Deleted redo log files in test

hi,
i was working in my test environment.
by mistake all the redo logs were deleted.(all members)
now the database is not starting.
please give sugestion as how to open the database again.
Regards

Was the DB shutdown when it was deleted?:NO
SQL> recover database until cancel;
ORA-00279: change 236004 generated at 01/04/2010 21:03:06 needed for thread 1
ORA-00289: suggestion : C:\ORACLE9\ORA92\ORADATA\ITD\ARCHIVE\1_3.DBF
ORA-00280: change 236004 for thread 1 is in sequence #3
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
CANCEL
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: 'C:\ORACLE9\ORA92\ORADATA\ITD\SYSTEM01.DBF'
ORA-01112: media recovery not started

Similar Messages

Deleted redo log files

hi everbody,
i use oracle 9.2 and 3 redo log files was created when installation. Now, i could not open database because two of redo log files was deleted (that i haven't understood how deleted.) So what can i do ? recovery is possible ? if poosibel how ?
NOTES :
my database does not work Archive mode and give below error messages...
Total System Global Area 126950220 bytes
Fixed Size 453452 bytes
Variable Size 96468992 bytes
Database Buffers 29360128 bytes
Redo Buffers 667648 bytes
Database mounted.
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: 'C:\ORACLE\ORADATA\ABUZER\REDO01.LOG'

thanks everbody. i couldn't give information because some problems was internet connections. i solved problems. i found command and info in the Oracle 8i Admin Guide documentation. first i dropped two log groups whose files are missing then recreate these these log groups with redo log files..before that i start up an new instance, but do not mount the database. after that i use commands like below :
ALTER DATABASE DROP LOGFILE GROUP 1 ;
ALTER DATABSE DROP LOGFILE GROUP 2 ;
ALTER DATABASE ADD LOGFILE GROUP 1 ('C:\...\REDO01.LOG') SIZE 1020400K
ALTER DATABASE ADD LOGFILE GROUP 2 ('C:\...\REDO02.LOG') SIZE 1020400K
thanks everbody...

How to clean redo log file?

Hi, guys:
I need to migrate data from external tables to normal tables. But the connection is always frozen half the way of executing script. The error message is ORA-00257. it looks redo log file is full. I tried to delete redo log file with RMAN, but I got this error message:
delete archivelog until time 'trunc(sysdate)';
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=43 device type=DISK
specification does not match any archived log in the repository
Any suggestion would be appreciated.
Sam

lxiscas wrote:
Hi, guys:
I need to migrate data from external tables to normal tables. But the connection is always frozen half the way of executing script. The error message is ORA-00257. it looks redo log file is full. I tried to delete redo log file with RMAN, but I got this error message:
Sounds like you are confusing (online) redo logs with "archivelogs" (archived redo logs).
You don't delete redo logs at all. You can delete archivelogs with rman, which is what your command is trying to do. Do you ever backup the archivelogs? A proper backup/recovery policy would backup the archivelogs on at least a daily (if not more often) basis, and delete them after they are backed up. That will keep the archivelog destination from filling up in all but the most extreme circumstances.
delete archivelog until time 'trunc(sysdate)';
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=43 device type=DISK
specification does not match any archived log in the repository
Any suggestion would be appreciated.
Sam

Accidently Deleted Online Redo Log Files

Dear friends
Just to give a try, I deleted online redo log files from the disk after clearn shutdown (In Test Environment Not A Production Database), then i started the dabase, I know we need atleast two online redo files for database to work properly. now my point of question is how can i create new online redo files ?
I have 2 redo logfile groups each with one member. In group 2 i have added new member for the deleted one using add logfile member ....... to group 2. but when i try todo the same to add logfile member to group1 I am not abale to do so. because its saying that this is the current logfile member. then I tried manual log switching to use next logfile member but database is not allowing as the database is just mounted not opened. plsease if any body helps me out to sort out this problem it will be a great help.
Anandkumar S.M
Oracle DBA
rC6Exv3

hello ur instruction u have is some what bit rite. but i was not able to solve the problem
finally i solved the problem with these commands after database is mounted
recover database until cancel Enter
then I select the cancel option when it provide the user with the options
after cancelling the recover i issued the following command
alter database open resetlogs;
this method sorted out my problem
anyway very very thanks for ur root hints from where i got the Idea to recover online redo logfiles
Thank u very much

