Backup & Recovery :: Data Missed From Table
Jul 18, 2012
Yesterday my colleague noticed that, the complete data (1 year) got missed out from a table and the data is available only from last friday.
And then we restroed the data from the backup.
Now we have been asked to find out who has deleted or truncated the data? But in the database, audit is enabled only to log sys operations.
So is there any way to find who ran the delete or truncate command on this DCA_CLA_BATCH table on friday?
SQL> show parameter audit
NAME TYPE VALUE
------------------------------------ -------------------------------- ------------------------------
audit_file_dest string /dborafiles/edcap/edcapd/adump
audit_sys_operations boolean TRUE
audit_syslog_level string
audit_trail string OS
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Jan 30, 2012
Today we have taken a backup of the Live database, due to some issue, it got deleted before applying into the Disaster Recovery Location.
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May 24, 2012
Our client has this scenario:May 23th 4:00 PM a user truncate a critical table. The customer need to recover the data before truncate.
The recover materials list like this:
1. A cold backup of this database at May 1th.
2. The archive log except May 1th ~ May 15th.
3. Every day exp at 00:30 and 12:00.
Is there any way to recover the data before truncate table with these material?
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Mar 23, 2012
I delete some of the data from a table unfortunately and make commit on that on my production server.
getting back my all data of this table only of last 15 minutes.
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Jan 26, 2012
I have an oracle autoback of controlfile and spfile. I am trying to restore the production database using this backup, into a new server with a different directory structure.
I have completed the following steps in the restore process.
1. Creating a pfile from spfile
2. Changing the the location of cdump, udump, bdump and the control files ( there are three )
3. Then creating a spfile from this pfile
I am stuck on the next step where to rename all the datafiles and tempfile and restore the database. Following is what I did.
After mounting the database in RMAN, tried to run the following.
RMAN> run
2> {
3> allocate channel c1 device type disk
4> ;
5> @/home/oracle/rman_scripts/newloc.rman
6> SET NEWNAME FOR DATAFILE 1 TO '/u02/oradata/dorian/system01.dbf';
7> SET NEWNAME FOR DATAFILE 2 TO '/u02/oradata/dorian/undotbs01.dbf';
8> SET NEWNAME FOR DATAFILE 3 TO '/u02/oradata/dorian/sysaux01.dbf';
9> SET NEWNAME FOR DATAFILE 4 TO '/u02/oradata/dorian/users01.dbf';
[code]....
I am getting the following error message.
Starting restore at 25-JAN-2012 21:26:48
released channel: c1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 01/25/2012 21:26:49
RMAN-06026: some targets not found - aborting restore
RMAN-06100: no channel to restore a backup or copy of datafile 30
RMAN-06100: no channel to restore a backup or copy of datafile 29
RMAN-06100: no channel to restore a backup or copy of datafile 28
[code]....
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Feb 9, 2011
Is it possible to restore dropped table OR wrongly updated table using RMAN backup.
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Dec 29, 2011
I am not able to take backup of table which is partitioned.Whenever i start the backup it was hanging with wait event "asynch descriptor resize", so I tried to create another table using original table ( like create table BASE_TABLE AS SELECT * FROM BASE_TABLE), but it is also hanging with same wait event.
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Feb 2, 2011
We are using HP data Protector as oracle database backup tools.but we are facing below error. But we are able to login to the database through same user.
BR0301E SQL error -1033 at location BrDbConnect-2, SQL statement:
'CONNECT system/********'
ORA-01033: ORACLE initialization or shutdown in progress
BR0310E Connect to database instance ARP failed
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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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Dec 28, 2012
db can only be opened if all the datafile and controlfiles are synchronize.I wonder if db crash and we dont have any kind of backup. is there some way to synchronize the control file with the datafile?....any way.db is not idle either when crashes we can manage data lose.just want our database open
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Feb 24, 2013
My server hard disc crashed yesterday and i don't have any backups.
I am able to recover the .dbf files by using a recovery tool.
is it possible to use this .dbf files into new server and recover my data.
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May 19, 2008
Replication happens across the servers to make sure that the data is the same (synchronized). If one of the server crashes and later recovers, does it need to repair the data to keep them in sync with the other servers?
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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$backup_set and the "Keep" is "No" and "Keep until" is empty.
The only thing I can think of, is the settings of "CONTROL_FILE_RECORD_KEEP_TIME". It is marked "7" in the Oracle, which is less than the retention. But I suppose this only causes the backup not deleted, but NOT be deleted earlier.
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Jan 9, 2013
how to take backup and recover of oracle database and which method is best for to protect our data from lost
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May 20, 2013
I am the only DBA in my company and Oracle just crashed on me. The data is corrupted as well as the data on my backup! Is there ANY way I can get the information back?
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May 18, 2013
It seems that Oracle does not use XOR to calculate the checksum of data blocks any more. What is the new checksum algorithm?
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Jun 24, 2013
I am trying to backup my entire database's files :
[oracle@testing-oracle-1 ~]$ rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Mon Jun 24 16:09:54 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1341263457)
RMAN> list backup;
using target database control file instead of recovery catalog specification does not match any backup in the repository
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters are successfully stored
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP FORMAT
FOR DEVICE TYPE DISK TO '/u01/app/oracle/backupsets/control_files/cf_%F.BCKP';2>
[code]....
