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

Similar Messages

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.

Configuring Non RAC physical standby fro RAC

Hi,
EBS-R12i , Oracle Database:11g
We are in project design phase and following is the hardware setup for Critical banking domain:
Database (2 node RAC)-Solaris 10
Application server server (2 server) -Solaris 10
Web server (2 server for Failover)= RHEL
For DR
Database (1 node)-Solaris 10
need to know
1.What are the best practice to implement this kind of setup and steps to configure DR as Non-RAC physical standby for RAC database server.
2.What are implication if we go for single node except failover node unavailability for DR.
3.What are the steps of Switchover in this case.
4.What's the recommended backup solution for this setup of 8-10 Terabyte database with db growth rate of 50% per year.

1.What are the best practice to implement this kind of setup and steps to configure DR as Non-RAC physical standby for RAC database server.There really aren't any differences in setting up your physical standby in a non-RAC configuration. It is after the physical standby is setup that it is converted to a clustered database, if desired. In your case, you do not desire the conversion.
The best place to start for best practices in setting up your physical standby is the Oracle documentation on the subject.
http://download.oracle.com/docs/cd/E11882_01/server.112/e17022/toc.htm
2.What are implication if we go for single node except failover node unavailability for DR.The major implications are that you will be running with less horsepower after a failover. So depending on your DR resources, you may have to scale back application access. In addition to less resources, you will also have less availability because you only have one node. Should that node then fail, you will not have a node to failover to.
3.What are the steps of Switchover in this case.The steps are identical if the physical standby is a single node or multiple nodes. These steps are outlined in the Oracle documentation.
4.What's the recommended backup solution for this setup of 8-10 Terabyte database with db growth rate of 50% per year.What are your recovery requirements? Without knowing your recovery requirements, a valid backup solution cannot be determined. How much data loss can you afford in the event of a failure? Do you have data that can be read only? In the event of a failure, how long before you are required to be up and running? Are you required to restore and recover at an offsite location?
Cheers,
Brian

RAC to RAC physical standby DB creation

Oracle version : 11.2.0.2
Platform : Solaris
I have created Physical Standby DBs of standalone DBs using RMAN's DUPLICATE command. Now , I need to create a Physical Standby
for a 2-node RAC primary DB. The standby will also be in a 2-node RAC.
In the standby site, Grid is succesfully installed , ASM instances are up and Diskgroup for the standby DB is ready. What are the extra changes that I need to make for RAC to RAC standby DB creation.
Currently, this is what I am planning to do
After
1. Establishing connectivity from standby to primary
and
2. Moving backup to standby
and
3. Starting the standby instance (not MOUNTing it)
From Node1 of standby server, I will run
primdb -- The tns entry to connect to Primary DB
$RMAN target sys/mypass@primdb auxiliary /
RMAN> duplicate target database for standby dorecover;

Cedar wrote:
Oracle version : 11.2.0.2
Platform : Solaris
I have created Physical Standby DBs of standalone DBs using RMAN's DUPLICATE command. Now , I need to create a Physical Standby
for a 2-node RAC primary DB. The standby will also be in a 2-node RAC.
In the standby site, Grid is succesfully installed , ASM instances are up and Diskgroup for the standby DB is ready. What are the extra changes that I need to make for RAC to RAC standby DB creation.
Currently, this is what I am planning to do
After
1. Establishing connectivity from standby to primary
and
2. Moving backup to standby
and
3. Starting the standby instance (not MOUNTing it)
From Node1 of standby server, I will run
primdb -- The tns entry to connect to Primary DB
$RMAN target sys/mypass@primdb auxiliary /
RMAN> duplicate target database for standby dorecover;
Whatever procedure you are looking, All provided by Mseberg
Addition to that,
As you are in 11g, You can perform duplicate from active database without backup. here you no need to copy those backups to standby server.
http://www.oracle.com/technetwork/database/features/availability/maa-wp-11g-rac-standby-133152.pdf
http://download.oracle.com/docs/cd/B28359_01/backup.111/b28270/rcmdupdb.htm#BRADV89929

