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?

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[http://www.bluegecko.net|http://www.bluegecko.net]

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When I set my dataguard group to "MAXIMIZE AVAILABILITY" the protection level is always RESYNCHRONIZATION.
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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
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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.
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HTH,
FJFranken
My Blog: http://managingoracle.blogspot.com
Edited by: fjfranken on 16-jul-2010 1:13

Logical standby | archive log deleted | how to remove gap ???

hi gurus...
i have problem on logical standby
by mistake standby log coming to logical standby has been deleted , now how to fill up the gap ???
ON STANDBY
SEQUENCE# FIRST_CHANGE# NEXT_CHANGE# APPLIED
228 674847 674872 YES
229 674872 674973 CURRENT
230 674973 674997 NO
231 674997 675023 NO
232 675023 675048 NO
233 675048 675109 NO
234 675109 675135 NO
235 675135 675160 NO
236 675160 675183 NO
237 675183 675208 NO
238 675208 675232 NO
239 675232 675257 NO
240 675257 675282 NO
241 675282 675382 NO
242 675382 675383 NO
243 675383 675650 NO
244 675650 675652 NO
245 675652 675670 NO
246 675670 675688 NO
247 675688 675791 NO
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ALERT LOG OF STANDBY
Fri May 7 12:25:36 2010
Primary database is in MAXIMUM PERFORMANCE mode
RFS[21]: Successfully opened standby log 5: '/u01/app/oracle/oradata/BEST/redo05.log'
Fri May 7 12:25:37 2010
RFS LogMiner: Registered logfile [u01/app/oracle/flash_recovery_area/BEST/archivelog/archBEST_248_1_715617824.dbf] to LogMiner session id [1]
but i dont have standby log after 229 sequence ...
ON PRIMARY
SYS@TEST AS SYSDBA> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /u01/app/oracle/flash_recovery_area/TEST/standlogOldest online log sequence 247
Next log sequence to archive 249
Current log sequence 249
what to do next to apply sequences and bring both in sync.
please help me ,,,,
Edited by: user12281508 on May 7, 2010 9:45 AM

thanks for response.
no its pure logical standby
i have tried to ftp the archive logs of primary to standby and applied manually
SYS@BEST AS SYSDBA> alter database register logfile '/u01/app/oracle/flash_recovery_area/BEST/archivelog/archBEST_230_1_715617824.dbf';
alter database register logfile '/u01/app/oracle/flash_recovery_area/BEST/archivelog/archBEST_230_1_715617824.dbf'
ERROR at line 1:
ORA-01289: cannot add duplicate logfile
SYS@BEST AS SYSDBA> alter database register logfile '/u01/app/home/archTEST_230_1_715617824.dbf';
alter database register logfile '/u01/app/home/archTEST_230_1_715617824.dbf'
ERROR at line 1:
ORA-01289: cannot add duplicate logfile
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Physycal Standby archive log gap....

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1) Yep running 9i.. But still its not shipping...Are FAL_CLIENT & FAL_SERVER parameters are defined at standby level?
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Hi all,
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Hello All,
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Does these results look good queried from two instances. I am kind of concerned about the Group3 that has the same name for both the members.
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MEMBER
+DATA/prod/onlinelog/group_2.264.706892209
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+DATA/prod/onlinelog/group_1.261.706892209
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===
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====
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Hi San,
sannidhi wrote:
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shutdown abort
startup
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why ?

A better solution would be to create a job at the OS level that
would run automatically at set times to backup the archive logs
to another location, then remove the backed up logs from your
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Active dataguard physical standby

Hi,
Is it possible to create additional tables and do DML operations on them ( these tables will not be present on primary db) in physical standby database created by active data guard.
Regards,
prasad.

Is it possible to create additional tables and do DML operations on them ( these tables will not be present on primary db) in physical standby database created by active data guard.Prasad,
Here Active datagaurd feature is only for READ ONLY or reporting purpose, where you can perform only Select queries which is from 11gRx at the same time recovery also will be active.
If you want to open database in Read & Write , There there would be no consistent with Primary database, These behaves as different databases.
So Either you have to use flashback option after completing your REad & Write options,
Again you will lost all of the data, whatever you performed DML operations. So this is no use again.
You can use this note for that procedure *How To Open Physical Standby For Read Write Testing and Flashback [ID 805438.1]*
But i can say conclusion to make your standby high available your DML operations are not supported, ofcourse supported but its not High availability.
Hope this clears.
You seems to be new user to OTN , consider closing the thread as answered, Keep the forum clean. https://forums.oracle.com/forums/ann.jspa?annID=718
Edited by: CKPT on Mar 19, 2012 11:38 AM

Step by step 10g Dataguard , physical standby database setup metalink notes

On metalink i saw this note, but unable to find now if someone can help....

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Edited by: hqt200475 on Sep 7, 2011 8:55 AM

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Please check below link
http://odenysenko.wordpress.com/2012/03/26/rman-duplicate-from-active-database-from-standby-ends-with-ora-01671/
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Hi Experts
we have a realtime downstream replication that is using the a location in ASM to put the shipped logs files.
set up by
ALTER SYSTEM SET LOG_ARCHIVE_DEST_2='LOCATION=+BOBOASM/NANPUT/standbyarchs/
VALID_FOR=(STANDBY_LOGFILE,PRIMARY_ROLE)' Scope=BOTH;
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Hello Haggylein
check this out, seems to work
--- redologs used or not?
---- when purgeable we can delete it
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COLUMN FIRST_SCN HEADING 'First SCN' FORMAT 99999999999
COLUMN NEXT_SCN HEADING 'Next SCN' FORMAT 99999999999
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SET SPACE 0
SET LINESIZE 150
SET PAGESIZE 0
SET TERMOUT OFF
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SET FEEDBACK OFF
SET HEADING OFF
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spool off
exit
# eventually we can call it from a script
# !ksh
# delete of the shipped redologs
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# not to be used on
$HOME/bin/export ORACLE_SID=+ASM2
./list_purgeable_arch_redologs.ksh
exit

10g dataguard - physical standby database

Hi Guys,
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;
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recover standby database until cancel;
alter database activate standby database;
thanks

Hi,
In 10g version, you can open database database with READ ONLY mode. In that case standby database
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I see you steps you using ALTER DATABASE ACTIVATE STANDBY DATABASE statement for activating database
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If you are not need convert standby database to primary database then , you must use only
ALTER DATABASE OPEN READ ONLY;
Regards
Mahir M. Quluzade
www.mahir-quluzade.com

Dataguard physical standby archive log question

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