Simulating Control File Damage
Feb 16, 2012
I am trying to simulate a damage in my control files
$ORACLE_BASE/oradata/orcl/control01.ctl and $ORACLE_BASE/flash_recovery_area/orcl/control02.ctl
So I moved these files to another folder different of origin with the database online (in linux, I tried to do it in win7, but not works)!
And for my surprise the DML and DDL commands still working! The Oracle docs said:
QUOTE If any of the control files become unavailable during database operation, the instance becomes inoperable and should be aborted.
[URL] ....
What " the instance becomes inoperable" in Oracle Docs means?
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Jun 6, 2012
I did a hot back up like this :
--check that it is in archivelog mode
SQL> archive log list
-- the data files that will need to be backup by OS command
SQL> select sum(bytes) from dba_data_files;
SQL> select name from v$datafile;
-- note archivelog sequence before starting the hot backup (need to back the archivelog generated during the backup)
SQL> select thread#, max (sequence#) from v$log group by thread# order by thread#;
-- begin the backup
SQL> alter database begin backup;
-- use OS command to copy the datafiles
-- remember to end the backup mode
SQL> alter database end backup;
-- archive the current online redo log files
SQL> alter system archive log current;
-- REMEBER to note the MAXIMM online-redo sequence number
select thread#, max (sequence#)from v$log group by thread# order by thread#;
-- backup the control files
SQL> alter database backup controlfile to '/oradump/hbackup/O11R2/controlbk.ctl' reuse;
-- backup any archive-redo logd generated during the backup
-- select from the v$archived_log mode
-- anything thing that appear under this view is safe to backup as long you don't backup the current archive log file that is being written to.simulated a scenario, if 1 of my multiplex control is damage due to media failure ( i just delete it, seem like i got to shutdown first before i can delete it, using window bases oracle, not too sure linux allow you to delete the control file like this)
To what i understand one can restore a missing control file if you have multiplex it. so I did this :
ORACLE instance shut down.
SQL> startup
ORACLE instance started.
-- while it is being down, i use OS command to copy a good copy of the control file to the missing controlfile location + name.
-- startup
Total System Global Area 535662592 bytes
Fixed Size 1384760 bytes
Variable Size 243273416 bytes
Database Buffers 285212672 bytes
Redo Buffers 5791744 bytes
ORA-00214: control file 'C:ORACLEXEAPPORACLEORADATAXERENAME_CONTROL01.DBF' version 9539
inconsistent with file 'C:ORACLEXEAPPORACLEORADATAXERENAME_CONTROL.DBF' version 9533I google abit and it mention ,
[URL]........
>
You have tried to move one or more copies of control file at the different location when Oracle database was up and running.
You have tried to restore from database backup but your backup has not taken properly. It may taken when database is up and running.
Your database or system got corrupt/damaged during updation was in process.
>
is the error i got because of 1 of the reason above.
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May 1, 2011
The logic between Oracle and MySQL's functionality is reversed in a way that ctx_rule will allow for logical operators within the columns index, allowing for plain text to be passed without any logic e.g
Oracle:
usa OR united states of america AND michigan
MySQL:
usa united state of america michigan
and MySQL expects it before hand.
In the above example, I have to figure out the operator logic before sending the credentials to MySQL e.g.
MATCH (location_rule) AGAINST ('+usa +"united states of america" +michigan' IN BOOLEAN MODE) AS score
I don't want or have the capability of figuring out the operators before hand with the user input
How can I mimic oracles rule index with MySQL?
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Aug 29, 2013
I have to load data file into a table. And the requirement is as below:
Input Data:
1234|20130815|20130822|This is a test, this is the the part
3456|20130823|20130809|This is a test
3456|20130823|20130809|This is a test
3456|20130823|20130809|This is a test
3456|20130823|20130809|Siva 1234
The data should be inserted only in two rows as below:
When Value in first 3 fields is same, 4th field should be appended to the existing value in table.
1234|20130815|20130822|This is a test, this is the the part
3456|20130823|20130809|This is a testThis is a testThis is a testSiva 1234
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Feb 21, 2011
is there any way you can get the name of the file loading the table in a control file? i have a table with a column called source_file, and need to populate it during the load.
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Jul 24, 2011
In my system all my control files get corrupted.
FYI,I have taken control file backup and DB backup also 6 hour before the control file get corrupted,then there are quite lot of DB structure change, so Now how to recover my control file with the upto time DB state , since the backup was taken for control file 6 hour before the file get corrupted, now how do I revery the DB/control file, step by step with syntax as well.
