Doubt regarding REAL time redo apply in Dataguard

Friends, how to check whether 'REAL TIME REDO APPLY' is configured in my dataguard configuration. If it is not 'on' , how to enable 'REAL TIME REDO APPLY' on using dataguard broker.
Thanks in advance.

918868 wrote:
Friends, how to check whether 'REAL TIME REDO APPLY' is configured in my dataguard configuration. If it is not 'on' , how to enable 'REAL TIME REDO APPLY' on using dataguard broker.
Thanks in advance.You have to check the client process whether it is LGWR or ARCH process. The CLIENT PROCESS refers to corresponding primary database process.
SQL> SELECT THREAD#,SEQUENCE#,PROCESS,CLIENT_PROCESS,STATUS,BLOCK#,BLOCKS FROM V$MANAGED_STANDBY;
   THREAD# SEQUENCE# PROCESS   CLIENT_P STATUS           BLOCK#     BLOCKS
         0          0 ARCH      ARCH     CONNECTED             0          0
         0          0 ARCH      ARCH     CONNECTED             0          0
         0          0 ARCH      ARCH     CONNECTED             0          0
         0          0 ARCH      ARCH     CONNECTED             0          0
         1        149 ARCH      ARCH     CLOSING           61440       1244
         0          0 RFS       N/A      IDLE                  0          0
        "1        150 RFS       LGWR     IDLE               8910          1"
         1        150 MRP0      N/A      APPLYING_LOG       8910     204800

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Standby DB real time redo log apply problem

Hi all,
I am using Oracle 10g to create physical standby db. In the standby
db, normal archived log apply does not have problem, but when I try to
use redo log real time apply and issue command
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE;
it shows:
ERROR at line 1:
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What is the problem??
Thanks a lot !
Steven

Note:3633226.8 from Metalink states:
Setting a standby's RealTimeApply property to ON when there are no standby
redo logs on the standby or the standby is not in SYNC transport, will
seemingly succeed. However, the apply engine will not start. The DRC log
will report an error like ORA-38500. In this case, add standby redo logs
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standby state to ONLINE.
Workaround:
Add Standby Redo Logs on the standby and set the following broker properties
on the standby:
LogXptMode to SYNC and reset RealTimeApply to ON.
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HTH

Regarding real time java packages

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can any one give me real time scenario . or real need of the following scenarios...
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Hi,
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Find below links will help you for configuration
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http://frprjsp2.prj.fr:8000/sap/bc/srt/rfc/sap/ZPM_CREDIT_CHECK_WSD3?wsdl
http://help.sap.com/saphelp_nw04/helpdata/en/d8/3bfc3f8fc2c542e10000000a1550b0/content.htm
RFC -> XI -> WebService - A Complete Walkthrough (Part 1)
RFC -> XI -> WebService - A Complete Walkthrough (Part 1)
RFC -> XI -> WebService - A Complete Walkthrough (Part 2)
RFC -> XI -> WebService - A Complete Walkthrough (Part 2)
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The specified item was not found.
The specified item was not found.
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FILE to JDBC Adapter using SAP XI 3.0

Doubt regarding Restoring ORACLE_HOME after applying patch

While going through this doc: http://docs.oracle.com/cd/B16240_01/doc/em.102/e15294/recovery.htm
I encountered a doubt and I wanted to get it cleared:
Under the heading Restoring ORACLE_HOME they have mentioned we can remove any changes made to the inventory.
Does this mean, the patch applied will be rolled back?

While going through this doc: http://docs.oracle.com/cd/B16240_01/doc/em.102/e15294/recovery.htm
I encountered a doubt and I wanted to get it cleared:
Under the heading Restoring ORACLE_HOME they have mentioned we can remove any changes made to the inventory.
Does this mean, the patch applied will be rolled back?Yes
remember close your thread after your questions will be solved
Roshan Jose
Handle:      Roshan Jose
Status Level:      Newbie (15)
Registered:      Jan 28, 2013
Total Posts:      13
Total Questions:      2 (2 unresolved)
Name      Roshan Jose
Occupation      Oracle DBAwhy so many unresolved questions?

