MSCS Cluster Installation

[Former Member]

Hello Experts,

Can anybody help me configure the SAPGUI on the end user's system in a MSCS Cluster installation ?

I have Central Instance on Node 1 and Dialog Instance on Node 2 with SQL Server 2005 on Windows 2003 Enterprise Edition. The SQL and SAP cluster is working absolutely fine, but when there is a failover to Node 2, the user's connection to the server is getting disconnected

Please advice.

Edited by: The Fuhrer on Dec 18, 2008 5:45 AM

[Former Member]

try updating The SAP MSCS Cluster DLLs to latest

Support Packages and Patches -> Additional Components -> SAP Kernel

saprc.dll

saprcex.dll

sapclus.dll

sapmmc.dll

Please check the sap services are pointing to the correct exe's.

And that sapstartexe and saposcol are at the same patch level as

the disp+work.exe.

If this is ok can you start the services from a command prompt?

Please also try...

1. Stop the SAP service

2. Open a command prompt

3. Go to usr\sap\<SID>\exe\run

4. call 'sapstartsrv.exe -t' from the command line

5. Confirm the dialog window

6. Start the service again

Please check attached notes as well:

145666 Start and stop of R/3 in MSCS environment

676073 MSCS Installation for SAP Web AS 6.40 on Windows

502203 SAP resource DLL

684106 Microsoft runtime DLLs

112266 SAP and MS Cluster Server: Frequent questions and tips

Samrat

[Former Member]

Hi,

See the link.

http://help.sap.com/saphelp_nw70/helpdata/en/04/285ea6a87f11d194a400a0c930df15/content.htm

Anil

[Former Member]

Rao,

Are other services are failing over to the other node without any problems ? Did you try right clicking on ASCS and SCS and tried " Bring Online" option ? Have the instances been installed on the SAN box ?

[Former Member]

Hi

Thanks for reply

I installed ASCS and SCS in virtual Hostname(it is in SAN).

Installation finished successfully without any errorrs. I installed as it is in installation Doc.

While moving the groups manually from Node 1 to Node2 these two services are failed.

I am not able to bring it online again. please advise me.

Regards

Rao.

[Former Member]

Rao,

- Check if all the SAP Services are running in the background.

- Check the mapping of the virtual IP addresses for the Cluster group they are part of. Also, all of their dependencies are up and running.

- Have you checked all the Post Installation activities ? All done successfully ?

- Check if the DB services are running and also that you are able to connect to it.

I also had this problem in the initial stages of the installation. I did a reinstallation although, I had a tough time uninstalling the ASCS and SCS instances.

[Former Member]

Hi ,

Thanks for reply,

Still the problem is not solved. So I am doing reinstalltion. Mean time I did the installtion of Portal production server in MSCS(Os is Win 2003 x64bit and Database DB2UDB 9.1fp5. Netweaver 2004s EP7.0). Installtion finshed. Only one node is working at a time. If i move from groups(SAP and DB2) node1 to node2 in node2 i need to start the mmc again . node1 jcontrol.exe is stopped. Agin If i move groups(SAP and DB2) node2 to node1 again i need to restart the MMC in node1 then only node1 is working again node2 jcontrol.exe is stopped. I am not able to solve this problem. I think synchronization problem(bootstrap).

Regards

Rao

[Former Member]

Hi Rao,

You are installed ECC6.0SR3 on MSCS with DB2 9.1aFP5.

Please tell me the procedure installation of ECC6.0SR3 on MSCS with DB2 9.1aFP5.

I have the two Nodes with windows 2003ENT server OS and I have the one SAN.

I am new to the windows cluster environment.

How to configure virtual host and IP configuration.

I need Sap installation steps also.

[Former Member]

Hi Kiran,

Follow the installation guide it is having the step by step process.

1) create the quorum in the shared disk.

You need to have SAP GROUP, DB GROUP and CLUSTER GROUP in the shared disk.

so create the P --> QUORUM(nearly it will take 2 gb only)

Q---> SAP GROUP

R----> DB GROUP.

M---> LOG FILES1

N---> LOG FILES2.

all these drives should be seperate hardisks(suppose u have 300 gb hard disk better to keep it in seprate harddisk for all these drives).

and u should have 7 ip address.

You ask u r network guy to create the 3 virtual ip address

virtual hostname for ASCS and SCS

Virtual hostname for database

Virtual hostname for clustergroup.

These 3 ip address shoul not give any rreply

during installation time u have to give these ipaddress hostname.

automatically it will be used during installation.

1)Installing the central service instance for ABAP(ASCS) in node1.

2)Installing the central Service instance (SCS) in node1.

3)Configuring the First MSCS Node in node1.

4)Installing the Database Instance on an MSCS Node ---> node1.

5)Configuring Additional MSCS Node

6)Instaling an Enque Replication Server on both nodes for ASCS and SCS.

7)Installing the Central Instance in node1.

8)Installing the Dialog instance in Node2.

9)Installing Additional dialog instances outside the MSCS.

These are the steps to be follow.

If You need any further information I can help.

Regards

Rao.

[Former Member]

Hi rao

I am installing Ecc6.0 sr3 with db2 database with MSCS.

I create the quorum in the shared disk.