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Oct 12, 2012
I know this question must have been asked several time. I just want to know the many ways in which we can have a DB up and running even if we do not have any backup of control file not even the trace of the same.
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Feb 14, 2013
I am just looking to my control file that I have. I have managed to successfully get my control file to load data into the required tables but just for my learning I was trying to amend the when clause with an and condition but keep getting an error.
My code:
OPTIONS (DIRECT=TRUE, ERRORS=0, SKIP=1)
load data
infile 'A:/My Files/Feeds/20130211/data_summary_1_20131214.txt' "STR '
'"
APPEND
into table I_DATA_1
WHEN (RID <> 'RID')
fields terminated by "~|~" optionally enclosed by '"'
TRAILING NULLCOLS
(
RID,
S_TIMESTAMP timestamp 'DD-MON-RR HH:MI:SS.FF3 PM'
)
the above code works perfectly but if i change the following line:
WHEN (RID <> 'RID' AND 'S_TIMESTAMP' IS NOT NULL)than this gives me an error.
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Mar 12, 2012
I am receiving errors when trying to load the control file. The errors are as follows:
SQL*Loader-500 Unable to open file (homework.ctl)
SQL*Loader-553 file not found
SQL*Loader-559 SYstem error: The system cannot find the file specified.
My control file is located directly in the C drive (C:\homework.ctl). The control file contains the following
LOAD DATA INFILE 'c:\country.dat'
APPEND INTO TABLE homework
fields terminated by ',' optionally encloded by '"'
(country, month, day)
WHEN (month='April')
On the command line, I am entering:
sqlldr system/password control=homework.ctl
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Sep 13, 2010
In a control file, the code is as follows:
load data
infile 'C:\Documents and Settings\xxxxx\Desktop\abc.txt'
APPEND
PRESERVE BLANKS
INTO TABLE table1
[code]...
When I run the above control file in sqlldr, I'm getting the error as
Record 1: Rejected - Error on table table1, column column3.
ORA-01481: invalid number format model
In the table the column3 data type is NUMBER(6,2).: The column size in table is 6 and position of column3 in control file is only 4. Also if possible let me know how the same data (send me 2 dummy records) which exactly works for the above control file especially for column3 where decimal number comes in the flat file.
For generating the flat file, for column3, i'm using LPAD(:value,4,0) in the select query column list.
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Apr 1, 2011
How can we add another control file to DBOG database? I need to clarify all the steps during this process.
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Apr 8, 2012
By mistakenly Oradata file has been deleted and there is I have not any backup when we Startup the database then we get an Error as
ORA-00205: error in identifying control file, check alert log for more info
Now I want to create controlfile as
Microsoft Windows [Version 6.1.7600]
Copyright © 2009 Microsoft Corporation. All rights reserved.
C:\Users\SARASWATIMAA>SQLPLUS
SQL*Plus: Release 10.2.0.1.0 - Production on Sun Apr 8 23:15:09 2012
Copyright © 1982, 2005, Oracle. All rights reserved.
Enter user-name: SYS AS SYSDBA
Enter password:
[code]...
where is My Mistake in Creating Cotrolfile..I want to know that in which condition we use "SET" or "REUSE" in Create Controlfile.
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Sep 11, 2011
I have a problem with my control file [URL].........
What I did, I have a duplicate of the database with the invalid control file, let's call it DUMDB. I am using my control file and no recovery-catalog-db.
I recreated the control file. Now everything is working fine, new backups can be taken, restores can be made. I just need to restore a backup tagged with "LASTDEV". The control file for this backup is the invalid one. So I need a restore WITHOUT restoring the control file.