The redo apply seems not work

I use Oracle 11g r2 configure a data guard and fast_start fail over (using data guard broker) environment on linux.
The standby database only sync the data from the primary if
1. Issue 'alter system switch logfile;' on primary machine.
2. Cancel the redo apply and restart it on the standby.
And real-time redo apply can't start, when I issued 'ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE', the sqlplus is hanging and no response.
And in the broker, there always following warning:
Databases:
orclPri - Primary database
Warning: ORA-16829: fast-start failover configuration is lagging
orclStd - (*) Physical standby database
Warning: ORA-16829: fast-start failover configuration is lagging
Edited by: user1665703 on 2011-7-29 下午5:02
Edited by: user1665703 on 2011-7-29 下午5:04

As a quick test, go to the primary and say
SQL> select * from v$log;then connect to the standby and say
SQL> select process,status,sequence# from v$managed_standby;Show the output here with copy & paste. Also the output from the primary of
SQL> show parameter log_archive_dest_2or another destination you have setup to reach the standby.
Kind regards
Uwe Hesse
http://uhesse.wordpress.com

Real time apply dataguard

Hello
I have some doubts about real time apply.
If a transaction occurs in production, lgwr will automatically write this transaction to standby redologs in standby database.
Is this transaction applied to standby database immediately or wait for standby redolog switch and applied as soon as standby log is archived ?

Thanks Uwe.
Eventhough you mentioned this before, I just want to ask last time to confirm:
Regarding real time apply;
When a transaction occurs in production, this transaction is not applied directly to standby database.
It is first transferred to standby redolog( by the log writer of primary) and from there to standby database immediately. (I dont know which background proces is responsible for this)
Is this right?By default, the archives are transferred(on completion) to standby database server using ARCH process and received by Remote File Server process (RFS) on standby database server. Optionally, you may choose to do the same using standby redo logs instead of archive log files (LGWR and LNS processes comes into picture). The standby redo logs are compulsory for real time apply regardless of protection mode.
If you're using SRL, then redo data is transferred to SRL and once the SRL is archived the changes are written to the database using Managed Recovery Process (MRP) and hence minimizes the data loss in case of failover and minimizes the time in case of switchover and failover.
If you're using Real Time Apply, then the standby redo log data is directly written to the database using LSP or MRP without waiting for SRL to be archived.
Regards,
S.K.
Edited by: Santosh Kumar on Sep 22, 2009 3:53 PM

Real-time apply in Maximum Performance Mode Not Working

We have configured physical standby database in maximum performance mode. It's working perfectly fine. Archive logs are being applied to the physical standby.
We can open the DB in read-only mode, but real-time apply is not working. Physical standby database is lagging behind the primary db by an archive log. As soon as primary database generates an archive log, it's transported over to the standby and applied immediately by the media recovery process. But real-time redo is not working. Standby redo logs have been configured.
On Physcial Standby:
SQL> alter database recover managed standby database using current logfile disconnect ;
Database Altered.
SQL> select group#, DBID, status,first_time, last_time from v$standby_log ;
GROUP# DBID STATUS FIRST_TIM LAST_TIME
4 UNASSIGNED UNASSIGNED
5 UNASSIGNED UNASSIGNED
6 UNASSIGNED UNASSIGNED
7 UNASSIGNED UNASSIGNED
SQL> select * from v$dataguard_stats ;
NAME
VALUE
UNIT TIME_COMPUTED
apply lag
+00 00:31:36
day(2) to second(0) interval 22-JUN-2010 08:42:06
transport lag
+00 00:31:34
day(2) to second(0) interval 22-JUN-2010 08:42:06
As you could see from the output above, value of transport and apply lag is equal to the elapsed time since last archive log switch.
********* Standby init.ora
db_name = CPRD
db_unique_name = CPRDS
instance_name = CPRD
service_names = hrDBSBY.WORLD
log_archive_format = CPRD%r%s.%t
log_archive_dest_1 = "location=f:\orarch\hresysprod"
log_archive_dest_2='service=hresysprod async db_unique_name=cprd valid_for=(primary_role,online_logfile)'
log_archive_config='dg_config=(cprd,cprds)'
fal_server=hresysprod
fal_client=hresysprods
standby_file_management=auto
log_archive_trace=1
log_file_name_convert = ('hresysprod','hresysprods')
db_file_name_convert = ('hresysprod','hresysprods')
remote_login_passwordfile = exclusive
******* Primary init.ora
log_archive_config='dg_config=(cprd,cprds)'
fal_server=hresysprods
fal_client=hresysprod
standby_file_management=auto
log_archive_format = CPRD%r%s.%t
log_archive_dest_1 = "location=f:\orarch\hrESYSPROD"
log_archive_dest_2='service=hresysprods async db_unique_name=cprds valid_for=(primary_role,online_logfile)'
log_archive_trace=1
remote_login_passwordfile = exclusive
Please advise.
Thanks,
jay

Hi,
In your case you are using ARC process for redo transfer as you have not specified any process in log_archive_dest_2 and default is arch.
I will suggest you to use LGWR to transfer the redo to standby and also check the size of standby redo logs on standby is same to the size of online redo logs on primary
Regards
Anudeep

