GG with RAC - failover

11.1.1 GG on Oracle 11gR2 - Source is single instance - Target is two node RAC .
We are planning to have HA for the GG process - If one node goes down we have to start processing from the second Node. - We are planning to have a shared file system for GG software - which will have all the metadata required shared across nodes - Can we use the RAC virtual IP for the pump process to ship the trail files - If one node goes down VIP fails over to the other node and we will have the trail files over there - Is it a supported config ? Can you share some metalink notes for configuring GG on RAC Target -
Thanks

Hi,
Please refer to the Oracle White Paper—Oracle GoldenGate high availability with Oracle Clusterware
for more information on configuring OGG with RAC & clusterware.
http://www.oracle.com/technetwork/middleware/goldengate/overview/ha-goldengate-whitepaper-128197.pdf
Thanks & Regards
SK

Similar Messages

R12 with RAC - Failover

Hi,
Is it possible to have r12 Single Application tier with two node RAC database tier ?
Suppose if i have a 2 node rac and Node1 goes down, which of the following application services can fail over ( or say connect ) to second node.
1. self service application
2. Forms applicaton ?
3. CM
Can this happend dynamically or do i need to restart the application services ?
Is it manadatory to have multiple applications node if we have RAC at the backend ?

Hi,
You can implement RAC with single application tier node.
It is not mandatory to have multiple application nodes with RAC, but it is recommended (in terms of performance and availability).
I believe all your questions are answered in the following document.
Note: 388577.1 - Using Oracle 10g Release 2 Real Application Clusters and Automatic Storage Management with Oracle E-Business Suite Release 12
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=388577.1
Regards,
Hussein

Problems with RAC and XA: Fallback

Hello,
we are seing problems with RAC and XA (Tuxedo 11, DB 11.2), specifically encountering "ORA-24798: cannot resume the distributed transaction branch on another instance".
The first scenario relates to fallback after a RAC node failure. There are two servers, S1 and S2. S1 makes an ATMI call to S2. Both servers are in the same Tuxedo group, using TMS_ORA. RAC is set up for failover (BASIC), no load balancing.
The sequence is:
- S1 and S2 are connected to the same RAC node n1. All is well.
- RAC node n1 fails. S1, S2 and the TMS_ORA all fail over to RAC node n2. After the failover has happened, all is well.
- RAC node n1 recovers. All is still well (as there is no automatic fallback).
- S1 (or S2) is restarted (either intentionally or because of a crash). Since n1 is up again, S1 connects to n1. Now we get ORA-24798. Permanently.
S1 is connected to n1 and S2 is connected to n2. Since both are in the same group, both use the same XA transaction branch. When called, S2 attempts to JOIN the transaction branch that S1 started. But the DB (11.2) does not allow the same branch to span more than one node. Hence the ORA-24798.
This seems to be a severe limitation in the combination of Tuxedo, XA and RAC. It basically means we still have to use DTP services, even with Tuxedo 11 and DB 11.2. Or are we missing something?
We could put S1 and S2 into different groups, but that seems to be inefficient, and not practical for a real application (10s of servers).
I am extrapolating from this that RAC load balancing would also not work, as S1 and S2 could be connected to different RAC nodes.
Roger

Roger,
When using an external transaction manager such as Tuxedo you should still declare Oracle services as DTP services when using Oracle Database 11g. The Tuxedo documentation is not clear about this. The relevant 11gR2 RAC documentation is at http://download.oracle.com/docs/cd/E11882_01/rac.112/e16795/hafeats.htm and states
"An XA transaction can span Oracle RAC instances by default, allowing any application that uses the Oracle XA library to take full advantage of the Oracle RAC environment to enhance the availability and scalability of the application.
"GTXn background processes support global (XA) transactions in an Oracle RAC environment. The GLOBAL_TXN_PROCESSES initialization parameter, which is set to 1 by default, specifies the initial number of GTXn background processes for each Oracle RAC instance. Use the default value for this parameter clusterwide to allow distributed transactions to span multiple Oracle RAC instances. Using the default value allows the units of work performed across these Oracle RAC instances to share resources and act as a single transaction (that is, the units of work are tightly coupled). It also allows 2PC requests to be sent to any node in the cluster.
"Before Release 11.1, the way to achieve tight coupling in Oracle RAC was to use Distributed Transaction Processing (DTP) services, that is, services whose cardinality (one) ensured that all tightly-coupled branches landed on the same instance—regardless of whether load balancing was enabled. Tightly coupled XA transactions no longer require the special type of singleton services to be deployed on Oracle RAC databases if the XA application does not join or resume XA transaction branches. XA transactions are transparently supported on Oracle RAC databases with any type of service configuration.
A"n external transaction manager, such as Oracle Services for Microsoft Transaction Server (OraMTS), coordinates DTP/XA transactions. However, an internal Oracle transaction manager coordinates distributed SQL transactions. Both DTP/XA and distributed SQL transactions must use the DTP service in Oracle RAC."
This issue came up earlier this year in another newsgroup thread at https://forums.oracle.com/forums/thread.jspa?threadID=2165803
Regards,
Ed