I did:
CODERMAN> catalog backuppiece '/u03/flash_recovery_area/DUMDB/backupset/o1_mf_nnndf_LASTDEV_75fmkllw_.bkp';
cataloged backup piece
backup piece handle=/u03/flash_recovery_area/DUMDB/backupset/o1_mf_nnndf_LASTDEV_75fmkllw_.bkp RECID=1 STAMP=761604017
CODERMAN> list backup;
using target database control file instead of recovery catalog
List of Backup Sets
===================
BS Key Type LV Size Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
1 Full 2.77G DISK 00:00:00 26-AUG-11
BP Key: 1 Status: AVAILABLE Compressed: YES Tag: LASTDEV
Piece Name: /u03/flash_recovery_area/DUMDB/backupset/o1_mf_nnndf_LASTDEV_75fmkllw_.bkp
List of Datafiles in backup set 1
===========================
File LV Type Ckp SCN Ckp Time Name
---- -- ---- ---------- --------- ----
1 Full 63166185 26-AUG-11 /u02/oradata/dumdb/system01.dbf
2 Full 63166185 26-AUG-11 /u02/oradata/dumdb/sysaux01.dbf
3 Full 63166185 26-AUG-11 /u02/oradata/dumdb/undotbs01.dbf
5 Full 63166185 26-AUG-11 /u02/oradata/dumdb/stdtbs01.dbf
6 Full 63166185 26-AUG-11 /u02/oradata/dumdb/users.dbf
CODERMAN> crosscheck backupset 1;
using channel ORA_DISK_1
crosschecked backup piece: found to be 'AVAILABLE'
backup piece handle=/u03/flash_recovery_area/DUMDB/backupset/o1_mf_nnndf_LASTDEV_75fmkllw_.bkp RECID=1 STAMP=761603187
Crosschecked 1 objects
CODERMAN> RESTORE DATABASE FROM TAG='LASTDEV';
Starting restore at 11-SEP-11
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=130 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 09/11/2011 20:32:25
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 6 found to restore
RMAN-06023: no backup or copy of datafile 5 found to restore
RMAN-06023: no backup or copy of datafile 3 found to restore
RMAN-06023: no backup or copy of datafile 2 found to restore
RMAN-06023: no backup or copy of datafile 1 found to restore
This is exactly the same message if you do "RESTORE DATABASE FROM TAG='NONEXISTENTDUMMYTAGXXXX'"
Why can the data files not be found even if they are listed in the backup?
I am on 11.2.0.2.0 on Linux64.
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Mar 2, 2011
We have a database that is accessed by ArcSDE, a product to modify maps. It uses BLOBs to store those maps.
We ran a load on the server and the response time was slow. By running the following query:
select event, total_waits, time_waited, avg_ms, round(ratio_to_report(time_waited) over () * 100) percent
from (select substr(event, 1, 30) event, total_waits, time_waited, round(time_waited_micro / total_waits / 1000, 2) avg_ms
from v$system_event
where wait_class in ('System I/O') union
select 'CPU' event, NULL, value, NULL
from v$sysstat
where statistic# = 12
order by 3 desc)
where rownum <= 10;
I get
EVENT TOTAL_WAITS TIME_WAITED AVG_MS PERCENT
--------------------------- -------------- ------------- -------- ---------
control file parallel write 127187 6354909 499.65 70
CPU 988274 11
db file parallel write 20461 886442 433.23 10
log file parallel write 14987 870672 580.95 10
log archive I/O 1557 18094 116.21 0
control file single write 149 10590 710.71 0
control file sequential read 136502 5219 .38 0
log file single write 56 2511 448.41 0
log file sequential read 489 492 10.05 0
BUG: 733426 says to change the event="10359 trace name context forever, level 1"
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Nov 30, 2004
I am cloning a database from a cold backup in archivelog mode using the control file script but failes:
STARTUP NOMOUNT
CREATE CONTROLFILE DATABASE PROD NORESETLOGS ARCHIVELOG
:
:
:
ALTER DATABASE OPEN;
ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\ORADATA\PROD\TEMP01.DBF'
[code]...
Tried again with RESETLOGS:
STARTUP NOMOUNT
CREATE CONTROLFILE DATABASE PROD RESETLOGS ARCHIVELOG
:
ALTER DATABASE OPEN RESETLOGS
*
ERROR at line 1:
ORA-00344: unable to re-create online log 'D:\ORADATA\PROD\REDO01B.ORA'
ORA-27040: skgfrcre: create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 5) Access is denied.
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Aug 29, 2010
I want to use rman to restore all my control files, I just did a level 0 incremental backup and ran the following script.
rman <<EOF
connect target sys/sys@GOLD_AUX
connect catalog rman/rman@GOLD_CAT
RUN
{
STARTUP FORCE NOMOUNT;
RESTORE CONTROLFILE;
ALTER DATABASE MOUNT;
ALTER DATABASE OPEN RESETLOGS;
}
EOF
My control files seem to be put back in the correct spot and suggest a way I can restore only my control files and have everything in sync with my datafiles.
end of out from rman script
====================
channel ORA_DISK_1: restore complete, elapsed time: 00:00:04
output filename=/oracle/data/aux/control01.ctl
output filename=/oracle/data/aux/control02.ctl
output filename=/oracle/data/aux/control03.ctl
Finished restore at 29-AUG-10
[code]...
