Active\Active vs Active\Passive

My company was recently purchased. The new company has a "policy" about any High Availability database be an Active\Active configuration. We have in the past used active\passive RAC installs with each site have multiple active RAC nodes. I am interested in see what the cases are for a true Active\Active environment where there will be multiple RAC nodes in each "cluster" and multiple databases (disk) which are actively written to, then synchronized. (As apposed to a couple mutinode RAC setups with a primary\standby database)
Any white papers or best practice document references would be great. I'd hate to do this just case of some policy.
Thanks

Be clear what the policy means. RAC is normally considered an ACTIVE/ACTIVE solution since all nodes in RAC are actively processing. In an ACTIVE/PASSIVE setup by contrast one or more nodes are actively processing whilst others are standing by ready to take over the workload in the event of failure of the primary. Physical Standby, Failsafe and non-oracle clusters are often Active/Passive. You may also check if the policy comes from a sqlserver centric view of the world where you split the sqlserver databases between different nodes, so that although for any given sql database the solution is active passive, you don't 'waste' the resources of some nodes just waiting to take over, but rather run other databases on them.
Your description of ACTIVE/ACTIVE seems to rather correspond to a Stretch Cluster http://www.oracle.com/technology/deploy/availability/pdf/1126_Ray_WP.pdf has a good overview of what this means. I'd be surprised if the policy was really to put all databases on just about the most expensive hardware and software solution available, but I'm used to surprises in the world of corporate policies.
Niall
user526463 wrote:
My company was recently purchased. The new company has a "policy" about any High Availability database be an Active\Active configuration. We have in the past used active\passive RAC installs with each site have multiple active RAC nodes. I am interested in see what the cases are for a true Active\Active environment where there will be multiple RAC nodes in each "cluster" and multiple databases (disk) which are actively written to, then synchronized. (As apposed to a couple mutinode RAC setups with a primary\standby database)
Any white papers or best practice document references would be great. I'd hate to do this just case of some policy.
Thanks

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Best,

hello
I was going through your post and i am also doing the same thing here at our organisation for Oracle 10g R2
Can you pls send me any docs u r having for configuration of Oracle in windows clusters .
And, can you pls elaborate on this point
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Error with concurrent users- Activation Passivation Bind variable ?

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See
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Hi Jcorker,
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http://technet.microsoft.com/en-us/library/cc961481.aspx
Regards,
Charlie Liao
If you have any feedback on our support, please click
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Charlie Liao
TechNet Community Support

How to : Active/Passive and Active/Active Enterprise manager R3 (10.2.0.3)

Soon I will implement the above named version of EMR3 on a AIX 5.3.3 platform. I have a couple of questions about active/passive and active/active implementations. These are the questions I have:
Basic install:
Implementing 10.2.0.2 and upgrading to 10.2.0.3 works fine on host 1234 (already done that).
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Message was edited by:
Jeroen Udo

Soon I will implement the above named version of EMR3 on a AIX 5.3.3 platform. I have a couple of questions about active/passive and active/active implementations. These are the questions I have:
Basic install:
Implementing 10.2.0.2 and upgrading to 10.2.0.3 works fine on host 1234 (already done that).
Does anyone have experience with an implementation on host 1234', in other words, a virtual host (different IP-numbers on the same ethernet adapter)?
Active/passive
Lets assume that the implementation on server 1234' works fine, how can I realise a cold failover situation? On AIX you can move/transport the volume group to the failover server, activate the volume group, mount your filesystems and the application is running again. This is the theory but ....
Active/Active
If this 'basic' install is done, can someone briefly tell me how to migrate the OMS repository to a RAC implementation? Is this possible or do I need to setup the repository for the OMS at the start of the implementation. Has anyone experience with using virtual hostnames, RAC and EMR3.
Can anyone tell me where I can find some good documentation instead of reading all these thousands of pages of Oracle's guides.
Help would be appreciated.
Message was edited by:
Jeroen Udo

Oracle 10g Database Installation In Active-Passive Mode.

Good Afternoon !!!!
We are installing Oracle 10g in Active-Passive Mode on HP UX-11.3 , with ASM. Can someone help me with step wise installation procedure for the same.
Many Thank's
Rajeev.

