Physical standby without dataguard

Naive question.
I am going thru metalink note (374069.1) on how to create a physical standby. In that note, they didn't mention data guard stuff. Am I to assume that physical standby without dataguard can be created?
Thanks.

It might appears to be easy to create psuedo standy but you will have hardtime to simulate the automatic archive log apply and gap resolve.
Plus the level of data availability provided by self-managed standby can't come close to Data Guard can offer.
With Data Guard you can almost get zero data loss between Primary and Standy, depends on your redo logfile size there could be many data in online redo logs.

Similar Messages

Standby without DataGuard

Hi,
I've successfully created a standby for a single node Primary Database in 10g on Redhat Enterprise Linux 4.0 Update 4.0. I'm planning to add one more standby site to the same primary database. Now, my question is...
1. Is it possible to setup more than one standby without the help of DataGuard.
2. If possible, please guide me how to do it(step-by-step).
Thanks in advance...
Mahesh

If you've already configured one Standby without DataGuard, you'd use the same method for the second standby.
Since we do not know your scripts and how you are propagating archive logs and putting the standby in recovery mode -- all of which would be "custom" methods in the absence of DataGuard -- we can't really advice you . Because it is difficult to advice on extensions to a customisation without looking at a customisation.
Many sites have implemented a scripted Standby without DataGuard using methods available since Oracle7. However, the frequency and method of archivelog propagation and how and when the standby database "wakes up" to apply the archivelogs etc are all site specific.
Let's say that you DO use the ARCH process on the primary database to propagate archivelogs to the Standby destination site. Since Oracle 10g allows multiple log_archive_dest_n sites, you can just add one more site and have the archivelogs propagate to the additonal site. However, there are other parameters (eg MANDATORY/OPTIONAL, REOPEN, DELAY etc) that you would set based on your requirements.
The two standby instances would be independent {unaware} of each other -- you can script delays between the archivelogs so that the two standby aren't always at the same level (this allows "fallback" to an "older version of the database" when necessary). You could have one standby stop recovery and open read only for some time.
Short Answer : Yes, it is possible to have multiple "standby"s without DataGuard.
Correct Answer : How you do it depends on how you want to extend your current implementation.
Hemant K Chitale
http://hemantoracledba.blogspot.com

9i Standby without dataguard

Hi all.
Oracle 9i ( SE )
I'm trying to figure out how to create a standby database without dataguard. I've read that its possible, but I can't find any documentation on exactly how to do it. From what I've gathered I should be able to
Create a duplicate database from primary backups
Put standby database into "some recovery mode" - this is the bit I'm stumped at
Copy archive logs from primary to standby, where they will magically be applied?
I need to migration lots of datafiles to new disks, and cannot afford the downtime to just move them, so I'm thinking the best way to do it is to create a standby and keep it as close to synced to the primary as possible, then shutdown primary, apply file logs, point primary to the new datafile location..
Can anyone either point me to a good article on doing standby with dataguard, or if there is a better way to move large ( move procedure will take about 4-5 hours) tablespaces/databases with minimum downtime.
Thanks.

Hrmm, maybe? so is "Data Guard" by itself available for SE?
When I startup the database it reports
"Oracle Data Guard is not available in this edition of Oracle."
I'll go poke around that document too.
btw. the document I read which suggests this is possible is, http://www.dba-oracle.com/oracle_tips_failover.htm
Thanks
Message was edited by:
nib000

Physical standby without ALTER DATABASE FORCE LOGGING

Hi,
Is it possible to use physical standby database without executing ALTER DATABASE FORCE LOGGING on primary side?
Can I use alter tablespace force logginng instead?
I want to have one tablespace with nologging option turned on to reduce redo traffic for some operations.
I can not check this because I don`t have enough servers to build standby configuration.

