Data Guard on Win2003 R2 & Oracle 9.2.0.8

Hi Team. We have 28 databases oracle 9208 in a windows 2003 R2 Server and we need to create a contingency in a server that is exactly the same as the primary (hardware, OS, patch level and directory structure).
Questions:
1- It is possible to create data broker configurations for all db?
2- How can I configure Windows database services in standby server so when it reboot doesn't startup standby databases?
3- Does anybody have an step-by-step guide for configuring dataguard 9208 on windows servers?
Thanks in advance!

A Broker configuration is tied to a set of databases. The configuration files are stored on each database's system and the broker processes all run on each database in a configuration. So there is no concept of 28 configurations on one system. if you have 28 Primary databases on one system with 28 standby on another system then you will have 28 broker configurations defined with the configuration files and processes for each database stored/running on each database.
If you have 28 systems each with its own Primary and 28 corresponding standby systems with a corresponding standby for each Primary then you will have 28 broker configurations defined with the configuration files and processes for each database stored/running on each database.
So I am not sure what you are asking.
But yes, you can always do manual switchover/failover. See the manual - http://download.oracle.com/docs/cd/B10501_01/server.920/a96653/role_management.htm#1033701
Larry

Similar Messages

Will Oracle Data Guard be replaced by Oracle Stream soon?

Will Oracle Data Guard be replaced by Oracle Stream soon?
In my opinion Oracle Stream can replace Oracle Data Guard completely.
Message was edited by:
frank.qian

While some of the technologies that underpin Streams are being increasingly incorporated into DataGuard, it's quite unlikely that DataGuard will go away.
Streams is the successor to Advanced Replication, which is designed to allow a source database to propagate data to a distinct database in a different environment without necessarily having to have the two databases tightly coupled. You can have different databases in different regions managed by different DBA groups who don't necessarily care whether any of the other systems are up using Streams (or Advanced Replication before it). Failing over between these systems, while possible, requires a fair amount of custom scripting, but is certainly possible.
DataGuard, on the other hand, is designed to allow you to have multiple copies of the same database that are tightly coupled for high availability. Similar in concept, but there are very different trade-offs in the design.
That said, Streams and Logical Standby both use very similar technologies to mine the redo information for change records. As DataGuard uses Logical Standby more and more, potentially as a replacement for physical standby, they'll use more and more of the same underlying technologies. They'll still be very different products.
Justin

Can't install Data Guard using DBCA in Oracle 11g Release 2

I have installed Oracle database 11g Release 2 successfully. I have installed Label Security using DBCA, now when I am installing Database Vault using DBCA, it gives message "ORA-01017: invalid username/password; logon denied" and exists back to DBCA.
What step I am missing? please suggest.
Regards and thx,

Hi,
I had the same issue too. I installed it on my desktop (server class option). Everything else including EM is working fine. However I got around the issue to an extent by manually running the catalog scripts for database vault. It should be located under $ORACLE_HOME/rdbms/admin. You have to run the script catmac.sql. There is a catch though. You need to go through the contents of the script and execute the other scripts manually by supplying username and passwords (yes, it sucks!!) but I don't find any help on metalink for this issue.
Currently I am trying to create the realms but I am denied permission due to lack of "OPERATOR TARGET" privileges.
If someone can lead me to the correct place where I can look for what is missing, it would be great.
Thank you
Kumar Ramalingam

Data Guard with diff Oracle Versions??

Hi,
I have one query on Data Guard.
Can I config. data guard with two different Oracle versions?
i.e Primary=> 8i
stand by=> 10g
OR either way. Pls post your comments
JAI HIND
Darshan

