Local logical standby and remote physical standby

Dear All,
My database version is 10.2.0.1.0(production) and Operating System Linux x86-64 OS Version Red Hat Enterprise 4
Below is my configuration details:
Rprimary Database:Two Nodes RAC
StandBy Database LOCAL:Standalone database
Standby Database Remote:Two Node RAC
So,my question is, i want my local physical DR to convert into logical standby and
Remote DR will operate as physical standby as it IS.
sql>EXECUTE DBMS_LOGSTDBY.BUILD
After executing the above statement in my production primary database will there be any performance HIT.
And another important is that my above statement shouldn't affect my remote physical DR database.
Just the local DR should get converted into logical standby database
Thanks and Regards
Monoj Das

monoj wrote:
Dear All,
My database version is 10.2.0.1.0(production) and Operating System Linux x86-64 OS Version Red Hat Enterprise 4
Below is my configuration details:
Rprimary Database:Two Nodes RAC
StandBy Database LOCAL:Standalone database
Standby Database Remote:Two Node RAC
So,my question is, i want my local physical DR to convert into logical standby and
Remote DR will operate as physical standby as it IS.
sql>EXECUTE DBMS_LOGSTDBY.BUILD
After executing the above statement in my production primary database will there be any performance HIT.
And another important is that my above statement shouldn't affect my remote physical DR database.
Just the local DR should get converted into logical standby database
Thanks and Regards
Monoj DasIn any Data Guard environment, you can have either physical or logical or even mixed[physical + logical]
There will be no performance issue if you run the package for logical standby DBMS_LOGSTDBY.BUILD , This package provides you to manage even logical standby database.

Similar Messages

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

Can i convert logical standby database to physical standby database

Dear All,
Can i convert a logical standby database to physical standby database?
If yes, what are the steps to follow?
Thanks
Mahipal

I never needed or tested something like this, but below maybe usefull -
Transient Logical Standby
Users can convert a physical standby to a transient logical standby database to effect a rolling database upgrade, and then revert the standby to its original state as a physical standby database once the upgrade is complete - using the KEEP IDENTITY clause. This benefits physical standby users who wish to execute a rolling database upgrade without investing in redundant storage otherwise needed to create a logical standby database.
http://www.oracle.com/technology/deploy/availability/htdocs/DataGuardOverview.html
But opposite is documented - http://download-west.oracle.com/docs/cd/B19306_01/server.102/b14239/create_ls.htm#BEIGJCAC
best regards.

Cascading physical standby from another physical standby for primary rac

my supplier told me that is possible mount a cascade physical standby from a physical standby for my rac installation.
but according the note "409013.1" seems not:
"Cascading a logical or physical standby database from a physical standby database is supported as long as the primary database is not a RAC database and is not part of a Data Guard Broker configuration - the support status of this configuration is unchanged from previous documentation."
before was possible? do you know why not now?
has anyone mounted? can I allow my provider to mount?
oracle version: 10.2.0.2.0

Is it possible this scenario?YES

Difference Between Logical Screen and Active/Physical Screen

Hi All,
Could someone tell me what is the Diffrence Between Logical Screen and Active/Physical Screen and what is the reason for having two screens instead of one.
Thanks in Advance,
Joseph Reddy.

Hi Marilyn,
Thanks You. I have found the answer to this.
All,
If you go to the SPRO>Logistics Execution>Mobile Data Entry-->Define Screen Management. Here you have two screens one is Logical Screen and another actual Screen and a program associated to this.
Here the Logical Screens are used within the program and Actual screens are the screens which are visible to the User. The Link between Logical and actual screen is present in the table T3130C. Program recognises logical screens.
Now suppose say certain functionality/create new transaction code for RF Device is not there in SAP and you want to Include/Create your own code in any of the User-Exits. Then you have to rename the actual screen to 9***. So that the system recognises the change in the screen and related User-Exit is executed.
Hope this is Clear.
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How to convert logical standby database to Physical Standby Database

Hi,
Does anyone know how to convert logical standby database(10.2.0.3) to Physical Standby Database(10.2.0.3)? Is this possible? If so,please give me steps for it.
Thanks.
Regards,
RJ.

