Redologs in physical standby database

The MRP process is started and the standby database is physical standby, which is running under managed standby. My Question is as below
1. Under managed recovery mode do we require the redo logs created on the physical standby database.
2. How does oracle keep the database in sync when there are no redo logs are created on the standby database.

The output is as below
SQL> select status, pid, sequence# from v$managed_standby where process like 'MRP%';
STATUS PID SEQUENCE#
WAIT_FOR_GAP 29710 88576
SQL>
The contents of alertlog ; i Just restarted the managed recovery to capture the information
RFS[1]: Archived Log: '/u02/archive/1_88817_665420030.dbf'
Sun Apr 18 18:34:26 2010
RFS[2]: No standby redo logfiles created
RFS[2]: Archived Log: '/u02/archive/1_88818_665420030.dbf'
Sun Apr 18 18:44:26 2010
RFS[3]: No standby redo logfiles created
RFS[3]: Archived Log: '/u02/archive/1_88819_665420030.dbf'
Sun Apr 18 18:54:26 2010
RFS[4]: No standby redo logfiles created
RFS[4]: Archived Log: '/u02/archive/1_88820_665420030.dbf'
Sun Apr 18 18:56:32 2010
alter database recover managed standby database cancel
Sun Apr 18 18:56:50 2010
MRP0: Background Media Recovery cancelled with status 16037
Sun Apr 18 18:56:50 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_29710.trc:
ORA-16037: user requested cancel of managed recovery operation
Recovery interrupted!
Sun Apr 18 18:56:51 2010
Waiting for MRP0 pid 29710 to terminate
Sun Apr 18 18:56:51 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_29710.trc:
ORA-16037: user requested cancel of managed recovery operation
Sun Apr 18 18:56:51 2010
MRP0: Background Media Recovery process shutdown (rmdp3)
Sun Apr 18 18:56:52 2010
Managed Standby Recovery Canceled (rmdp3)
Completed: alter database recover managed standby database cancel
Sun Apr 18 18:57:19 2010
alter database recover managed standby database disconnect
from session
Sun Apr 18 18:57:19 2010
Attempt to start background Managed Standby Recovery process (rmdp3)
MRP0 started with pid=19, OS id=2123
Sun Apr 18 18:57:19 2010
MRP0: Background Managed Standby Recovery process started (rmdp3)
Managed Standby Recovery not using Real Time Apply
Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
Clearing online redo logfile 1 /u03/redologs/rmdp3/redo01.log
Clearing online log 1 of thread 1 sequence number 88818
Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
Sun Apr 18 18:57:24 2010
Errors in file /opt/home/oracle/admin/rmdp3/bdump/rmdp3_mrp0_2123.trc:
ORA-19527: physical standby redo log must be renamed
ORA-00312: online log 1 thread 1: '/u03/redologs/rmdp3/redo01.log'
Clearing online redo logfile 1 complete
Media Recovery Waiting for thread 1 sequence 88576
Fetching gap sequence in thread 1, gap sequence 88576-88675
FAL[client]: Error fetching gap sequence, no FAL server specified
Sun Apr 18 18:57:25 2010
Completed: alter database recover managed standby database disconnect
from session
Sun Apr 18 18:57:54 2010
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 88576-88675
DBID 440735188 branch 665420030
FAL[client]: All defined FAL servers have been attempted.
Check that the CONTROL_FILE_RECORD_KEEP_TIME initialization
parameter is defined to a value that is sufficiently large
enough to maintain adequate log switch information to resolve
archivelog gaps.
Edited by: user11982297 on Apr 18, 2010 10:58 AM

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    select 'alter database add standby logfile '''||
    regexp_substr(MEMBER,'/.+/')||'stdby_redo0'||(select max(group#)+1 from v$log)||'.rdo'||
    ''' size '||bytes||';' "Create Standby redo"
    from v$logfile lf , v$log l
    where l.group# = lf.group#
    and rownum <=2
    Create Standby redo
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo03a.rdo' size 52428800;
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo03b.rdo' size 52428800;
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo02a.rdo' size 52428800;
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo02b.rdo' size 52428800;
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo01a.rdo' size 52428800;
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo01b.rdo' size 52428800;
    alter database add standby logfile '/oracle/redo/prod1/stdby_redo04.rdo' size 52428800;
    more
    http://www.pythian.com/news/581/oracle-standby-redo-logs
    Regards,
    Tom
    http://asktom.cz