YuriAP wrote:
Hi,
Is it possible to use physical standby database without executing ALTER DATABASE FORCE LOGGING on primary side?
YES
Can I use alter tablespace force logginng instead?
YES
ALTER TABLESPACE <tablespace name> FORCE LOGGING;
I want to have one tablespace with nologging option turned on to reduce redo traffic for some operations.
I can not check this because I don`t have enough servers to build standby configuration.http://download.oracle.com/docs/cd/B10500_01/server.920/a96521/create.htm#1022863

RAC physical standby in dataguard

Hi All
How many nodes need to be on the mount state in the RAC physical standby ? for example if we have RAC of 4 nodes in the physical standby . do I startup all of them in mount state or only one and what about the other they should be open or we shut them down ?
Thanks

Hi,
-- assuming version 10.2
If your primary database is a rac all the instances will send the redo information but even if the standby database is also a rac only one will receive/apply the redo information.
How many nodes need to be on the mount state in the RAC physical standby ? for example if we have RAC of 4 nodes in the physical standby . do I startup all of them in mount state or only one and what about the other they should be open or we shut them down ?
The instances will be mounted, if the working instance fails another one will be able to do the job.
Best regards
Phil
Edited by: Philippe Florent on Sep 15, 2010 12:05 AM -- completing the answer

Standby Redolog Creation for Physical standby

I want to migrate my primary database from one server X to standby database which i want to create on other server Y. once Primary and standby will get SYNC , i will do Fail over to make standby as primary and divert current application on standby considering as full functional Primary.
Is it mandatory to create SRL ( Standby redo log)? or I can create physical standby without SRL? If Yes, on which side (primary or standby) i need to create SRL?
Appreciate your help..

Hello,
Now, My standby database has configured. Since i had restore and recover standby database from standby controlfile instead of RMAN Duplicate. I had done following step:
ON standby side:
$rman target /
RMAN> restore standby controlfile from '/app/oracle/standbyctl.ctl'
RMAN> sql 'alter database mount standby database';
RMAN> restore database;
RMAN> list backup of archive log all;
RMAN> RMAN> recover database until sequence 1670;
SQL> alter database recover managed standby database disconnect from session;
• On Primary:
SQL> alter system set log_archive_dest_state_2=ENABLE;
• On Standby:
SQL> select sequence#,applied from v$archived_log order by sequence#;
I am at this stage now. My primary and standby database in synchronization. As per my first thread above, we will have planned outage to move application to standby database and make it full functional primary database. once application will move on new server( standby database). we will not use current primary database anymore.
what are the procedure i need to do on primary side and standby side when migrate application on new server.? rightnow my standby database in MOUNT mode and archive log is shipping from primary to standby. we have no dataguard broker configuration. i need to do it manually using SQL command.

Logical or physical standby

Hi,
on 10g R2
any way to know if we are in logical or physical standby for DATAGUARD ?
Thank you.

ok, thank you.
But connected to a instance , I receive the following :
SQL> select instance_role from v$instance;
INSTANCE_ROLE
PRIMARY_INSTANCE
SQL> select database_role from v$database;
DATABASE_ROLE
PHYSICAL STANDBYAm'I connected to PRIMARY or to STANDBY ?
In documentation :
INSTANCE_ROLE VARCHAR2(18) Describes whether the instance is an active instance (PRIMARY_INSTANCE) or an inactive secondary instance (SECONDARY_INSTANCE), or UNKNOWN if the instance has been started but not mounted

ORA-326/ORA-334 Physical Standby DB - Not applying logs

Hi, all, I have a Dataguard, the primary db is a RAC with three nodes, the standby db is a physical standby. the dataguard are all oracle 10.2.0.3 on solaris 9 sparc system
Now, my standby db did not apply the archivelogs,there are some errors in standby alert log :
Thu Jan 8 15:44:31 2009
Errors in file /oracle/admin/xxxx/bdump/whut_mrp0_12863.trc:
ORA-00326:log begins at change 2984028173, need earlier change 2984013192
ORA-00334:archived log '+DGARCH/whut/3_22648_611942629.dbf'
Managed Standby Recovery not using Real Time Apply
Recovery interrupted!
Thu Jan 8 15:44:34 2009
Errors in file /export/home/oracle/admin/whut/bdump/whut_mrp0_12863.trc:
ORA-00326:log begins at change 2984028173, need earlier change 2984013192
ORA-00334:archived log '+DGARCH/whut/3_22648_611942629.dbf'
Thu Jan 8 15:44:34 2009
MRP0: Background Media Recovery process shutdown (whut)
and the archivelogs on the standby db like this :
NAME APP DEL
+DGARCH/whut/3_22651_611942629.dbf                           NO NO
+DGARCH/whut/3_22650_611942629.dbf                           NO NO
+DGARCH/whut/3_22649_611942629.dbf                           NO NO
+DGARCH/whut/3_22648_611942629.dbf                           NO NO
+DGARCH/whut/3_22648_611942629.dbf                           NO NO
+DGARCH/whut/3_22648_611942629.dbf                           NO YES
+DGARCH/whut/3_22291_611942629.dbf                           YES YES
+DGARCH/whut/2_62553_611942629.dbf                           NO NO
+DGARCH/whut/2_62552_611942629.dbf                           NO NO
+DGARCH/whut/2_62551_611942629.dbf                           NO NO
+DGARCH/whut/2_62550_611942629.dbf                           NO NO
query the first_change# on the standby db like this :
SEQUENCE# FIRST_CHANGE# APP ARC
22646 2983721221 NO YES
22647 2983911304 NO YES
22648 2984028173 NO YES
23813 2984013365 NO YES
23814 2984118027 NO YES
62546 2984027708 NO YES
SEQUENCE# FIRST_CHANGE# APP ARC
62547 2984163823 NO YES
23815 2984132128 NO YES
23816 2984312713 NO YES
62548 2984255538 NO YES
62549 2984312692 NO YES
22649 2984028196 NO YES
23817 2984351070 NO YES
then ,how to fix the dataguard and apply the archivelog on standby db ?
why I can found 2984028173 with 22648,but can not found 2984013192 ??
and why there have three 22648 with different applied status and deleted status on standby db ???
Thanks all.