Do I need to change OCI layer to utilize Oracle RAC failover Feature?

Dear Oracle Experts,
From the Oracle documents, the RAC is a great feature providing the scalability and high availablility. I thought the failover features should be transparent to users.
However, from this book:
http://www.oreilly.com/catalog/oressentials2/chapter/ch01.html
"For instance, in high-availability implementations in which multiple systems share disks and implement Real Application Clusters/Oracle Parallel Server, you may want users to reattach to a second server transparently if the first fails. You can write programs that do this using OCI. "
"You can write applications with the Oracle Call Interface (OCI) to provide failover to a second instance transparently to the user. "
I am confused if RAC failover feature have to depend on OCI user application coding?
I have an application developed over Oracle 8.1.6, if I buy Oracle9i to use RAC failover feature, should I modify my application at OCI layer to make it work? Can I switch the oracle instance when the original one fails only by RAC setup instead of changing OCI code?
Thanks.
Wei
P.S. I am running application over Compaq tru64 5.1A.

Hi ,
As answered by Sumit u need not alter ur application for shifting it to RAC.But there are few things which will determine the perfoemance of your application on RAC and depend on the type of application u use .Application partioning,data partitioning,index partitioning ... look for these topics . This may help.
The other thing u mentioned abt. Oracle Libraries,DB name,SID .. . Now when u'll have RAC there will be more than 1 Node I believe. So each Node will have its SID,Oracle Binaries but DB name will be same.
Gud Luck!
Vijay Shanker
Edited by: Vijay Shanker on Feb 14, 2009 6:12 PM

Handling Oracle RAC Failover at the application layer

Hi All,
I am currently researching best practices for handling oracle RAC failover at the application layer since transactional statements (INSERT,UPDATE and DELETE) are not handled transparently. So I have few questions for the community:
1. In case of a node failure would I need to roll back all of transactional statements that are part of the transaction or would I have to re-execute the one that failed only?
2. Does things change with XA 2 phase commit transactions?
Any input and/or architecture suggestions would be much appreciated.
Regards,
Dmitriy Frolov

Hi,
the Oracle RAC stack works very vell on its own, without the need of a third party clusterware. It will be aware of failures on the nodes.
Database will be using ASM or RAW or NFS devices for Shared storage.
Oracle Clusterware can also be configured to monitor your applications and to a failover to other nodes.
However if you need a shared filesystem for your own applications, then you will have to use QFS or similar (which again than requires Sun Cluster).
See: http://www.oracle.com/technology/products/database/clusterware/index.html
Regards
Sebastian

Optimize rac failover time?

I have 2node RAC and the failover time is taking 4 minutes. Please advice some tips/documents/links that shows, how to optimize the rac failover time?
[email protected]

Hi
Could you provide some more information of what it is you are trying to achieve. I assume you are talking about a the time it takes for clients to start connecting to the available instance on the second node, could you clarify this?
There is SQLnet parameters that can be set, you can also make shadow connections with the preconnect parameter in your fail_over section of your tnsnames.ora on the clients.
Have you set both of your hosts as preferred in the service configuration on the RAC cluster. The impact will be less in a failure as approximately half of your connections will be unaffeced when an instance fails.
Cheers
Peter

How to Configure a oracle R12 with RAC on two different system .

I have one laptop and one desktop
Laptop----
on laptop I have install vmware 8
Host OS --win7
Guest OS---linux 4
Desktop ---
On Desktop I have install Vmware 8
Hosts OS --- Win XP
Guest OS ---Linux 4
Plz suggest How configure oracle R12 with RAC using both system .