Delete old and unused Archived Redo Log Files

Hello forum!
My db was in ARCHIVELOG mode and It created 9GB of archived redo log files.
Now I put the db in NOARCHIVELOG mode, can I delete all the ARLF? am I sure that the DB never need those files in the future?
If yes, how can I delete them? I will use 'del' operative system command?
In addition, I found this command:
SQL>alter database open resetlogs;
is it useful for my purpose?
thank you!

You are safe to remove those archivelog files if you altered your database to no archive log mode. Just remove them from OS level
Please bear in mind that database in no archivelog mode will lost data in the event of disaster.
SQL>alter database open resetlogs;Doesn't help in your situation, it's use to bring up database after incomplete recovery.

Redo log files deleted

Hello,
One of my friend deleted redo log and control files of one machine in cluster environment. Oracle parallel server(8.1.7) is installed on this cluster.
Redo log and control files of the second disk is still there.
Can i copy the control files and redo log files of the second disk to the first one...??? Will it work ???
Please let me know how should I go by it...??
Thanking in anticipation.
Regards,
Rajeev

Hello,
I don't have any experiences with cluster/parallel server. But in general:
1. Controlfile: shutdown database and cp exisiting controlfile to "old" destination. Filename must be similar to deleted controlfile.
2. Redo Logs: Drop and recreate groups step by step (no user activity recommended). Database won't crash, because members are still "alive" on second disk.
HTH,
juergen_klinsmann

Redo log file corupted, database not getting open

I am Oracle Funda-1 student.
Have install standard Oracle 9I on Windows XP pro service pack 2.
I made some changes in sample table & given commit. So log buffer will flush to redo log file.
Then I open current redo log file from OS & selected all junk characters [select all] & deleted same. Save the file. Causing redo file size 0KB.
Then made more changes to table & issue commit. no errors ! every thing working file.
Even chked V$log & V$logfile.
Again I open current redo log file from OS & selected all junk characters [ select all ] & deleted same. Save the file. Causing redo file size 0KB.
Then issue manual log switch. Alter system switch logfile
I got disconnected from database & database was close.
When I reconnected & try to open database in normal mode. Gave error saying redolog_1.log is corrupted & needed for recovery.
Now not even allowing me clear redo group 1. with alter database clear logfile group 1. as database is not coming to open stage.
just able to mount the database. with error rdolog_1 corrupted.
Wasn't oracle suppose to be halted when very 1st time I corrupted redo log file.
Why it disconnected me & got close.
When then one use alter database clear logfile group 1.

I may try this ALTER DATABASE OPEN RESETLOGS;
As no backup & not multiplex.
Still looking for explanation why database got close down instead of getting halt.
I have found one more status in V$log, which is not given in Oracle university book or online document.
INVALIDATED
Which come as a result when oracle unable to switch to next on line group due to non availability of next group redo log physical file.
SQL> select group#,members,status from V$log;
GROUP# MEMBERS STATUS
1 1 INVALIDATED
2 1 INACTIVE
4 1 UNUSED
As matter of fact, it's only portion of a big
document which happen to cover what you are testing
in detail.
I would invest time to read the document to
understand how things work instead of getting dirty
quick answers.

