Active active cluster

Dear all,
I'm trying to figure out without any success in the official documentation wether SQL Server 2012/2014 supports active-active clustering or not.
I mean by active-active clustering having two RDBMS accessing the same database in a read-write fashion at the same time (like an Oracle RAC).
Do you have any clues concerning this question ? Any pointer to an official documentation saying something like: "yes, you can make load balancing in front of an SQL server cluster" (or the negation ;) )
Thank you,
Laurent

I'm trying to figure out without any success in the official documentation wether SQL Server 2012/2014 supports active-active clustering or not.
Hi,
Let me first tell you there is nothing like Active active cluster correct word is Multi instance cluster. Multi instance cluster is fully supported in SQL Server.
I mean by active-active clustering having two RDBMS accessing the same database in a read-write fashion at the same time (like an Oracle RAC).
No multi instance cluster would be two or more applications accessing different instances of SQL server whih are residing on different or same nodes. Generally its different nodes. Oracle RAC is different from SQL Server clustering please dont mix both
to an official documentation saying something like: "yes, you can make load balancing in front of an SQL server cluster" (or the negation ;) )
Load balancing is Application concept and SQL Server Clustering is totally different from it. As a fact SQL Server clustering does not provides load balancing it provides redundancy. Installing multi instance cluster is same as Active passive cluster you
just need to install two instances with both instances on different node.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Articles

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Unable to failover the services in active-active cluster node

Hi,
i am applying the sp2 patch for sql server 2008 r2 in active-active cluster, we have 3 services in the cluster , node 1 as 2 prefered owner and node 2 as 1 prefered owner, when i try to move the service from node 2 to node1 , i am getting the below errors
DCOM was unable to communicate with the computer XXXXXXXXX using any of the configured protocols.
The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server XXXXXXXXX. The target name used was RPCSS/XXXXXX. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal
name (SPN) is registered on an account other than the account the target service is using. Please ensure that the target SPN is registered on, and only registered on, the account used by the server. This error can also happen when the target service is using
a different password for the target service account than what the Kerberos Key Distribution Center (KDC) has for the target service account. Please ensure that the service on the server and the KDC are both updated to use the current password. If the server
name is not fully qualified, and the target domain (XXXXXX) is different from the client domain (XXXXXXX), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server.
The Cluster service failed to bring clustered service or application 'CHCROCHC045' completely online or offline. One or more resources may be in a failed state. This may impact the availability of the clustered service or application.
Cluster resource 'SQL Server (CHCROCHC045)' in clustered service or application 'CHCROCHC045' failed.
any inputs appreciated to resolve this issue as i could not procedd with patching
BR
PGR

Hi PGR,
As the issue is more related to Windows Server, I would like to recommend you post the issue in the
Windows Server forums for better support.
In addition, below are some article about troubleshooting error ” DCOM was unable to communicate with the computer XXXXXXXXX using any of the configured protocols” for your reference.
Event ID 10009 — COM Remote Service Availability
How to troubleshoot DCOM 10009 error logged in system event?
Thanks,
Lydia Zhang
Lydia Zhang
TechNet Community Support

How can we achive active/active cluster setup with Oracle

Hi Experts,
How can we achieve active/active database setup with oracle WITHOUT USING RAC.. As far as I know it's impossible (unless I'm wrong)..
We are using Oracle 11.2.0.1 64bit on Windows 2008 server. We deployed Oracle FailSafe but that's more of an active/passive solution based on a windows cluster.
The other solution we were thinking about is to use DataGuard and replication.. two servers.. the oracle instance running on one server generating logs, and the other server receive the logs and apply them to the physical standby db.. Still, this is not a real active/active setup.
So, is it possible to run 2 servers in an active/active cluster and have the oracle database in an active/active setup or have the instance running on multiple nodes (at the same time)?
Thanks