Hussein Sawwan wrote:
on laptop I have install vmware 8
Host OS --win7
Guest OS---linux 4
Desktop ---
On Desktop I have install Vmware 8
Hosts OS --- Win XP
Guest OS ---Linux 4
Plz suggest How configure oracle R12 with RAC using both system .If you want to configure RAC, then you must have the same OS installed on all RAC nodes -- See (RAC: Frequently Asked Questions [ID 220970.1], Does Oracle Clusterware or Oracle Real Application Clusters support heterogeneous platforms?) for details.
Once you have the same OS, please refer to:
Oracle E-Business Suite Release 12 High Availability Documentation Roadmap [ID 1072636.1]
Using Oracle 10g Release 2 Real Application Clusters and Automatic Storage Management with Oracle E-Business Suite Release 12 [ID 388577.1]
Using Oracle 11g Release 2 Real Application Clusters with Oracle E-Business Suite Release 12 [ID 823587.1]
Thanks,
HusseinHi Hussein,
For Rac I am using both same OS (linux 4) for both nodes .
Plz suggest its possible to install two nodes on different machine(diiferent virtual machine on different system ) .Can communicate both machine without any problem if its possible plz provide links.

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. :)

Windows Server 2012: SMB share with transparent failover

Have a nice day to all!
I have 2 HP Proliant DL380P Gen8 servers containing 8 x 1TB disks (with P420i HP Smart Array RAID Controller) in each server.
So, there are 2 arrays on every server:
1. 2 x 1TB in RAID1 (+1 disk for hot swap) - system volume
2. 5 x 1TB in RAID5 (+1 disk for hot swap) - data volume
And I installed Windows Server 2012 Standard on each server.
Than I created a failover two-nodes cluster.
And now I want to create a SMB share with transparent failover for all the second (data) volume (it's about 3.3TB in RAID5 array). How just can I reach this goal? I'm going to use it in future for Hyper-V VMs, so, the main reqirement is powered-on and working
VMs even if one node of SMB share cluster is failed.
I wasn't able to see my volumes in failover cluster manager. I tried to create iSCSI targets, storage pools, virtual disks, etc. but no luck. My failover cluster manager can't see it to create SMB share!
Can anyone advice me something?
Thanks in advance!

Have a nice day to all!
I have 2 HP Proliant DL380P Gen8 servers containing 8 x 1TB disks (with P420i HP Smart Array RAID Controller) in each server.
So, there are 2 arrays on every server:
1. 2 x 1TB in RAID1 (+1 disk for hot swap) - system volume
2. 5 x 1TB in RAID5 (+1 disk for hot swap) - data volume
And I installed Windows Server 2012 Standard on each server.
Than I created a failover two-nodes cluster.
And now I want to create a SMB share with transparent failover for all the second (data) volume (it's about 3.3TB in RAID5 array). How just can I reach this goal? I'm going to use it in future for Hyper-V VMs, so, the main reqirement is powered-on and working
VMs even if one node of SMB share cluster is failed.
I wasn't able to see my volumes in failover cluster manager. I tried to create iSCSI targets, storage pools, virtual disks, etc. but no luck. My failover cluster manager can't see it to create SMB share!
Can anyone advice me something?
Thanks in advance!
You need to have your storage you want to export as being a shared storage visible to your cluster (part of CSV). Then you'll configure failover file shares using content accessible from both cluster nodes. Refer to this manual for diagrams (ignore StarWind
and replace it logically with your existing shared storage you've used to create your cluster):
http://www.starwindsoftware.com/configuring-ha-file-server-on-windows-server-2012-for-smb-nas
Also see these manuals from MS on how to create failover file server:
http://technet.microsoft.com/en-us/library/cc753969.aspx
http://technet.microsoft.com/en-us/library/cc731844(v=ws.10).aspx
http://blogs.technet.com/b/askcore/archive/2010/08/19/working-with-file-shares-in-windows-server-2008-r2-failover-clusters.aspx
However if you want to use existing storage located on the both nodes you're out of luck. Microsoft does not provide anything representing local DAS to the cluster nodes. If you want to use existing DAS then you'll have to stick with a third-party product
like StarWind, SteelEye or DataCore. To create something like in this picture:
So you'll have a configuration with only two nodes, no physical shared hardware (SAS JBOD, FC or iSCSI) and vSAN. Refer to this manual:
http://www.starwindsoftware.com/ns-configuring-ha-file-server-for-smb-nas
Hope this helped :)
StarWind iSCSI SAN & NAS

