Doubt RMAN

Hi all

I set up RMAN by creating the new database and created the catalog and... .and I took the full backup of database with rman too.

and my database size is 13 GB and used space is 7 GB, but when I took full backup of the backup piece size is much lower as shown below.

My doubt is the size of the backup piece is not even that the database used space? RMAN is any compression by itself? What is the bakcup orginal piece that can be used to restore the entire database?


-rw - r - 1 oracle dba 474136576 20 June to 18:35 o1_mf_nnndf_TAG20110620T183540_6zzlswvp_.bkp
-rw - r - 1 oracle dba 6979584 20 June to 18:35 o1_mf_ncnnf_TAG20110620T183540_6zzltd21_.bkp

Please help, thanks in advance

This test only the backup files. You can read about the RMAN command.

Validate restore them database;

KDSDBA

Tags: Database

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    using the ORA_DISK_2 channel
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    Here are the steps of restoration and recovery with o/p for your reference:

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    Recovery Manager: release 11.2.0.1.0 - Production Wednesday, may 25, 22:19:49 2011

    Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.

    connected to the database target (not started)

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    Oracle instance started

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    Bytes of size 1338280 fixed
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    Redo buffers 5652480 bytes

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    allocated channel: ORA_DISK_1
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    channel ORA_DISK_1: restore the control file
    channel ORA_DISK_1: restore complete, duration: 00:00:04
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    Starting copy of implicit intersection to 25 May 11
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    Kind regards
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    I have no onlinelogs on the host. I deleted all the log files from the flash and oradata recovery area before you begin the process of restoration and recovery on the host (.dbf, .log, .ctl). When I tried with "database recovery command", he gave following error (it's just the excerpt from o/p):

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    >

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    See you soon
    Jörg

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    Hello

    I have a doubt.

    is it possible to clone the 11.2.0.1.0 to 11.2.0.4.0 database using RMAN backup?

    I mean clone low version database to a higher version database?

    You can restore a backup 11.2.0.1.0 using 11.2.0.4 software and then update, Yes.

    You will need to make sure you do an alter database open...... UPGRADE... at the end of the restore, then run the upgrade scripts.

  • Duplicate RMAN cloning using the database using the current database

    Hi all

    I am new bie, I want to clone my target database using the rman command 'DUPLICATE database OF ACTIVE DATABASE"new host.

    steps on google, I searched, but I got confused, I doubt if you need to install oracle rdbms softare on new host or not? and also should I copy all files (redo, control, datafiles) to the new host? kind LY help and tell me the steps to clone the database using rman.your help will be appreciated.

    Thank you.

    Kind regards.

    OS: RHEL 5.4

    DB: 11.2.0.3

    Hello

    Have you not through document link to Gavin at least. It's very simple steps. If you wait until other measures, then won't them.

    He had provided the demonstration, at least get in 'google' (you'll have so many links)

    The Oracle Dba Italian Blogger: how to clone an Oracle 11 g 2 home

    http://balaoracledba.com/2013/12/16/cloning-an-existing-Oracle11g-release-2-RDBMS-installation/

    Note: If you feel always complex, better skip the task itself.

    -Thank you

    Pavan Kumar N

  • What happened when RMAN 1 level 1 is running and start a 2nd

    Hello

    I have some doubts on the RMAN backup,

    (1) what will happen when the first backup which is cumulative level 1 is running and second level 1 is launched.

    Example,

    Each work day 4 h level 1 is running and not completed and 9 AM is started before complete 04:00, in this situation, what would happen if 04:00 will be shut down properly and 09:00 will start correctly or any error will be through?

    (2) what happens when level 1 is running and not completed when the use of level 0 is the beginning.

    (3) is 1 / my dismissal and have only a level 0 and other many cumulative level 1 filled with hard drive backup and it reached assigned size. How I can take more away level 1 and how can I take level 0. If I don't have enough memory.

    When my redundancy policy is 1 so I would have 2 valid level 0 then then a level 0 backup will become obsolete and can delete.

    Help, please.

    (1) 2nd level 1 will take place at the same time.

    (2) level 0 will start and operate concurrently.

    (3) you need to extend the backup volume. If you can't do that let down backups, then do the 0 level.

  • Parallel recovery in RMAN?

    O.S: OEL 5.5

    DB version: 11.2.0.3

    Hello Experts,

    I have some doubts on the recovery RMAN. I would like to know your opinion of experts.

    (1) process that performs the RMAN recovery (just as the MRP in standby).

    (2) I always thought that recovery is a sequential task. This thread (parallel recovery) saved my theory. However, I see RMAN commands likeRMAN>recover database parallel 4 . So what is the parallel option used for?

    (3) if the recovery is a sequential process, how can we have several MRP process on the side of Eve (PHYSICS: why recovery managed to reproduce so many slaves?) (Doc ID 885872.1).

    Thank you very much in advance.

    Satya

    (1) so the "server process" began with the RMAN dealing with recovery too? Please correct me.

    RMAN Utility is just a customer.

    RMAN connect to the database and execute commands, all the work is done on the server side. Server database always process take care of backup/restore/recovery.

    (2) automatic channels is also used for the recovery and restoration? I always manually assign during the restore and recovery.

    N ° auto-channel is reserved for backup and restore operations.

    RECOVERY operation (aka Media Recovery) is different from the command RECOVER, because the execution process of recovery RECOVER command also trigger archivelogs of RESTORATION, and RECOVERY process apply that Redo on data files.

    Recovery operation is managed by * parallel * parameters not automatic channels.

    (3)'with the resumption of parallel media, these blocks of data are subsequently distributed evenly to all recovery processes to read into the buffer cache. "--> Does this mean that the recovery of the parallel media is intended to copy multiple blocks in parallel to the memory buffer uses cache ONLY. However, the recovery process (applying the vectors of change) is a sequential process? Please correct me

    The writing is not all sequential process, but each block of data is retrieved sequentially.

    Parallel media recovery, the database uses a 'division of labour' approach to allocate different processes at different data blocks while rolling forward, which makes the process more effective.

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