Let me give you a brief explanation of what the situation is and you can be the judge..
My client have four databases with the smallest one being 20GB and the biggest around the 35gb (SGA 750mb to 1.4gb (Tiny by DB standards) and probably on a normal day, you can run all four of them on a decent desktop).. The DBs are used to keep track of people information. Through out the year, the databases are almost sitting idle, and by idle I mean, the odd update here and there, the odd report..etc. No hard real processing of any sort. Two days of the year (end of year) we have all the operators consolidating records and what's not and they will be pounding away entering data and updating the tables - with hourly reports that goes to 3rd parties. The client expects a 99.99 up time and availability during those 2 days.
Now, tell me, How can I justify using RAC and spending hundreds of thousands of dollars in licensing and what ever extra costs introduced by the complexity of the environment for the above scenario knowing that I don't have any real use for RAC for 363 days of the year; and we MIGHT need it for 2 days of the year? This is the dilemma we're facing.
Thanks
Edited by: rsar001 on Sep 3, 2010 9:42 AM

FTP Adapter duplicate processing of files in Active-Active cluster env

Hi All,
We have single active-active cluster environment and we have configured all the HA configurations for Inbound and Outbound operations (except outboundDatasourceLocal). But we faced a situation that the FTP Adapter processed a file twice. This happened when there was a fail-over in oracle database in where SOA-INFRA schema is created.
Please let me know if anyone faced similar issue and what would be the resolution for this duplication issue.
Thanks in Advance.

Hi Vernetto,
Thanks for your reply.
I too had opened a ticket with oracle and they are looking into the issue.
can you please let me know what are the inbound and outbound operation configurations you have specified in the 'outbound connection pools'. Also is there any other specific property you set in jca file?
one more thing is, we have configured outboundLockTypeForWrite to 'oracle' as we are using the oracle database. but i couldnt see any data in FILEADAPTER_IN or in FILEADAPTER_MUTEX tables. you said you could see data in FILEADAPTER_IN table. so is there any specific property requires to be set which i am missing?
please suggest.
Thanks.

Active - Passive Cluster

Hey, I have to manage an active passive cluster on SLES10 SP4. Oracle 10.2.0.4
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.
After a switch from the running node to the standby node, the cluster is not starting.
Jan 3 14:36:01 a logger: Cluster Ready Services waiting on dependencies. Diagnostics in /tmp/crsctl.6114.
Jan 3 14:36:14 a logger: Waiting for Oracle CSS service to be available before starting
Jan 3 14:36:14 a logger: ASM instance +ASM. Wait 2.
After issung $ORACLE_HOME/bin/localconfig add the cluster is starting, the asm instance is coming up, and also the database instance is starting.
Shortly after that the db instance dies. Alertlog is showing something like recursive sql error.
Looks like writing to the datafiles is not working.
In asmcmd the diskgroups are showing DISMOUNTED (show MOUNTED before)
so what to do ?
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
c2) Install oracle binaries
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).
a.) Localconfig may be necessary for a local ASM installation in 10.2. Main reason is, that the CSS service configuraton includes the hostname (which changed if you switched nodes). Hence may not be able to start ASM. With localconfig you are fixing this issue.
Very important: It is not a good idea to run this is a cluster configuration, since it will break things (a lot of things).
b.) If the ASM diskgroup got dismouned, then the database cannot write. Hence your problem. Why the diskgroup dismounted, you should find in the ASM alert.log
c.) I would go for RAC One Node. Which has this all preconfigured. So it makes life easier. Search for "RAC One Node" on OTN for more information. At least I would take a manual cluster, and do mirroring by ASM, and not DRBD....
c1.) Yes install Oracle cluster (or Grid infrastucture in 11.2) on both nodes. Like a RAC.
c2) Install database software on both nodes locally.
c2.1) No. No DRDB.
c2.2) Both nodes. Same installation.
Regards
Sebastian