Some of the parameters that you need to have with Physical standby database are :
*.background_dump_dest='/ford/app/oracle/admin/xchbot1/bdump'
*.compatible='9.2.0.7'
*.control_files='/home30/oradata/xchange/xchbot1/control01.ctl','/home30/oradata/xchange/xchbot1/control02.ctl','/home30/orad
ata/xchange/xchbot1/control03.ctl'
*.core_dump_dest='/ford/app/oracle/admin/xchbot1/cdump'
*.db_block_buffers=1024
*.db_block_size=8192
*.db_file_multiblock_read_count=8# SMALL
*.db_files=1000# SMALL
*.db_name='xchbot1'
*.global_names=TRUE
*.log_archive_dest_1='LOCATION=/home30/oradata/xchange/xchbot1/archivelog'
*.log_archive_dest_2='SERVICE=standby'
*.log_archive_dest_state_2='ENABLE'
*.log_archive_format='arch_%t_%s.arc'
*.log_archive_start=true
*.log_buffer=16384000# SMALL
*.log_checkpoint_interval=10000
*.max_dump_file_size='10240'# limit trace file size to 5 Meg each
*.parallel_max_servers=5
*.parallel_min_servers=1
*.processes=50# SMALL
*.rollback_segments='rbs01','rbs02','rbs03','rbs04','rbs05','rbs06','rbs07','rbs08','rbs09','rbs10'
*.shared_pool_size=67108864
*.sort_area_retained_size=2048
*.sort_area_size=10240
*.user_dump_dest='/ford/app/oracle/admin/xchbot1/udump'

Remove Data Guard Broker configuration file

Hi,
We have a data guard configuration running on Oracle 10g RAC (2 nodes) ASM. After failover, we rebuild the old primary as physical standby. But every time when enable the data guard broker, it created problems. So the best solution for us seems to completely remove the data guard broker configuration and recreate them. Here are our steps
On both primary and standby
1) alter system set DG_BROKER_START=FALSE
2) shutdown database
3) use asmcmd command to remove the broker directory under +DATA/dbname/DG_BROKER
4) start the database
5) alter system set DG_BROKER_START=TRUE
6) go through the many steps to recreate data guard broker configuration
I am just curious whether this is the right way and whether there is any simple way?
Thanks in advance

Hi, I saw same issue when doing switchover testing in my lab environment.prerequisite is primary role and standby role switched and og can be applied without data guard broker.
Here is the step I resolved the issue
1)on both primary and standby database
SQL> alter system set dg_borker_start=false;
on primary DB:
SQL>alter system set dg_broker_config_file1='?/dbs/dr1afterswichoverpry.dat';
SQL>alter system set dg_broker_config_file1='?/dbs/dr2afterswichoverpry.dat';
on standby DB:
SQL>alter system set dg_broker_config_file1='?/dbs/dr1afterswichoverstby.dat';
SQL>alter system set dg_broker_config_file1='?/dbs/dr2afterswichoverstby.dat';
2) enable dg_borker_start on both primay and sandbby db
SQL> alter system set dg_borker_start=true;
3)on primary database to create configuration
Hope this can help you!
email: [email protected]

Multiple Location of datafiles in Data Guard Environment

I have Data Guard setup in my oracle 10g database. Uptil now , all the datafiles were at same location, therefore db_file parameter setting in pfile was fine. Now I want to move my few of the datafiles at another location. Say, few of my datafiles would be in F:\ and some of them in G:\. How do I now set db_file parameters in Pfile ?

OK...
Alter database rename should be ok As long as both the PRIMARY directory strucures are same or if you have set the parameter db_file_name_convert
While asking a question..
You should post all the necessary information for us to help(is possible)
1.Oracle version
2.Os version
Thread spesific
3.Directory strucutrs of Both Priimary and Standby
4.Init .Ora of both PRIMARY AND STANDBY