  • Create ONLINE logfile in physical standby database

    We have created a physical standby database with rman duplicate command on a remote server
    "duplicate target database for standby dorecover nofilenamecheck"
    When I see the standby server...Online logfiles are not created however its relevant entries are there in V$LOG and V$LOGFILE views.
    I guess it is the default behaviour of duplicate command in RMAN and we can not specify LOGFILE clause when we create standby database.
    Now the problem is we could not drop the online logfile on standby database since it's status is "CURRENT", "ACTIVE".
    Since the ONLINE LOGFILE are not actually created , "ALTER DATABASE CLEAR LOGFILE GROUP " command returns with error as it could not find the file in the server.
    So How we can drop the current/active online logfile and add new ones in standby db?

    I'm assuming you have physical standby. Here are step I did in the past.
    1) create a backup control file
    2) bring the database back using the "recreate control file" it the trace file BUT you need to remove or comment out the line that has the corrupt or missing redo log file. And don't forget to add the tempfile after you recreate the controlfile
    example:
    alter database backup controlfile to trace;
    STARTUP NOMOUNT
    CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS FORCE LOGGING ARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
    LOGFILE
    GROUP 1 '/oracledata/orcl/redo01.log' SIZE 200M,
    GROUP 2 '/oracledata/orcl/redo02.log' SIZE 200M,
    GROUP 3 '/oracledata/orcl/redo03.log' SIZE 200M,
    # GROUP 3 '/oracledata/orcl/redo03.log' SIZE 200M
    -- STANDBY LOGFILE
    -- GROUP 10 '/oracledata/orcl/redostdby04.log' SIZE 200M,
    -- GROUP 11 '/oracledata/orcl/redostdby05.log' SIZE 200M
    DATAFILE
    '/oracledata/orcl/system01.dbf',
    '/oracledata/orcl/undotbs01.dbf',
    '/oracledata/orcl/sysaux01.dbf',
    '/oracledata/orcl/users01.dbf'
    CHARACTER SET WE8ISO8859P1
    If you just want to add the standby redo log then using this command.
    alter database add standby logfile
    '/<your_path>/redostdby01.log' size 200M reuse,

  • How to create 11.2.0.2 physical standby database from 2 node RAC (11.2.0.2)

    Hi,
    Can any one please help me How to manually create 11.2.0.2 standalone physical standby database from 2 node RAC (11.2.0.2) database which is running in RHEL5 and ASM plugged in.
    DB : 11.2.0.2
    OS : RHEL5
    RMAN duplicate is causing problem with network and we decided to go for manual creation of the same.
    Thanks in Advance..

    Hi;
    Can any one please help me How to manually create 11.2.0.2 standalone physical standby database from 2 node RAC (11.2.0.2) database which is running in RHEL5 and ASM plugged in.
    DB : 11.2.0.2
    OS : RHEL5I had similar issue, what i did
    1. Used source oracle_home on standby server
    2. Created new asm instance and use same naming
    3. I took RMAN full backup on source and move it to target
    4. I edit initora file remove RAC setting and restore db(also edited listener file)
    Regard
    Helios

  • Issue on physical standby database

    Hi
    I've a problem on standby database.
    I recently added a datafile on primary database, then I scp'ed the data file to physical standby database.On physical standby database I tried performing recovery.
    I get following message in my alert log
    WARNING! Recovering data file 88 from a fuzzy file. If not the current file
    it might be an online backup taken without entering the begin backup command.
    ORA-279 signalled during: ALTER DATABASE RECOVER standby database ...
    how can I fix this now.
    We keep physical standby database 2 day behind, and apply logs manually.
    Physical standby database is maintained manually.
    Could someone help me in getting out of this problem.
    Oracle 9.2.0.7
    solaris