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May 13, 2011
I deleted the control file using $rm control01.ctl. But i perform the back up
rman> backup incremental level 0 database;
i have no any backup
so how can i recover the my lost control file to connect with oracle instance.
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Oct 18, 2010
Is it possible to use where clause to discard one of the item which is not able to fit into column because of the length constraint.
Example:
1.Remove first digit from the item_ID where ITEM_ID IN (12345)
2.Do not load data WHERE ITEM_ID IN (12345)
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Jul 12, 2012
I am trying to create a new controlfile. I used "alter database backup controlfile to trace;" and then I copied and pasted the contents of the trace file into the .sql file. My sql script is
CREATE CONTROLFILE SET DATABASE "FIVESTAR" RESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
[code]....
Actually, the name of my database was 'STAR' and I changed it to "FIVESTAR" int this .sql script. Now when I run this script with SQL> @ <path of my sql script>, it gives me the following errors:
ERROR at line 1:
ORA-01503: CREATE CONTROLFILE failed
ORA-01504: database name 'FIVESTAR' does not match parameter db_name 'STAR'
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Jun 12, 2012
I can not run the control file treace file,why?
[oracle@hxl oradata_bak]$ more run_sql.sql
CREATE CONTROLFILE REUSE DATABASE "ORACL" RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
[code]...
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Mar 19, 2010
I'm having a problem with SQL loader and the control file. I want to load a delimited file. The script will eventually be automated where the file name is passed in to the script, it's not a static name.
It's a simple SQL loader Unix script that I have created as follows
Unix file called test_load
# Auto Load
#
#
export data_file=/dev/test_$1$2.csv;
export ORACLE_HOME=/u01/oracle/product/10.2.0;
export ORACLE_SID=XXX;
export PATH=$PATH:$ORACLE_HOME/bin;
sqlldr userid=XXX/XXX data=$data_file
control=/dev/cntrl/test.ctl
errors=99999
bad=/dev/bad/test_$1$2_$$.bad
log=/dev/logs/test_$1$2_$$.log
the top of my control file is as follows
load data
truncate
into table test
fields terminated by "|"
when record_type = 'AA'
(
running at the prompt ./test_load myload 20100319
The following error occurs
SQL*Loader-350: Syntax error at line 5.
Expecting "(", found keyword when.
when record_type = 'AA'
^
I believe the format of my control file is correct but for some reason it won't load.
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Sep 27, 2013
I took database backup without "change the controlfile configuration autobackup on".. and unfortunately i deleted my controlfile. Then I tried to restore my controlfile but it gives error,now how can i restore controlfile is there any other way to restore controlfile with aautobackup..
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Nov 25, 2011
I was doing some R&D on my test machine trying to understand how controlfile works. I started up my db and then deleted (renamed)the controlfiles at OS level. I was expecting the db to shutdown. But it dint. Moreover when i queried select name from v$controlfile; it was still reflecting the old controlfile names. To check if it was still functioning, i created a new tablespace with one file and it also got created without any error.
What i dint understand is how could the db still be running when the control file was'nt there and new tablespace and datafile get created? As i understand, whenever a new file is created, an entry is made in the control file. But when control file dint exist where was the data about new tablespace and datafile written?
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Aug 19, 2012
I have RMAN backup on TAPE. I need to restore control file for particular date on another host. How do I restore control file to new host for particular date?
EXAMPLE:
4949 Full 11.25M SBT_TAPE 00:01:09 06-AUG-12
BP Key: 4949 Status: AVAILABLE Compressed: NO Tag: TAG20120806T223455
Handle: COTSPRD_c-4007601229-20120806-00 Media: 030256
SPFILE Included: Modification time: 28-MAR-12
SPFILE db_unique_name: COTSPRD
Control File Included: Ckp SCN: 237324864 Ckp time: 06-AUG-12
Can I rrun command like :
RESTORE CONTROLFILE FROM TAG 'TAG20120806T223455;
I need to clone from tape to another server for particular date.
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May 9, 2013
I encountered error ORA-00338 while performing incomplete database recovery:
ORA-00283: recovery session canceled due to errors
ORA-00338: log 3 of thread 1 is more recent than control file
ORA-00312: online log 3 thread 1: '+DG_REDO/dbase/onlinelog/group_3.267.814820795'
Recovery Manager complete.
