Data Guard :: Replication From Many To Single Database
Jan 12, 2011
I have a clients who currently implementing an application that using Oracle 10g in 20 distributed location. Each location will have its own database server and locally managed. I plan to create a Disaster Recovery (DR) Centre for this client in centralised location. I plan to setup 20 Application Server but only one database server with 20 instances. My question, can the Dataguard manage the replication between 20 database (with single instances) and single database (with 20 instances? The reason we design such way is to reduce the license cost of Oracle.
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Sep 16, 2009
I would need to create a physical standby database for DR without using data guard. I like to know in more details like
1. What would be required to switch over to standby database in case of failure of primary database? Is it going to be a manual process each time, or can be automated using scripts?
2. How the archive logs will be applied to standby database in timely manner to sync with primary database?
3. How the Primary database will be synch with Standby database once the issue resolved on primary database.
4. Where do I get a complete script to create physical standby database on Windows platform?
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Mar 27, 2013
I am using Oracle RAC 11.2.0.3 as primary database, we are going to start using Oracle data guard. So I am designing my infrastructure and planing to use Oracle 11.2.0.3 Single instance as my physical stand by database.
My question is it feasible to have my standby database as single instance while the primary is RAC? is it feasible to build my Oracle single instance standby database from the RMAN backup of the RAC primary database? Is there any restrictions (or any points to be taken into consideration) since my primary database is RAC while the physical standby is Oracle single instance?
in the below link
[URL].......
it was mentioned that primary can be RAC or single and same for standby, but my question is it feasible to have primary as RAC while standby as single instance? or it should be like each others?
The primary database can be either a single-instance Oracle database or an Oracle Real Application Clusters (RAC) database. Similar to a primary database, a standby database can be either a single-instance Oracle database or an Oracle RAC database.
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Feb 17, 2011
There is a Single Instance production server Oracle 9iR2 [9.2.0.8] OS HP-UX PARISC 11i v1 to RAC.
Now we want to migration this server with minimum downtime to Oracle 11gR2 [11.2.0.2] in RAC environment OS HP-UX 11i v3 Itanium DOwn time must be minimum. what will be the procedure ?
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Mar 2, 2011
Primary:
2 NODE RAC Cluster/Linux x86-64/11.1.0.7.4 RDBMS
Standby server:
Brand new box, and I installed 11.1.0.6 (software only)
I have a brand new box set-up for a single-instance standby database, and I have installed 11.1.0.6 software only.
Do I need to patch 11.1.0.6 to 11.1.0.7 before I send a copy of the primary over to be set-up as a standby? If so, how do I patch 11.1.0.6 without having a local database in place as this server will only be used for a standby? Can patching the oracle_home only be done?
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Jul 24, 2012
I am not able to find any document that shows steps to create a SINGLE INSTANCE LOGICAL STANDBY database for a 2 NODE ORACLE RAC database. I have found documents for RAC to Single Instance Physical standby database. But not for Logical Standby.
Details:
OS: Redhat 5
DB: 10.2.0.4(shared file system, not using ASM/Standby also file system)
Status: Single instance physical standby database created, need to convert it to Logical standby.
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Oct 17, 2012
Controlling User Access to Tables in a Logical Standby Database can be controlled using the following command:
ALTER DATABASE GUARD STANDBY;
My simple question is: how can I know the current active Guard setting in the standby database?
Oracle 11g R2.
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Jul 1, 2010
Is it possible to use oracle dataguard from single instance to RAC instance ? Does Oracle dataguard support this ?
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Apr 22, 2011
I got a primary database with a logical standby database running Oracle 11g. I got two client applications, one is the production site pointing to the primary one, another one is just a backup site pointing to the logical one.Things will only be written into the primary database every mid night and client applications can only query the database but not add, update nor delete.And now, I want to apply the latest patch on both of my databases. I am also the DNS administrator, I can make the name server pointing to the backup site instead of the production one.I want to firstly apply the patch on the logical one, and then the physical one.
I found some reference which explains how to apply patches by adopting "Rolling Upgrade Method". however, I want to avoid doing any "switch over" mentioned in the reference because I can make use of name server. Can I just apply patches as the following way?
1)Stop SQL apply
2)Apply patches on logical standby database
3)let the name server point to the backup site
4)Apply patches on the primary database
5)Start SQL apply
6)Let the name server point back to the production site
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Aug 30, 2013
If flashback is enable in physical standby database 1. If we failover at 11AM can I flash back NEW primary database to 6 AM ? 2. if I convert physically standby database to snapshot standby database at 11AM , Can I flashback snapshot standby database to 6 AM and do some works on it (DML operations) then converting the snapshot standby database into physical standby database ?
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Dec 21, 2012
creating the standby database from Active database using RMAN and getting the below issue after i executed the duplicate command.
Version of Database:11g(11.2.0.1.0)
Operating System:Linux 5
Error:
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 12/21/2012 17:26:52
RMAN-03015: error occurred in stored script Memory Script
RMAN-04006: error from auxiliary database: ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
[code]....
provide any work arounds to proceed further in creating the standby database.
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Jan 30, 2013
I have installed oracle 11g standard edition one and created both primary and standby database. now i want to know how to switch(convert) primary database to standby database.
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Jan 16, 2013
i 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]....