    Versus keeping it in manual mode, you can specify a time "delay" for the application of the logs:
    From http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/log_apply.htm#i1022811
    6.2.2 Specifying a Time Delay for the Application of Archived Redo Log Files
    In some cases, you may want to create a time lag between the time when redo data is received from the primary site and when it is applied to the standby database. You can specify a time interval (in minutes) to protect against the application of corrupted or erroneous data to the standby database. When you set a DELAY interval, it does not delay the transport of the redo data to the standby database. Instead, the time lag you specify begins when the redo data is completely archived at the standby destination.
    Note:
    If you define a delay for a destination that has real-time apply enabled, the delay is ignored.
    Specifying a Time Delay
    You can set a time delay on primary and standby databases using the DELAY=minutes attribute of the LOG_ARCHIVE_DEST_n initialization parameter to delay applying archived redo log files to the standby database. By default, there is no time delay. If you specify the DELAY attribute without specifying a value, then the default delay interval is 30 minutes.
    Canceling a Time Delay
    You can cancel a specified delay interval as follows:
    For physical standby databases, use the NODELAY keyword of the RECOVER MANAGED STANDBY DATABASE clause:
    SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE NODELAY;
    For logical standby databases, specify the following SQL statement:
    SQL> ALTER DATABASE START LOGICAL STANDBY APPLY NODELAY;
    These commands result in log apply services immediately beginning to apply archived redo log files to the standby database, before the time interval expires. Also, see:
    Section 12.8, "Using a Physical Standby Database with a Time Lag"
    Oracle Database SQL Reference for the DELAY attribute of the ALTER DATABASE RECOVER MANAGED STANDBY DATABASE statement

  • Issue with physical standby database not in sync with primary

    Hi,
    I created an physical standby database couple of Hours back . I am trying to keep the standby database in Managed recovery mode to make the standby in sync with primary but it is throwing the below erros. Please share your suggestion ...
    SQL> select thread#,max(sequence#) from v$log_history group by thread#;
    THREAD# MAX(SEQUENCE#)
    1 7
    PROCESS STATUS THREAD# SEQUENCE#
    ARCH CONNECTED 0 0
    ARCH CONNECTED 0 0
    RFS OPENING 1 12
    ALERT LOG :
    Tue Mar 20 07:31:32 2012
    alter database recover managed standby database disconnect from session
    Tue Mar 20 07:31:32 2012
    Attempt to start background Managed Standby Recovery process (PRIMARY)
    MRP0 started with pid=18, OS id=16370
    Tue Mar 20 07:31:32 2012
    MRP0: Background Managed Standby Recovery process started (PRIMARY)
    Managed Standby Recovery not using Real Time Apply
    parallel recovery started with 8 processes
    Media Recovery Log /oracle/STDBY/arch/1_3_777567883.dbf
    Tue Mar 20 07:31:39 2012
    Completed: alter database recover managed standby database disconnect from session
    Tue Mar 20 07:31:54 2012
    Incomplete recovery applied all redo ever generated.
    Recovery completed through change 9677325080303
    Tue Mar 20 07:31:54 2012
    MRP0: Media Recovery Complete (PRIMARY)
    Tue Mar 20 07:31:55 2012
    MRP0: Background Media Recovery process shutdown (PRIMARY)
    Thanks,
    Rakesh