SAP GROUP, DBGROUP and CLUSTER GROUP in the shared disk.

Create the Q--> QUORUM

S---> SAP GROUP

R----> DB GROUP.

in Node 1 I installed

1) Installing the central service instance for ABAP(ASCS) in node1.

2) Installing the central Service instance (SCS) in node1.

3) Configuring the First MSCS Node in node1.

Now am Installing the Database Instance on an MSCS Node 1

In the middle of the installation it is giving the error configuration the DB cluster group creation

With DBMSCS command

I find the two dbmscsfile

1) Db2mscs.ee

2) Db2mscs.eee

Which file I can use

In db2mscs.eee file two group creation format is there.

Please tell me the procedure to create the DB group in cluster with DBMSCS command. (Node A)

give the steps to create the dbgroup.

[Former Member]

Hi kiran

use db2mscs.eee is the template and copy this to db2mscs.cfg.

and edit the file using page number 255.

#

1. Global section

#

DB2_INSTANCE = DB2<SID>

DB2_LOGON_USERNAME = domainname\db2<sid>

DB2_LOGON_PASSWORD = password

CLUSTER_NAME = clustername

#

1. MSCS Group for Node 0

#

GROUP_NAME = DB2 <DBSID> Group

DB2_NODE = 0

IP_NAME = DB2 IP <SID>

IP_ADDRESS=ipaddess of virtual db2 server

IP_SUBNET=subnet mask ipaddress

IP_NETWORK=Public LAN

NETNAME_NAME = DB2 NetName <SID>

NETNAME_VALUE = hostname of virtual db2 server

NETNAME_DEPENDENCY = DB2 IP <SID>

DISK_NAME = Disk L: these 3 are the shared disks

DISK_NAME = Disk M:

DISK_NAME = Disk N:

INSTPROF_DISK = Disk L:

#TARGET_DRVMAP_DISK = Disk M:

#

1. MSCS Group for Node 1

#

#GROUP_NAME = DB2 Node 1

#DB2_NODE = 1

#IP_NAME = IP Address for Node 1

1. IP_ADDRESS=9.26.118.252

2. IP_SUBNET=255.255.255.0

3. IP_NETWORK=Ethernet(2)

#NETNAME_NAME = Network Name for Node 1

1. NETNAME_VALUE = DB2SRV1

2. NETNAME_DEPENDENCY = IP Address for Node 1

#DISK_NAME = Disk O:

#TARGET_DRVMAP_DISK = Disk O:

please follow the isntallation doc it has given very clearly. page number 254.

if u need any further guidence i will.

Kiran have u finshed the installation

Regards

Rao .

Edited by: Rao on Jun 22, 2009 12:44 PM

[Former Member]

Hi Kalpesh,

Have you completed the installation ? Or, still looking out for some info ?

[Former Member]

please try the below link this might help you in doing so

http://www.id.uzh.ch/dl/sw/sap/SAPGUI/SAP_FE_Instguide_710.pdf

http://help.sap.com/saphelp_45b/helpdata/EN/93/e641364ba811d189510000e829fbbd/content.htm

http://www.saptechies.com/sap-system-under-microsoft-cluster-server-mscs/

[Former Member]

Hi

I installed ECC6.0SR3 on MSCS with DB2 9.1aFP5 Successfully.

While moving the groups from Node 1 to node2 the services of ASCS and SCS are failed.

I am unable to bring it online. Can you tell me the solution for this. How to resolve this.

Regards

Rao.

[Former Member]

Hi,

As per your query you go of clusting.

Anil

[Former Member]

If the user is logged on then he will get disconnected and he has to login again to gain access to the system. Configure the entry in the logon pad with respect to the virtual name for sap cluster and not with the individual names of the instances.

...Anand

[Former Member]

Thanks Anand for the information.

I have configured Logon groups and subsequently, configured the SAPGUI as a GROUP/SERVER selection and the failover is working fine now.

The above is working fine within the network. However, I am still unable to configure the SAPGUI for remote login as its not allowing me to enter the SAPRouter details.

I enter the SID and the Message server addresses in the GUI, but since I am unable to enter the SAPRouter address, its not able to locate the Message server which is on a different network.

This is on SAPGUI 640.

Please advice.

[Former Member]

Additionally try entering the SAP Router adress in SAPGUI for the server entry. It should work.

...Anand

[Former Member]

Hello,

We have a similar case. We want to install DB and CI as Active-Active cluster on Windows Server 2003 platform, SQL 2005. We shall have all partitions on SAN storage.

Can you please provide some good guidelines for configuring it ? Like how many partitions and sizes apprx. are required ? Any step-by-step sort of document ?

Thanks and regards,

Kalpesh

[Former Member]

Hi,

To enable correct operation of the failover mechanism, you have to map all IP addresses in the cluster to host names. You can do this on a Domain Name System (DNS) server or in the Windows hosts le.

The mapping enables the system to translate host names into IP addresses. Host names are normally used for administrative tasks because they are easier to use than the long, numeric IP addresses. However, the system can only respond to host names if they are translated into IP addresses with the information stored on a DNS Server or in the hosts file.

Check the below link

http://help.sap.com/bp_bpmv130/Documentation/Installation/PostInstallation_Abap.pdf

Hope it helps you.

Rgds,

Suman