Database replication between Oracle RAC and Oracle Standalone DB

Hi,
We have currently 4 node RAC environment and Oracle RAC implementation with 4 Oracle instances. We want to move the one instance and make it Standalone with Oracle database due to availability issue. Thus we will remain with 3 nodes on the RAC database and one Standalone database. We want to implement Oracle replication on this solution, where partial database of RAC environment needs to be replicated to Standalone node.
We will have Oracle 9i database server for both RAC and Standalone machine.
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?
2. Is it feasible to sychronize around 25GB data between servers?
3. What can be estimated time for refresh or Synchronization?
Thanks in advance for help.

The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.
Please let me know if we need to look for some other methods of replication also.

Similar Messages

Database replication between Oracle RAC and Oracle Standalone DB in 9i

Hi,
We have currently 4 node RAC environment and Oracle RAC implementation with 4 Oracle instances. We want to move the one instance and make it Standalone with Oracle database due to availability issue. Thus we will remain with 3 nodes on the RAC database and one Standalone database. We want to implement Oracle replication on this solution, where partial database of RAC environment needs to be replicated to Standalone node.
We will have Oracle 9i database server for both RAC and Standalone machine.
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?
2. Is it feasible to sychronize around 25GB data between servers?
3. What can be estimated time for refresh or Synchronization?
The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.
Please let me know if we need to look for some other methods of replication also.
Thanks in advance for help.

ManojMac wrote:
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?Streams is another option
2. Is it feasible to sychronize around 25GB data between servers?Sure. Depending on the rate of change, your latency requirements, whether the standalone database has the horsepower to apply all the changes generated by to other three nodes, etc.
3. What can be estimated time for refresh or Synchronization?Depends on the architecture, the network connection, whether you are doing incremental refreshes, etc. And it depends on what time you're measuring-- you might be measuring the latency between the RAC cluster and the standalone database, you might be measuring the time it takes to incrementally refresh a single materailized view when there have been no changes, you might be measuring the time it takes to do a complete refresh of an entire refresh group, pulling 25 GB of data over the network.
The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.DataGuard is not an option if you only want to replicate a subset of the data. The two realistic options are materialized views and Streams. Are you anticipating that you will be making changes on both nodes? If not, you can use simple materialized views rather than multi-master replication.
Since 9.2 is not longer covered by Premier Support, are you planning to upgrade to a supported version in the near future? In particular, Streams works a lot better in later versions of the database.
Justin

Which is the difference between Oracle RAC and Oracle Clusterware?

Hi all, maybe this is a stupid question, but I've read the documentation, and still don't understand which is the difference between RAC and Clusterware.
Can anybody explain it to me?
Thanks in advance!

RAC is database option part of Oracle Database software needed to have database running in cluster mode; see http://download.oracle.com/docs/cd/E11882_01/server.112/e16508/glossary.htm#CNCPT2076.
Clusterware is separate software needed to run Oracle Database in cluster mode: you can use Oracle Clusterware without Oracle Database but you cannot use Oracle Database with RAC option without Oracle Clusterware.
See http://download.oracle.com/docs/cd/E11882_01/rac.112/e16794/intro.htm#BABCHEEE.
Edited by: P. Forstmann on 19 nov. 2010 19:11
Edited by: P. Forstmann on 19 nov. 2010 19:11

Oracle RAC and Oracle Secure Backup Express

I am building a new RAC environment - 7-Nodes on Linux.
We are very interested in reviewing Oracle Secure Backup, possible Oracle Secure Backup Express.
My understanding about Oracle Secur eBackup Express is it is licensed "free" as long as you are working with a single tape drive.
Does anyone know - does this apply to RAC as well?
Thanks

Please refer to the OSB licensing document for
specific differences between OSB-XE and OSB:
http://download-west.oracle.com/docs/cd/B32520_01/doc/
license.101/b25528/toc.htm
In general, we recommend you backup each RAC node to
insure all local files are protected which would mean
the OSB-XE edition would not be recommended since
OSB-XE is backup of one server.Thank you - I will review this.
.. and your White Papers regarding performance were just what I was looking for.