    HI CKPT,
    Thanks for the reply. All the Archives from primary are transferred to the standby by RFS. Also i tried to register the log files manually even but it says already registered. They are no errors in the primary instance alert log file. Please find the log
    SEVERITY ERROR_CODE MESSAGE TO_CHAR(TIMESTAMP,'D
    Informational 0 ARC0: Archival started 20-MAR-2012 06:51:36
    Informational 0 ARC1: Archival started 20-MAR-2012 06:51:36
    Informational 0 ARC0: Becoming the 'no FAL' ARCH 20-MAR-2012 06:51:36
    Informational 0 ARC0: Becoming the 'no SRL' ARCH 20-MAR-2012 06:51:36
    Informational 0 ARC1: Becoming the heartbeat ARCH 20-MAR-2012 06:51:36
    Informational 0 Redo Shipping Client Connected as PUBLIC 20-MAR-2012 06:52:07
    Informational 0 -- Connected User is Valid 20-MAR-2012 06:52:07
    Informational 0 RFS[1]: Assigned to RFS process 15934 20-MAR-2012 06:52:07
    Informational 0 RFS[1]: Identified database type as 'physical standby' 20-MAR-2012 06:52:07
    Warning 0 RFS[1]: No standby redo logfiles created 20-MAR-2012 06:52:07
    Control 0 Attempt to start background Managed Standby Recovery process 20-MAR-2012 06:52:42
    Control 0 MRP0: Background Managed Standby Recovery process started 20-MAR-2012 06:52:42
    Informational 0 Managed Standby Recovery not using Real Time Apply 20-MAR-2012 06:52:47
    Informational 0 Media Recovery Log /oracle/STDBY/arch/1_3_777567883.d 20-MAR-2012 06:52:49
    bf
    Control 0 MRP0: Media Recovery Complete 20-MAR-2012 06:53:04
    Control 0 MRP0: Background Media Recovery process shutdown 20-MAR-2012 06:53:06
    Informational 0 Managed Standby Recovery not using Real Time Apply 20-MAR-2012 06:53:24
    Control 0 Media Recovery Complete 20-MAR-2012 06:53:43
    Control 0 Attempt to start background Managed Standby Recovery process 20-MAR-2012 06:54:55
    Control 0 MRP0: Background Managed Standby Recovery process started 20-MAR-2012 06:54:55
    Informational 0 Managed Standby Recovery not using Real Time Apply 20-MAR-2012 06:55:00
    Informational 0 Media Recovery Log /oracle/STDBY/arch/1_3_777567883.d 20-MAR-2012 06:55:01
    bf
    Control 0 MRP0: Media Recovery Complete 20-MAR-2012 06:55:17
    Control 0 MRP0: Background Media Recovery process shutdown 20-MAR-2012 06:55:18
    Informational 0 Redo Shipping Client Connected as PUBLIC 20-MAR-2012 07:31:03
    Informational 0 -- Connected User is Valid 20-MAR-2012 07:31:03
    Informational 0 RFS[2]: Assigned to RFS process 16366 20-MAR-2012 07:31:03
    Informational 0 RFS[2]: Identified database type as 'physical standby' 20-MAR-2012 07:31:03
    Warning 0 RFS[2]: No standby redo logfiles created 20-MAR-2012 07:31:04
    Warning 0 RFS[2]: No standby redo logfiles created 20-MAR-2012 07:31:06
    Control 0 Attempt to start background Managed Standby Recovery process 20-MAR-2012 07:31:32
    Control 0 MRP0: Background Managed Standby Recovery process started 20-MAR-2012 07:31:32
    Informational 0 Managed Standby Recovery not using Real Time Apply 20-MAR-2012 07:31:37
    Informational 0 Media Recovery Log /oracle/STDBY/arch/1_3_777567883.d 20-MAR-2012 07:31:38
    bf
    Control 0 MRP0: Media Recovery Complete 20-MAR-2012 07:31:54
    Control 0 MRP0: Background Media Recovery process shutdown 20-MAR-2012 07:31:55
    36 rows selected.
    SQL> archive log list;
    Database log mode Archive Mode
    Automatic archival Enabled
    Archive destination /oracle/STDBY/arch/
    Oldest online log sequence 13
    Next log sequence to archive 0
    Current log sequence 14
    SQL> ho ls -ltra /oracle/STDBY/arch/
    total 3754456
    drwxr-xr-x 4 oracle dba 4096 Feb 13 17:38 ..
    -rw-r----- 1 oracle dba 908516864 Mar 20 06:37 1_8_777567883.dbf
    -rw-r----- 1 oracle dba 770419200 Mar 20 06:40 1_3_777567883.dbf
    -rw-r----- 1 oracle dba 757698048 Mar 20 06:41 1_4_777567883.dbf
    -rw-r----- 1 oracle dba 5171712 Mar 20 06:41 1_5_777567883.dbf
    -rw-r----- 1 oracle dba 1060801024 Mar 20 06:43 1_6_777567883.dbf
    -rw-r----- 1 oracle dba 323025920 Mar 20 06:43 1_7_777567883.dbf
    -rw-r----- 1 oracle dba 1558016 Mar 20 06:43 1_9_777567883.dbf
    -rw-r----- 1 oracle dba 4608 Mar 20 06:43 1_10_777567883.dbf
    -rw-r----- 1 oracle dba 1579008 Mar 20 06:52 1_11_777567883.dbf
    -rw-r----- 1 oracle dba 11876864 Mar 20 07:31 1_12_777567883.dbf
    -rw-r----- 1 oracle dba 2560 Mar 20 07:31 1_13_777567883.dbf
    drwxr-xr-x 2 oracle dba 36864 Mar 20 07:31 .
    SQL>

  • Logical standby database to physical standby database

    I already start my logical standby database and I want to return it again to physical standby database. So what should I do?