OCM RAC Physical dataguard setup

Hi
I am preparing for the OCM examination and have gone through the detailed course outline but i am not clear on the following things.
OCM exam topic is very broad and the course outline does not cover topics in detail.
Suppose the examiner asks me to setup a RAC physical standby for RAC primary database this is going to take a lot of time and without my toolkit it is going to take a lot of time.
Currently the strategy i want to use for this kind of exam is have lot of things automated including shell tricks like aliasing example alias startup and the database gets started etc .But i guess these tools would not be allowed in the OCM exam.
I agree peeking into the documentation is allowed but in my humble opinion my college professor used to call these open book exam but many candidates who opened the book felt they never had time to compete the exam so i am kind of skeptical on this.
So do i use Oracle enterprise manage grid control to do things quickly ?
Practice on my home laptop with Enterprise Manger Grid Control (GC) ? to make things faster ?
If i need to install RAC and GC then probably i don't have a choice but if the question is to setup streams then probably GC is faster so confronted with a streams environment do i go ahead and use streams is that legal ?
Is that a good strategy ?
regards
P.S:Is it oaky to ask such a tactical question on this forum ?
Edited by: hrishy on Nov 4, 2009 3:10 AM

hrishy wrote:
My curiosity for OCM exam stems from the fact that setting up RAC physical standby with RAC primary would be a time consuming task and may not be feasible within the given time frame if i am ever asked to do so in the exam .You can be pretty confident that the exam will provide adequate time to do everything that is needed - if you are comfortable with the process, and the commands, based on experience.
If you need to read (study) the provided documentation at exam time to find out basic command syntax or to figure out the methods on the fly, then you will certainly run out of time. In other words, you should not ordinarily need to refer to the documentation by the time, other than to verify something that you may have confused due to pressure/stress.
Not sure what you are saying about pre-canned scripts. You can rest assured that you will not be allowed to
I was not going to comment about the specific scenario you mention. However, I do reiterate that they do not expect OCMs to be superhuman - just very competent and experienced. And I do question where you get the "Data Guard on a RAC DB" connection? (Data Guard, yes ... but tied to RAC?)

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 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

RAC and standby database

Hi,
We have configured a RAC production system and an standalone standby database.
Last week, we had trouble with our ESS subsystem and we have to failover.
Rigth now we solve the problem with the ESS subsysytem and the RAC enviroment is up and running but the database is no updated because is at the moment that we had the problem.
So, we want to back to the initial configuration (RAC primary database and standalone standby).
I want to know is this can be possible with only a backup/restore? (standby database cold backup and then restore the database over the RAC environment) and then reconfigure our standby database?
Or which steps should we follow to do this?
Thanks in advance,
Gerald

My question is:
Is it possible to setup a standby database on a RAC environment with 2 nodes? I've searched through MOS but didn't find any information about that...Yes, it is possible. Refer this
*Data Guard Physical Standby 11.2 RAC Primary to RAC Standby using a second network [ID 1349977.1]*
MAA / Data Guard 10g Setup Guide – Creating a RAC Physical Standby for a RAC Primary
http://www.oracle.com/technetwork/database/features/availability/maa-wp-10g-racprimaryracphysicalsta-131940.pdf
http://wiki.tapriuneclak.com/index.php?title=Oracle_-StepBy_Step_of_Configuring_Oracle_11gR2_(11.2.0.1)_RAC_to_RAC_Dataguard
http://davidalejomarcos.wordpress.com/2010/02/17/creating-a-3-node-rac-database-as-standby/

Rebuild RAC phsical standby with RMAN

Hi all,
Can anyone give any advice as to rebuilding an ACTIVATED RAC physical standby using RMAN? We have been able to revert the db with flashback but I need to know the rebuild method.
Is there any extra steps with the OCR?
I am guessing the steps might be:
1. Use DBCA to delete the newly activated standby.
(The DBCA will clean up the OCR components)
2. Use RMAN to duplicate a physical standby database.
3. Register the instances and services with the OCR.
Can any comment on this and suggest a decent task list from oracle as to the method.
Thanks in advance,
jd
Edited by: jonnyd on 30-May-2010 13:42

...anyone...?