Real - Time Apply some times uses Archived log file

Hi All,
I have a doubt on real time apply in Oracle 10g 10.2.0.4 version where arch process has been configured on primary database and standby has been configured for maximum performance mode with real time apply.
But in standby alert log file i use to find below message rarely
Media Recovery Log /oraclearch/oraarch/ctdr/5548.dbf
Media Recovery Log /oraclearch/oraarch/ctdr/5549.dbfSo my doubt is why archived files are applied as standby has been configured for real time apply where it should apply only from standby online redo log files.
Also i dont find any information on standby database in the view v$standby_log that these standby online log files have been archived in archived column, so how to find how much of data has been written by rfs process on SRL's...
-Yasser

hi,
As the remote file server (RFS) process writes the redo data to standby redo log files on the standby database, log apply services can recover redo from standby redo log files as they are being filled.
please check http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/log_apply.htm
thanks,
baskar.l

Real time queries to know more about live project

Hi All,
I am new to XI, I have some doubts about real time xi project related activities.
1. Who will be responsible for preparing the minutes of meeting? (XI Developer/Team Lead/senior consultant etc)
2 In usual Dev->QA->Prod project cycle...
Where would the Configuration and Version Control come into picture?
Who is responsible for configuration process of the developed objects?
How the configuration process would be in real time XI project? Are we needed to use any external configuration/version control tools like VSS etc..?
3. I come across the terms like Legacy Systems, Third Party systems, SAP systems, Non-SAP systems, Web Systems.
In real time project, can you please answer with few names for each type of systems above I had mentioned? I know this depends on landscape of the project. But I would like to know how the names of these systems would be in real time.
Like .. for Legacy systems --> Mainframe/AS-400 etc (Pls correct me,if i am wrong).
These questions could be very basic questions for Experts. Please answer these questions.
Thanks in advance.
Latha

Hi,
1. Who will be responsible for preparing the minutes of meeting? (XI Developer/Team Lead/senior consultant etc)
In general , TL will prepare and rest of all seniors will approved/ signed if it is senior level meeting , Offcourse it depends upon the meeting .
2 In usual Dev->QA->Prod project cycle...
Where would the Configuration and Version Control come into picture?
Who is responsible for configuration process of the developed objects?
How the configuration process would be in real time XI project? Are we needed to use any external configuration/version control tools like VSS etc..?
Yes Configuration will be the developer or the senior for interface configuration / basis for SLD configuration
the respective will be the responsible
3. I come across the terms like Legacy Systems, Third Party systems, SAP systems, Non-SAP systems, Web Systems.
It depens upon the project ... dont ask like this type questions .. these are very confidential ...
I hope this is technical forum ..
Regards
Chilla
reward points if it is helpful..

ABAP interface in real time

Dear all,
Hereafter is my scenario;
My customer after sales system works on AS400. Assuming that I would manage spare parts (required for after sales) inventory, including goods entry, goods issue as well as the company financial accounting in SAP, I have to interface the two system.
From SAP to AS400: (flow1) Master files + (flow2) goods entry
From AS400 to SAP: (flow3) AR postings, (flow4) goods consumption
Then my two systems will be in line in terms of referential data (flow1), stock movement (flow2 + flow4), invoicing (flow3).
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Regards.

Real Time doesn't mean always fast. It depends on your application requirements.
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Real Time datasources

Few questions regarding REAL TIME datasources -
1)How can we identify what datasources are REAL TIME datasources in R/3?
2)Can any standard datasources be converted to REAL TIME datasources.
If yes ,what are the steps in details?
3)Why only ODS is used to load for REAL TIME datasources and not INFOCUBES.
4)Can generic datasources be built as REAL TIME datasources.

Hi,
please see my answers underneath the respective question.
1)How can we identify what datasources are REAL TIME datasources in R/3?
==> field REALTIME in table ROOSOURCE
2)Can any standard datasources be converted to REAL TIME datasources.
If yes ,what are the steps in details?
==> Yes, if the extractor can provide Real-Time data, i.e. at every point in time delta information. A negative example are FI-GL extractors which are only capable to provide data on a daily basis.
If you identify such a DataSource and the DataSource is critical to your project success, please contact me directly via EMail.
Proceeding is as follows (SPS8 is recommended):
a.) Set field ROOSOURCE-REALTIME for respective DataSource (per customer ABAP report)
b.) Replicate DataSource
c.) Create DeltaInit InfoPackage and execute
d.) Create Transformation and DTP to a DataStore Object (if applicable)
e.) Create a daemon in Real-Time Monitor (Transaction RSRDA)
f.) Locate your DataSource in the 'Not assigned' part of the tree structure
g.) Assign InfoPackage and DTP to daeomon (via context menu on the DataSource)
h.) Start the daemon
3)Why only ODS is used to load for REAL TIME datasources and not INFOCUBES.
==> Since data is immediately available for reporting and we have an open request we have a specific update processing for the data target (with a special DTP). This has currently only been implemented for DataStore Object.
4)Can generic datasources be built as REAL TIME datasources.
Yes
Cheers
SAP NetWeaver BI Organisation

