How to recover a lost archive log file?
How to recover a lost archive log file? Do I need to open the database with RESETLOGS after recovery?-------No.156
I think he might rewrite the question in his own words.
I guess in the event of lost archive logs during db recovery, you have to open RESETLOGS and say goodbye to some of the data.
Similar Messages
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How to restore cold backup + archived log files
Hi,
Suppose I take a cold backup on 18th. After that I have four days of archived log files. if the database crashes on 5th day, I have to restore the 18th cold back + 4 days of archived log files. How do I restore since it is a cold backup and I cant do incomplete recovery.
can I use
Recover database ( with 18th cold backup) in mount state and apply archived logs.
PrabhathThe details of how you perform forward recovery using a cold backup depends on
1- rman or manual backup
2- using current or backup control file
3- if rman, recovery catalog or no recovery catalog
4- if full database recovered or only a few files
Each of these conditions will affect what is known to Oracle and what needs to be done. For example if you restored the entire cold backup including the control file then Oracle would see a consistent database and not need to perform recovery so you would need to startup mount and tell the database to perform recovery using a backup control file. If using rman and no recovery catalog you might need to catalog some of the archived redo logs, etc....
It is advisable to consult the Backup and Recovery manuals before attempting recovery for any new scenario.
HTH -- Mark D Powell -- -
How does one name an Archive Log file in ARC%S_%R.%T format
Hallo!I have been trying to enable Archive Log mode for the Oracle 10g database.
In OEM,I went via the links Maintenance->Recovery Settings->Media Recovery
There,a text box by the name Log Archive Filename Format requires one to name the Archive Log file in ARC%S_%R.%T format.
I have tried several times to name the Archive log e.g ARC001_001.001 but when I shutdown and restart the database instance,the error below appears
ORA-19905: log_archive_format must contain %s, %t and %r.
This error has proved impossible to rectify and I am forced to uninstall then re-install Oracle 10g.
I would like to have back-ups in archive log mode.Please give me the best way to name the Archive Log file i.e with an example name so that I can have online back-ups.
Thanks.Hi,
If you try to change the LOG_ARCHIVE_FORMAT to something other than the default %s,%t,%r, it will fail
Perform as the below steps in order to enable archive log mode
SQL>create pfile from spfile
SQL>create pfile='c:\temp\init.ora' from spfile;
SQL>created;
SQL>shutdown immediate;
edit the init.ora file by adding the following information
*.LOG_ARCHIVE_DEST_1='LOCATION=C:\db\archive1'
*.LOG_ARCHIVE_FORMAT='%t_%s_%r.dbf'
Start the DB with modified pfile.
- Pavan Kumar N
Edited by: Pavan Kumar on May 2, 2010 2:17 PM -
How to recover from corrupt redo log file in non-archived 10g db
Hello Friends,
I don't know much about recovering databases. I have a 10.2.0.2 database with corrupt redo file and I am getting following error on startup. (db is non archived and no backup) Thanks very much for any help.
Database mounted.
ORA-00368: checksum error in redo log block
ORA-00353: log corruption near block 6464 change 9979452011066 time 06/27/2009
15:46:47
ORA-00312: online log 1 thread 1: '/dbfiles/data_files/log3.dbf'
====
SQL> select Group#,members,status from v$log;
GROUP# MEMBERS STATUS
1 1 CURRENT
3 1 UNUSED
2 1 INACTIVE
==
I have tried this so far but no luck
I have tried following commands but no help.
SQL> ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3;
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
SQL> alter database open;
alter database open
ERROR at line 1:
ORA-00368: checksum error in redo log block
ORA-00353: log corruption near block 6464 change 9979452011066 time 06/27/2009
15:46:47
ORA-00312: online log 1 thread 1: '/dbfiles/data_files/log3.dbf'user652965 wrote:
Thanks very much for your help guys. I appreciate it. unfortunately none of these commands worked for me. I kept getting error on clearing logs that redo log is needed to perform recovery so it can't be cleared. So I ended up restoring from earlier snapshot of my db volume. Database is now open.
Thanks again for your input.And now, as a follow-up, at a minimum you should make sure that all redo log groups have at least 3 members. Then, if you lose a single redo log file, all you have to do is shutdown the db and copy one of the good members (of the same group as the lost member) over the lost member.
And as an additional follow-up, if you value your data you will run in archivelog mode and take regular backups of the database and archivelogs. If you fail to do this you are saying that your data is not worth saving. -
How to correct the corrupted archive log files?