Problems with RAC installation with Windows 2000 Advanced Server

Hello,
I've two servers in cluster mode with W2K Advanced Server, and a RAID-5 array of 4 disks shared by both of them. My problem is that I've installed The Cluster Service of Windows in order to have an active/passive configuration of my servers, because I have a common directory structure that is accessed by the PC's of the LAN.
By another hand, I want to install Oracle Real Application Cluster to manage my Oracle database but after create the extended partition and the logical drives when I execute the file \preinstallation_rac\clustersetup\clustersetup.exe to create the cluster, when I select the option Create a cluster the following error message appears me:
"Any disk Oracle partition has been found. Stop this wizard, create an Oracle partition and try it
again."
I'd like to know if it's possible to have the Service Cluster of Windows 2k and the Oracle clusterware?¿ Altough before begining the installation I've stopped my Cluster Service as documentation suggests. If somebody knows what it's happening to me I'd be really very grateful.
Thanks in advance,
Isabel

Hello Joel,
I've already read all documentation provided by Oracle about Real Application Clusters
and I've not found anything to solve my problem. Certainly I want to use OCFS but when I
try to execute preinstall_rac\clustersetup.exe to install CFS the error appear and I can't
continue with RAC installation.
Besides I've tried command "lsnodes -v" and got :
Could not load CM.dll
Could not initialize cluster
And when I've tried to run "clustercheck" I've got :
** Copy File: Create Directory failed - Error 183
** Directory = \\192.168.1.111\Cy$\Temp\opsm
Created directory \\192.168.1.112\Cy$\Temp\opsm
Could not copy file to other nodes [error = 183]
I've read metalink Note 186130.1 Clustercheck Fails with Windows Error 183 and the only
proof I haven't done is get the clustercheck.exe release1(9.0.1).
Any suggestion will be very appreciated.Thanks,
Isabel

How to install ebs r12.1 with rac

Hi Team,
Anyone can help me how to do fresh installation of oracle apps r12 with rac database on linux.I have done oracle apps installation with single database.Can anyone can provide me the step by step (or) documents.Please help me out.

user10721329 wrote:
Hi Team,
Anyone can help me how to do fresh installation of oracle apps r12 with rac database on linux.I have done oracle apps installation with single database.Can anyone can provide me the step by step (or) documents.Please help me out.You can't do a fresh installation of 12.1.1 with RAC database and you will need to install R12 with single instance then convert to RAC.
Using Oracle 11g Release 2 Real Application Clusters with Oracle E-Business Suite Release 12 [ID 823587.1]
Using Oracle 11g Release 1 (11.1.0.7) Real Application Clusters and Automatic Storage Management with Oracle E-Business Suite Release 12 [ID 466649.1]
Oracle E-Business Suite Release 12 High Availability Documentation Roadmap [ID 1072636.1]
Thanks,
Hussein