How Do I Restore Deleted Redo Logs

I currently have alter database archivelog set and am backing up my archive log redo file. However, I am trying to test a scenario where all of my redo log files have been deleted, and thus need to be restored. I have backups of my archivelog files. I'm trying to recover my redo log files by executing the following:
RMAN> restore archivelog all;
Starting restore at 14-AUG-02
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=9 devtype=DISK
archive log thread 1 sequence 102 is already on disk as file C:\ORACLE\ORA90\RDBMS\ARC00102.001
archive log thread 1 sequence 103 is already on disk as file C:\ORACLE\ORA90\RDBMS\ARC00103.001
archive log thread 1 sequence 104 is already on disk as file C:\ORACLE\ORA90\RDBMS\ARC00104.001
restore not done; all files readonly, offline, or already restored
Finished restore at 14-AUG-02
Since this doesn't work I'm assuming I'm doing something wrong. Therefore, what are the necessary steps for recovering my redo log files after they have been deleted? Thanks to all for your help.

Since my test assumes that the Control files, redo logs and all tablespaces and data files have been deleted. These are the steps I'm using to attempt a full backup & recovery.
3.     Login to SQLPLUS sys/jalisco@bas as sysdba
4.     SQL> startup mount bas <enter>
5.     SQL> alter database archivelog; <enter>
6.     Stop the Listener and Instance through Services or Net Stop as before.
7.     From a command enter C:\Oracle\startoracle jalisco bas.
8.     Login to RMAN: rman target sys/jalisco@bas <enter>
9.     RMAN> configure controlfile autobackup on; <enter>
10.     RMAN> backup database format
a.     2> /oraclebackup/rman_%d_%t.bas plus archivelog; <enter>
At this point Oracle is configured so that both the archivelog and control files get backed up to oracle\ora90\database. The archivelogs get stored in oracle\ora90\rdbms.
1.     Restore the control files.
2.     Restore the archivelogs.
3.     Restore the tablespaces and data files.
4.     Create new reset logs.
1.     Confirm that the Listener and BAS service have been started through the Contol Panel, or by using Net Start.
2.     Login to RMAN: rman target sys/jalisco@bas as sysdba
3.     RMAN> startup nomount
4.     RMAN> restore controlfile from /oracle/ora90/database/C-493922189-2002MMYYYY-00;
5.     RMAN> startup mount
6.     RMAN> run {
a.     2> restore archivelog all; }
7.     RMAN> restore database;
8.     Exit RMAN and Login to SQLPLUS sys/jalisco@bas as sysdba
9.     SQL> alter database open resetlogs;
At this point I get the error which is listed in the above thread.
At this point a complete recovery should have taken place. It is extremely important to create a new backup now before proceeding.

Hoping for a quick response : EXP and Archived REDO log files

I apologize in advance if this question has been asked and answered 100 times. I admit I didn't search, I don't have time. I'm leaving on vacation tomorrow, and I need to know if I'm correct about something to do with backup / restore.
we have 10g R2 running a single instance on a single server. The application vendor has "embedded" oracle with their application. The vendor's backup is a batch file using EXP - thus:
exp system/xpwdxx@db full=y file=D:\Orant\admin\db\EXP\db_full.dmp log=D:\Orant\admin\db\EXP\db_full.txt direct=y compress=y
This command is executed nightly at midnight. The files are then backed up by our nightly backup to offsite storage media.
Te database is running in autoarchive mode. The problem is, the archived redo files filled the drive they were being stored on, and it is the drive the database is on. I used OS commands to move 136G of archived redo logs onto other storage media to free the drive.
My question: Since the EXP runs at midnight, when there is likely NO activity, do I need to run in AutoArchive Mode? From what I have read, you cannot even apply archived redo log files to this type of backup strategy (IMP) Is that true? We are ok losing changes since our last EXP. I have read a lot of stuff about restoring consistent vs. inconsistent, and just need to know: If my disk fails, and I have to start with a clean install of Oracle and nothing else, can I IMP this EXP and get back up and running as of the last EXP? Or do I need the autoarchived redo log files back to July 2009 (136G of them).
Hoping for a quick response
Best Regards, and thanks in advance
Bruce Davis