Friends,
Our restore method is cloning type.
today i fired this statement(this is one is usually do for the restore) "recover database until cancel using backup controlfile"
i have 60 files in the archive folder.
it executs only 50 files when it comes to 51st file it came out and says could not copy the file.
is that particular file is corrupted?
or is there any restriction in copying no of archivelog files? i mean only 60 files like that.....
suppose if the archive file is corrupted how can i correct it?
thanks
sathyguyNow, this is the error message....
ORA-00310: archived log contains sequence 17480; sequence 17481 required
ORA-00334 archived log; '/archive2/OURDB/archive/ar0000017481.arc'i googled....and find out.....
ORA-00310 archived log contains sequence string; sequence string required
Cause: The archived log is out of sequence, probably because it is corrupted or
the wrong redo log file name was specified during recovery.
Action: Specify the correct redo log file and then retry the operation.so...from the above error messages.....i think the particular archive file(17481) is corrupted. now can i correct this corrupted archive file.
According to the above action, it says to specify the correct redo log file. if the file is not corrupted then where should i specify the redo log file's path?
thanks
sathyguy -
Current archive log got deleted, how to recover using previous archive log?
Hi
My current log sequence #819 and it is got deleted and no choice to get it back and I have previous archived logs with sequences #814 to 818.
When I starting my database it is showing that use 'MUST USE RESETLOGS OR NORESETLOGS option for database open then I used the command
SQL> ALTER DATABASE OPEN RESETLOGS;
ALTER DATABASE OPEN RESETLOGS
ERROR at line 1:
ORA-01113: file 1 needs media recovery
ORA-01110: data file 1: 'E:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSTEM01.DBF'
SQL> alter database recover;
alter database recover
ERROR at line 1:
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
SQL> alter database recover using backup controlfile;
alter database recover using backup controlfile
ERROR at line 1:
ORA-00279: change 8433746 generated at 01/15/2013 19:51:59 needed for thread 1
ORA-00289: suggestion :
E:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2013_01_16\O1_MF_1_819_
%U_.ARC
ORA-00280: change 8433746 for thread 1 is in sequence #819
now I don't have the archive log with sequence 819, I have recover from 818. please tell me how to do it?You probably should post to the correct forum too: Recovery Manager (RMAN)
cheers -
How to delete the standby archive log files in ASM?
Hi Experts
we have a realtime downstream replication that is using the a location in ASM to put the shipped logs files.
set up by
ALTER SYSTEM SET LOG_ARCHIVE_DEST_2='LOCATION=+BOBOASM/NANPUT/standbyarchs/
VALID_FOR=(STANDBY_LOGFILE,PRIMARY_ROLE)' Scope=BOTH;
What shall i do to clean up those files ?
Any procedure or script to do that?
ThanksHello Haggylein
check this out, seems to work
--- redologs used or not?
---- when purgeable we can delete it
COLUMN CONSUMER_NAME HEADING 'Capture|Process|Name' FORMAT A15
COLUMN NAME HEADING 'Archived Redo Log|File Name' FORMAT A25
COLUMN FIRST_SCN HEADING 'First SCN' FORMAT 99999999999
COLUMN NEXT_SCN HEADING 'Next SCN' FORMAT 99999999999
COLUMN PURGEABLE HEADING 'Purgeable?' FORMAT A10
SELECT r.CONSUMER_NAME,
r.NAME,
r.FIRST_SCN,
r.NEXT_SCN,
r.PURGEABLE
FROM DBA_REGISTERED_ARCHIVED_LOG r, DBA_CAPTURE c
WHERE r.CONSUMER_NAME = c.CAPTURE_NAME and PURGEABLE = 'YES';
-- Now the script
-- to be executed on the downstream database
-- generate the list of logs to be purged and executed in a ksh script
-- sqlplus "/as sysdba" @$HOME/bin/generate_list.sql
SET NEWPAGE 0
SET SPACE 0
SET LINESIZE 150
SET PAGESIZE 0
SET TERMOUT OFF
SET ECHO OFF
SET FEEDBACK OFF
SET HEADING OFF
SET MARKUP HTML OFF SPOOL OFF
spool list_purgeable_arch_redologs.ksh
SELECT 'asmcmd ls ' || r.NAME
FROM DBA_REGISTERED_ARCHIVED_LOG r, DBA_CAPTURE c
WHERE r.CONSUMER_NAME = c.CAPTURE_NAME and PURGEABLE = 'YES';
spool off
exit
# eventually we can call it from a script
# !ksh
# delete of the shipped redologs
# to be performed on node 2
# not to be used on
$HOME/bin/export ORACLE_SID=+ASM2
./list_purgeable_arch_redologs.ksh
exit -
HOW TO RECOVER A LOST FOLDER OR FILES?
