DataGuard - Standby Redo Log Files
Sep 3, 2012What is the purpose of Standby Redo Log Files in Data Guard configuration? When it is utilized by the database?
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Data Guard :: How To Transfer Redo Log Files To Standby Database
May 29, 2010How to transfer redo log files to standby database..
View 1 Replies View RelatedData Guard :: How To Add Both Online And Redo Log Files To Standby Database
Sep 13, 2011I've only successfully duplicate a standby database.
from the alert log
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: 'D:ORA102CTAREDO01.LOG'
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
[code].....
when I tried to add the online and standby redo log, it error out
SYS@CTA>select logdetail.member, loggroup.group#, loggroup.sequence#, loggroup.archived, loggroup.status lg_status, logdetail.status ld_detail, logdetail.type
2 from v$log loggroup join v$logfile logdetail
3 on loggroup.group# = logdetail.group#;
MEMBER
--------------------------------------------------------------------------------
GROUP# SEQUENCE# ARC LG_STATUS LD_DETA TYPE
---------- ---------- --- ---------------- ------- -------
[code].....
based on my understanding from [URL] ....
Quote:
As part of the duplicating operation, RMAN automates the following steps:
Creates a control file for the duplicate database
Restores the target datafiles to the duplicate database and performs incomplete recovery by using all available incremental backups and archived redo logs
Shuts down and starts the auxiliary instance (refer to "Task 4: Start the Auxiliary Instance" for issues relating to client-side versus server-side initialization parameter files)
Opens the duplicate database with the RESETLOGS option after incomplete recovery to create the online redo logs (except when running DUPLICATE ... FOR STANDBY, in which case RMAN does not open the database) when duplicating for standby database it does not create online redo logs. Duplicating a standby database does not creates online redo logs.
how should I add the online and standby redo logs. If I transfer the redo logs from primary to standby, it always encountered the the following error
Dump file d:ora102ctadumpcta_arc0_3624.trc
Tue Sep 13 19:21:53 2011
ORACLE V10.2.0.4.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the OLAP, Data Mining and Real Application Testing options
Windows XP Version V5.1 Service Pack 2
[code].....
Data Guard :: Apply Standby Redo Log To Physical Standby Database
May 26, 2013I have dataguard configuration operating in maximum availability mode with a local standby db (A - lgwr sync not using real time apply) and a remote standby db (B - lgwr async). I then simualted a crash of my primary database with batch jobs running. Since the stby db A is in lgwr sync option ,all the commited data in the current online redo log has been transmitted to stby A and is present in its stby redo log (Group 2).How do I apply this stby redo log to the remote stby db.
Tried the following methods.
1.ftp the stby redo log to the remote db and tried to regiter it, got an error that it is not completely archived.
2.issued the recover standby database command and supplied the stby redo log when it asked for the sequence in the stby redo, got an error saying there is corruption in a block(tried this option multiple times ended up with the same result.)
Dataguard Setup Primary And Standby
Dec 2, 2011I have a dataguard setup, a primary and a standby.my instance is testdb.i have set all necessary dataguard parameters and everything seemed to work well initially with logs being moved from primary to secondary and being applied there.but all of a sudden i see that the primary pushes logs to the standby and at the standby end these logs are available but not applied.
when i try to execute the: alter database recover managed standby database cancel; it hangs for a long time and never returns to sql prompt.
i bascially want to stop and restart the MRP process to apply the logs but cannot cancel the managed recover mode.Is it advisable to kill the mrp process at os level using "kill -9 "?
Data Guard :: Standby Redo Log On Standby
Apr 24, 2011GROUP# THREAD# SEQUENCE# sizeMB ARC STATUS T
---------- ---------- ---------- ---------- --- ---------------- -
1 1 115 512 YES CLEARING O
2 1 116 512 YES CURRENT O
6 1 114 512 YES CLEARING O
4 1 112 512 YES CLEARING O
5 1 113 512 YES CLEARING O
3 1 111 512 YES CLEARING O
6 rows selected.