Check on the release notes for your platform
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Active - Passive Cluster

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All oracle binaries are on a DRBD Device on mountpoint /oradata.
This mountpoint includes the binaries and all datafiles.
I havent installed these systems. At one stage on node died and got reinstalled by a systemadministrator.
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Shortly after that the db instance dies. Alertlog is showing something like recursive sql error.
Looks like writing to the datafiles is not working.
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a) Why is it necessary to issue "localconfig add" to make the cluster starting ?
b) What could be a reason for not being able to write to the database ?
c) How would you guys install an active/passive cluster ?
c1) Install OS on both nodes
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c2.1) on both nodes in the local files system and do the mapping to the drbd afterwards?
c2.2) only on one node and just switch the mountpoint ?
Chris

Hi,
first of all please clarify, if you have Oracle clusterware installed, or just the local configuration for local ASM.
There is a big difference between the 2, and also using DRBD has nothing to do with Oracle clusterware (and is not supported by Oracle).
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Regards
Sebastian

SAP PI 7.1 High Availability, Active-Active or Active-Passive

We are planning go to HA system for PI 7.11
I've few doubts/questions regarding this.
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If it is our choice, then is at Configuration level (Application level)? or hardware level?
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What is recommended by SAP?
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Please use Active-Passive for your SAP PI 7.1 High Availability system.
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High Availability
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Best Regards
Julia

Planning System Center Operation Manager 2012 R2 on SQL 2012 Active/Passive Cluster

Dears,
I'm planning to deploy System Center Operation Manager 2012 R2 on SQL 2012 Active/Passive Cluster which have other sql instances running for other applications. And i'm planning to create a new instance for SCOM, kindly provide me recommendation
whether i can install all sql databases for SCOM on same sql instance or does it require separate instances for opsmanger database , dw database and ACS database?
Thanks in advance..

Hi,
Yes, all SCOM SQL databases can run on the same instance of SQL server.
As well, look at some helpful posts for the topic:
http://technet.microsoft.com/library/dn281933.aspx
http://blogs.technet.com/b/kevinholman/archive/2013/10/18/opsmgr-2012-r2-quickstart-deployment-guide.aspx
Natalya
### If my post helped you, please take a moment to Vote as Helpful and\or Mark as an Answer

Active-Passive Failover cluster in Windows Server 2008 R2

Hi,
As per the client requirements, I build an active-passive Oracle 11g R2 database cluster in Windows Server 2008 R2.
(Used Microsoft cluster as Client don't have Fail Safe licence)
As per the configuration, I follow the below mentioned steps:
a)OS vendor configured Active-Passive Windows Cluster
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h)Open the Windows Failover Manager to configure the Oracle Database and Listener Service in the Cluster Group
Now I am facing problem by moving Cluster Group movement. Whenever trying to moving the group, Listerner service is not getting up by Cluster Manager as quorum is not included in the group and that quorum disk is not moving in the failover node with the Oracle Cluster Group. As per my understanding Quorum having information of Cluster IP which has been configured with Listener.
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hello
I was going through your post and i am also doing the same thing here at our organisation for Oracle 10g R2
Can you pls send me any docs u r having for configuration of Oracle in windows clusters .
And, can you pls elaborate on this point
e)Create Oracle Service with the same name in the 2nd node and copy all the files like spfile,tnsnames.ora,listener.ora,password file to Node2.
Pls send me the details at [email protected] or you can contact me at 08054641476.
Thanks in advance.

Hyperion Essbase 11.1.2 active/passive Clustering

Hello,
Has anyone successfully clustered Essbase 11.1.2 in an active/passive configuration? If yes, I have a few questions as I do not believe that the documentation is very clear on a few critical areas. I have already installed and configured Essbase on the first server and set the cluster name to EssbaseCluster-1 (I also shared out the essbaseserver1 directory so the second essbase server can access it). I also went and installed and configured Essbase on the second server (during the configuration, I configured to be a member of EssbaseCluster-1. I am not sure if I am supposed to put the share location in the full arborpath location (I did not)). When configuring the opmn.xml file the documentation states the following (from http://download.oracle.com/docs/cd/E17236_01/epm.1112/epm_install.pdf pg 172):
Setting Up Active-Passive Essbase Clusters
If you set up an active-passive Essbase cluster using EPM System Configurator, you must perform
additional steps to set up Essbase failover on both nodes of the cluster.
ä To complete the setup of the Essbase active-passive cluster:
1 Update MIDDLEWARE_HOME/user_projects/epmsystem1/config/OPMN/opmn/
opmn.xml to specify the OPMN service failover network topology. In the <notificationserver
interface> section, add the <topology> section. For example:
<notification-server interface="any">
<ipaddr remote="*hostName*" />
<port local="*portNumber*" remote="*portNumber*" />
<ssl enabled="true" wallet-file="\Oracle\Middleware\user_projects
\epmsystem1\config\OPMN\opmn\wallet"/>
<topology>
<nodes list="*nodeName1:nodePort1,nodeName2:nodePort2*"/>
</topology>
</notification-server>
2 In the same section of the file, update hostName to match the nodeName for this machine.
Oracle recommends using a fully qualified name. "
So, with these instructions, I put the following into my own opmn.xml file on both of the essbase servers. (epmapp1 and epmdata1 are my two essbase servers, they are running on the default port 1423)
<notification-server interface="any">
<ipaddr remote="epmapp1"/>
<port local="*1423*" remote="*1423*"/>
<ssl enabled="false" wallet-file="E:\Oracle\Middleware\user_projects\epmsystem1\config\OPMN\opmn\wallet"/>
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</notification-server>
When I go to start the essbase cluster through the opmnctl startproc command, I recieve the following. Anyone know what I am missing?
C:\Users\Administrator>echo %ORACLE_INSTANCE%
E:\Oracle\Middleware\user_projects\epmsystem1
C:\Users\Administrator>opmnctl startproc ias-component=EssbaseCluster-1
opmnctl startproc: starting opmn managed processes...
===============================================================================
opmn id=epmapp1:1423
no processes or applications matched this request
C:\Users\Administrator>
Edited by: 789316 on Nov 4, 2010 12:00 PM

