Backup & Recovery :: Clone Large DB To DDL Only DB - EXP / IMP With Extents?
May 12, 2011
I am looking to create a DDL-only clone of a 2TB database. The purpose of this clone is to provide developers a preprod-like environment where they can test the syntax of their code changes before deploying to production. The database will reside on a seperate, small server.
As I only need the structure of the objects and not the data, my first port of call was EXP using rows=n. However, when I IMP to an indexfile I see that the initial extents have been defined on the tables (in some cases 1GB!). As stated my clone environment is small, so I would be looking to have these set at 1mb. how I can achieve this? I will want to be able to automate the cloning of the database as much as possible. Perhaps there's some other way other than EXP/IMP?
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Jan 4, 2012
how to clone database using cold backup,I want step by step guide for it
I want to give clone of production database to developers
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Mar 9, 2011
My management is asking me to find the best way to migrate our 3.3 TB data warehouse to a new server. I currently use RMAN to back up the database. This is done offline on Sundays, and it takes about 9 hours, compressed backups to disk. Archived log backups are done online, not in conjuction with the db backup.
I have read a number of documents detailing step to use OEM Db Control (aka dbconsole) to clone the database to the new server.
I have a few questions:
1. I need to clone the Oracle SW first, as our current install has patches, so it should take less time.
2. Do you think just restoring from the last RMAN backup and doing recovery would be faster than cloning?
3. On the new server, I have assumed that the root user (not me) would have to pre-create the OFA structure, e.g.; we have some mount points like /f01/oracle/DBNAME or /g01/oracle/DBNAME. I cannot imagine that the Db control Gui or Rman could create that structure on the target server. Is that correct?
4. There seems to be an attitude in my shop that the storage array mount points and OFA would not have to be identical on the target server. Any opinions?
Back in 1995, I successfully manually cloned a database to a new server in an HP environment, but it was only about 70G!!
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Apr 3, 2012
configure the clone the database on the same system. i m using window xp 2000 and oracle 10.2.1.
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Mar 26, 2012
I have run a standby clone that terminated with error due to few missing LV-s. I removed all LV-s for the clone, recreated them including the missing ones. I ran the clone again,but it skips the files that were successfuly duplicated in the previous clone request that failed. I need to be able to start the clone all over again, but RMAN does persistantly skip duplicating the datafiles that were successfuly processed in the first atempt.
How to ignore the RESUME option so that the clone process would start from the beginning? Where does RMAN keep the info about the successfuly duplicated datafiles in clone standby process? I have tried few RMAN tables , but no luck.
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Aug 20, 2012
i have just create a clone database. it work very well.but when i open the dbca to delete this database.it not show in dbca prompt. why ?
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Nov 2, 2010
We are migrating from a 9i db to 11g and we've been testing our apps on a similar (but not exact) machine as our production box.
Normally when we take a full export of the production data (on 9i) and import it into another 9i DB, the tables and indexes are created with the initial size large enough to hold the entire table. We also do our export with the compress extents param set to 'Y'.
However, we've noticed that when we import our data into the 11g DB, that tables are being created with multiple extents...sometimes up to 10 or 15. This seems to happen even with tables that don't even have extents on db that the export was taken from.
There ARE some differences in our 11g DB that i imagine might be the culprit, i've just been unable to narrow one of them down.
the differences i know of are:
a) the target DB has locally managed tablespaces while the source 9i DB had dictionary managed tablespaces
b) the block size is larger on the target 11g DB. 8192 vs 2048
c) the nchar character set on the source DB is AL16UTF16 and the target is UTF8 (we actually only have an nchar column in one of our tables...and also, the UTF8 setting was actually a mistake that we're correcting this weekend with a fresh DB and fresh import)
What would cause the import to produce all these extra tablespaces?
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Oct 1, 2012
How to clone database using RMAN FULL BACKUP on different machine? I do not wants to use DUPLICATE Command......