Robust messaging between Oracle RAC and Oracle XE

We ran into Bug 13484963 (ORA-3146 from AQ propogation from 11.2.0.3 to 11.2.0.2) - which means that a 11.2.0.3 queue fails to propagate to a 11.2.0.2 queue, due to this bug (ORA-03146: Invalid buffer length for TTC field).
I described the error in posting Bug 13484963: 11.2.0.3 AQ to 11.2.0.2 in the AQ forum, but no responses.
My question to this forum is what alternatives are there are to AQ, for passing XML/CLOBs robustly between a 11.2.0.3 platform and a 11.2.0.2 platform, when the network is at times not robust.
For example, rolling a custom PL/SQL solution will need to use a db link to push data across. If that tcp connection breaks without sender or receiver getting a FIN/RST bit set in a packet, the party will not know the tcp connection broke. And will wait. Forever. Until terminated externally (e.g. alter system disconnect session). There is no tcp timeout. There is no TcpKeepAlive option supported with such a db link connection. This requires more custom processing for monitoring existing custom processes (b-brain monitoring a-brain issue). Gets ugly.
With AQ for example, this is not a problem as it handles the same issue without a problem (likely internal code timeouts set via signal/event handlers?).
Any suggestions as how one can address the basic requirement for pushing XMLs (as CLOBs) with minimal hacking between databases without AQ?

We have a "solution" that requires a data push from 11.2.0.3 to XE in this our case the size of data to be sent is fairly small (20-30 rows) and the target system does not require updates on every row change, data is pushed every 15 seconds across a database link using as merge statement executed in a pl/sql package run by a scheduler job. To mitigate for delays and network issues the job is monitored and shot in the head if it takes longer than 10 seconds, as you are dealing with clobs I'm not sure if this will work as
Another alternative we have looked at is Continuous Query Notification, this only got as far as a proof of concept as the customer changed their mind in our case the requirement was to push a small subset of the rows inserted into a table into a remote database to enable our monitoring team to check for certain types of activity the solution was a java process that registered a query on the source database and when notified of a change grabbed the rows and inserted them into the target, as we where looking at only a small set of rows (80-300 rows per day out of 1.5-2 million inserts) and the target application was written in java this proved workable.
Neither solution is elegant, particularly scalable or lacking in PL/SQL Hacks and in our case both are workarounds to an inflexible core application and new requirements that do not generate large revenue, currently we are looking at upgrading the XE databases to SEONE so that we can get support, patches and upgrades and move over to AQ for these type of problems.

Frequently transfering databases between MS SQL and Oracle

Hello all,
I am looking for a solution to easily, efficiently and be able to migrate/transfer databases between MS SQL and Oracle frequently.
I need to be able to replicate a databases on Ms SQL and Oracle for testing purposes. I will need to do this on frequent basis - almost once a week.
Please suggest what would be the best way.
Thanks in advance.

Hi Justin,
You have guessed it right to a great extend. Yes dont actually need to develop, rather need to test an application that supports SQL and Oracle databases. Now when testing the application its obviously vital to create proper systematic test data. This usually takes a lot of time and effort from the testing team/team-member. So, yes what I need to do is create the test data on one database(may it be SQL or Oracle) and migrate/transfer the data into the database on another server( ie. SQL to Oracle or Oracle to SQL).
So,
Are you developing a product that works against both SQL Server and Oracle and trying to synchonize development efforts?Yes, thats correct to extend, I need to test an application against both the servers, as it supports both types of databases, and try to reduce the test setup efforts (literally double the amount) that go in after manual creating same data on each type of database.
Are you trying to replicate structural changes between systems?I am not 100% sure, what you mean by this. But whats important and enough for me is to replicate the data. It would not be a lot of work to run the scripts and create empty schema objects.
Are you trying to replicate data changes between systems? The fact that you're only doing this weekly suggests that you're not working in a traditional replication environment.Yes, again as I mentioned above. It would be sufficient for me to just get a copy of the initial dataset. And then replicating changes to it would not be that important. However, if I can achieve a solution to this, I can by all means create a new database on the one server (SQL or Oracle) and take the data-set of the most recent/correct changes and replicate it on the other type of server as and when needed.
No - this is not a traditional replicating environment. I say weekly, because it is usually once in a week or forthnight that someone from the team will need to spent time to manually copy the test-data onto the another type of server in order to run the same testcases on two types of servers.
How do you handle conflicts (i.e. if I modify a row in both systems, which modification wins)? This is not really a problem in my scenario, as I only need to be able to transfer the data across to the different server and forget about the two databases actually being in-sync.
I have also, looked at DTS for a possible solution on SQL, however it seems highly un-realistic, having to map somewhere like 250 tables from the a drop-down list, only because the two database servers use different cases to represent tables internals. So, table 'Table' in my application's SQL database is called 'TABLE' is my applications Oracle database. DTS is highly inefficient in dealing with this. Also, having 250 tables move makes this a bit of a pain.
Thank you Justin for your response; I highly appreciate your inputs.
Regards, Nisarg