11g Data guard 建physical standby database配置相关问题

General information
OS:red hat Linux 2.6.32-200.13.1.el5uek x86_64(primary,standby)
Home version:11.2.0.3(primary,standby)
Situation:
实验用库，想学习data guard，在另一个服务器上克隆了一个HOME并按照官方文档http://docs.oracle.com/cd/E11882_01/server.112/e25608/create_ps.htm#i1225703
中去实验，步骤均按照官方文档来,最后在mount standby库时校验select sequence# from v$archived_log没有记录，出错日志如下（从mount开如截取）
standby alert_dbacoe.log
Error logs
alter database mount
Completed: alter database mount
Error 604 received logging on to the standby
+FAL[client, ARC2]: Error 604 connecting to PRIMARYSV for fetching gap sequence+
Errors in file /u05/oracle/app/oracle/diag/rdbms/standby/dbacoe/trace/dbacoe_lgwr_1912.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u04/app/oracle/redundancy/dbacoe/redo01_s.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 1 thread 1: '/u03/app/oracle/oradata/dbacoe/redo01.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /u05/oracle/app/oracle/diag/rdbms/standby/dbacoe/trace/dbacoe_lgwr_1912.trc:
ORA-00313: open failed for members of log group 1 of thread 1
ORA-00312: online log 1 thread 1: '/u04/app/oracle/redundancy/dbacoe/redo01_s.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 1 thread 1: '/u03/app/oracle/oradata/dbacoe/redo01.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /u05/oracle/app/oracle/diag/rdbms/standby/dbacoe/trace/dbacoe_lgwr_1912.trc:
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1: '/u04/app/oracle/redundancy/dbacoe/redo02_s.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 2 thread 1: '/u03/app/oracle/oradata/dbacoe/redo02.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /u05/oracle/app/oracle/diag/rdbms/standby/dbacoe/trace/dbacoe_lgwr_1912.trc:
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1: '/u04/app/oracle/redundancy/dbacoe/redo02_s.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 2 thread 1: '/u03/app/oracle/oradata/dbacoe/redo02.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /u05/oracle/app/oracle/diag/rdbms/standby/dbacoe/trace/dbacoe_lgwr_1912.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/u04/app/oracle/redundancy/dbacoe/redo03_s.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 3 thread 1: '/u03/app/oracle/oradata/dbacoe/redo03.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
Errors in file /u05/oracle/app/oracle/diag/rdbms/standby/dbacoe/trace/dbacoe_lgwr_1912.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '/u04/app/oracle/redundancy/dbacoe/redo03_s.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ORA-00312: online log 3 thread 1: '/u03/app/oracle/oradata/dbacoe/redo03.log'
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
ARC3: Archival started
ARC0: STARTING ARCH PROCESSES COMPLETE
Addition:
因为是实验用库，所以结构有点怪，大体如下:
Primary
数据文件在BASE所在的oradata下即/u03/app/oracle下,
redo文件每组两份，一份在oradata下，另一份在同机的/u04/app/oracle/redundancy中（以_s结尾命名）
archive文件在/u04/app/oracle/fast_recovery_area中
standby
数据文件在/u05/oracle/app/oracle/oradata下
redundancy中的redo文件随着该目录放到oradata下的red中了
archive文件目录则是/u05/oracle/app/oracle/fast_recovery_area中
接下来是对应的init文件与TNS信息
Primary端的init主要信息
db_unique_name='PRIMARY'
fal_client='PRIMARYSV'
fal_server='STANDBYSV'
log_archive_config='DG_CONFIG=(PRIMARY,STANDBY)'
log_archive_dest_1='location=/u04/app/oracle/fast_recovery_area/DBACOE/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) db_unique_name=PRIMARY'
log_archive_dest_2='service=STANDBY ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) db_unique_name=STANDBY'
log_archive_dest_state_1='enable'
log_archive_dest_state_2='enable'
db_file_name_convert='/u05/oracle/app/oracle/oradata/dbacoe','/u03/app/oracle/oradata/dbacoe',/u05/oracle/app/oracle/oradata/red','/u04/app/oracle/redundancy'
log_file_name_convert='/u05/oracle/app/oracle/fast_recovery_area/DBACOE/archivelog','/u04/app/oracle/fast_recovery_area/DBACOE/archivelog'
Standby端的init信息
log_archive_config='DG_CONFIG=(PRIMARY,STANDBY)'
db_unique_name='STANDBY'
db_file_name_convert='/u03/app/oracle/oradata/dbacoe','/u05/oracle/app/oracle/oradata/dbacoe','/u04/app/oracle/redundancy','/u05/oracle/app/oracle/oradata/red'
log_file_name_convert='/u04/app/oracle/fast_recovery_area/DBACOE/archivelog','/u05/oracle/app/oracle/fast_recovery_area/DBACOE/archivelog'
log_archive_dest_1='location=/u05/oracle/app/oracle/fast_recovery_area/DBACOE/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) db_unique_name=STANDBY'
log_archive_dest_state_1=enable
log_archive_format=log%t_%s_%r.arc
log_archive_dest_2='SERVICE=PRIMARYSV ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=PRIMARY'
log_archive_dest_state_2=enable
TNS信息如下(均能tnsping通）
PRIMARYSV =
+(DESCRIPTION =+
+(ADDRESS = (PROTOCOL = TCP)(HOST = db1.ad.xxxxxx.com)(PORT = 1521))+
+(CONNECT_DATA =+
+(SERVER = DEDICATED)+
+(SERVICE_NAME = dbacoe)+
+)+
+)+
STANDBYSV =
+(DESCRIPTION =+
+(ADDRESS = (PROTOCOL = TCP)(HOST = db2.ad.xxxxx.com)(PORT = 1529))+
+(CONNECT_DATA =+
+(SERVER = DEDICATED)+
+(SERVICE_NAME = dbacoe)+
+)+
+)+
PS：请大家花费一点点时间阅读一下这冗长的段子，刚开学data guard，参数上设置都很生疏，（光照着文档做了，是否有redo log相关的操作遗漏？）敬请指教
Edited by: 961394 on Dec 10, 2012 1:52 AM
Edited by: 961394 on 2012-12-10 上午4:58