RAC & DataGuard (Physical Standby)

Hello all,
I'm trying to get a high level overview of how RAC & DataGuard would behave in the following configuration. I've written down my understanding of how things would work. Please correct me if I'm wrong.
1) 2 node RAC (Primary Database) with a single instance physical standby.
a) Same standby related init.ora parameters would have to configured on both primary rac nodes.
b) The redo apply service at the standby would merge the redo from the 2 threads from the primary and apply it to the standby to keep it in sync.
c) During switch over only one primary RAC instance should be up besides the standby instance.
d) During switch back again only one primary RAC instance should be up besides the standby instance.
e) During failover ofcourse both primary instances would be down which warrants the fail over.
2) 2 node RAC (Primary) with a 2 node physical standby
This where it gets complex and I'm not really sure how a,b,c,d,e would be in this scenario. Appreciate if you could shed some light on this and list what
a,b,c,d,e would look like in this scenario.
I'm assuming that only one instance in the standby RAC should be up when the standby is in RAC configuration for the redo apply to work.
Also, if there is a white paper that details step by step procedure for setting up the above 2 scenarios, please let me know. So far I was able to find only the MAA white paper but that was not very helpful. If you can prescribe a good book for RAC & DataGuard that would be great too..
Thanks for your help

>
1) 2 node RAC (Primary Database) with a single instance physical standby.
a) Same standby related init.ora parameters would have to configured on both primary rac nodes.Usually rac nodes share their spfile on a shared diskvolume or through ASM. So they have identical DG parameter anyway
b) The redo apply service at the standby would merge the redo from the 2 threads from the primary and apply it to the standby to keep it in sync.Correct
c) During switch over only one primary RAC instance should be up besides the standby instance.
Sounds logical to me
Edit: In fact during normal operation both RAC nodes are up, so during switchover they are both active too
It is the configuration that matters. As soon as the standby is becoming primary, it might be that it talks only to one RAC node for its log-apply files
d) During switch back again only one primary RAC instance should be up besides the standby instance.That single was the only one running in step c.
e) During failover ofcourse both primary instances would be down which warrants the fail over.Correct. Keep in mind that during a failover the RAC config would be deconfigured from the DG setup and has to be added back again as standby.
You might have to take a look at: http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10g_RACPrimarySingleInstancePhysicalStandby.pdf
>
2) 2 node RAC (Primary) with a 2 node physical standby
This where it gets complex and I'm not really sure how a,b,c,d,e would be in this scenario. Appreciate if you could shed some light on this and list what
a,b,c,d,e would look like in this scenario.
I'm assuming that only one instance in the standby RAC should be up when the standby is in RAC configuration for the redo apply to work.
No. RAC primary to RAC Standby would mean both nodes are up on both side. PrimNode1 send its redo logs to StandbyNode1 and the same for PrimNode2 and StandbyNode2
Have a look here: http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10g_RACPrimaryRACPhysicalStandby.pdf
HTH,
FJFranken
My Blog: http://managingoracle.blogspot.com
Edited by: fjfranken on 16-jul-2010 1:13

Rolling Upgrade of Oracle 10gR2 RAC with Physical Standby (DG)

Hi DBAs,
I want to do a rolling upgrade of Oracle 10.2.0.3 (2 node RAC+ASM) with Physical Standy Dataguard to Oracle 10.2.0.4 also applying CPU (April2009).
Please suggest the best way to perform this upgrade and patching with no downtime.
Thanks
-Samar-

Unfortunately rolling upgrade is only possible with a logical standby in place:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/upgrades.htm#CHDBJAGG
That doesn't help you at this time, but 11g has a way to do it with a physical standby. Even here you need an intermediate logical standby:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/rollup.htm#CHDHCBGA
Werner

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

CREATING A SINGLE INSTANCE PHYSICAL STANDBY FOR A RAC PRIMARY

Hi
Creating a single instance physical standby database for a RAC Primary.
Getting this error.
sql statement: alter database mount standby database
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 01/17/2008 23:05:38
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of sql command on clone_default channel at 01/17/2008 23:05:38
RMAN-11003: failure during parse/execution of SQL statement: alter database mount standby database
ORA-01103: database name 'PROD' in control file is not 'DPROD'
Any help on this.
Regards
Satish

The problem here is probably with your standby init.ora file.
When you create a standby database, the db_name parameter must NOT change. It has to match the primary database. So in your case, db_name ='PROD' and your db_unique_name='DPROD'...
-peter