Configure SOA/BAM with RAC database

Hi,
We've configured SOA Cluster 11.1.1.3 with RAC database 11.1.7. For thiis we've create RAC multi datasources and the JDBC details of these datasources are as under:
Datasource name: SOA-RAC-1
=====================
jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=host-1-vip.domain.com)(PORT=15715)))(CONNECT_DATA=(SERVICE_NAME=SID.DOMAIN.COM)(INSTANCE_NAME=SID1)))
Datasource Name: SOA-RAC-2
jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=host-2-vip.domain.com)(PORT=15715)))(CONNECT_DATA=(SERVICE_NAME=SID.DOMAIN.COM)(INSTANCE_NAME=SID2)))
Multi Datasource=rac1 & rac-2
Everything is up and running, but when we are testing it by stopping one of the ndoe fo RAC (Say Node-1) and starting the managed server we are getting following error:
<Nov 15, 2010 2:22:05 AM CST> <Error> <Deployer> <BEA-149205> <Failed to initialize the application 'leasing-rac0-jdbc' due to error weblogic.application.ModuleException: .
weblogic.application.ModuleException:
at weblogic.jdbc.module.JDBCModule.prepare(JDBCModule.java:290)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:508)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:41)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:149)
Truncated. see log file for complete stacktrace
===========================================
<Nov 15, 2010 2:22:31 AM CST> <Warning> <JDBC> <BEA-001129> <Received exception while creating connection for pool "OraSDPMDataSource-rac0": Listener refused the connection with the following error:
ORA-12521, TNS:listener does not currently know of instance requested in connect descriptor
>
<Nov 15, 2010 2:22:33 AM CST> <Warning> <JDBC> <BEA-001129> <Received exception while creating connection for pool "BAMDataSource-rac0": Listener refused the connection with the following error:
ORA-12521, TNS:listener does not currently know of instance requested in connect descriptor
>
<Nov 15, 2010 2:22:36 AM CST> <Warning> <JDBC> <BEA-001129> <Received exception while creating connection for pool "BAMDataSource-rac0": Listener refused the connection with the following error:
ORA-12521, TNS:listener does not currently know of instance requested in connect descriptor
>
<Nov 15, 2010 2:22:36 AM CST> <Warning> <JDBC> <BEA-001129> <Received exception while creating connection for pool "OraSDPMDataSource-rac0": Listener refused the connection with the following error:
ORA-12521, TNS:listener does not currently know of instance requested in connect descriptor
>
<Nov 15, 2010 2:22:37 AM CST> <Warning> <JNDI> <BEA-050007> <An attempt was made to look up non-versioned global resource "topic.oracle.bam.messaging" from an application version "oracle-bam [Version=11.1.1]". This can potentially cause conflict of the global resource usages among multiple application versions.>
<Nov 15, 2010 2:22:38 AM CST> <Notice> <Log Management> <BEA-170027> <The Server has established connection with the Domain level Diagnostic Service successfully.>
<Nov 15, 2010 2:22:38 AM CST> <Warning> <JDBC> <BEA-001129> <Received exception while creating connection for pool "mds-owsm-rac0": Listener refused the connection with the following error:
ORA-12521, TNS:listener does not currently know of instance requested in connect descriptor
>
And managed server goes to admin mode. Its with both SOA and BAM servers.
Please let me know if someone has come across this error or is there anything I am missing while configuring the multi datasource.
Thanks,
Suraj Sharma

Hi Suraj,
even i am facing the same issue, were you able to resolve this issue?
Thanks,
Deepa

Fresh Instalation of Oracle E-bussiness suite with RAC database

Hi,
Could you pls give me a high level overview steps for Fresh Installation of E-Bussines suite 11i/R12 with RAC database?
Thanks
John

RapidWiz does not have the feature of installing Oracle Apps 11i/R12 with RAC. Refer to the following links for more details about the installation steps.
11i (11.5.10.2+ virtual) Documentation Library
http://download-uk.oracle.com/docs/cd/B25516_14/current/html/docset.html
Release 12.0.4 Documentation Library
http://download.oracle.com/docs/cd/B40089_09/current/html/docset.html
For RAC configuration, depending on your application/database version, please refer to the following note (All relevant notes/documents for configuring 11i/R12 with 9i/10g/11g RAC database are listed in this note):
Note: 745759.1 - Oracle E-Business Suite and Oracle Real Application Clusters Documentation Roadmap
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=745759.1

Toplink support for RAC Failover

We need to enable Toplink to support RAC Fast Connection Failover. We need to support
only read query retry functionality and not write query retry. We found one document
(http://www.oracle.com/technology/events/develop2007/presentations/oracle_jdbc_high_availability_load_balancing_best_practices_and_road_map.pdf)
that explains how to configure JDBC connection for RAC failover. However, since we
are using Toplink, we don't explicitly write our own jdbc url and toplink's session/uow
will automatically handle the actual sql query execution.
Is there any way we can configure Toplink to support RAC Fast Connection Failover, such
as possibly in the toplink's sessions.xml or in the oc4j container's connection pools setting?
Just for information, the way we acquire Toplink session is through SessionFactory:
   SessionFactory sessionFactory = new SessionFactory("repository",
                                 "META-INF/repository-sessions.xml");
   Session toplinkSession = sessionFactory.acquireSession();Then we do queries, acquiring unit of work, etc, using that toplinkSession.
Thanks.

We have enhanced our RAC FCF support in 11gR1 leveraging the new Universal Connection Pool to make it more seamless to the application. Which version of TopLink and OC4J are you using?
Doug

PRD with RAC and DR with non-rac datagaurd

Is it possible to implement production with RAC database and DR with non-rac datagaurd.
if yes, how does the log shipping happening from different nodes of RAC to one DR node?
Can anybody answer please?
Thanks
Vignesh.

There is also a very good MAA whitepaper on this szenario:
MAA 10g Setup Guide: Creating a Single Instance Physical Standby Database for a RAC Primary Database
http://www.oracle.com/technology/deploy/availability/pdf/MAA_WP_10g_RACPrimarySingleInstancePhysicalStandby.pdf

GG with RAC - failover

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