I performed this recovery on oracle 10g, ASM database.
1. What are possible causes behind this error ORA-00338 ?
2. This error occurs at the start of media recovery, while RMAN is applying archived logs. So does RMAN apply "online REDO" logs after applying "archived" logs required for recovery or before them ?
3. How does rman come to know that online log 3 is more recent than control file ? How can I get scn of online log & control file in my environment ?
Following are few details related to checkpoint scn/change# info. I found in my environment..Before recovery:
view
v$datafile: 642935
v$datafile_header: 642935
v$database: 642935
v$log: 640956
After unsuccessful recovery (ORA 338 :( )
v$datafile: 640917
v$datafile_header: 640056
v$database: 640906
v$log: 640906
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Dec 2, 2011
I've recently moved jobs and am doing a lot of the normal things getting familiar with my new company's databases.I was checking through our production backup logs and came across something that looks a little funny. From the last two days backups, I see:
select completion_time, marked_corrupt, media_corrupt, logically_corrupt
from v$backup_datafile
where controlfile_type = 'B'
order by completion_time desc
COMPLETION_TIME MARKED_CORRUPT MEDIA_CORRUPT LOGICALLY_CORRUPT
01/12/2011 11:27:252011 1201 2
01/12/2011 11:26:180 0 0
01/12/2011 11:25:242011 1201 1
01/12/2011 11:15:562011 1201 0
01/12/2011 01:40:100 0 0
30/11/2011 11:23:482011 1130 2
30/11/2011 11:22:440 0 0
30/11/2011 11:21:562011 1130 1
30/11/2011 11:13:002011 1130 0
30/11/2011 01:41:010 0 0
The 01:40 record will come from our nightly command:
BACKUP INCREMENTAL LEVEL=0 FILESPERSET=20 FORMAT 'full_%d_%t_%s_%p'
DATABASE INCLUDE CURRENT CONTROLFILE
The 11AM records will come from the command:
BACKUP INCREMENTAL LEVEL=0 FORMAT 'ctl_%t_%s_%p' CURRENT CONTROLFILE;
(I know backups shouldn't still be running at 11am and we don't need level 0 backups every night, that's a seperate issue I'll be addressing! ) I see there's been a similar entry here in v$backup_datafile for all backups that there's records for. The database is up and running just fine. There are no unusual errors being reported by the database in OEM or the alert log.I tried looking at both our control files (yes, should have 3 - something else I've listed to change!) with dbverify which showed no issues - though I'm not sure if this is designed to work with control files.
If so, how could I confirm whether it's an issue with a specific controlfile (I'm assuming it's not an issue with the backup to tape itself, as it's reporting the same corruption every day)?I'd obviously like to diagnose this now while the db is up and running, rather than at 4am some morning during a crash and finding out my backup control files are no good!
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Jun 3, 2010
I am not able to create control file from scrip . it showing following error
ORA-01081: cannot start already-running ORACLE - shut it down first
CHARACTER SET WE8ISO8859P1
*
ERROR at line 19:
ORA-02236: invalid file name
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Apr 24, 2012
I have a csv file extracted from mainframe which has to be loaded into oracle using sqlldr utility.The numbers are in the format +0000003333, -0000003232.44 etc
I have to convert it to 3333 and -3232.44 and insert into the table.
I have used syntax like
Load file....append into table (t_num expression "to_number(':tnum,'99999.999')")
This gives me an invalid number error.
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Dec 7, 2012
We're running 10.2.0.4 Database on AIX with no catalog Database.We keep all the backup info in controlfiles only.When we do that backup, we're able to successfully back it up (including archivelogs). But I'm unable to find any records in the controlfiles.
SQL> select * from V$BACKUP_SET;
no rows selected
and
SQL> sho parameter control
NAME TYPE VALUE
------------------------------------ ------------------------------
control_file_record_keep_time integer 14
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Jul 17, 2012
SQL> select checkpoint_change#,controlfile_change# from v$database;
CHECKPOINT_CHANGE# CONTROLFILE_CHANGE#
------------------ -------------------
203454 204955
what's the difference between checkpoint_change# and controlfile_change#.
what's the checkpoint_change# use for ? does it use for recover ?
what's the controlfile_change# use for ?
when the controlfile_change# will be increase ?
SQL> select controlfile_sequence# from v$database;
CONTROLFILE_SEQUENCE#
---------------------
293
Qs.) what is controlfile_sequence# ?
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