Thank you for your reply.
the trc file like this:
/oracle/admin/xxx/bdump/xxx_mrp0_12863.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
ORACLE_HOME = /oracle/product/10.2.0/database
System name:     SunOS
Node name:     stdb
Release:     5.9
Version:     Generic_122300-25
Machine:     sun4u
Instance name: xxx
Redo thread mounted by this instance: 1
Oracle process number: 27
Unix process pid: 12863, image: oracle@stdb (MRP0)
*** SERVICE NAME:() 2009-01-08 15:44:24.179
*** SESSION ID:(197.3) 2009-01-08 15:44:24.179
ARCH: Connecting to console port...
*** 2009-01-08 15:44:24.180 61287 kcrr.c
MRP0: Background Managed Standby Recovery process started
*** 2009-01-08 15:44:29.191 1103 krsm.c
Managed Recovery: Initialization posted.
*** 2009-01-08 15:44:29.192 61287 kcrr.c
Managed Standby Recovery starting Real Time Apply
Recovery target incarnation = 5, activation ID = 721050634
Influx buffer limit = 152383 (50% x 304766)
Successfully allocated 3 recovery slaves
Using 367 overflow buffers per recovery slave
Start recovery at thread 3 ckpt scn 2984013192 logseq 22648 block 2
*** 2009-01-08 15:44:31.181
Media Recovery add redo thread 3
*** 2009-01-08 15:44:31.181
Media Recovery add redo thread 1
*** 2009-01-08 15:44:31.182
Media Recovery add redo thread 2
*** 2009-01-08 15:44:31.184 1103 krsm.c
Managed Recovery: Active posted.
*** 2009-01-08 15:44:31.838
Media Recovery Log +DGARCH/whut/3_22648_611942629.dbf
*** 2009-01-08 15:44:31.851 61287 kcrr.c
MRP0: Background Media Recovery terminated with error 326
ORA-00326: log begin at 2984028173, need earlier 2984013192
ORA-00334: archivelog: '+DGARCH/whut/3_22648_611942629.dbf'
*** 2009-01-08 15:44:31.851 61287 kcrr.c
Managed Standby Recovery not using Real Time Apply
*** 2009-01-08 15:44:31.851
Media Recovery drop redo thread 3
*** 2009-01-08 15:44:31.851
Media Recovery drop redo thread 1
*** 2009-01-08 15:44:31.851
Media Recovery drop redo thread 2
*** 2009-01-08 15:44:34.269 1103 krsm.c
Managed Recovery: Not Active posted.
ORA-00326: log begin at 2984028173,need earlier 2984013192
ORA-00334: archivelog: '+DGARCH/whut/3_22648_611942629.dbf'
ARCH: Connecting to console port...
*** 2009-01-08 15:44:34.359 61287 kcrr.c
MRP0: Background Media Recovery process shutdown
*** 2009-01-08 15:44:34.359 1103 krsm.c

Logical Standby to Physical Standby

Hi Group,
Please clarify. Is it possible to return from a Logical Standby to Physical standby without copying the datafiles from Primary enviroment again?.
If yes, how?
Thanks a lot.
Oracle 10.2.0.4
SO: AIX 6.1
We also have all archives generated by primary database on disks

user12215372 wrote:
Hi Group,
Please clarify. Is it possible to return from a Logical Standby to Physical standby without copying the datafiles from Primary enviroment again?.
If yes, how?
Thanks a lot.
Oracle 10.2.0.4
SO: AIX 6.1
We also have all archives generated by primary database on disksAFAIK, it is not possible, you have to create a fresh physical standby database.

