728172, Block Type = KTB-managed data block **** kdxcoavs = -84 < 0, avail = 3129 ---- end index block validation Page 756652 failed with check code 6401 ##not here that 756652 is the same block# mentioned in v$database_block_corruption
I observed logical corruption in one of the database, while running select on some tables observed ORA-01410: invalid ROWID error. These errors or errors related to this logical corruption are not reported in alert log file.
Since our database is in NOARCHIVELOG mode and regular backups are not happening through RMAN (weekly cold mount point backup to tape), i was not able to use RMAN to investigate block corruption.
So used DBVERIFY on all datafiles of database to check the consistency of datafiles, and found DBV gives error for one of the datafile - 'Completely zero block found during dbv:' As i mentioned earlier, we are not taking regular backups using RMAN and database is in NOARCHIVE mode.
I'm using Oracle8i, with VB6 as front end When i try to connect Oracle using RDO in VB i get an error message from Oracle It is S1000:Oracle ODBC.ora Ora:1043 User Side Memory Corruption.