Physical standby database in RAC system

Hi EXperts,
We have a 4 nodes 11.2 cluster system. i will set a data guard as a disaster recovery mothods.
As a physical standby database set, does we need to configure same nodes (4 nodes) in other city as primary database cluster system?
Can we set physical standby database is in 2 nodes cluster system and primary database is in 4 nodes cluster system?
Thanks explaining!
Jin

Can we set physical standby database is in 2 nodes cluster system and primary database is in 4 nodes cluster system?Yes. You can setup 2 node RAC as physical standby and also with different memory parameters. But, the only issue is when DB failover from primary to standby, the applications connect to 2 node RAC in place of 4 node RAC and may be overloaded.

Dataguard physical standby archive log question

Hi all,
I will try to keep this simple..
I have a 4 node RAC primary shipping logs to a 2 node physical standby.
On the primary when I run 'alter system archive log current' on an instance I only see 1 log being applied on the standby, that is by querying v$archived_log.
If I run the following on the standby:
select thread#,sequence#,substr(name,43,70)"NAME",registrar,applied,status,first_time from v$archived_log where first_time
in
(select max(first_time) from v$archived_log group by thread#)
order by thread#
I get:
THREAD# SEQUENCE# NAME REGISTR APPLIED S FIRST_TIME
1 602 thread_1_seq_602.2603.721918617 RFS YES A 17-jun-2010 12:56:58
2 314 thread_2_seq_314.2609.721918627 RFS NO A 17-jun-2010 12:56:59
3 311 thread_3_seq_311.2604.721918621 RFS NO A 17-jun-2010 12:57:00
4 319 thread_4_seq_319.2606.721918625 RFS NO A 17-jun-2010 12:57:00
Why do we only see the max(sequence#) having been applied and not all of them?
This is the same no matter how many times I archive the current log files on any of the instances on the primary and also the standby does not have any gaps.
Hope this is clear..
any ideas?
jd

ok output from gv$archived_log on standby BEFORE 'alter system archive log current' on primary
THREAD# SEQUENCE# NAME REGISTR APPLIED S FIRST_TIME
1 679 thread_1_seq_679.1267.722001505 RFS NO A 18-jun-2010 11:58:22
1 679 thread_1_seq_679.1267.722001505 RFS NO A 18-jun-2010 11:58:22
2 390 thread_2_seq_390.1314.722001507 RFS NO A 18-jun-2010 11:58:23
2 390 thread_2_seq_390.1314.722001507 RFS NO A 18-jun-2010 11:58:23
3 386 thread_3_seq_386.1266.722001505 RFS YES A 18-jun-2010 11:58:22
3 386 thread_3_seq_386.1266.722001505 RFS YES A 18-jun-2010 11:58:22
4 393 thread_4_seq_393.1269.722001507 RFS NO A 18-jun-2010 11:58:23
4 393 thread_4_seq_393.1269.722001507 RFS NO A 18-jun-2010 11:58:23
Output from v$archived_log on standby AFTER 'alter system archive log current' on primary
THREAD# SEQUENCE# NAME REGISTR APPLIED S FIRST_TIME
1 680 thread_1_seq_680.1333.722004227 RFS NO A 18-jun-2010 11:58:29
1 680 thread_1_seq_680.1333.722004227 RFS NO A 18-jun-2010 11:58:29
2 391 thread_2_seq_391.1332.722004227 RFS NO A 18-jun-2010 11:58:30
2 391 thread_2_seq_391.1332.722004227 RFS NO A 18-jun-2010 11:58:30
3 387 thread_3_seq_387.1271.722004225 RFS NO A 18-jun-2010 11:58:28
3 387 thread_3_seq_387.1271.722004225 RFS NO A 18-jun-2010 11:58:28
4 394 thread_4_seq_394.1270.722004225 RFS YES A 18-jun-2010 11:58:29
4 394 thread_4_seq_394.1270.722004225 RFS YES A 18-jun-2010 11:58:29
as a reminder we have a 4 node RAC system shipping logs to a 2 node RAC standby. There are no gaps but only one log is ever registered as being applied.
Why is that? Why arnt all logs registered as being applied?

RAC physical standby in dataguard

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