Creation Zone

  • Subscribe to our RSS feed.
  • Twitter
  • StumbleUpon
  • Reddit
  • Facebook
  • Digg

Thursday, 4 January 2007

Oracle: Lost Redo Log

Posted on 01:44 by Unknown
Scenario:

The disk that is holding the most up-to-date redo log files experienced a fatal failure, and the database wouldn't come up any more. It complains about missing redo logs. So, you copy the redo log files from a recent backup; but still the database won't come up with error messages like ORA-00314: log 1 of thread 1, expected sequence# doesn't match.

SQL> startup
ORACLE instance started.

Total System Global Area 4294967296 bytes
Fixed Size 1306568 bytes
Variable Size 2534150200 bytes
Database Buffers 1728053248 bytes
Redo Buffers 31457280 bytes
Database mounted.
ORA-00314: log 1 of thread 1, expected sequence# doesn't match
ORA-00312: online log 1 thread 1: '/opt/oracle/oradata_4/RedoLogFiles/log1.dbf'

How to bring up the database with no redo logs?

In production environments, usually archive logging will be turned on. If that's the case, consult the Oracle system administration documentation to restore the lost transactions.

In all other cases it is very unlikely to recover the lost transactions. So the easiest way to bring up the database is to rebuild the control file. The steps to rebuild the control file with new redo log files are as follows:
  1. Start the database up.

    SQL> startup <- let it complain about online redo log


  2. Run the following command to dump the control file into a trace file.
    SQL> alter database backup controlfile to trace;
    Database altered.

    Go to udump location and locate the file which contains the necessary SQL text to build the control file. The easiest way is to grep for text like 'CREATE CONTROLFILE REUSE DATABASE'. Once you locate the trace file, change the extension from trc to sql and change NORESETLOGS to RESETLOGS. That is, a SQL like:

    CREATE CONTROLFILE REUSE DATABASE "XYZ" NORESETLOGS NOARCHIVELOG

    should be changed to

    CREATE CONTROLFILE REUSE DATABASE "XYZ" RESETLOGS NOARCHIVELOG

    Remove the lines starting from the line "RECOVER DATABASE USING BACKUP CONTROLFILE" to the end.


  3. Shut down the database


  4. Add the parameter _allow_resetlogs_corruption=TRUE to the init.ora file.


  5. Run the script that you just modified -- it creates a new control file.


  6. Shut down the database one more time


  7. Start the database instance by running startup command as sysdba. It may fail with the error ORA-01589: must use RESETLOGS or NORESETLOGS option for database open


  8. Open the database with by running alter database open resetlogs;. Redo log files will be automatically created in this step.


  9. Shutdown the database, remove the parameter _allow_resetlogs_corruption=TRUE from the init.ora file and restart the database instance. If the instance comes up fine, shut it down and take a backup. Otherwise, check the alert messages carefully and act accordingly to fix the things up.



Acknowledgements:
Akiko Marti

________________
Technorati tags:
Oracle
Email ThisBlogThis!Share to XShare to Facebook
Posted in | No comments
Newer Post Older Post Home

0 comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Popular Posts

  • *nix: Workaround to cannot find zipfile directory in one of file.zip or file.zip.zip ..
    Symptom: You are trying to extract the archived files off of a huge (any file with size > 2 GB or 4GB, depending on the OS) ZIP file with...
  • C/C++: Printing Stack Trace with printstack() on Solaris
    libc on Solaris 9 and later, provides a useful function called printstack , to print a symbolic stack trace to the specified file descripto...
  • JDS: Installing Sun Java Desktop System 2.0
    This document will guide you through the process of installing JDS 2.0 on a PC from integrated CDROM images Requirements I...
  • Binary compatibility
    What's It? "Binary compatibility" (BC) is the ability of one machine to run software that was written for another without hav...
  • Solaris: NULL pointer bugs & /usr/lib/0@0.so.1 library
    Some programmers assume that a NULL character pointer is the same as a pointer to a NULL string. However de-referencing a NULL pointer (ie.,...
  • Database: Oracle Server Architecture (overview)
    Oracle server consists of the following core components: 1) database(s) & 2) instance(s) 1) database consists of: 1) datafil...
  • Sun: OpenJDK
    Open source JDK, that is. Sun Microsystems did it again -- As promised during JavaOne event back in May 2006, Sun made the implementation of...
  • Consolidating Siebel CRM 8.0 on a Single Sun SPARC Enterprise Server, T5440
    .. blueprint document is now available on wikis.sun.com . Here is the direct link to the blueprint:              Consolidating Oracle Siebel...
  • Oracle Internet Directory 11g Benchmark on SPARC T5
    SUMMARY System Under Test (SUT)     Oracle's SPARC T5-2 server Software     Oracle Internet Directory 11 g R1-PS6 Target Load     50...
  • Fix to Firefox 3 Crash on Solaris 10 x86
    Symptom : Firefox 3 crashes on Solaris 10 x86 when the web browser tries to render some of the HTML pages with SWF content in them. For exam...