[code]...
Above result is from standby database.I am trying to understand the concept of standby redo log.My stadby database protection_mode is MAXIMUM PERFORMANCE.
Dataguard / Logs Not Shipped To Standby With Error
Oct 26, 2010I have two Oracle 10.2.0.4 databases, on two SUN M5000 (Solaris 5.10). One is primary (EXP1), the other is the standby (EXPBKP). Both SID is 'EXP'. If I do a manual recover (after I sync'ed primary archive logs from primary to standby), it works. If I do a manual log switch, logs are shipped AND applied on the standby. But after a while, I can see some errors on primary alert log , and logs are not shipped anymore :
CODE Errors in file /applications/oracle/admin/EXP/bdump/exp_arc2_1277.trc:
ORA-03135: connection lost contact
Tue Oct 26 08:30:14 2010
FAL[server, ARC3]: FAL archive failed, see trace file.
Tue Oct 26 08:30:14 2010
Errors in file /applications/oracle/admin/EXP/bdump/exp_arc3_1279.trc:
ORA-16055: FAL request rejected
ARCH: FAL archive failed. Archiver continuing
[code]....
Data Guard :: Difference Between Standby And Dataguard
Jun 29, 2010Difference between standby and dataguard. I assume standby and dataguard are same?
View 4 Replies View RelatedORA-01109 - Setup 11g Dataguard - Physical Standby
Jul 12, 2011I have setup 11g Dataguard - physical standby. Everything seems to be fine. I have also tested switchover and failover using DG broker which seems to work fine.All, I would like to know is abt ORA-01109 during switchover..
My config - RACprim- RACstby
Primary - TEST_prim (instances - TEST1, TEST2)
Standby - TEST_stby (instances - TEST1, TEST2)
DGMGRL> SWITCHOVER TO TEST_stby;
Performing switchover NOW, please wait...
New primary database "TEST_stby" is opening...
Operation requires shutdown of instance "TEST1" on database "TEST_prim"
Shutting down instance "TEST1"...
ORA-01109: database not open
[code].....
This ORA error occurs when it tries to shut down primary. When primary is in open state, why its saying that database not open. Operation requires shutdown of instance "TEST1" on database "TEST_prim"..Shutting down instance "TEST1"..
DataGuard - Archive Log Apply Gap In Physical Standby Database
Nov 23, 20101) The Primary Database is UP. The Physical Stand By Database is DOWN. The Current Archive Log Sequence is 99 in Primary.
We have to apply Archive Log from 51 to 99 to the Standby Database. But Unfortunately, there is no backup of those Archivelogs and the ArchiveLogs from 51 to 98 have got deleted at Primary end.
Now how will you apply these Archive Logs from Primary Database to Physical Standby Database?
Note : The Physical StandBy Database is DOWN.
Recovery Manager (RMAN) :: Duplicate On Active Dataguard Physical Standby
Feb 8, 2013In DR site. i have to clone the database from pshysical standby database and clone db will be normal db not standby. Is it possible to do rman duplicate from active dataguard? will it support the duplicate database from active database or i have to take the rman backup of standby database and duplicate from backup piece.
View 2 Replies View RelatedUnable To Find Redo Log Files Specified?
Jul 15, 2011I am creating database instance from template. I have specified the location of redo log files. When I run the dbca utility it does creates the redo log files in specified directory. But the installation fails . When I checked the trace file. it says unable to locate the specified file(redo.log). But when i check in directory they are created.
I am using windows 32 bit oracle 11g
Add Changed Rows To Redo Log Files
Aug 29, 2012I learned that Oracle uses supplemental logging mechanısm to add the changed rows to redo log files and identify the changed rows on target replication database? Is that mechanism mandatory to handle the replication of data between updated and back up databases?
View 1 Replies View RelatedData Guard :: Unable To Get Data Of Primary In Standby Database (dataguard)
Jan 16, 2013i have configured physical standby in my local system, to check logshipping i created a table at primary db, wen i tried to check in standby, it says table does not exist..below are primary & standby alert entries..