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

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

Duplicate Instances are coming on Active- Active Cluster

Hi,
I am using FileAdapter on a shared drive in Active-Active cluster.
I have done all Oracle Recommended settings(e.g. eis/HAFileAdapter).
Also I would just like to mention that , I have not used below property for my Active Active cluster.
"<property name="singleton">true</property>"
I am getting a strange issue of duplicate processing of same file.
Some times I can see 2-3 instances with the same details and some time it will work normally and I will see only one instance.
I am not able to find out the reason for that.
Any pointers are suggestions would be appreciated ?
Thanks,
Ashu

You have to have ClusterGroupId to make one node active and another inactive in composite.xml file.
<activationAgents>
<activationAgent className="oracle.tip.adapter.fw.agent.jca.JCAActivationAgent" partnerLink="ReadFileContent">
<property name="portType">Read_ptt</property>
*<property name="clusterGroupId">ReadFileCluster</property>* </activationAgent>
</activationAgents>
Thanks,
Vijay

Active-Active cluster, duplicate instances?

Hi,
We have a active-active cluster and we get all instances as double amount. All adapter db, ftp etc. Like we read file using ftp-adapter and it creates two instances from one file? What is problem in our environment?

add signletone property for the services(ftp adapter in composite.xml)
<property name ="singleton">true</property>
e.g.
<service name="WSS" ui:wsdlLocation="WSS.wsdl">
<interface.wsdl interface="http://xmlns.oracle.com/pcbpel/adapter/ftp/Application2/XX_GLMaintain/WSS#wsdl.interface(Get_ptt)"/>
<binding.jca config="WSS_ftp.jca"/>
<property name ="singleton">true</property>
</service>
and also
<property name="activationAgent.WSS_SAP.className" type="xs:string"
many="false">oracle.tip.adapter.fw.agent.jca.JCAActivationAgent</property>
<property name="activationAgent.WSS_SAP.portType" type="xs:string"
many="false">Get_ptt</property>
e.g.
<component name="XX_GLMaintain">
<implementation.bpel src="XX_GLMaintain.bpel"/>
<property name="activationAgent.WSS_SAP.className" type="xs:string"
many="false">oracle.tip.adapter.fw.agent.jca.JCAActivationAgent</property>
<property name="activationAgent.WSS_SAP.portType" type="xs:string"
many="false">Get_ptt</property>
</component>

Drop Database in Active/Passive Cluster

Hi,
database is 10.2.0.4 on RHEL AS 4. Database is using ASM for the storage of physical files. This database is part of Active Passive cluster.
Can you please guide me as how can I drop this database and also remove the entry from cluster.
Thanks

Panicked DBA wrote:
Hi,
database is 10.2.0.4 on RHEL AS 4. Database is using ASM for the storage of physical files. This database is part of Active Passive cluster.
Can you please guide me as how can I drop this database and also remove the entry from cluster.
For dropping the database, using the DBCA is the best approach. After the removal, use the command srvctl to remove the entries from the OCR.
HTH
Aman....

[b]Managing Active/Passive Cluster.[/b]

Hi,
We are having active passive cluster
environment and we are running webMethods on
it.
The problem we are having is whenever we do
any changes we need to do a failover and then
do the same task on the passive one as well.
Can anybody help how to make this thing
automatic so that we deploy any package/fixes
on webmethods and should get replicated on
the passive one.
Thanks,
Amit.

If you are manipulating data-files, that do not affect the Application (in this case webmethods) then simply use the cluster console, which allows you to perform updates on multiple hosts at the same time.
Alternatively if you are making changes to the application itself then, does the application management software ( I am not that familier with webmethods) not allow you to distribute changes across an application domain, ie. using the application tools and not the underlying cluster framework.

Oracle Active / Passive Cluster Installation

Hi everybody,
I have searched a lot about installation of Active / Passive Cluster installation in Oracle on Linux, neverthless nowehere I found it.
Can anyone help me to install it or send me any documentation about it from start to end.