Have you been able to resolve this issue?.. I am also facing the same problem..
Thanks
Bala

Load balancing in Active-Passive architecture

1) Is it possible to have load balancing in Active-Passive architecture?
2) Pros & cons of RAC and Vertias cluster
Cheers,
Ashok Kumar C.

Note:183408.1
Note:259301.1
Please see the above notes for anwers. Hope it helps.
Though Oracle says that it does not need third party cluster software for RAC installation (Note:259301.1)
, my experience on AIX was different, without HACMP in place we could not install Oracle CRS.
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BPEL url hangs on Node2 in ACTIVE/PASSIVE setup

Hi All,
First of all, thanks in advance for your help!!!
Question:
=======
a) What are files I need to change in BPEL for ACTIVE/PASSIVE setup?
b) What are the exact entries to be changed?
Background:
=========
HOST A and HOST B connected to shared device.
Env --> Sun Solaris 10
Database repository --> HOST C and 10.2.0.3.0
BPEL hosts --> HOST A and HOST B, using BIG IP for VIP
BPEL version --> 10.1.3.1.0
1) Created BPEL repository on 10.2.0.3.0 -- Went fine
2) Install J2ee and Web Services on shared device @ HOST A -- Went fine
3) Install BPEL on shared device @HOST A--> went fine
4) Able to do opmnctl startall/stolall on HOST A
5) Able to access EM/BPELAdmin/BPELConsole on HOST A
6) Able to do opmnctl startall/stopall on HOST B
Issue
====
The url on HOST B hangs for EM and BPELConsole, however BPELAdmin workks fine.
For EM and BPELConsole it asks for usernamer and password and the next screen hangs for ever.
Question:
=======
a) What are files I need to change for ACTIVE/PASSIVE setup?
Note:
====
I read stuff in Metalink and google, however there are NO exact steps for ACTIVE/PASSIVE setup/
I changed the file jgroups-protocol.xml, but in Vain
Thanks
Regards
Natrajan

Anyone is using Active-Passive in BPEL environment??

SQL server 2012 active\passive or active\active cluster

Hi all,
I will two SQL 2012 servers in a cluster, what will be the best mode: active\passive or active\active knowing that will have one clustered instance. When we use active\passive and when to use active\active? Do we use active\active if we have multiple clustered
sql instances only?
Note: the two-node sql cluster will be installed on Hyper-V 2012 R2 cluster

Download this Microsoft whitepaper about Windows 2008 R2 Failover cluster. Here's an excerpt:
Active/Active failover cluster model. All nodes in the failover cluster are functioning and serving clients. If a node fails, the
resource will move to another node and continue to function normally, assuming that the new server has enough capacity to handle the additional workload.
Active/Passive failover cluster model. One node in the failover cluster typically sits idle until a failover occurs. After a failover,
this passive node becomes active and provides services to clients. Because it was passive, it presumably has enough capacity to serve the failed-over application without performance degradation.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB4QFjAA&url=http%3A%2F%2Fdownload.microsoft.com%2Fdownload%2FF%2F2%2F1%2FF2146213-4AC0-4C50-B69A-12428FF0B077%2FWS08%2520R2%2520Failover%2520Clustering%2520White%2520Paper.doc&ei=9OzIVL-IMcPjoASv9oDICQ&usg=AFQjCNG7uT9nBQhX2P7wOJiIfzajXKttzg&bvm=bv.84607526,d.cGU
Satish Kartan www.sqlfood.com

Active\Active vs Active\Passive

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