Real Time Counter

Hi all,
I have a problem regarding Real time counter. I have a field in the output structure that have unique values. The name of the field is unique document name.
For example I sent a message today with a unique doc name of test-00001. How can I send another message so that its unique doc name would be test-00002? The message could be sent anytime (right after test-00001 or tomorrow).
I understand that we can set counters for messages that are passed from 1 source. What if there are multiple sources?
Regards,
IX

HI,
Just red these comments from the same blogs. See if it helps you in your case otherwise you have to go for creation of custom z-table.
Why ot just use the built in counter for the file name? In the receiver File communication channel, Processing tab,
set the file construction mode to Add Counter, and then set the counter parameters accordingly.
This is a standard feature and requires no workaround...
Why not use the built-in counter?
2009-10-06 06:17:01 Shabarish Vijayakumar Business Card
the limitations of that would be my point 5;
5. Counter option in the adapter - Only helps if you are using the NFS protocol
and also only if the counter is needed at the end of the file name (before the file name extension)
Regards,
Sarvesh

Redo apply Vs real time apply

Hi all ;
I have some confusion regarding redo apply Vs real time apply.
When applying redo data in standby site , how do we find whether it was done by redo apply or real time apply ?
Please discuss in detail. I need some clarification about this.
Thanks in advance ..

Hi baris ,
Thanks .. again little confusion. NO documents to find answer.
If a logical corruption occurs on your primary by a human mistake such as truncate table, wrong delete etc,
so a delayed standby is more appropriate. Furthermore you can configure flashback database feature
on your standby database when you use real time apply.
Is this possible ?
1) Do you mean flashback will be enabled only in standby database except primary database ?
What are the changes made in primary that only transfer to standby if so ,
2) How do we recover deleted objects in standby ?
FYI : I have a doubt with time delay option, we will discuss this things in new thread. please do NOT mind it.

11gr2 Dataguard Active Standby - Unable to get Real-Time apply working

As above, I am unable to get real time apply to work WITHOUT it switching my standby back to MOUNT state. There does not seem to be anyting obvious from the broker, or alert logs.
On the Standby:
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> alter database open read only;
Database altered.
SQL> select open_mode from v$database;
OPEN_MODE
READ ONLY
SQL> alter database recover managed standby database using current logfile disconnect;
Database altered.
SQL> select open_mode from v$database;
OPEN_MODE
MOUNTED
Primary:-
SQL> SELECT status, recovery_mode FROM v$archive_dest_status where dest_name = 'LOG_ARCHIVE_DEST_2';
STATUS RECOVERY_MODE
VALID MANAGED REAL TIME APPLY
Edited by: Imran on Apr 17, 2012 10:56 PM

Hello;
This is expected.
Works the same exact way on my system. How Redo Data is applied is set when the database is MOUNTED.
See - 6 Redo Apply Services
Data Guard Concepts and Administration 11g Release 2 (11.2) E10700-0
The document is vague on this at best, but think about the error you get if you try to start apply twice.
Data Guard Real-Time Apply FAQ [ID 828274.1]
Best Regards
mseberg
Edited by: mseberg on Apr 17, 2012 10:04 AM
h1. Test
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> alter database open read only;
Database altered.
SQL> alter database recover managed standby database using current logfile disconnect;
Database altered.
SQL> select open_mode from v$database;
OPEN_MODE
READ ONLY WITH APPLY
SQL> So I get different results ??
Edited by: mseberg on Apr 17, 2012 10:40 AM
h2. Still more
I would like to change my answer. Based on my test and queries as shown below I believe REAL TIME apply is working. Note the last log says NO because its in progress.
Checking last sequence in v$archived_log
STANDBY               SEQUENCE# APPLIED    COMPLETIO
STANDBY                     343 YES        16-APR-12
STANDBY                     344 YES        16-APR-12
STANDBY                     345 YES        16-APR-12
STANDBY                     346 YES        16-APR-12
STANDBY                     347 YES        17-APR-12
STANDBY                     348 NO         17-APR-12
6 rows selected.
----------------Last log on Primary--------------------------------------|
MAX(SEQUENCE#)
           348
1 row selected.Yes, I doubled check and it works on mine. I guess I read what I wanted to read.
All my Standby redo are setup correctly ( size and numbers )
READ ONLY WITH APPLYYour answer my be the Uwe answer at the end of this thread :
Enabling the Active Dataguard and Real Time Apply
Best Regards
mseberg
Edited by: mseberg on Apr 17, 2012 10:50 AM

Doubt regarding REAL time redo apply in Dataguard

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