I don't believe this to be possible. One of the steps invloved in the creation of a logical standby is the following:
ALTER DATABASE OPEN RESETLOGS;
This makes the logical standby a different incarnation of the db from the primary.
A physical standby is a binary copy of a primary db, a logical standby is a completely seperate db that just happens to get sql statements applied to it that are generated from a primary db, but is open read/write.
One avenue, though would be if you had flashback database enabled and you flashed back all the way to when the db was a physical standby and then rolled forward with the archived redo logs.
It's somewhat unlikely you are in that situation, but that is a possibility.
Indeed the 11g snapshot standby does this sort of thing:
http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/manage_ps.htm#sthref740
jason.
http://jarneil.wordpress.com

Create logical standby from existing physical standby on 9i

I have physical standby database 9i running.
I want to try to convert the physical standby to logical standby. i follow the step by step in metalink document no. 748595.1
But I cannot do the 6th step:
6. Issue command to switch physical standby to logical standby after changing db_name in pfile to logical standby name. Shutdown the standby database if mounted and mount the database again. In this configuration, logical standby database name is LGSTDBY.
sql>alter database recover to logical standby LGSTDBY;
alter database recover to logical standby LGSTDBY;
Error at line 1:
ORA-00905: missing keyword
I have tried to create pfile from spfile on stanby and change the db_name to lgstdby.
I started nomount using pfile. I still cannot run the command.
I tried to mount the standby database but error occured:
ORA-01103: database name 'PRIMARY' in controlfile is not 'LGSTDBY'
The document in metalink is for 10.2.0.4
Is it possible to do it at 9i??
Thx for the help...

FEDORA 6 & ORACLE 10.2.0
alert_stb.log:
alter database start logical standby apply
Wed Jun 17 22:46:58 2009
ALTER DATABASE START LOGICAL STANDBY APPLY (stb)
Wed Jun 17 22:46:58 2009
No optional part
Attempt to start background Logical Standby process
LSP0 started with pid=22, OS id=4156
Wed Jun 17 22:46:59 2009
Completed: alter database start logical standby apply
Wed Jun 17 22:47:01 2009
LOGSTDBY status: ORA-16111: log mining and apply setting up
Wed Jun 17 22:47:01 2009
LOGMINER: Parameters summary for session# = 1
LOGMINER: Number of processes = 3, Transaction Chunk Size = 201
LOGMINER: Memory Size = 30M, Checkpoint interval = 150M
LOGMINER: session# = 1, reader process P000 started with pid=23 OS id=4158
LOGMINER: session# = 1, builder process P001 started with pid=24 OS id=4160
LOGMINER: session# = 1, preparer process P002 started with pid=25 OS id=4162
Wed Jun 17 22:47:02 2009
LOGMINER: Begin mining logfile: /u01/app/oracle/flash_recovery_area/STB/archivelog_3/1_3_689731882.arc
Wed Jun 17 22:47:02 2009
LOGMINER: Turning ON Log Auto Delete
Wed Jun 17 22:47:02 2009
LOGMINER: End mining logfile: /u01/app/oracle/flash_recovery_area/STB/archivelog_3/1_3_689731882.arc
LOGSTDBY Analyzer process P003 started with pid=26 OS id=4164
LOGSTDBY Apply process P008 started with pid=31 OS id=4174
LOGSTDBY Apply process P007 started with pid=30 OS id=4172
LOGSTDBY Apply process P004 started with pid=27 OS id=4166
LOGSTDBY Apply process P006 started with pid=29 OS id=4170
LOGSTDBY Apply process P005 started with pid=28 OS id=4168

Can you convert a Logical standby to a Physical Standby?

Is it possible to convert a Logical Standby database back to a Physical Standby database? The reason I am asking is that I would like to convert my Physical Standby database to a Logical Standby database, do a rolling upgrade from 10.2.0.1 to 10.2.0.2 then convert the standby back to a Physical. Does anyone know if this is possible?

I would consider logging a TAR with Oracle support for suggestions.
Here's mine:
Install 10.2.0.2 into new, separate Oracle homes(10.2.0.1 & 10.2.0.2 patch & CPU2006Apr & 4516865 patch) on Prime and SB Nodes.
Create a New 10.2.0.2 database.
Then transport the tablespaces from Old Primary to New Primary.(short downtime)
Drop current DR Configuration.
Stop and Drop the 10.2.0.1 databases, then rename the 10.2.0.2 to same SID as old one (short downtime) .
Search for and follow the "create standby with minimal downtime" document from metalink.(use "minimal" as search string).
Your Total downtime should now only be a few minutes.
Test the whole idea first though, using 'toy' sized databases. (All care, no responsibility etc)
regards, Vin.

One primary and two Physical standby

Hi everyone,
I want configure two separate Physical standby one work in Redo apply and one in log apply mode.
is it posible?

user011232 wrote:
Hi everyone,
I want configure two separate Physical standby one work in Redo apply and one in log apply mode.
is it posible?Yes it can possible very much. You have to configure as below in remote destinations.
Example_:-
Log_archive_dest_2='service= stby1 lgwr async ';
Log_archive_dest_3='service= stby2 arch async ';
What is the plan behind that? just for testing purpose? Even me too not tested but you can try configuring as above. :)
Edited by: CKPT on Feb 14, 2012 5:46 PM

How to stop and cancel physical standby database (ORACLE 10g)