Primary alert log
Fatal NI connect error 12514, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.0.98)(PORT=1522))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=STAND)(SERVER=dedicat ed)(CID=(PROGRAM=d:oracle11gappadministratorproduct11.1.0db_1inORACLE.EXE)(HOST=A960M)(USER=SYSTEM))(SERVER=dedicated)))
VERSION INFORMATION:
TNS for 64-bit Windows: Version 11.1.0.6.0 - Production
[code]....
Server Administration :: Contents Of Redo Log Files
Feb 1, 2011I have some doubts about redo log files,
1) Can we fetch 'select statements' from redo log files through the use of log miner utility or any other?
(I think redo log file contains only insert,update,delete and DDL/DCL commands only)
2) If "No" to the above answer then how can i fetch all select statements fired on the system for a day or particular time.
(setting of sql_trace may be the one of them, but can it be possible for system level)
Backup And Recovery Session - Redo Log Files
Jul 2, 2012In the backup and recovery session i have miss my online redolog files. why the datafiles are recovered.it's possible to recovered to online redo logs?
View 3 Replies View RelatedMultiplexing Redo Logs And Control Files To Separate Diskgroup In ASM
Mar 1, 2011I've been using ASM for a few years now and have always installed a new system with 3 diskgroups
+DATA - for datafiles, control files, redo logs
+FRA - for achive logs, flash recovery. RMAN backup
Those I guess are the standards, but I've always created an extra (very small) diskgroup, called +ONLINE where I keep multiplexed copies of the redo logs and control files.
My reasoning behind this is that if there are any issues with the +DATA diskgroup, the redo logs and control files can still be accessed.
In the olden days (all those 5 years ago!), on local storage, this was important, but is it still important now? With all the striping and mirroring going on (both at ASM and RAID level), am I just being overtly paranoid? Does this additional +ONLINE diskgroup actually hamper performance? (with dual write overheads that are not necessary)
Data Guard :: Apply Redo While Standby Open In Read Only Mode?
Apr 9, 20131) If i do changes in table on primary database and if i open standby database in Read-Only mode, i can see those changes immediately only if Real Time Apply is enabled. Am i correct? Database version is 10.2.0.4
2) From 11g, It is possible to apply redo while the standby is open in read only mode. prior to 11g, it was not possible. Right?
3) Should I first cancel Managed Recovery prior to issuing “ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY”?
Backup & Recovery :: Restore From Newer Control File And Archived Redo Log Files?
Mar 29, 2011I've got a legacy SAP system with oracle 8i on Tru64. No changes at all are made but for legal reasons we have to keep it up and running.
we currently do a full backup monthly by shutting down oracle and doing a backup of all the files to tape and that takes around 12 hours.
If I stop doing the full backup and I only backup the control file and the archived redo log files every month and I had to restore the full database years from now, would I be able to restore the database using the last full monthly backup and use the latest control file and archived redo log files?
Standby Data Files - Production Database?
Jul 24, 2012: I noticed three data files on my standby show's they are corrupted. What will be the easy and fast way to sync them up from my production database?
View 1 Replies View RelatedMoving Files On Physical Standby Database?
Oct 19, 2011We're currently in a situation where the primary database server fs size does not match the standby database server fs size.
Standby database filesystem is almost 100% utilized, and we suggested to move some of the datafiles first to avoid threshold alerts and archive gaps.
Now, if we're gonna move datafiles on the physical standby, I believe the process would be stop managed redo apply -> shutdown standby -> OS move -> startup mount -> alter rename -> start managed redo apply. Is this correct? If not, how?
Also, would it have an effect if the controlfiles of primary and standby do not match because of the movement?
Data Guard :: Transfer Archived Log Files To Standby Database
Oct 8, 20111> Does dataguard in 10g use ftp/rsh to transfer archived log files to standby database or some other protocol?