I see that a backup set was created to "/u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_06_24/" , in spite of my specification.
So I asked RMAN to list all the backups I have:
RMAN> list backup;
List of Backup Sets
===================
BS Key Size Device Type Elapsed Time Completion Time
------- ---------- ----------- ------------ ---------------
1 41.14M DISK 00:00:00 24-JUN-13
BP Key: 1 Status: AVAILABLE Compressed: NO Tag: TAG20130624T161025
Piece Name: /u01/app/oracle/backupsets/818957425_1_%r.BCKP
[code]....
Here I see that 4 backup sets have been created.The backup sets 1 & 3 containing the archived redo logs (818957425_1_%r.BCKP and 818957451_3_%r.BCKP) are placed as I wanted in /u01/app/oracle/backupsets/ dir.
The file containing the Control File and Spfile (cf_c-1341263457-20130624-00.BCKP) is placed as I wanted in /u01/app/oracle/backupsets/control_files/ dir.However, The backup set file containing the data files(o1_mf_nnnd0_TAG20130624T161026_8wjkb2tg_.bkp) is placed under the directory /u01/app/oracle/flash_recovery_area/ORCL/backupset/2013_06_24/ ,and I don't understand why.
When I backup my database without the archived redo logs - it is saved correctly:
RMAN>
RMAN> delete backup;
using channel ORA_DISK_1
List of Backup Pieces
BP Key BS Key Pc# Cp# Status Device Type Piece Name
[code]....
1. Why aren't my data files backed up to the location I specified when I backup using PLUS ARCHIVELOG syntax?
2. Why are my redo logs saved to two different backup sets and not just one?
3. Is there a way to combine backup of all files (data files, control file, spfile, redo logs & arch redo's) in one backup set, one file?
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Mar 7, 2012
I want to take backup of selected data from tables of a schema (as huge data, that is not used, causing slow query performance) I planned to create a seprate backup schema and tablespace to store the data from these tables. Then write procedures that can move the data to and fro among table of those schema. And create partitioned index on those backup tables.
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Jun 11, 2012
How to recover a table which truncate incautiously?
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Apr 20, 2011
One of our programmer/user accidentally truncated 2 tables in production. The dB is in NO ARCHIVELOG MODE.
How can we restore records of the 2 tables?
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Jan 14, 2013
My DBA restored a table (which is already exists in the DB) so how can I found that current table is restored one?
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Dec 29, 2011
How i can recover my drop table..i use user managed backup concept after dropping table i cant recover my table..how i use step that my dropped table recover.
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Jul 1, 2011
I have a 10G Express system running. I Have 2 tablespaces in production. WHen taking backup, it terminates unsuccessfully saying system01.dbf is damaged. The application works fine and no data loss is found through the application interface.
So can I shift the data to a new server using the dbf files of the tablespaces in use?
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Nov 21, 2012
What i have to do for this error:
ORA-01578: ORACLE data block corrupted (file # 3, block # 42348)
ORA-01110: data file 3: '+DGMETA/metadb/datafile/sysaux.257.783871811'
Wed Nov 21 09:30:00 2012
Corrupt Block Found
TSN = 2, TSNAME = SYSAUX
RFN = 3, BLK = 42348, RDBA = 12625260
OBJN = 50439, OBJD = 50439, OBJECT = MGMT_STRING_METRIC_HISTORY_PK, SUB
OBJECT = SEGMENT OWNER = SYSMAN, SEGMENT TYPE = Index Segment
Database version is :- Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bi
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Jun 24, 2013
We are facing block corruption error and it's refer to system datafile (SYSTEM01.DBF).Below is the script through it, we can come to know about the extent.
select segment_name, segment_type from dba_extents
where file_id=1 and 134144 between block_id and block_id+blocks-1;
select owner,index_name,index_type, table_name from dba_indexes
where index_name='I_CDEF3';
How to resolve the problem as it is related to system datafile? We tried to drop the index but system is not allowing to do.
ORA-00701 - object necessary for warmstarting database cannot be altered.
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Feb 17, 2011
I have a database "BD001" for example, inside got 90 schemes, each one has two tablespaces, see below script I use to create:
CREATE TABLESPACE TS_F_ORA9_027_DAT NOLOGGING DATAFILE
'E: DataBases ORACLE 92 DAT TS_F_ORA9_027_DAT.ora' SIZE 5M REUSE ON AUTOEXTEND
NEXT 10240K MAXSIZE UNLIMITED EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT
AUTO;
[code]....
I have the dmp this scheme "F_ORA9_027" but have no way to restore it onceI can not connect to the service.
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Aug 3, 2012
I am trying to calculate the compressed size of backup of my database by excluding table space ( and all the tables in that table space).
I know how to calculate the size of particular user DB size.
select sum(bytes/1024/1024)"size" from dba_segments where owner='ABC';
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Jul 10, 2012
Is this possible to take the dump of a huge table , say 500gb, into multiple files and then import it in other database? if yes how can we do it?
Note that it is a single table with 500GB of size.
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Jan 3, 2012
how i can recover my drop table using until time in rman scenario.
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