Recoevery in Archive Log Mode

If our database is running in Archivelog mode and if instance crashes, then how we can oerfrom the recoevery process in order to recover the lost transactions which were never committed.
Thanks

Hi,
The crash recovery process is a special form of recovery, which happens the first time an Oracle database instance is started after a crash (or SHUTDOWN ABORT). In crash recovery, the goal is to bring the datafiles to a transaction-consistent state, preserving all committed changes up to the point when the instance failed.
Unlike the forms of recovery performed manually after a data loss, crash recovery uses only the online redo log files and current online datafiles, as left on disk after the instance failure. Archived logs are never used during crash recovery, and datafiles are never restored from backup.
The database applies any pending updates in the online redo logs to the online datafiles of your database. The result is that, whenever the database is restarted after a crash, the datafiles reflect all committed changes up to the moment when the failure occurred. (After the database opens, any changes that were part of uncommitted transactions at the time of the crash are rolled back.)
Instance Recovery is only used in a RAC environment. It is the application of online redo log by one instance that detected the crash of another instance.
Cheers

Similar Messages

  • Standby Database (Archive Log Mode)

    I'm going to be setting up a standby database.
    I understand that the primary database must be in archive log mode.
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    Since your primary Db is in archive log mode, so will be your standby, when it is made primary.But. you can use STANDBY REDO LOGS from 9i version, where these Standby Redo Logs then store the information received from the Primary Database.
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    >
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    >
    Check metalink Doc ID: Note:219344.1
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  • Is the only way to import large amount of data and database objects into a primary database is to shutdown the standby, turn off archive log mode, do the import, then rebuild the standby?

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    Instead of rebuilding the (whole) standby, you take an incremental (from SCN) backup from the Primary and restore it on the Standby.  That way, if, for example
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  • Question about import in archive log mode

    Hello.
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    540M is not that much.
    One would question why you need to import every day,
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    The three steps you propose look like an awful
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    The scenario is also incomplete as one would need to
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    If you can convince your DBA to close the database
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    - That database is not critical, it is just for a team who will test on that database several applications, so the database will only need to be open during the office schedule.
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  • Archive log mode in oracle 10g

    Hi,
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    Hi Paul
    Because I am a newbie in DBA Oracle so I got many difficulties.
    You are very kind to help me.
    So I have some more questions:
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    Please guilde more detail.
    Thanks for your attention.
    Message was edited by:
    user481034

  • Disabling Log_Archive_Start in Archive Log Mode

    Guys,
    I have a Database running in Archive Log mode.
    I have a situation where in I have to do bunch of bulk updates for which I dont want any logs generated.
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    Hello,
    I would use some other way to get a full nologing behaviour.
    First, ensure your tablespace is in force logging mode.
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  • Physical standby in archive log mode

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    Hello again;
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  • Archive log mode

    Hi
    i m using oracle 10gR2 after installation i enable the archive log mode.
    1) How can i determine the size of archive log?
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    The size of archived logs will normally be the same as the size of online redo logs. However, if you switch the logs before the get filled with redo, the size of archived log will be smaller depending in the amount of redo.

  • Archive log mode Turn off

    Hi all DBA guys, Have a Nice day all
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    Is this old archive log backup use for future if again convert no archive to archive log mode?
    What's happen flashback if i change archive log mode to no archive log mode?
    Regards
    S.Azar

    azarmohds wrote:
    Thanx lot,
    why i asked this question means, rightnow you posted, this is feature of 10g i.e flashback database confiured when archive log mode is enabled...,so in this case
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    You should be clear about things that when you read notes from web, there can be a language mismatch. So the best is that search first over the oracle docs.
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    Aman....

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    Hi All,
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    Hi,
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  • Archive log mode required for async. CDC?

    Hello there,
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  • When creating a tablespace why should we enable LOGGING when a database is already on ARCHIVE LOG mode

    Question :
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  • Putting a Oracle RAC in  to archive log mode??

    Our RAC is a 10gR2 Three(3) node RAC with a SAN as the shared storage. cluster is installed on linux. at the moment the RAC is in noarchieve log mode.
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    many thanks for the replies
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    log_archive_dest string
    log_archive_dest_1 string
    log_archive_dest_10 string
    log_archive_dest_2 string
    log_archive_dest_3 string
    log_archive_dest_4 string
    log_archive_dest_5 string
    log_archive_dest_6 string
    log_archive_dest_7 string
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    log_archive_dest_8 string
    log_archive_dest_9 string
    log_archive_dest_state_1 string enable
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    log_archive_dest_state_2 string enable
    log_archive_dest_state_3 string enable
    log_archive_dest_state_4 string enable
    log_archive_dest_state_5 string enable
    log_archive_dest_state_6 string enable
    log_archive_dest_state_7 string enable
    log_archive_dest_state_8 string enable
    NAME TYPE VALUE
    log_archive_dest_state_9 string enable
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    log_archive_format string %t_%s_%r.dbf
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    log_archive_max_processes integer 2
    log_archive_min_succeed_dest integer 1
    log_archive_start boolean FALSE
    log_archive_trace integer 0
    remote_archive_enable string true
    standby_archive_dest string ?/dbs/arch

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