结贴了，感谢maclean一群的Jesse Lui帮我解决问题

Data guard 11g vs 10g

Does data guard run in 11 g primary and 10g standby vice verca in any situation physical or logical.
Is the any possibility.

Hello,
You can find here a White Paper about "Data Guard" (and RAC) in Oracle 11g:
[http://www.oracle.com/technology/deploy/availability/pdf/dataguard11g_rac_maa.pdf]
In 11g, it seems (in §3.3) that the requirement about using the same Database version was "relaxed".
But OK! it's just a white paper and, I think that this point should be cleared in detail with Oracle Support
document.
Best regards,
Jean-Valentin

Important Data Guard informations

I'm reading some white papers on data guard and also the Oracle documentations, but I still don't have found what I'm searching...
I've two environments... a 3 nodes RAC (10gr2, 10.2.0.4.0) and a 2 nodes RAC (11g, still never patched).
I would like to realize a data guard configuration formed by 3 nodes as primary site and the 2 nodes as standby site.
This is what I've planned:
- upgrade 3 nodes from 10g to 11g
- apply latest oracle patches for 11g on 3 nodes and 2 nodes
- move current schema (there's only one schema) from 2 nodes to 3 nodes (there are only two schemas)
- prepare the 2 nodes to be used as standby database
- mode to data guard configuration
My questions are:
1) Is it possible to use 3 nodes as primary database and 2 nodes as standby database ? I mean... Is it possible to have two sites that are not identical ?
I just can image that 2 nodes as standby database don't provide for the same service performance profile in case of a failover, but for current traffic 2 nodes are really enough.
2) In case of a disaster on primary site, the failover starts automatically or I need to manually start the standby database ? If there's a way to automatically start the standby database, I'm expecting this is completely transparent to applications connected to the database, at least to the new connections... is it right ?
3) If there's a need to apply a patch at clusterware level, use of a data guard configuration allows me to have an "always available" database ?
I mean... some patches (especially those for clusterware level) are not available for "rolling upgrade" and I need to shutdown my instance: on a data guard configuration (formed by RAC sites) is this still true ?
Thanks.

I don't know all the answers but here is some to get the thread started:
My questions are:
1) Yes, it is possible to have different number of nodes for your primary and standby sites...meaning a 3 node primary can have a dataguard configuration to a 2 node.
2) Yes, you can configure something labeled fast-start failover and I beleive it is incorporated in with dataguard broker. I'm not sure about this being transparent to the user, if they use apps. that rely on clusterware service availabillty will see a temporary suspension of service during the role change.
3) This I'm unsure of but want to say that it should be possible to do a role switch and bring a site down to patch and then resume operation, resolve the gap and do another role switch. I say I think it should be possible because it is possible to have dataguard from a rac database to a standalone so in that instance you are running differently.