Differenece between oracle streams and oracle Replication

Hi all,
Can anyone tell me difference between oracle streams and oracle replication?
Regards

refer the link:Difference Between Oracle Replication & Oracle Streams.
Oracle Replication is designed to replicate exact copies of data sets to various databases. Oracle Streams is designed to propagate individual data changes to various databases. Thus, Replication is probably easier if the end goal is to maintain identical copies of data, where Streams is easier if the end goal is to allow different databases to react differently to data changes.
Oracle Replication is a significantly more mature product-- it is quite usable with older databases. Oracle Streams is a much newer technology and is only usable among different 9i databases. Most competent Oracle developers and DBA's are familiar with Oracle Replication, while many fewer have any real experience with Streams.
The Streams architecture strikes me as a lot more flexible than Oracle Replication's. This leads me to suspect that Oracle will be pushing Streams over Replication in subsequent releases, so I would expect new features in Streams, like DDL changes, that aren't in Oracle Replication. Realistically, though, I don't expect any serious movement away from Replication for at least a few releases, so I wouldn't tend to be overly concerned on this front.
answered by Justin
Distributed Database Consulting, Inc.
reference from forum thread:
Difference Between Oracle Replication & Oracle Streams.

Oracle Clustre, Oracle Cluster with RAC and Oracle 10g

Is there a difference between Oracle Cluster and Oracle Cluster with RAC? Please explain. Do existing database codes run unmodified in Cluster or Cluster with RAC environment? What needs to be modified to make existing SQL codes RAC-aware. How to achieve 'all automatic' in case of failure and resubmission of Queries from failed instance to a running instance?
In 10g environment, do we need to consider licensing of RAC as a separate product? What are additional features one derives in 10g that is not in Cluster +RAC?
Your comments and pointers to comparison study and pictorial clarification will be very helpful.

Oracle cluster like failsafe before or Veritas Cluster or other vendor's cluster is meant for HA (high availability) purpose. Which 2 nodes or more can see a shared disk with 1 active node. Whenever this active node failed through heartbeat other machine will know and will take the database over from there.
Oracle RAC is more for HA and load balance. In Oracle RAC 2 or more nodes are accessing the database at the same time so it spread load across all these nodes.
I believe Oracle 10g RAC still need seperate license for it. But you need to call Oracle or check the production document to verify it.
Oracle 10g besides improvement in RAC. It's main improvement is on the build in management of the database itself. It can monitored and selftune itself to much furthur level then before and give DBA much more information to determine the cause of the problem as well. Plus improvement on lots of utility as well like RMAN , data pump etc... I don't want to get into too much detail on this you can check on their 10g new features for more detail view.
Hope this help. :)

RAC and Oracle Sequences

We have a RAC running for two instances , we have noticed that one trigger on update which is using a sequences to get ids is not allocating such sequences
on sequence as expected , is every instance of RAC caching a set of sequences and the other instance have no idea about this , is this a configuration which has
to be done at RAC level

sayantan chakraborty wrote:
what is the difference between RAC and Oracle clusterware?RAC = Oracle Real Application Clusters
http://www.oracle.com/technology/products/database/clusterware/clusterware_for_unbreakable_linux_faq.html#
In the event of a system failure, clustering ensures high availability to users. Redundant hardware components, such as additional nodes, interconnect, and disks, allow the cluster to provide high availability. Such redundant hardware architectures avoid single points-of-failure and provide exceptional fault resilience.
In Oracle Real Application Clusters (RAC) environments, Oracle Clusterware monitors and manages Real Application Cluster databases. When a node in the cluster is started, all instances, listeners and services are automatically started. If an instance fails, the clusterware will automatically restart the instance, so that the service is often restored before the administrator notices it was down. In this sense Oracle Clusterware is the basis for Oracle Real Application Clusters.
In those environments RAC ensures the continuous operation of the database as well as its scalability by running more than one database instance simultaneously, typically one on every node in the cluster.
You cna
how to get RAC 10g?What did you mean?
If you mean Software:
http://www.oracle.com/technology/software/index.html
Docs:
http://www.oracle.com/technology/products/database/clustering/index.html
http://www.oracle.com/pls/db102/portal.portal_db?selected=16
Or Search on Google
http://www.google.co.th/search?rlz=1C1GGLS_thTH327TH327&sourceid=chrome&ie=UTF-8&q=Oracle+Real+Application+Cluster
Good Luck

What are the major differences between oracle 10g and oracle express 10g

Hi
Can anyone tell, What are the major differences between[b] oracle 10g and oracle express 10g.
Or if you know any URL, then please do let me know.
Advance Thanks
JC

Dear sir,
here it is.
http://www.oracle.com/database/product_editions.html

Is it possible to import and export dump between oracle 9 and oracle 11?