    >
    The "may be" is because I have tested flashback of a physical standby to before resetlogs, but not a logical standby.
    >
    A physical standby keeps the DBID of the primary - a logical standby does not. That is exactly the problem that restricts the reconversion into physical from logical, and you did not encounter that problem.
    >
    I haven't used "keep identity" but from what I read it relates to "convert to physical" not "flashback database".
    >
    Exactly. And that is what the OP wants to do: convert to physical (from logical).
    You mentioned that this might be possible with flashback.
    Problem: During the conversion from physical to logical, the DBID gets changed unless you specify (in 11g) KEEP IDENTITY. This would make it possible to reconvert into phyiscal from logical.
    In short: If there is no solution for the changed DBID of the logical standby in order to flashback it into physical as you suggested, then it is not possible .
    When I saw your first answer, I thought that you might have a solution in mind in order to solve that obvious problem. Sorry for having bothered you.
    Kind regards
    Uwe
    http://uhesse.wordpress.com

  • Starting Physically Standby Database in Mount Mode

    Hi All
    I have configured Data Guard using Oracle 10g 10.2.0.4.0 (64 bits) on Windows 2008 Server (64 bits) Release 2 Enterprise.
    Data guard configuration was OK as the message from "Enable Configuration DG1" was "SUCCESS" for both
    Primary and Standby Database. I have also set both Databases and TNS to start Automatically whenever Windows Starts.
    The Problem is as long as the Standby Server is running, there is No issue.
    But when we Restarts the Backup Server, Physically Standby Database is Started and TNS is also Started,
    but Archives  are not received until I physically do the following steps so that it can received the Archives.
    SQL> startup nomount;                                                                                                                
    SQL> alter database mount standby database;                                                                 
    SQL> alter database recover managed standby database disconnect from session;
    Is there a way to start Physically Standby Database in Mount mode when windows started.
    Regards
    Thunder2777

    Hi Mihael
    I have created 2 files. 1 Bat file 2nd sql file which contains all commands as written above.
    When I execute start.bat file
    1. set ORACLE_HOME=C:\oracle\product\10.2.0\db_1
    2. set ORACLE_SID=UMISBK
    3. sqlplus / [email protected]
    1 & 2 executed properly. At 3 it just display SQL help for login as shown below.
    SQL*Plus: Release 10.2.0.4.0 - Production
    Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.
    Usage 1: sqlplus -H | -V
        -H             Displays the SQL*Plus version and the usage help.
        -V             Displays the SQL*Plus version.
    Usage 2: sqlplus [ [<option>] [<logon>] [<start>] ]
      <option> is: [-C <version>] [-L] [-M "<options>"] [-R <level>] [-S]
    It Did Not execute start.sql file to excute sql commands.
    Regards
    Thunder2777

  • How to open a "manual" Physical standby database in read/write mode

    Hi,
    I am running Oracle Database 10g Release 10.2.0.3.0 - 64bit Production Standard Edition on Linux version 2.6.9-42.0.8.ELsmp ([email protected]) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3))
    I've created a physical standby database, but since I am running Standard Edition, I am not using the DataGuard features. I use the rsync utility to copy over the archivelogs to the standby database, and I apply them periodically to the standby database.
    The standby database is started this way :
    startup nomount pfile='/u01/oradata/orcl/initorcl.stdby';
    alter database mount standby database;
    Everything runs perfectly fine, I can do "alter database open read only" and then I can do selects into tables to confirm that everything is up to date.
    The thing is, if I shutdown immediate the database, then do just startup :
    shutdown immediate;
    startup;
    The database opens with no error messages, but is still in read-only mode...
    I read that the default behavior for a standby database is to open read-only, like I am experiencing, but I would like to know what is the right way to open it correctly in read-write mode (I understand that after that, my standby will not be standby anymore and that I will have to recreate my standby database).
    Thanks,
    Mat

    Hello,
    There're features which allows you to open a Standby database in Read/Write mode but for all I know
    it needs Entreprise Edition.
    In Enterprise Edition you can use Logical Standby database. More over, for Physical standby there's
    a way by using flashback database so as to rolling backward the database and avoiding to recreate
    the Standby.
    In Standard Edition I'm afraid that you'll have to recreate your Standby database.
    Best regards,
    Jean-Valentin

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