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

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Hi,
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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
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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.
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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?
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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>
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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">
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<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>
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<property name="activationAgent.WSS_SAP.className" type="xs:string"
many="false">oracle.tip.adapter.fw.agent.jca.JCAActivationAgent</property>
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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

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
---

DB & CI - MSCS Active-Active Cluster configuration.

Hi all,
I could find several solutions searching for posts about Clustering, but am still having doubts.
We are going to install servers for our erp application - SAP. One server shall be DB server (Database) and another CI server (Content). OS - Windows Server 2003 -R2, Enterprise Edition and SQL 2005.
We want to have both these servers to be clustered as Active-Active. Going through the posts, Active-Active does not seem to be recommended from microsoft compared to Active-Passive cluster.
Can someone please guide about this ?
Also if someone can please provide link - how to configure Active-Active cluster in Windows server 2003 for SAP servers. Sort of step-by-step guide if available ?
Thanks in advance.
Kalpesh

Hi,
You don't tell us which SAP ERP product you want to be clustered...
ECC is different from R/3 for this matter...
SAP MSCS Clusters are active-active in the way that each node has its own role in nominal configuration (no fail over).
SAP MSCS clusters are Active-PAssive in the way that tha database or SAP components run on only one single node.
For ECC6, you have SQL server running on one node and the SCS running on the other node.
If you want to really use the cpus of the second node, you can install the CI (which is in fact the first DI) on the second node.
For MSCS, you have to follow the configuration explained in the SAP installation guide. Otherwise your system will not be supported.
Regards,
Olivier

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

RAC Active Active cluster failover time

Hi,
In a RAC active active cluster , how long does it take to failover to the surviving instance.
As per the docu I understand that rollback is done just for the select statements and not others. Is that correct?

RAC is an active-active cluster situation by design.
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When an instance of a RAC cluster is crashed, the surviving instances (actually the voted master instance) will detect an instance is crashed, and recover the crashed instance using its online redologfiles. Current transactions in that instance will be rolled back. The time it will take is depended on activity in the database, thus the amount to recover.

How to know the Cluster is active active or Active Passive

Friends
A quick and easy Question. I am pretty new to Clustering. How do I know the cluster is whether active active or active passive?

Hi Prasant,
Simple two-node, for Active-Passive cluster, only a single SQL Server instance is running. For Active-Active cluster, both SQL Server instances are running on each physical node of the cluster.
Generally, we can use one of the following options to identify the active node in a SQL Active-Passive Failover Cluster. For more details, please review this
blog.
1. In “Failover Cluster Management” console, you can see the current active node under the label “Current Owner” from summary screen.
2. Run the following T-SQL in SQL Server Management studio.
SELECT SERVERPROPERTY('ComputerNamePhysicalNetBIOS')
There is also a similar thread for your reference.
https://social.technet.microsoft.com/Forums/en-US/be030e90-f41e-4d42-89e0-ae2a740fbb54/how-to-determine-a-node-is-active-or-passive?forum=sqldisasterrecovery
Thanks,
Lydia Zhang

Install SSAS and SQL on an Active-Active Cluster

Hello
I have to install SQL 2014 and SSAS on a 2-node FCI and I'd like to have SQL running on one node and SSAS on the other one so I can accomplish an Active-Active Cluster.
Is there any ste-by-step guide to do this?
Thanks
Javier Villegas |
@javier_vill | http://sql-javier-villegas.blogspot.com/
Please click "Propose As Answer" if a post solves your problem or "Vote As Helpful" if a post has been useful to you

Yes, you can have SQL Service running on one node and SSAS running on another node. In the truest sense its never active-active. But if you consider both nodes are active with different services rather than just staying passive then its fine.
Just that you install each of these in two different groups.
Find the step by step tutorial for SQL Service.
http://www.pythian.com/blog/how-to-install-a-clustered-sql-server-2012-instance-step-by-step-part-2/
http://www.pythian.com/blog/how-to-install-a-clustered-sql-server-2012-instance-step-by-step-part-3/
For Analysis Services check this whitepaper
http://download.microsoft.com/download/D/2/0/D20E1C5F-72EA-4505-9F26-FEF9550EFD44/SSAS_Failover_Cluster_V4.docx
Regards, Ashwin Menon My Blog - http:\\sqllearnings.com

SAP cluster active/active Windows and cluster active/pasive Database

Dear Experts,
I need to know if SAP is restricted to work in an active / active cluster Windows R2 and database cluster with passive / active. Maybe Oracle database.
Maybe they can give me some information on how to do it or tell me if this combination is NOT possible. Maybe Oracle as database.
Please any information you can give me I thank.

Hi Kumar,
Please gothru the Installation guides under http://service.sap/com/instguides for required SAP DVD's and PAM for compatible DB's.
In Node A --> You start with ASCS + SCS installation as below
1.) Central Services Instance for ABAP (ASCS) -- Consists of Msg. service & Enqueue Service (Shared Disk)
2.) Central Services Instance (SCS) -- Consists of Msg. service & Enqueue Service (Should be installed after installation of 1.) (Same Shared Disk)
3.) First Microsoft Cluster Service (MSCS) -- This step creates the SAP cluster group on the first MSCS node and adds the ASCS and SCS instance(s) to the SAP cluster group
4.) Database Instance
Node B
5.) Additional Microsoft Cluster Service (MSCS)
6.) Enqueue Replication Server BOTH NODES, First in NODE A followed by NODE B
7.) Central Instance NODE A-- If you install the central instance on one of the NODE A, make sure that you use a local drive, not a shared drive.
8.) Dialog Instance NODE B-- Same procedure as in NODE A.
When NODE A fails, the ASCS and SCS failsover to NODE B and Dialog instance on NODE B act as CI.
Refer to below doc for more information - http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/00004f25-6190-2b10-2c8b-fa419234c28b
http://scn.sap.com/docs/DOC-25454
Thanks,
Arjun

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