Dear All,
I have physical standby setup and I want stopped for the time being that to use the database as an normal DB (standalone inestance).
Kindly advise and show me how do I do that.
Regards,

executing below query on primary db stops log shipping to standby.......i think this is sufficient for disabling your physical standby setup temporary
alter system set log_archive_dest_state_2=defer scope=both;
In future if you want your dataguard setup back..............you can rebuild the standby and enable the log_archive_dest_state_2 parameter.
Edited by: Veeresh.S on Nov 14, 2012 5:45 PM

Major release with two logical stbys and two physical stbys

I have a 300G 11g database in production with two physical standby and 2 logical standby databases. We are planning for a major release which include heavy data load and ddls. What would be the best way to salvage my standbys while running the release scripts.
I am afraid that we have 70/30 chance of successfully releasing the release, which means that I have 30% possibility to "restart" the release process from the point 0. Someone in my shop suggested using flashback, but I don't know if my server have that much of space to assign to the flashback recovery area. The upgrade/release takes approximately two days to run.
I was thinking of stopping the log transfer to all the standby database locations while running the load and once I am done, then transfer all the logs and re-enable the standby to "catch up", but would it work for logical standby, too?
I could not just disable all the standbys and re-create them once the release is completed because two of the standby databases are located at off-site with the limited network speed, and re-creating standby through network takes too long for us to do so.
Any thoughts would be appreciated.
Thanks,

I have a 300G 11g database in production with two physical standby and 2 logical standby databases. We are planning for a major release which include heavy data load and ddls. What would be the best way to salvage my standbys while running the release scripts. What would be the approximate size of data size it is going to load?
If its very huge then see the disadvantages:
1) Log of redo
2) in equal size of Archive logs
3) FRA/arch space issues at OS Level
4) Network traffic to 4 sites(2 physical + 2 logical)
5) Lot of archives on Standby databases too
6) How fast standby can fetch & apply?
I am afraid that we have 70/30 chance of successfully releasing the release, which means that I have 30% possibility to "restart" the release process from the point 0. Someone in my shop suggested using flashback, but I don't know if my server have that much of space to assign to the flashback recovery area. The upgrade/release takes approximately two days to run.Its production, When you flashback database it will open database in resetlogs then your complete DR setup is in trouble.
is it flashback or restorepoint with flashback?
Restore Points in Oracle10g Release2 [ID 330535.1] --> applicable for 11g too.
I was thinking of stopping the log transfer to all the standby database locations while running the load and once I am done, then transfer all the logs and re-enable the standby to "catch up", but would it work for logical standby, too?That is the good plan. Mseberg already given Documents which you can refer for logical standby.
BTW what is your protection mode?
You can refer below links for physical standby
http://docs.oracle.com/cd/B28359_01/server.111/b28294/rman.htm#CIHIAADC
http://www.idevelopment.info/data/Oracle/DBA_tips/Data_Guard/DG_53.shtml#Physical%20Standby%20Database%20Lags%20Far%20Behind%20the%20Primary%20Database
I could not just disable all the standbys and re-create them once the release is completed because two of the standby databases are located at off-site with the limited network speed, and re-creating standby through network takes too long for us to do so.Re-creating standby is bad thinking, when you have other options.
Think how much time you can spend on performing rollforward &
how much time to re-create standbys?
Hope you have answer for this.

Standby redologs on Physical Standby

Hi all,
Oracle 10gR2
I'd already created Standby redolog files @Primary then take rman backup of datafiles,archivelogfiles and control file for restoration standby
do i still need to create standby redolog files @Physical standy (after rman restoration completes)
RMAN> DUPLICATE TARGET DATABASE FOR STANDBY NOFILENAMECHECK;
Kindly suggest.
Regards & thanks to all
Muhammad Shakeel Azeem

Hello;
No.
If you create the SRL on the Primary and then take an RMAN backup for duplicate they will be part of that backup.
Example :
RMAN RUN {
allocate channel d1 type disk;
backup format '/u01/backups/PRIMARY/df_t%t_s%s_p%p' database;
sql 'alter system archive log current';
backup format '/u01/backups/PRIMARY/al_t%t_s%s_p%p' archivelog all;
backup current controlfile for standby format '/u01/backups/PRIMARY/sb_t%t_s%s_p%p';
release channel d1;
}Restore example
run {
allocate channel C1 device type disk;
allocate auxiliary channel C2 device type disk;
duplicate target database for standby nofilenamecheck;
}Best Regards
mseberg
Double Check ( To be clear on Oracle 11, but I think it work the same on 10 )
I checked my test Standby which I created using RMAN- The SRL's are there.
But you are 10 so use this to check for them :
select * from v$standby_log;If they are not there and the database is mounted create them as follows :
ALTER DATABASE ADD STANDBY LOGFILE GROUP 4 '/u01/app/oracle/oradata/PRIMARY/redo04.log' SIZE 100M;Change path, size, names and groups as needed.
Edited by: mseberg on Mar 24, 2012 8:29 AM
Edited by: mseberg on Mar 24, 2012 8:32 AM