I have had severe problems with my Macbook lately and I'm scared I have lost a very important folder and some files. How can I find them or recover them completely? I have searched the trash, spotlight, and finder and its missing???! please help thanks!
It can occur that some files appear to have been lost or corrupted. This can be caused due to several reasons. For instance, you could have ejected a removable device or accidentally deleted a folder that contained hidden files. No matter the reason, there is no reason to panic. Here is what to do to recover your files:
Launch MacHider and click Restore Files in the main toolbar.
Select the folder where the hidden files were originally located and click Open in the window that appears.
The file will be found and shown in the main list so that you can select to unhide it using the slider in the Inspector panel. -
Hello,
I have a understanding problem off the function of the archived log files. My Oracle 9i Database is running in ARCHIVELOG. So if the online log files are full they get backed up to 3 different locations.
However if I view now the v$archive_log view then I see all the archived log files.
So now my questions:
1. At which point does these archived log files get deleted ?
2. If they never get deleted how do I know which archived log file can I delete.
3. If I run a full hot/cold backup can I delete this archive log files?
4. Is there any other way to delete the archived log files then using rman "delete input" option ? Like is there any way to delete the archived log files form the sqplplus prompt ?
I have searched and read some articles in the net about it but it is always just about how to set up the db into archivelog mode but I was not able to find anything answering my questions.
Thank you
MarcusOut of the box, archived logs are not deleted
automatically. However, you can delete them via
RMAN. RMAN will delete them based on the set
retention policy. You can see which logs and
backups RMAN considers obsolete via the "report
obsolete" command. RMAN keeps track of logs that
are necessary for recovery, and those that can
be safely deleted.
Another option, as you have noted, is to backup
archivelogs using RMAN, with the "delete input"
option.
The best option (IMHO) is to automate deletion
of obsolete archive logs via a script. This
can be done using the "delete noprompt obsolete"
RMAN command.
I'm not aware of any SQLPlus based method to delete
logs. In any case, this would NOT be a good idea, as
RMAN would not be aware of any such deletions.
Hope this helps.
Kailash. -
How to recover the database when some of the archive log file get deleted.
I am facing a problem with Oracle database, which is related to archivelogs.
Our development database is running in archivelog mode, but we don't have backups scheduled and have no recovery catalog.
When the database was in running condition, disk got full, so some archivelogs were deleted manually.
After this they restarted the DB, and now DB is not coming up. Errors are as follows:
SQL> startup
ORACLE instance started.
Total System Global Area 1444383504 bytes
Fixed Size 731920 bytes
Variable Size 486539264 bytes
Database Buffers 956301312 bytes
Redo Buffers 811008 bytes
Database mounted.
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> alter database open resetlogs;
alter database open resetlogs
ERROR at line 1:
ORA-01113: file 1 needs media recovery
ORA-01110: data file 1: '/export/home/oracle/dev/ADVFRW/ADVFRW.system'
SQL> recover datafile '/export/home/oracle/dev/ADVFRW/ADVFRW.system'
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
SQL> recover database using backup controlfile;
ORA-00279: change 215548705 generated at 09/02/2008 17:06:10 needed for thread
1
ORA-00289: suggestion :
/export/home/oracle/dev/ADVFRW/ADVFRW.archivelog1/LOG_ADVFRW_1107_1.ARC
ORA-00280: change 215548705 for thread 1 is in sequence #1107
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/export/home/oracle/dev/ADVFRW/ADVFRW.archivelog1/LOG_ADVFRW_1107_1.ARC
ORA-00308: cannot open archived log
'/export/home/oracle/dev/ADVFRW/ADVFRW.archivelog1/LOG_ADVFRW_1107_1.ARC'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
CANCEL
Media recovery cancelled.
SQL>
1. How to recover the database and bring it online
Any help will be highly appreciated.
With Regards
Hemant Joshi
Edited by: hem_Kec on Sep 7, 2008 9:07 AMHi,
Archive log files are the copies of redolog files.As redo log files are circularly overwritten,oracle generates archive log file of the corresponding redo logfiles being overwritten.So if you have a backup that dates back to 10 am in the morning and if your database creashed at 3 pm,you cannot use the redo log files alone as they have incomplete information.To completely recover the database upto 3 pm,you need archive log files generated between 10 am to 3 pm. In your case since you are missing one archive log file,you cannot perform complete recovery and hence would suffer data loss. -
How to Recover database from old backup and full archive log file
Hi Oracle expert!
