Kernel Upgrade in MSCS cluster

[Former Member]

Hi all,

I have to do Kernel Upgrade in MSCS environment.

Please suggest me how to do?

Regards,

shanker C

[Former Member]

Perform the following steps(valid for MSCS windows 2003 Netweaver 7.0 onwards)

1. Stop all SAP instances and services including Cluster Services/Dialog Services/ERS Services and SMD services.

2. Take backup of K:\usr\sap\<SAPSID>\SYS\exe\NTAMD64 folder

3. Uncar SAPEXEDB.sar and SAPEXE.sar to a folder. Copy all files and copy paste to K:\usr\sap\<SAPSID>\SYS\exe\NTAMD64. Do not delete files and move kernel, only overwrite the files and folder inside the directory, keep intact the files which are not part of the kernel.

4. Change the files in the c:\windows\sapcluster folder the ones for which new version is available in the new kernel.

5. Bring up the all instances/services, the sapcpe.exe will copy over the required files from the central kernel folder to the required directories.

award points for helpful answer

Yogi

[Former Member]

Apart from the above points you also need to change few files in system32 dir (sap* files)

This has to be done on both the nodes.

You need to download NTCLUS.SAR apart from the kernel SARs

Regards,

Rajneesh

[Former Member]

Hi Shanker,

Given below is the procedure to perform kernel upgrade in MSCS environment

Activities to be done at OS level

1. Stop all instances and take all the resource offline(including windows cluster service) in cluster administrator.

2. Unpack the archives to a working directory and take backup of usr\sap\<SAPSID>\SYS\exe\uc(nuc)\<Platform>:and replace all old files with the new one.

3. On all MSCS nodes, replace the SAP cluster dlls with those in NTCLUST.SAR

a) Copy ntcluster\saprc.dll %windir%\system32

b) Copy ntcluster\saprcex.dll %windir%\system32

4. On all MSCS nodes, replace the following dlls and exe in the

windir%\SapCluster folder with those in folder \usr\sap\<SAPSID>\SYS\exe\uc(nuc)\<Platform>:

sapevents.dll

sapntchk.exe

sapstartsrv.exe

sapxpg.exe

5. Bring cluster resources online and start the instances.

Hope this answer your question

Regards

Waseem

[Former Member]

please check the below link:

Regards,

pavan

[Former Member]

Hi,

>Please suggest me how to do?

Read the documentation, check your specific company needs and levels of service, prepare your strategy and operation phasing.

Then if you have specific questions, come back to the forums.

Of course if this is a production system, test the operation first on a testbed system.

Regards,

Olivier