AC 5.3 Logical systems and multiple Physical systems

HI all:
We have set up a Logical System, and then have hooked up 2 Physical systems to it. Based on the documentation from SAP, the rule set (and the way we set it up) is at the Logical system level.
Physical system #1 is reporting the correct results, however, Physical system #2 results are not complete. My understanding is that both Physical systems should be drawing from the rule set based in the Logical system.
Results: Physical system #1 - correctly identifies 10 risks
Physical system #2 - incorrectly only identifies 5 of the expected 10 risks.
Role assignment to user is exactly same, authorizations are exactly the same. The User/Role/Profile Full Sync has been repeated as part of troubleshooting.
Has anyone experienced this? I'm looking for ideas/options on where to investigate why the results are different.
Thanks
Margaret

HI:
Thanks for answering!! I'm having trouble understanding the answers, sorry.
When you have a logical system...you upload the rules once to that system, and generate them. Then when you set up a physical system and hook it up to the logical system...the 1st, 2nd or 3rd physical system....they all use the same ruleset. The whole concept (as I understand) is that the use of Logical and Physical systems...and putting the rule set on the Logical system so you don't have to worry about one rule set taking precedence over another, is an advantage, if this is possible (ie: we don't have multiple rule sets).
Where should I be checking that the risks are defined properly? The rule set is the delivered one from SAP. The functions and risks match what we had (plus more) in the CC 4.0 system.
The first physical system we set up (example: Development) works fine, and all regular SoD risks are coming up as expected. When we added another system (example: Test)...the results of SoD analysis were incomplete.
Does that help clarify? Perhaps I'm just missing something?
Margaret
Edited by: Margaret Sokolov on Apr 28, 2009 4:34 PM

Why logical column in terms of other logical columns and not physical sourc

Hello
Can someone shed some light that in what scenario ..defining a logical column in terms of other logical column is beneficial compared to defining logical column in terms of physical sources?
I found something on google that said defining in terms of logical columns is like one time thing. I dont understand, even if you define in terms of physical source that' too one time.
In both the case we build an expression specifying which logical or physical columns.
Thank you

well logical columns from physical source, if in logical fact table you can set aggr rules. Logical columns based on other logical columns you can not. Logical columns based on other logical columns will inherit the aggr rules. So for instance, if you create col1 and col2. Both based off physical and both having sum aggr rule. If you create logical column col3 based off these two as such "col1"/"col2" it will produce the following sum(col1)/cum(col2). Now if you really wanted sum(col1/col2) then you should have made col3 based off physical as col1/col2 with aggr rule of sum.
Also of some note, all logical columns based off physical will be performed in the inner most query. So for my example above to get col3 where it is logical col1/logical col2 or sum(col1)/sum(col2) the physical query will be:
select D1.c1/D1.c2
from (
select sum(col1) as c1,
sum(col2) as c2
from tableA
) D1
So my short summary of this, is what or how do you want your sql to be created. Based on this can you lead you to your answer of whether to use logical col based on physical or other logical columns. And unltimately, check the sql generated from your work to ensure the sql queries generated are what you want and expect.
I hope this helps!

Local Client Copy and Remote Client Copy in MS - SQL Database

Dear Gurus,
If i need to do the local client copy or remote client what is the procedure i should consider because i'm using MS-SQL 2005 database.Most of the thread using Oracle database.Can u give me the step by step or manual how to make it.
Thanks an advance.
/Shah

Hi.
SAP Help is a very good source for info -> [Link|http://help.sap.com/saphelp_nw70ehp1/helpdata/en/69/c24c4e4ba111d189750000e8322d00/frameset.htm].
I suggest that you read the manual carefully. There are many tipps to improve performance (parallel processes) and tipps and tricks to avoid problems. If you need some notes, they are adviced there.
Also the notes [116787|https://websmp230.sap-ag.de/sap%28bD1kZSZjPTAwMQ==%29/bc/bsp/spn/sapnotes/index2.htm?numm=116787], [552711|https://websmp230.sap-ag.de/sap%28bD1kZSZjPTAwMQ==%29/bc/bsp/spn/sapnotes/index2.htm?numm=552711], [67205|https://websmp230.sap-ag.de/sap%28bD1kZSZjPTAwMQ==%29/bc/bsp/spn/sapnotes/index2.htm?numm=67205] or [489690|https://websmp230.sap-ag.de/sap%28bD1kZSZjPTAwMQ==%29/bc/bsp/spn/sapnotes/index2.htm?numm=489690] are interesting.
regards,
Martin

Local logical standby and remote physical standby

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