Is there any other way to clone DB? I am using Oracle 11g R1 on Windows Server 2007 (64 bit)
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Jun 3, 2013
I am trying to create a clone database using hot backup of a database .
STEPS THAT I FOLLOWED
------------------------------------
LET ----- >CURRENT_DB NAME=DEV
CLONE DATABASE NAME=DEVCLONE
steps PERFORMED FORM DEV DB
-----------------------------------------------
- put the database in backup mode using 'alter database begin backup'
- copy all the data files to a different folder
- during copy i have performed some operations on the DB (creating users, tables, dmls etc...)
- in between copying i also performed log switch
- after completion of copy , "alter database end backup"
- created a backup control file in a human readable format (alter database backup controlfile to trace as ........)
steps performed for clone DB side ((DEVCLONE)
-------------------------------------------------------------------
- created a parameter file for the database .
- modified the backup control file so that it will point to the location of copied destination of datafiles
- set the ORACLE_SID
- then 'sqlplus / as sysdba
- starup nomount
- run the modified control file ( created a control file for the clone database)
- recover the database using "recover database using backup controlfile"
I have provided the archive files that it was asking for (archive logs that has been generated in DEV DB)
then i canceled the recovery by typing "cancel"
- recover database using backup controlfile until cancel;
then typed "cancel"
- then try to open the database with open resetlogs but it showed below error
alter database open resetlogs
*
ERROR at line 1:
ORA-01195: online backup of file 1 needs more recovery to be consistent
ORA-01110: data file 1: 'D:DATA_GUARDDEVHOTSYSTEM01.DBF'
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Feb 10, 2011
We are trying to restore a database on the different server using RAM incremental level 0 and 1 backups. We have weekly Incremental level 0 backups along with incremental backups on daily basis. During recovery of Incremental level 0 backup, RMAN is expecting/looking for Incremental Level 0 backup of prior week as well. Is this the usual process for RMAN to look for prior level 0 backup though we need to restore from the current level 0 backup and roll forward by a week with subsequent Level 1 backup.?
We intend to restore from the Level 0 of 1/16 and roll forward with daily incrementals till 1/22. RMAN is expecting level 0 backupsets from 1/9 backup as well and keep failing since those backups are not available. quick inputs since we are in middle of recovery and trying to resolve if this is even doable.
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Oct 20, 2011
Here is the details
[oracle@localhost dbs]$ export ORACLE_SID=stby
[oracle@localhost dbs]$ sqlplus '/as sysdba'
SQL*Plus: Release 10.2.0.1.0 - Production on Thu Oct 20 09:47:34 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> !
[oracle@localhost dbs]$ pwd
/oraeng/app/oracle/product/10.2.0/dbs
[oracle@localhost dbs]$ exit
exit
[code].....
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Oct 18, 2011
I have problem on using "delete obsolete" in RMAN.
First, let describe my backup configuration.
1. Full backup every Monday (17-Oct, 10-Oct, 3-Oct, 26-Sep)
2. Incremental backup for other days
3. Enable autobackup of control file
4. Backup archive log every day
5. RETENTION POLICY TO RECOVERY WINDOW OF 30 DAYS
6. Execute "Delete obsolete" every day
7. control file is used instead of catalog
The results observed:
1. Backup of control files older than 30 days will be deleted
2. Backup of archive log files older than 30 days will be deleted.
3. Backup of datafiles older than ~14 days but before 30 days are also DELETED.
In my example, the backup of datafiles created at 26-Sep is deleted at 16-Oct.
I tried "restore database validate until time "sysdate-22"" at 17-Oct. And RMAN reported "datafile xx will be created automatically during restore operation". It seems that RMAN failed to do restoration up to 22 days ago. The retention policy I set seems not effective on datafile backups.
I checked view v$backup_set and the "Keep" is "No" and "Keep until" is empty.