Bruce Davis wrote:
Amardeep Sidhu
Thank you for your quick reply. I am reading in the other responses that since I am using EXP without consistent=y, I might not even have a backup. The application vendor said that with this dmp file they can restore us to the most recent backup. I don't really care for this strategy as it is untested. I asked them to verify that they could restore us and they said they tested the dmp file and it was OK.
Thank you for taking the time to reply.
Best Regards
BruceThe dump file is probably ok in the sense it is not corrupted and can be used in an imp operation. That doesn't mean the data in it is transactionally consistent. And to use it at all, you have to have a database up and running. If the database is physically corrupted, you'll have to rebuild a new database from scratch before you can even think about using your dmp file.
Vendors never understand databases. I once had a vendor tell me that Oracle's performance would be intolerable if there were more than 5 concurrent connections. Well, maybe in HIS product ..... Discussions terminated quickly after he made that statement.

Errors reported in alert log file regarding redo log files

Hi,
In my database i see the following entries regarding the redo log files frequently.
Thread 1 advanced to log sequence 88
Current log# 3 seq# 88 mem# 0: D:\ORACLE\PRODUCT\10.2.0\ORADATA\PELICAN\REDO03.LOG
Thread 1 advanced to log sequence 89
Current log# 1 seq# 89 mem# 0: D:\ORACLE\PRODUCT\10.2.0\ORADATA\PELICAN\REDO01.LOG
Thread 1 cannot allocate new log, sequence 90
Checkpoint not complete
I have 3 redo log files of 50MB each. My database is 10g.
What is the reason?
What do i need to do ?
Thanks.

Hi,
It is clearly stated that checkpoint is not complete. Thats why it could not allocate new sequence number to group 1.
We can understand that your redo log group size is insufficient. or increase the number of redo log groups.
Just test adding one more redo log group or test by increasing the size of redo log groups.

How to increase the size of Redo log files?

Hi All,
I have 10g R2 RAC on RHEL. As of now, i have 3 redo log files of 50MB size. i have used redo log size advisor by setting fast_start_mttr_target=1800 to check the optimal size of the redologs, it is showing 400MB. Now, i want to increase the size of redo log files. how to increase it?
If we are supposed to do it on production, how to do?
I found the following in one of the article....
"The size of the redo log files can influence performance, because the behavior of the database writer and archiver processes depend on the redo log sizes. Generally, larger redo log files provide better performance, however it must balanced out with the expected recovery time.Undersized log files increase checkpoint activity and increase CPU usage."
I did not understand the the point however it must balanced out with the expected recovery time in the above given paragraph.
Can anybody help me?
Thanks,
Praveen.

You dont have to shutdown the database before dropping redo log group but make sure you have atleast two other redo log groups. Also note that you cannot drop active redo log group.
Here is nice link,
http://www.idevelopment.info/data/Oracle/DBA_tips/Database_Administration/DBA_34.shtml
And make sure you test this in test database first. Production should be touched only after you are really comfortable with this procedure.

Online redo log files being removed physically

Grid Infra version: 11.2.0.4
RDBMS Version: 11.2.0.4
Although this is a RAC DB, this is not a RAC-specific question. Hence posting it here.
Few months back, I remember issuing a command similair to below (DROP LOGFILE GROUP ...) and the redo log files were still physically present in the diskgroup.
If I remember correctly, the file is not deleted physical so that we can use the REUSE functionality (ALTER DATABASE ADD LOGFILE MEMBER '+REDO/orcl/onlinelog/redo1b.log' reuse to group 11; ) ie. you can use the REUSE command to add the logfile of the same name which is physically present in OS Filesystem/Diksgroup to redo log group.
But today, after I issued the below command, I checked the diskgroup location from ASMCMD
SQL> alter database drop logfile group 31;
Database altered.
From ASMCMD, I can that the file has disappeared physically. Is this a new feature with 11.2.0.4 or am I missing something here ?
ASMCMD> ls +DATA/msblprd/onlinelog/group_31.548.833154995
ASMCMD-8002: entry 'group_31.548.833154995' does not exist in directory '+DATA/msblprd/onlinelog/'