Is it possible to import and export dump between oracle 9 and oracle 11?
Source DB : Oracle 11g(unix0
Oracle client : Oracle 9(Windows)
Export import utility : Oracle 9's
Destination DB : oracle 9

I am getting the Following Error and export utility is not responding after this.
Export: Release 9.2.0.1.0 - Production on Thu Jul 15 14:37:01 2010
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
server uses AL32UTF8 character set (possible charset conversion)

Differences between Oracle BAM and Oracle BI and Question BAM Data Objects

Hi,
I have two questions.
1. Can someone tell me differences between Oracle BAM and Oracle BI?
My understanding about Oracle BAM is, we use BAM to build Dashboards or Reports.
We can also build DashBoards or reports using Oracle BI.
I am not able to understand why Oracle has two tools for same purpose?
Which tool is more powerful and user friendly(Oracle BI or Oracle BAM)?
2. Every time we plan to develop Dashboard or report in BAM, we need to create BAM ADC Data Object to store Data (i.e first step is to get data from external database or application and second step is to store data in BAM ADC data object).
My understanding is we have an extra step(i.e creating Data Object) in Oracle BAM to develop a report or DashBoard
I am wrong pl correct me?
Regards,
Shanti Nagulapalli.

Oracle 11g has many advanced features in PL/SQL over Oracle 9i.
refer here,
http://www.oracle.com/technetwork/database/features/manageability/9i-to-11g-real-world-customer-exper-133754.pdf
http://www.oracle.com/global/de/upgradecommunity/artikel/upgrade11gr2_workshop2.pdf
http://www.compuworks.com/events/view/233.pdf
http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getCourseDesc?dc=D52601GC10&p_org_id=15942&lang=US
Thanks

Difference between oracle reports and oracle report writer

I would like to know the diffrence between oracle reports and oracle report writer.I would appreciate if i get more details of oracle report writer.
Thanks
Rajesh

Hi;
May I know the difference between Oracle reports and Oracle discovererDiscoverer vs. Oracle Reports
http://businessintelligence.ittoolbox.com/documents/discoverer-vs-oracle-reports-17819
http://www.oraclechamps.com/index.php?option=com_content&view=article&id=316:oracle-reports-vs-discoverer-difference-between-oracle-reports-6i-and-oracle-discoverer&catid=62:oracle-technical-documents&Itemid=104
Discoverer Vs. Oracle Reports
PS: Be notice here is oracle database related forum side. For your future issue please use Forum Home » E-Business Suite* forum side*
Regard
Helios

Oracle RAC and Datastage

Could anyone tell me If you have some Best Practices with Oracle RAC and Datastage ETL. I am concerned about performace of ETL loads into oracle database......

http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/bus_intl.htm#sthref2435
Your answers are just a few clicks beyond the URL below.
http://tahiti.oracle.com

Diference Between Oracle ProcessConnect and Oracle Interconnect

Hello,
Does anyone knows the difference between Oracle ProcessConnect and Oracle Interconnect?
I have already read the documentation, but I didn�t understand the main difference between them�.
If somebody have experienced one of them, please tell me your opinion about these integration tools because I�m studying the possibility to user one of them in a data integration among several Oracle Databases in my company.
I will be waiting for any reply.
Bye

Check out the white paper "Getting Started with the Oracle Workflow9i/2.6.2 Business Event System and Oracle9i Advanced Queueing"
at http://otn.oracle.com/products/integration/workflow/workflow_wp_bes.pdf
This describes Workflow's integration with AQ.
Also, you could look at the "Using Workflow" chapter in the Oracle9iAS InterConnect User's Guide
at http://otn.oracle.com/docs/products/ias/doc_library/90200doc_otn/integrate.902/a92174/workflow.htm
Regards,
Clara
IS there any document containing an example of integration of Oracle Workflow with Oracle InterconnectOracle AQ ? If so, please send me the link from where I can download it.

Database replication between Oracle RAC and Oracle Standalone DB

Similar Messages

Maybe you are looking for