Question - Oracle Physical Standby

Oracle 10.2.0.3 database running on row logical disk (row device) with two thread RAC cluster with CRS and AIX-HACMP implemented on two nodes running AIX6.1 OS
My question can one create simple Oracle Physical Standby (without data guard etc) Database on different AIX node which do not have HACM and CRS RAC but simple non RAC Oracle S/W installed
If this can be done how the single one thread non RAC Oracle database will consume and apply two thread archive logs and keep itself to sync with primary database changes.
Can you please provide some details if this is feasible or not? My guess is for this to happend ORACLE RAC setup with RAC enable Oracle S/W is must with one active thread and other thread can be inactive and not in use.
Thanks –

A standby database is not Data Guard ... it is a standby. Data Guard is a specific automated implementation of a Standby. You can do whatever you wish manually if you prefer pain to comfort.
Personally I'd throw away the IBM stuff and go with Data Guard: It is far superior and does something critical HACM can not do ... guarantee that what is replicated is logically correct. Replicating corruption has no value.

How to create physical standby database without dataguard

Hi,
Can anyone please help me how to create Physical Standby Database without dataguard. As i am using Oracle 10.2.0.1 Standard Edition for production databases.
Please find the specifications of my server :
Database : Oracle 10.2.0.1(Standard Edition)
Server : Linux 4.0(32 bit machine)
As we know that Dataguard cannot be created in Standard Edition as we dont have that option in this edition. So please help me how to create the physical standby database.
Thanks in advance.
Regards,
Farooq

Hello,
I hope this link helps you out...
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/rcmbackp.htm
http://www.dbasupport.com/oracle/ora10g/manual_standby.shtml
Thanks & Regards
Pratik Lakhpatwala
Jr Oracle DBA
Edited by: Pratik.L on Dec 31, 2009 12:03 PM

Can I rename a physical Standby database without having to recreate?

Hi all,
One of my DBA's created a new standby database yesterday. He was supposed to create the standby database with a unique name from the primary system, but he didn't. So right now, DataGuard is running and replicating, and the standby has the exact same database name as primary.
I'd like to get this configured the way we had planned, to rename the standby database to something unique. I see Metalink Doc ID 15390.1, showing how to rename a database, but I'm not sure if this is possible in the standby environment? Has anyone ever done this? Anything different that needs to be accounted for, in the physical standby DB?
I'm on 10.2.0.3, on Windows 2003.
Any help/advice is appreciated!!
Thanks,
Brad

Dear TheBlakester,
You have to write it on the spfile and bounce the database. You should also have to change the log_archive_config parameter with the new standby db_unique_name.
From the online Oracle documentation;
For example, if the DB_UNIQUE_NAME parameter has not been defined on either database, the following SQL statements might be used to assign a unique name to each database.
Execute this SQL statement on the primary database:
SQL> ALTER SYSTEM SET DB_UNIQUE_NAME='CHICAGO' SCOPE=SPFILE;
Execute this SQL statement on the standby database:
SQL> ALTER SYSTEM SET DB_UNIQUE_NAME='BOSTON' SCOPE=SPFILE;
Step 4 Verify that the LOG_ARCHIVE_CONFIG database initialization parameter has been defined on the primary and standby database and that its value includes a DG_CONFIG list that includes the DB_UNIQUE_NAME of the primary and standby database.
For example, if the LOG_ARCHIVE_CONFIG parameter has not been defined on either database, the following SQL statement could be executed on each database to configure the LOG_ARCHIVE_CONFIG parameter:
SQL> ALTER SYSTEM SET
2> LOG_ARCHIVE_CONFIG='DG_CONFIG=(CHICAGO,BOSTON)';After than that it is better for you to check following items just in case;
v$archived_log
v$dataguard_status
Data Guard log file & Alert.log file.Hope That Helps.
Ogan

