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In this blog, I would like to explain the manual creation of the 2 cluster resources used by a clustered SAP NetWeaver (A)SCS instance.

There are some cases in which you need to add them manually, for example a destroyed Failover Cluster database, loss of cluster nodes configuration, or manually deletion of the resources.

Older SAP cluster groups contain:

  • the Generic Service resource (which starts the SAP Windows service)
  • the SAP Resource (which starts the instance)

New SAP cluster groups contain:

  • the SAP Service resource (which starts the SAP Windows service)
  • the SAP Resource (which starts the instance)

The new concept is more stable and offers better tracing and error checking. It is also mandatory to support the Rolling Kernel Switch (RKS).

In this example, I use the SAP SID “BER” and the instance number “00”.

  1. Generic Service (old configuration):Afterwards, change the name of the resource. Right mouse-click โ†’ Properties:add a dependency to the network name resource (the virtual hostname used for the (A)SCS instance):


    and finally do not forget to change the value “Maximum restarts in the specified period” to 0:

    You have successfully created the service resource!

     

  2. SAP Service (recommended):Add the resource:Right mouse-click โ†’ Properties:

    Change the name:

    add a dependency to the network name resource (the virtual hostname used for the (A)SCS instance):

    change the value “Maximum restarts in the specified period” to 0:

    enable the checkbox “Run this resource in a separate Resource Monitor”:

    change SAP SID:

    You have successfully created the SAP service resource!

     

  3. SAP Resource (= SAP Instance, mandatory)

    Same as 2., but this time add a SAP Resource:


    Right mouse-click โ†’ Properties:

    Change the name:
    Add the dependency to the SAP service (or to the Generic Service in older configurations):

    change the value “Maximum restarts in the specified period” to 0:

    enable the checkbox “Run this resource in a separate Resource Monitor”:

    and finally, change SAP SID and SAP System (number):

    You have successfully created the SAP instance resource!

 

The goal is to have two resources in the SAP cluster group containing a clustered (A)SCS instance:

 

 

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