2> In my primary database, archives are getting generated normally, there is no error in alert log file. But archives are not getting transferred to standby database. I am able to connect through sys user from primary server to standby database & vice versa.
Also, tnsping is working fine.
All was working fine till 2 days back & no parameter has been changed from database side. I am not able to transfer the file manually through FTP to standby server. Does it is the problem? Or dataguard doesnt use FTP protocol to transfer the files?
Data Guard :: Standby Database Temp Files Go Missing?
Jun 5, 2013I performed a switchover test of my Exadata databases last night. Both databases are running 11.2.0.2 (BP7) on top of GI of the same version.I'm using Data Guard Broker to administer the Data Guard configuration.
I have, as you'd expect, the standby_file_management set to AUTO, so any file changes/additions/deletions that are made on Primary should be applied to Standby also.And they have been. Until last night.
When I had switched over to running Primary on the Standby site, I got this error message:
Tue Jun 04 22:27:12 2013
Errors in file /u01/app/oracle/diag/rdbms/exdw1pdg/exdw1pdg1/trace/exdw1pdg1_ora_26630.trc:
ORA-25153: Temporary Tablespace is Empty
I checked and my two temp tablespaces existed, but had no files in them. These files are 200Gb and 448Gb in size, so you'd think you'd notice them going missing. This wasn't by any means the first time we switched over (and, yes, I did create temp files for Standby when I built it and first switched over)
We've switched over to Standby multiple times and even ran a whole day's processing against it and haven't seen this. Ultimately, it wasn't a big deal, because I just created a tempfile for each of the tablespaces and off we went.Nothing in MOS seems to mention something like this. Basically, it looks like the switchover process decided to eat my tempfiles but keep my temp tablespace defintion. Odd.
SQL & PL/SQL :: How To Configure RAC TO RAC Dataguard
Apr 27, 2012i want to configure rac to rac dataguard 10g( primary is having 2 nodes and standby also 2 nodes).
oracle 10g/os linux5.
Dataguard Log Query
Dec 3, 2012This is my dataguard check script:
/home/oracle/bin/check
if [ $# -lt 1 ]; then
echo "usage: check <oracle_sid>"
echo
exit
fi
[Code]...
This is the output it gives on the primary:
INSTANCE_NUMBER INSTANCE_NAME
--------------- ----------------
HOST_NAME
----------------------------------------------------------------
VERSION STARTUP_T STATUS PARTHREAD# ARCHIVE LOG_SWITCH_WAIT
----------------- --------- ------------ --- ---------- ------- ---------------
LOGINS SHU DATABASE_STATUS INSTANCE_ROLE ACTIVE_ST BLO
---------- --- ----------------- ------------------ --------- ---
1 prod
xxxx
11.2.0.3.0 29-NOV-12 OPEN NO 1 STARTED
ALLOWED NO ACTIVE PRIMARY_INSTANCE NORMAL NO
[Code]....
SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options
This is the output it gives on the standby:
INSTANCE_NUMBER INSTANCE_NAME
--------------- ----------------
HOST_NAME
----------------------------------------------------------------
VERSION STARTUP_T STATUS PARTHREAD# ARCHIVE LOG_SWITCH_WAIT
----------------- --------- ------------ --- ---------- ------- ---------------
LOGINS SHU DATABASE_STATUS INSTANCE_ROLE ACTIVE_ST BLO
---------- --- ----------------- ------------------ --------- ---
1 prod_stby
xxxx
11.2.0.3.0 29-NOV-12 MOUNTED NO 1 STARTED
ALLOWED NO ACTIVE PRIMARY_INSTANCE NORMAL NO
[Code]....
SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options
When I run the following:
SQL> select archivelog_change#-1 from v$database;
On the primary I get:
ARCHIVELOG_CHANGE#-1
--------------------
4902447998
On the standby:
ARCHIVELOG_CHANGE#-1
--------------------
4902447999
Which makes sense to me as my understanding of this is that the log is written, send to the standby, applied, then applied on the primary, yes?