Hi,
if you are talking to a High Availability feature in OAS 11g then check the following document.
Reference
http://www.oracle.com/technetwork/database/features/availability/maa-edg-frd-129690.pdf
Regards Roberto

Veritas Active/Passive cluster knowledge

Hi All,
Does anyone have any experience of Veritas Active/Passive cluster skills that they could share with me.
rgds
alan
Message was edited by:
alanm

Veritas active/passive cluster is very easy to use. I am not sure about linux but I guess even for linux there are having gui interface which is very user friendly. Its like cluster will use common storage and one node will be configured as active other as passive in case any failure occurs at node1 automaticly node2 will become active.

MSSQL2012 active/passive cluster convert to active/active cluster

Good day.
We have 2-node active/passive MSSQL2012 cluster (on Win 2008 R2). One "default" instance.
We want convert to active-active, (multi-instance).
As I understand, one SQL instance (existing) will run on 1 cluster node and the second (new) instance on the 2 cluster node.
I have some questions:
- we have cluster virtual name and ip address for existing MSSQL instance, for the second MSSQL instance we need to create another name and ip ?
- for second MSSQL instance we can create 2 separate cluster disks (for DB and LOGS) ?
- for second MSSQL instance we can create another DTC instance and bind it to the second MSSQL instance ?
- we can use existing physical LAN connectors on our servers (data and heartbeat) or we need to add new LAN adaptors ?
- quorum disk is the same for all instances ?
Sorry for my bad English.

I have some questions:
- we have cluster virtual name and ip address for existing MSSQL instance, for the second MSSQL instance we need to create another name and ip ?
Yes that would be required.
- for second MSSQL instance we can create 2 separate cluster disks (for DB and LOGS) ?
Yes it will be in different resource group and you can have different disk for them.
- for second MSSQL instance we can create another DTC instance and bind it to the second MSSQL instance ?
Same MSDTC can be used for multiple instance.
http://blogs.technet.com/b/askcore/archive/2009/02/18/how-to-configure-multiple-instances-of-distributed-transaction-coordinator-dtc-on-a-windows-server-failover-cluster-2008.aspx
- we can use existing physical LAN connectors on our servers (data and heartbeat) or we need to add new LAN adaptors ?
Best to ask network team
- quorum disk is the same for all instances ?
Quorum is for windows cluster not for SQL server so Yes its same for all instances
Sorry for my bad English.
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

LiveCache on Cluster Active/Active

Hi SAP gurus...
is it possible to install liveCache on an Active/Active Cluster (MSCS)?
is there any SAP note or Microsoft document available with instructions?
thanks
Antonio

Hi António,
it depends on how you define the ACTIVE/ACTIVE cluster.
If you want to have the SCM system on one node and the liveCache on the other - this should work, yes.
If you mean something like Oracle RAC where the liveCache is running on both nodes in parallel - no, there's no way to do that.
For installation instructions, simply check the notes that you get by searching for "livecache + mscs":
780759     liveCache 7.5: MSCS Installation
782616     liveCache 7.4.03: MSCS Installation
508979     SAP DB/MaxDB/liveCache-Upgrade mit MSCS Cluster Var.1
843560     SAP DB/MaxDB/liveCache-Upgrade mit MSCS Cluster Var.2
912246     SAP DB/MaxDB/liveCache-Upgrade mit MSCS Cluster Var.3
570969     Servicepack3 mit MSCS Cluster
883537     Restart failed MSCS Cluster MaxDB/liveCache 2003-IA64
803452     MaxDB-Verzeichnisse in UNIX-Cluster für Failover
820824     FAQ: MaxDB / SAP liveCache Technology
regards,
Lars

2 Node ( Active + Activer Cluster )

i want to setup 2 node cluster in active + active topology .so that one node fails all services will be running on single node .
can anyone guide me in this regard
Regards

This is the normal way that a cluster would be set up. Just read the manuals for the data services you are trying to create.
http://docs.sun.com/app/docs/coll/1124.4
Tim
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Active active cluster

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