Just to add to what Aman has said.
It is a bad practice not to let OMF decide the placement of Online redo logs because of this issue especially when you use ASM.
Executing rm command in Linux/Unix is easy but Dropping ASM aliases in the disk group can be a hassle.
This is documented.
"When a redo log member is dropped from the database, the operating system file is not deleted from disk. Rather, the control files of the associated database are updated to drop the member from the database structure. After dropping a redo log file, ensure that the drop completed successfully, and then use the appropriate operating system command to delete the dropped redo log file."
http://docs.oracle.com/cd/E11882_01/server.112/e25494/onlineredo.htm#ADMIN11324
BTW . You don't even need to set db_create_online_log_dest_n to enable OMF for ORLs.
SQL> show parameter log_dest
NAME                                 TYPE        VALUE
db_create_online_log_dest_1          string
db_create_online_log_dest_2          string
db_create_online_log_dest_3          string
db_create_online_log_dest_4          string
db_create_online_log_dest_5          string
SQL> show parameter db_create_file_dest
NAME                                 TYPE        VALUE
db_create_file_dest                  string      +MBL_DATA
alter database add logfile thread 4
group 31 ('+MBL_DATA','+MBL_FRA') size 4096M,
group 32 ('+MBL_DATA','+MBL_FRA') size 4096M,
group 33 ('+MBL_DATA','+MBL_FRA') size 4096M,
group 34 ('+MBL_DATA','+MBL_FRA') size 4096M ;
Database altered.
And redo logs will be neatly placed as shown below
   INST     GROUP# MEMBER                                             STATUS           ARC
         4         31 +MBL_DATA/bsblprd/onlinelog/group_31.276.832605441 UNUSED           YES
                      +MBL_FRA/bsblprd/onlinelog/group_31.297.832605445 UNUSED           YES
                   32 +MBL_DATA/bsblprd/onlinelog/group_32.547.832605451 UNUSED           YES
                      +MBL_FRA/bsblprd/onlinelog/group_32.372.832605457 UNUSED           YES
                   33 +MBL_DATA/bsblprd/onlinelog/group_33.548.832605463 UNUSED           YES
                      +MBL_FRA/bsblprd/onlinelog/group_33.284.832605469 UNUSED           YES
                   34 +MBL_DATA/bsblprd/onlinelog/group_34.549.832605475 UNUSED           YES
                      +MBL_FRA/bsblprd/onlinelog/group_34.359.832605481 UNUSED           YES

Require 9i Primary and Standby redo logs files same size?

Hi,
We have 9.2.0.6 Oracle RAC (2 node) and configured data guard (physical standby).
I want to increase redo log files size, but i can't this do same time primary and standby side.
Is there a rule, primary and standby database instances have same size redo log files?
If I increase only primary redo log files, is there any side effect? However I try this issue on test system. I increased all primary redo log files(if status='INACTIVE' drop redo log group and add redo log group, switch logfile,...)
, but i couldn't changed standby side. So the system is work well. Is this correct solution or not? How can i increase both sides redo log files?
Thank you for helps..

Thank you for your helps.. I found this issue answer:
http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14239/manage_ps.htm#i1010448
Consequently, when you add or drop an online redo log file at the primary site, it is important that you synchronize the changes in the standby database by following these steps:
If Redo Apply is running, you must cancel Redo Apply before you can change the log files.
If the STANDBY_FILE_MANAGEMENT initialization parameter is set to AUTO, change the value to MANUAL.
Add or drop an online redo log file:
To add an online redo log file, use a SQL statement such as this:
SQL> ALTER DATABASE ADD LOGFILE '/disk1/oracle/oradata/payroll/prmy3.log' SIZE 100M;
To drop an online redo log file, use a SQL statement such as this:
SQL> ALTER DATABASE DROP LOGFILE '/disk1/oracle/oradata/payroll/prmy3.log';
Repeat the statement you used in Step 3 on each standby database.
Restore the STANDBY_FILE_MANAGEMENT initialization parameter and the Redo Apply options to their original states.
bye..