Difference between Manual Standby and Data Guard Broker..

hi,
could any let me know any usefull docs which help to understand the difference between manual dr and data guard broker?
thanks,

>
could any let me know any usefull docs which help to understand the difference between manual dr and data guard broker?
>
Without Data Guard Broker:
http://www.oracle.com/pls/db112/to_toc?pathname=server.112/e17022/toc.htm
With Data Guard Broker:
http://www.oracle.com/pls/db112/to_toc?pathname=server.112/e17023/toc.htm
See especially why you want to use the broker:
http://download.oracle.com/docs/cd/E11882_01/server.112/e17023/concepts.htm#i1013106
In short: You should have a good reason if you do not use the broker, because it is the officially recommended way to maintain Data Guard. It is even required for some features like Fast-Start Failover.
Kind regards
Uwe Hesse
http://uhesse.wordpress.com

Read-only agent synching to a Data Guard physical standby?

Hi all,
we are trying to use TimesTen 11.2.2.4.1 as a read-only memory cache for an Oracle 11.2.3.0.7 schema on Linus RedHat 6.3, while using Oracle Data Guard to replicate the Oracle instance over geographically remote sites. On each site we would like to have two TT instances synchronizing with the local Oracle 11g instance. This works fine against the master DB, but are the TT agents going to be able to synchronize against physical standby instances?
The problem it seems is that the TT agent uses dedicated structures in the Oracle master instance (related to the cache grid), which are going to be replicated into the standby instances. Is the TT agent able to use the read-only, replicated structures to complete synchronization, or is this approach unworkable? What would be your advise as how to achieve this?
Thanks for your help,
Chris

Hi again,
so after testing a little bit it appears that this approach works indeed, at least against a limited number of manual DML operations. What I needed to do on the slave instance to have it working is the following:
1 - Entirely exclude TTADMIN and TIMESTEN schemas from the Data Guard replication:
ALTER DATABASE STOP LOGICAL STANDBY APPLY;
execute dbms_logstdby.skip(stmt => 'SCHEMA_DDL', schema_name => 'TTADMIN', object_name => '%');
execute dbms_logstdby.skip(stmt => 'SCHEMA_DDL', schema_name => 'TIMESTEN', object_name => '%');
execute dbms_logstdby.skip(stmt => 'DML', schema_name => 'TTADMIN', object_name => '%');
execute dbms_logstdby.skip(stmt => 'DML', schema_name => 'TIMESTEN', object_name => '%');
ALTER DATABASE START LOGICAL STANDBY APPLY IMMEDIATE;
2 - Erase both schemas from the local instance:
DROP USER TTADMIN CASCADE;
DROP USER TIMESTEN CASCADE;
CREATE USER TTADMIN etc
3 - Temporarily disable the database guard while creating the local ttCache structures, as the scripts seem to need to set a table-level lock on the source table:
ALTER DATABASE GUARD NONE;
ttIsql> CREATE READONLY CACHE GROUP etc
ALTER DATABASE GUARD STANDBY;
4 - Unset the "Fire_Once_Only" property for the local TTADMIN triggers:
execute dbms_ddl.set_trigger_firing_property(trig_owner=> 'TTADMIN', trig_name=> 'TT_06_70560_T', fire_once => FALSE);
At that point the cache seems to replicate properly in the most simple cases. I will try to test with some substantial load and against DG failovers to see how this behaves.
Regards,
Chris

What is the major plus with Data Guard compare to standby

Hi,
We don't need active active replication between our prod and DR, our DR can be 20 minutes RPO (Recovery Point Objective) so what is the main advantage of configuring and installing oracle data guard compare to a simple standby server?
My understanding of data guard is a that oracle will ship your log auto on the DR and apply it instead of me, doing it with 2 script (one on primary server that ship log over, the second on standby that apply the archive log).