Categories

  • 80s music playlist
  • bandwidth iperf network solaris
  • best
  • black friday
  • breakdown database groups locality oracle pmap sga solaris
  • buy
  • deal
  • ebiz ebs hrms oracle payroll
  • emca oracle rdbms database ORA-01034
  • friday
  • Garmin
  • generic+discussion software installer
  • GPS
  • how-to solaris mmap
  • impdp ora-01089 oracle rdbms solaris tips upgrade workarounds zombie
  • Magellan
  • music
  • Navigation
  • OATS Oracle
  • Oracle Business+Intelligence Analytics Solaris SPARC T4
  • oracle database flashback FDA
  • Oracle Database RDBMS Redo Flash+Storage
  • oracle database solaris
  • oracle database solaris resource manager virtualization consolidation
  • Oracle EBS E-Business+Suite SPARC SuperCluster Optimized+Solution
  • Oracle EBS E-Business+Suite Workaround Tip
  • oracle lob bfile blob securefile rdbms database tips performance clob
  • oracle obiee analytics presentation+services
  • Oracle OID LDAP ADS
  • Oracle OID LDAP SPARC T5 T5-2 Benchmark
  • oracle pls-00201 dbms_system
  • oracle siebel CRM SCBroker load+balancing
  • Oracle Siebel Sun SPARC T4 Benchmark
  • Oracle Siebel Sun SPARC T5 Benchmark T5-2
  • Oracle Solaris
  • Oracle Solaris Database RDBMS Redo Flash F40 AWR
  • oracle solaris rpc statd RPC troubleshooting
  • oracle solaris svm solaris+volume+manager
  • Oracle Solaris Tips
  • oracle+solaris
  • RDC
  • sale
  • Smartphone Samsung Galaxy S2 Phone+Shutter Tip Android ICS
  • solaris oracle database fmw weblogic java dfw
  • SuperCluster Oracle Database RDBMS RAC Solaris Zones
  • tee
  • thanksgiving sale
  • tips
  • TomTom
  • windows

Blog Archive

  • ►  2013 (16)
    • ►  December (3)
    • ►  November (2)
    • ►  October (1)
    • ►  September (1)
    • ►  August (1)
    • ►  July (1)
    • ►  June (1)
    • ►  May (1)
    • ►  April (1)
    • ►  March (1)
    • ►  February (2)
    • ►  January (1)
  • ►  2012 (14)
    • ►  December (1)
    • ►  November (1)
    • ►  October (1)
    • ►  September (1)
    • ►  August (1)
    • ►  July (1)
    • ►  June (2)
    • ►  May (1)
    • ►  April (1)
    • ►  March (1)
    • ►  February (1)
    • ►  January (2)
  • ►  2011 (15)
    • ►  December (2)
    • ►  November (1)
    • ►  October (2)
    • ►  September (1)
    • ►  August (2)
    • ►  July (1)
    • ►  May (2)
    • ►  April (1)
    • ►  March (1)
    • ►  February (1)
    • ►  January (1)
  • ►  2010 (19)
    • ►  December (3)
    • ►  November (1)
    • ►  October (2)
    • ►  September (1)
    • ►  August (1)
    • ►  July (1)
    • ►  June (1)
    • ►  May (5)
    • ►  April (1)
    • ►  March (1)
    • ►  February (1)
    • ►  January (1)
  • ►  2009 (25)
    • ►  December (1)
    • ►  November (2)
    • ►  October (1)
    • ►  September (1)
    • ►  August (2)
    • ►  July (2)
    • ►  June (1)
    • ►  May (2)
    • ►  April (3)
    • ►  March (1)
    • ►  February (5)
    • ►  January (4)
  • ►  2008 (34)
    • ►  December (2)
    • ►  November (2)
    • ►  October (2)
    • ►  September (1)
    • ►  August (4)
    • ►  July (2)
    • ►  June (3)
    • ►  May (3)
    • ►  April (2)
    • ►  March (5)
    • ►  February (4)
    • ►  January (4)
  • ▼  2007 (33)
    • ►  December (2)
    • ►  November (4)
    • ►  October (2)
    • ►  September (5)
    • ►  August (3)
    • ►  June (2)
    • ►  May (3)
    • ►  April (5)
    • ►  March (3)
    • ►  February (1)
    • ▼  January (3)
      • Backing Up Sun Secure Application Switch Configura...
      • Energy Policy Act of 2005 - Daylight Saving Time c...
      • Oracle: Lost Redo Log
  • ►  2006 (40)
    • ►  December (2)
    • ►  November (6)
    • ►  October (2)
    • ►  September (2)
    • ►  August (1)
    • ►  July (2)
    • ►  June (2)
    • ►  May (4)
    • ►  April (5)
    • ►  March (5)
    • ►  February (3)
    • ►  January (6)
  • ►  2005 (72)
    • ►  December (5)
    • ►  November (2)
    • ►  October (6)
    • ►  September (5)
    • ►  August (5)
    • ►  July (10)
    • ►  June (8)
    • ►  May (9)
    • ►  April (6)
    • ►  March (6)
    • ►  February (5)
    • ►  January (5)
  • ►  2004 (36)
    • ►  December (1)
    • ►  November (5)
    • ►  October (12)
    • ►  September (18)
Powered by Blogger.

About Me

Unknown
View my complete profile