Test physical standby database in dataguard

Hi all,
I had a successfull dataguard implementation for oracle 9r2.
Primary and standby databases are on different nodes, logs from primay are shipping and applying to physical standby database successfully.
As these database are for oracle 11i ebs, so for testing dataguard status i had created a table manually having columns date and remarks. Periodically i insert few records in this table in primary database and then chek this tabel in standby database (by opening in read only mode).
Now i want to test physical standby database with applications tier but don't want to disturb origional primary database.
as these are the normal switchover steps
1) at primary db
ALTER DATABASE COMMIT TO SWITCHOVER TO PHYSICAL STANDBY WITH SESSION SHUTDOWN;
2) at standby
ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY;
3) at primary, now this will be the stand by database
SHUTDOWN IMMEDIATE;
STARTUP MOUNT;
4) at standby, now this will be the primary database
SHUTDOWN IMMEDIATE;
STARTUP
My concern is if i skip step 1 and 3 and only execute step 2 and 4, will that be applicable for my requirement, or there is some other way to achieve this goal.
Regards,
Ken

To avoid touching the primary production DB, you may try to use the following command on your standby database side:
alter database activate standby database;
This will turn your standby database to primary database, however the log will be reset and this means you will need to rebuild your DR.
Another way is to use flash back feature on your standby database, activate it and revert back to the flashback point when the DR testing is done.

Bringing a Physical Standby database online without (a) tablespace(s)

Dear all,
Is it possible to create a kind of "dblink" in a physical standby database residing in a remote host (another host than the primary production database)? We want to make this standby DB to be online without one tablespace.
Our database consists of 2 parts: a core part (around 55 Gb) - stored in 2 tablespaces, residing in one mounted disk - and an "attachment" part (around 550 Gb) - stored in one tablespace, residing in 2 mounted disks. The attachment part is of less importance. We would like to make a standby DB for the core part and exclude the attachment part (because of its extensive size) to be online.
Currently we can not put this physical standby DB online, since it requires the attachment datafiles to be available.
Would it be a problem if we NFS mount these 2 disks on the host where the standby database resides?
The best solution would be if we can tell the standby DB that there is no need to update the attachment tablespace.
Thanx a lot for anyone reading, thinking and most of all give the solution for my problem...
Agape
Thanx in advance.

Hi Sybrand,
Since we only will use the standby DB in read only mode, maybe the use of a Logical one will be usefull afterall.
Can you please explain how to configure this need (having a standby DB without this one large TB) in a Logical standby DB?
Your help will be highly appreciated.
Thanx
Solution found: Bringing physical standby database to online

Oracle 10g Dataguard Physical Standby Database

When I set my dataguard group to "MAXIMIZE AVAILABILITY" the protection level is always RESYNCHRONIZATION.
It's normal ?
SQL> SELECT PROTECTION_MODE, PROTECTION_LEVEL, DATABASE_ROLE FROM V$DATABASE;
PROTECTION_MODE PROTECTION_LEVEL DATABASE_ROLE
MAXIMUM AVAILABILITY RESYNCHRONIZATION PHYSICAL STANDBY
SQL> show parameter log_archive_dest_2
NAME TYPE VALUE
log_archive_dest_2 string SERVICE=PIJ10G2 LGWR SYNC AFFIRM
SQL> show parameter log_archive_dest_state_2;
NAME TYPE VALUE
log_archive_dest_state_2 string ENABLE

this is my log on primary db :
Thread 1 advanced to log sequence 422
Current log# 1 seq# 422 mem# 0: /oradata/orapij10g/redologs/PIJ10G/redo01.log
Wed Oct 1Thread 1 cannot allocate new log, sequence 423
Private strand flush not complete
Current log# 1 seq# 422 mem# 0: /oradata/orapij10g/redologs/PIJ10G/redo01.log
Wed Oct 17 16:24:51 2007
Destination LOG_ARCHIVE_DEST_3 is SYNCHRONIZED
LNSc started with pid=34, OS id=21052
Wed Oct 17 16:24:56 2007
Destination LOG_ARCHIVE_DEST_3 is UNSYNCHRONIZED
Wed Oct 17 16:24:56 2007
Errors in file /oracle/ora10g/admin/PIJ10G/bdump/pij10g_lgwr_26248.trc:
ORA-16086: Message 16086 not found; No message file for product=RDBMS, facility=ORA
LGWR: Failed to archive log 2 thread 1 sequence 423 (16086)
Thread 1 advanced to log sequence 423
Current log# 2 seq# 423 mem# 0: /oradata/orapij10g/redologs/PIJ10G/redo02.log
I don't understand this error message. How can solve my probleme ?

Physical standby without dataguard

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