Unassigned Status Of Standby Redo Log Files

I created 2 standby redo log groups, and use LGWR in primary site to
transfer redo data, all are good. But when I query the V$STANDBY_LOG
view, I found that the status column of my both standby redo logs is UNASSIGNED".
also sequence#
THREAD# and all others are 0 and 0.
Any explains.

Thanks for the reply Sophie. I did perform log switch at my primary site but the status of standby redo log files remained unassinged. I am pasting here the message in my Alert Log file may be that can help you to diagonose the problem.
ALTER DATABASE SET STANDBY DATABASE PROTECTED
Tue Jul 26 15:35:18 2005
Completed: ALTER DATABASE SET STANDBY DATABASE PROTECTED
Tue Jul 26 15:35:22 2005
ALTER DATABASE OPEN
Tue Jul 26 15:35:23 2005
LGWR: Primary database is in CLUSTER CONSISTENT mode
LGWR: Primary database is in MAXIMUM PROTECTION mode
LGWR: Destination LOG_ARCHIVE_DEST_1 is not serviced by LGWR
LNS0 started with pid=18
Tue Jul 26 15:35:28 2005
LGWR: Error 16086 verifying archivelog destination LOG_ARCHIVE_DEST_2
LGWR: Continuing...
Tue Jul 26 15:35:28 2005
Errors in file e:\oracle\admin\test\bdump\test_lgwr_1864.trc:
ORA-16086: standby database does not contain available standby log files
LGWR: Error 16086 disconnecting from destination LOG_ARCHIVE_DEST_2 standby host 'TESTstdb'
LGWR: Minimum of 1 applicable standby database required
Tue Jul 26 15:35:28 2005
Errors in file e:\oracle\admin\test\bdump\test_lgwr_1864.trc:
ORA-16072: a minimum of one standby database destination is required
LGWR: terminating instance due to error 16072
Instance terminated by LGWR, pid = 1864

Redo log files lost in Disk Corruption/failure

DB version:10gR2
In one of our test databases, I have lost all members of a group due to disk corruption(it was a bad practise to store both members on the same filesystem)
Database is still up. We don't have a backup of the lost redo log group. Altogether we had 3 redo log groups. this is what i am going to do to fix this issue.
Step 1. Add a redo log group
ALTER DATABASE
ADD LOGFILE ('/u04/oradata/ora67tst/log4a.rdo',
   '/u05/oradata/ora67tst/log4b.rdo') SIZE 15m;Step 2. Drop the corrupted redo log group
ALTER DATABASE DROP LOGFILE GROUP 2;Is this the right way to go about fixing this issue?
The documentation says that you need to make sure a redo log group is archived before you DROP it.
When i use the query
SQL>SELECT GROUP#, ARCHIVED, STATUS FROM V$LOG;
    GROUP# ARC STATUS
         1 YES ACTIVE
         2 NO CURRENT
         3 NO INACTIVE
How can i force the archiving of a redo log group 2?
Edited by: Citizen_2 on May 28, 2009 10:10 AM
Edited by: Citizen_2 on May 28, 2009 10:11 AM

Citizen_2 wrote:
How can i force the archiving of a redo log group 2?How could you archive a log group when you have lost all members of that group?
Have you checked out this documentation: [Recovering After the Loss of Online Redo Log Files|file://///castle/1862/Home%20Directories/Vaillancourt/Oracle%2010gR2%20Doc/backup.102/b14191/recoscen008.htm#sthref1872]
More specifically:
If the group is . . .      Current
Then . . .
It is the log that the database is currently writing to.
And you should . . .
Attempt to clear the log; if impossible, then you must restore a backup and perform incomplete recovery up to the most recent available redo log.
>
HTH!

Deleted redo log files in test

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