1. Your Primary site get hit by something you can failover to the standby.
2. If you have a large group of "Reader" users on the Primary you can switch them to the Standby using Active Data Guard.
3. You can do a switchover and avoid an outage if your Primary server needs work of any kind.
4. You can preform backup at either site taking even more load off you primary if needed.
or as the books says:
Disaster recovery, data protection, and high availability.
Down Side
1. Cost
2. Network Load (or additional load)
Edited by: mseberg on Feb 7, 2011 10:23 AM

What are the oracle processes involved in Data Guard Operation

Hi All,
I have a Primary and secondary physical standby database.
I want to know what are the oracle processes involved in the synchrnization between primary and secondary.
Thanks
Santosh

The best place to get this information is Data Guard Concepts and Administration Guild
The link for 10g Release 2
http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14239/concepts.htm#i1039416
The link for 10g Release 1
http://download-west.oracle.com/docs/cd/B14117_01/server.101/b10823/concepts.htm#1039415
The link for Oracle 9i
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96653/concepts.htm#1027493

Urgent : ORA-01426: numeric overflow on oracle 11g Active Data Guard

Hi
I have configured Active Data Guard on oracle 11g, for reporting purpose we will select mutliple querry on target side(10 users). we are getting 'numeric overflow erro'r on alert log file When we issuing multiple query on target side. PLeae let me know is this error will cause performance degrad. if it will degrade performance mean please tell me how to resolve this problem. Why the numeric overflow is comming . and it is not comming in the primary database, it is comming in standby database only. please any one help it is very urgent
is there any parameter To overcome this problme
Please please it is very important to me and very urgent .
Thanks
nafees
Edited by: Nafees on Jan 1, 2009 3:44 AM
Edited by: Nafees on Jan 1, 2009 3:54 AM

There is no one drowning.
Your house is not on fire.
The volcano has not exploded.
Please apologize for abusing this forum by claiming your issue is more urgent than other people's requests.
Then, and only then, should anyone help you. I know I certainly won't until I read your sincere apology and promise not to be abusive in the future.

What is the role of Lns process in oracle 10g data guard

Hi ,
plz help me out to find out the actual working of lns process in oracle 10g data guard
when i use SYNC redo transport
the output of v$managed_stanbdy is like that ..
PROCESS PID STATUS CLIENT_PROCESS GR# SEQ#
ARCH 9258 CLOSING ARCH 2 498
ARCH 9260 CLOSING ARCH 1 499
ARCH 9262 CLOSING ARCH 2 496
ARCH 9264 CLOSING ARCH 1 497
LGWR 9206 CLOSING LGWR 2 482
its not display any info about lns,thats means lns is not working in SYNC redo transport mode ?
but if i changed it to ASYNC then the out put of v$managed_stanbdy is like this ..
PS PID STS CPS GR# SEQ#
ARCH 9258 CLOSING ARCH 1 509
ARCH 9260 CLOSING ARCH 2 510
ARCH 9262 CLOSING ARCH 1 505
ARCH 9264 CLOSING ARCH 2 508
LGWR 9206 CLOSING LGWR 1 503
LNS 10528 CLOSING LNS 2 510
Now it display all the info about lns process...
i read in oracle documentation that lns process send redo data from primary,( through network service ) to RFS on standby side.
but first output means that lns is not working,if not then which process send redo from primary to RFS on standby ?
i also read in some blog that lgwr use some extra buffer size from primary db SGA ,to write redo in that buffer ,ans lns read redo from that buffer and send it to RFS on stanby side,
i m totally confused ..can u plz help me with correct logic behind this .
thanx in advance.

Hello,
On the primary database when you run the v$managed_standby, it shows up the LNS process as this process sends redo info to the standby database and on the standby database the RFS process receives the redo information.
So on the primary database when you query the v$managed_standby, it shows up LNS and on the standby database when you query the v$managed_standby it shows up RFS. Please let us know where you are running the query.
Refer this http://datadisk.co.uk/html_docs/oracle_dg/architecture.htm
969752
Handle:     969752
Status Level:     Newbie
Registered:     Nov 6, 2012
Total Posts:     9
Total Questions:     2 (2 unresolved)
Name     Hemendra Singh
Location     NoidaPlease consider closing your questions by providing appropriate points and marking it as answered. Please keep the forum clean !

Data Guard on Win2003 R2 & Oracle 9.2.0.8

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