The only thing I can think of, is the settings of "CONTROL_FILE_RECORD_KEEP_TIME". It is marked "7" in the Oracle, which is less than the retention. But I suppose this only causes the backup not deleted, but NOT be deleted earlier.
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Oct 18, 2012
understanding rman scn based Backup Algorithm .. In SCN based backup do rman generate backup from archivelogs ???
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Jul 25, 2012
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 .
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Jan 24, 2011
I have 2 seperate rman backup one backup is of only datafile ,spfile and controlfile which i am able to restore and recover without any problem say bkp1 taken at 10 am
other set of backup is of only archive log files of same day but later time than datafile backup say bkp2 taken at 8pm...if i restore and recover bkp1 and try to restore bkp2 it gives error datafile exist (possibly due to fact both backup have control file)
if i just restore bkp1 and try to restore bkp2 so that i can do one recover at time
it gives error datafile permission issue (possibly due to fact both backup have control file)
I want to restore database upto 8pm time how can i use both bkp1 and bkp2 to do it(restore datafiles and apply all archive logs on it)
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Jan 25, 2011
SQL> alter database mount;
Database altered.
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery
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Aug 13, 2013
My scenario is: database is in archivelog mode.
I run DLY cold backups including controlfile & archivelogs and keep 3 gens of backups and archivelogs to 3 days also. What is the correct procedure to restore back to an old cold backup. Database is backed up Mon,Tue,Wed on Thur we require to bring database back to Tuesday DLY security.
I have tried:
startup mount
restore database from tag 'DLYTUE'
recover database
( this just rolls forward on all archive logs once it restores datafiles, not getting to point to alter database open resetlogs.)
Next tried to :
recover database archivelog tag 'DLYTUE'
( same outcome )
What is the correct rman procedure including should I remove old archive logs from working OS directory ? Also need to know once I restore back and open database to TUE security how do you tidy up the archive logs and dumps which are no longer require i.e. : weds..
I have read about using the set until time option but how to I get absolute time from when cold backup completed if this is the correct procedure.
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May 28, 2008
I need to make my database to ARCHIVELOG mode when i try it it gives below following error
SQL> alter database archivelog;
alter database archivelog
*
ERROR at line 1:
ORA-00265: instance recovery required, cannot set ARCHIVELOG mode
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Sep 28, 2011
I have a database in Archivelog mode and Flashback mode. I am trying to connect to RMAN. But am getting the error
SQL> select name,log_mode,flashback_on from v$database
2 /
NAME LOG_MODE FLA
--------- ------------ ---
ORCL ARCHIVELOG YES
SQL> show user
USER is "SYS"
SQL> host rman target /
[code]....
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Oct 18, 2012
I just switched my STBDY DB to a PRIMARY DB and I am ran the following:
RMAN> CONFIGURE ARCHIVELOG DELETION POLICY TO NONE;
using target database control file instead of recovery catalog
old RMAN configuration parameters:
CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON STANDBY;
new RMAN configuration parameters:
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE;
new RMAN configuration parameters are successfully stored
ORA-00245: control file backup operation failed
RMAN-08132: WARNING: cannot update recovery area reclaimable file list
RMAN> show all;
RMAN configuration parameters for database with db_unique_name ORARZULB are:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 30 DAYS;
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
[code]....
what causes this warning and how to get rid of it?
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Feb 11, 2011
I have recently patched my catalog home to 9208 from 9204; the target database is still on 9204 but now I cannot connect to the catalog database.
oracle@mogw:TES1:/u01/app/oracle/admin/TES1/bdump
rman rcvcat rman/rman@RMANDB
Recovery Manager: Release 9.2.0.4.0 - 64bit Production
Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
[code]...