So my questions are:
Why is there a lower entry on the primary (234) marked as opening, when it's closing 235, and writing 236, what does LNS mean?
Why is the second archive on the standby saying "CONNECTED 0" and do RFS, & MPR0 mean?
My init files say this:
Primary:
log_archive_dest_1='LOCATION=/u01/archive/prod/arch'
log_archive_dest_2='SERVICE=prod_stby LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=prod_stby'
Standby:
log_archive_dest_1='LOCATION=/u01/archive/prod_stby/arch'
log_archive_dest_2='SERVICE=prod LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=prod'
Geek, scruff, economics wonk, a mind forever voyaging.
Active Dataguard Database
Jul 17, 2013I've got a physical standby database and I'm now licensed for Active DataGuard. I would like to automate the ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION command to be executed right after the STARTUP command so that whenever the database is started by our DBSTART script, it activates READ ONLY W/APPLY immediately after start without manual intervention. This is probably simple, but I figured I'd ask before starting to pore through documentation.....!
View 6 Replies View RelatedUses Of ORAPWD In RMAN And Dataguard
Aug 29, 2012I know the uses of ORAPWD utility and REMOTE_LOGIN_PASSWORDFILE initialization parameter.I wish to know that, what will be the primary purpose of using ORAPWD passwordfile in the following situations.
1. RMAN Cloning.
2. Dataguard Standby configuration.
SQL Script Validation For Use In Dataguard Environment?
Feb 21, 2013We have a 10g environment with DataGuard running for reporting purposes. Our application team is getting ready to upgrade their application and it requires that several SQL Scripts be run to perform the primary database updates. A couple of them are over 1 MB in length. My concern is that these scripts will break DataGuard. I am not a DBA by any stretch, but I seem to remember there are certain limitations with DataGuard.
I have reached back to the team and asked them to have the Vendor confirm these scripts are validated for a DataGuard environment and I have also reached out to the System DBAs for review. I am wondering if there is an utiility available that can check the SQL to confirm if there are any DDL or DML statements that will not work in DataGuard. Likewise, we are going to run these scripts in a non-production DataGuard enabled environment first, but I want to have some level of confidence, that this will be a success.
Exadata :: Configuring Dataguard With DR Server And DBM
Oct 10, 2012Refer a MOS Note for configuring data-guard on Exadata with DR server being and Exadata DBM too.
View 4 Replies View RelatedData Guard :: Possible To Convert Logical Standby To Physical Standby
Aug 30, 2013My steps for testing as below:
1.create a primary database
2.duplicate a physical standby database;
3.turn on flashback on both databases.
4.record SCN xxx on physical standby database.
5.convert physical standby to logical standby (using keep identity statement)
6.flashback to logical standby to xxx
7.convert logical standby to physical standby
8.using real time apply I got errors: Fast Parallel Media Recovery enabledManaged Standby Recovery starting Real Time ApplyMRP0:
Background Media Recovery waiting for new incarnation during transient logical upgrade procedure
Errors in file /home ora/ app/ oracle/ diag/ rdbms/ ora11gr1dg/ora11gr1dg/trace/ora11gr1dg_mrp0_10120.trc:ORA-19906: recovery target incarnation changed during recoveryManaged Standby Recovery not using Real Time ApplyErrors in file /home/ ora/app/ oracle/diag/ rdbms/ ora11gr1dg/ ora11gr1dg/ trace/ora11gr 1dg_mrp0_ 10120.trc:ORA-19906: recovery target incarnation changed during recovery
Errors appears every 10 seconds. Seems MPR0 is waiting for new incarnation for a long time. So am I.Standby database incarnation:
List of Database IncarnationsDB Key Inc Key DB Name DB ID STATUS Reset SCN Reset Time-------1 1 ORA11GR1 3853851354 CURRENT 1 08/09/2013 01:02:182 2 ORA11GR1 3853851354 ORPHAN 2127877 08/28/2013 19:22:01 BGV