I met problem when restore my oracle database.
In my case:
- My database version: 10.2.0.2
- I have a database full backup (01-Nov)
- I have all Archived log file from (01-Nov -> 05-Nov)
- My database drop in 05-Nov with disk error (no datafile, no redo..).
- I have no any RMAN backup from (01-Nov -> 05-Nov)
How can i restore my database to 05-Nov?
Thanksuser10280724 wrote:
Hi Chinar.
When i used RMAN flow as your step, but i met the problem!
- After recover database i select sequence#, applied from v$archived_log;
--> it apply newest archived log that i had.
- but when I select Data from table created between 01-Nov to 05-Nov, it not found!
Not the same way the step:
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE UNTIL CANCEL?
It apply newest the same archived log i had table created between 01-Nov to 05-Nov.
How can i do with RMAN to recover my table?That is not possible,if your all available archive logs applied using rman or through sqlplus(recover database using backup controlfile until cancel) and one of these logs contain your table then there are not any problems.So there are not any difference between recovery using rman and user managed(using sqlplus),but there main matter is applying all archive logs.So first check through rman list copy of archivelog all or list backup of archivelog all and identify there in rman repository is any information or not about these logs. -
How to find thead 2 archive log when i recover from 2-node RAC to single
I backup 2-ndoe RAC and restore to single - node
Control file created.
SQL> recover database iuckup controlfile
SQL> recover database using backup controlfIle;
ORA-00279: change 12100176131169 generated at 07/06/2013 16:36:57 needed for
thread 1
ORA-00289: suggestion : /arch/hop1_566085708_1_212692.dat -- Oracle suggest
ORA-00280: change 12100176131169 for thread 1 is in sequence #212692
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
arch/sch1_566085708_1_212692.dat --- I input
ORA-00279: change 12100176131169 generated at needed for thread 2
==> Oracle didn't suggest thread 2 archive log file/
How can I find ?You have to query V$ARCHIVED_LOG for THREAD# 2 on the source database to find the first archivelog where 12100176131169 is less than the NEXT_CHANGE#
select SEQEUNCE# from V$ARCHIVED_LOG where THREAD#=2 and 12100176131169 between FIRST_CHANGE# and NEXT_CHANGE#
Once you provide the Sequence# and file name for the first Thread 2 file, the RECOVER command will automatically generate the expected file name for the subsequent archivelogs (of both threads).
Hemant K Chitale -
How to delete the data in archived log files
hi
how can i delete the enteries in archived log files. and what is the disadvantage of deleting archived log enteries.There is no documented way to delete data stored in archived log files: you can only remove the archived log files if needed.
-
How to remove archive log files from ASM managed 11g R2 database?
Hi,
I am planning to automate deletion of older archive log files from my 11g R2 Production instance which is ASM managed.
Also want to remove the archive log files files from standby database.
Please provide your inputs on how can I remove the older archive log files.
Regards,
AvinashGreetings
Did you check RMAN,
RMAN>show all;
CONFIGURE RETENTION POLICY . . . .
CONFIGURE ARCHIVELOG DELETION POLICY TO [CLEAR | NONE | APPLIED ON STANDBY];
DELETE NOPROMPT EXPIRED ARCHIVELOG ALL;
DELETE NOPROMPT ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-10';
This will be part of your RMAN Backup scripts/process
Check the urls below:
11gRel2:
http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmmaint.htm#BRADV90079
http://download.oracle.com/docs/cd/E11882_01/backup.112/e10642/rcmmaint.htm#BRADV89634
10g:
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14193/toc.htm#sthref45
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/rcmconc1.htm#i1008093
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/maint003.htm#sthref712
Regards & Thanks
BN -
How to delete archive log files from ASM through Grid Control
Hi
Anybody suggest me how to delete archive log files from ASM through Grid Control.
ThanksIt is important to specify both, the oracle version and os version when posting, so confusions can be avoided.
In this particular case, since you are referring to asm and grid control you could be talking about either 10gR1, 10gR2 or 11gR1; but I strongly suggest you to avoid us to be guessing. In either case, you sould go to the maintenance tab of the target database and program a scheduled 'delete noprompt obsolete;' procedure. This will purge the information stored at the Flash recovery area, which I assume you have declared inside the ASM.
~ Madrid
http://hrivera99.blogspot.com/
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