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Jun 25, 2013
While connecting to target database from stand database. I am getting below error.
calhost dbs]$ sqlplus system/oracle@proddb
SQL*Plus: Release 10.2.0.1.0 - Production on Sat Jun 22 00:18:10 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options
SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
[standdb@localhost dbs]$ rman target system/oracle@proddb auxiliary system/oracle@standdb
Recovery Manager: Release 10.2.0.1.0 - Production on Sat Jun 22 00:18:22 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00554: initialization of internal recovery manager package failed
RMAN-04005: error from target database:
ORA-01031: insufficient privileges
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Sep 30, 2012
how to duplicate it on oracle 11g xe windows 2003
i have read from documentation but getting some error.
in last
E:Documents and SettingsAdministrator>rman
Recovery Manager: Release 11.2.0.2.0 - Production on Sun Sep 30 03:03:09 2012
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
RMAN> connect auxiliary sys/12
connected to auxiliary database: XE (not mounted)
RMAN>
RMAN> DUPLICATE DATABASE TO xe
[code]...
Backup-Based Duplication Without a Target and a Recovery Catalog Connection?
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Jan 4, 2012
when i performed incomplete recovery i try to set until time but it shows RMAN-20207:until time or recovery window shoubld be before resetlogs.
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Jul 20, 2012
Backgroud info:
host server crashed.
Database was not cleanly shutdown.
Database is not in archivelog mode.
Datafiles were saved.
My goal:I want to recover the database based on the available files.
My approach:
Install new database.
ALTER DATABASE BACKUP CONTROLFILE TO TRACE.
shutdown database.
Place available dbf files in the location for new database, replacing existing files.
edit trace file to create new controlfile. Script is:
STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "newdatabase" RESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
[code]....
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Feb 24, 2012
My database is in NOARCHIVELOG mode.I took whole DB backup ( cold).Then just after half an hour I ran following script.
RMAN> RUN { RESTORE DATABASE;RECOVER DATABASE;alter database open;}
Starting restore at 24-FEB-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=133 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
[code]...
Starting recover at 24-FEB-12
using channel ORA_DISK_1
starting media recovery archived log for thread 1 with sequence 2 is already on disk as file /u01/app/oracle/oradata/PROD/redo02.log
archived log file name=/u01/app/oracle/oradata/PROD/redo02.log thread=1 sequence=2
media recovery complete, elapsed time: 00:00:01
[code]...
Why do I need to specify an option at the first place?As my redo is intact, it is not incomplete recovery and, I do not want to generate new incarnation of my database.Why oracle simply not opening my database?
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Jan 1, 2012
REGISTER DATABASE;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of register command at 01/01/2012 11:02:40
RMAN-06428: recovery catalog is not installed
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Feb 7, 2011
I have a doubt regarding the process the RMAN follows for restore and recovery of the database.
My Level 0 full backup completes on Saturdays at around 11 am after taking 8 hours (It starts at 3am).On Sunday, I ask RMAN to restore (on a different box) till Saturday 11:30 am.Then, after the restore is successful, I recover it till 11:45 am.
The recovery also goes fine and Iam able to clone to test box.
Till what time is the database restored? I assume its till 11 am since the L0 backup finishes at 11 am though I have asked it to restore till 11:30 am
During the recovery, ONLY the archives generated between Saturday 3 am and till the time i asked for recovery (Saturday 11:45 am ) are required. But, checking the recovery log file, i was surprised to see that RMAN has restored archive files starting from Friday 9:30 pm (Much before the time the Level 0 backup even started).
why does RMAN require the old archive log files.
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Dec 1, 2011
I have problem when i am trying to recover database
i am getting above error.
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Mar 22, 2012
while opening my database i got this error i already increase my db_recovery_file_dest_size but still i got this error
E:oracleproduct10.2.0db_1BIN>SET ORACLE_SID=LIVEDB
E:oracleproduct10.2.0db_1BIN>SQLPLUS
SQL*Plus: Release 10.2.0.4.0 - Production on Thu Mar 22 11:14:47 2012
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Enter user-name: SYS AS SYSDBA
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[code].....
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