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Oct 9, 2012
Here we have a data guard environment with db1(db_unique_name) as primary and db2(db_unique_name) as physical standby database. Also we configured one schema on a third machine as catalog database using following steps. The steps executed in catalog database(appsdb):
SQL> create tablespace rmancatlog_tbs datafile '/u01/app/oracle/oradata/NEW/rman_catalog.dbf' size 500M autoextend off extent management local segment space management auto;
SQL> create user rman identified by oracle
2 default tablespace rmancatlog_tbs
3 quota unlimited on rmancatlog_tbs
4 ;SQL> GRANT connect, resource, recovery_catalog_owner TO rman;
RMAN> create catalog;
recovery catalog created
Added tns entries of catalog database in primary and standby. Then from primary database we tried to register to catalog database. It is showing that it is registering. But every query afterwards in rman is throwing the error. Below are the steps and error:
[oracle@db1 ~]$ rman target sys/oracle catalog rman/oracle@appsdb
Recovery Manager: Release 10.2.0.3.0 - Production on Mon Aug 13 21:39:32 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: NIOS (DBID=1589015669)
connected to recovery catalog database
[code]....
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Jan 16, 2013
I configured dataguard in my local system.
1) scn differs wrt primary in standby (i checked, 1day difference), how to make scn same?
2)i created a table in primary, its not refelecting in standby, (below i ve pasted alertlog entries)
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Errors in file d:oracle11gappadministratordiag
dbmsstandstand racestand_dbw0_6916.trc:
ORA-01157: cannot identify/lock data file 2 - see DBWR trace file
ORA-01110: data file 2: 'D:ORACLE11GAPPADMINISTRATORORADATASTANDSYSAUX01.DBF'
[code]....
3)wen i try to open standby database in read only mode gives below error..
ERROR at line 1:
ORA-16004: backup database requires recovery
ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1:
'D:ORACLE11GAPPADMINISTRATORORADATASTANDSYSTEM01.DBF'
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Sep 7, 2010
we have four location, four database server separately, we need to synchronize all the servers.
for example. all the server having table parts. if the parts_count column change in server. it should be change all the four servers.
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Jan 11, 2011
I want to replicate single table data/modification from source db to destination DB.procedure or steps how to create replication between source and dest db for single table.
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Sep 4, 2009
i need to set up a central server with all the master tables and two other local database which will hold the updatable materialized view of the master table...the databases must be synchronized with central server..and user will work on the materialized view database...
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Mar 14, 2012
I want to get the execute plan of a sql in standby database(read only),but failed,how can i do?
SQL> explain plan for select count(1) from hxl.tb_objects;
explain plan for select count(1) from hxl.tb_objects
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 2
ORA-16000: database open for read-only access
SQL> select count(1) from hxl.tb_objects;
COUNT(1)
----------
22238018
SQL> select open_mode from v$database;
OPEN_MODE
----------
READ ONLY
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Mar 10, 2010
I have two node rac running on SAN with ASM , i want to configure a single instance standby database for this.
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Jul 8, 2011
To have physical standby database, the hardware and software versions should be same, including patch sets?
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Oct 17, 2012
I wanted to know whether we can configure single data guard for multiple database (instances), has this been done anytime in the past .
We are a small business and growing at rapid rate. we want to cut down the cost at the same time.
Any other method or approach that is practical and economical to synchronise database between multiple production system into centralised DR system.
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May 26, 2012
The GAP archived log can not transport to target database by auto, how can i do?
Sun May 27 06:32:59 2012
FAL[client]: Failed to request gap sequence
GAP - thread 1 sequence 161-161
DBID 1820932955 branch 775456988
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.
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Sep 17, 2012
DB1 <Primary> - Production
DB2 <Physial Standby> - DR
I will need to startup my DB2 in DR segment for testing.If i perform the below, will it affect my Production DB? I need it to be up and running as well.
DR:
recover managed standby database cancel;
shutdown immediate;
startup nomount;
alter database mount standby database;
recover standby database until cancel;
alter database activate standby database;
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Sep 14, 2010
I am planning to use Data Guard facility in Oracle 10g database.
1) I would like to have a standby database, which can be used if the primary goes down and also for reporting and other queries (read-Only).
2) What is the difference between Physical and Logical standby database. I have to explain non-technical users (management) regarding this.
3) What is Sync and Async redo log apply?
4) When i manipulate data (Insert,Delete,Update) in logical standby database, will these changes reflect in Primary database synchronously?
5) Which type of REDO APPLY is better: Managed Recovery Process(MRP) or Real Time Apply(RTA)?
6) can the redo data be deleted if its obsolete or is it deleted automatically by oracle?
7) If i want to take backup, should i take it from primary or standby database? If standby, then the database should be in which mode (Read-only or Recovery Mode)
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Sep 7, 2012
Oracle RDBMS 11.2.0.2 on RHEL 5.6.
I need to drop standby database completeley and rebuilt physical standby for the same database. We identified there are lot of inconsistencies between primary and standby. How do i need to remove the standby? And what is the best procedure?
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Dec 7, 2010
I was able to create the standby database on different server with the same name for the primary and standby database but I want to know that can I create a standby database with different database name than that of the primary database server.
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Oct 1, 2012
we have a created primary and physical standby databases. Before the switchover the application connected to dataguard allows updates on the database. However after the switchover, it allows read-only access and we are unable to update. Any comments prima-facie ?
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Apr 19, 2011
During data guard configuration i have receive an error while connecting to stanby database from primary database rman prompt.
rman target sys/srk786@orcli
Recovery Manager: Release 10.2.0.1.0 - Production on Tue Apr 19 09:59:26 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
connected to target database: ORCLI (DBID=3754068166)
RMAN> connect auxiliary sys/srk786@stnd
[code]....
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Feb 2, 2013
I was using physical standby but my primary database had had some HW issue.So I had activated standby database to handle production.During 3 months, standby database was our live database and our old primary was unavailable.Now HW issue on primary has been fixed.And I want to set again my old configuration : means set primary and standby db.
I'm trying this :
1) check the SCN on old primary
2) Rman incremantal backup from scn
3) on primary db : catalog
4) on primary db : recover database noredo
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