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Scenario

With Software Update Manager (SUM) 1.0 SP 20 (and higher), a new use case is introduced for DMO of SUM: DMO with System Move. This blog provides an introduction into this use case, which is of course described in the respective DMO guide, section “DMO with System Move”.

Note: you should be familiar with the DMO introduction before reading this blog.

Scenario is that you want to change the host of your Primary Application Server (PAS) instance during the DMO procedure. Until now, this was not possible during DMO.

Feature

With this use case, it is possible

  • to change the PAS host inside your System landscape, or
  • to move your system to a different network area / data center, or
  • to migrate your system from on-premise to HANA Enterprise Cloud (HEC), or other cloud providers

Note:

  • for SAP internal colleagues, this procedure was known as “DMO to SAP Cloud”. It is now available not only for targeting SAP Cloud.
  • “DMO with System Move” works for target database type SAP HANA and SAP ASE.
  • Restrictions are listed in the SAP note for DMO, see http://support.sap.com/sltoolset.

Approach

Preparation

  • Before starting the DMO procedure, you have to set up the new PAS host in the target landscape, in addition to the target database
  • You do not have to set any specific control file or parameter before starting the SUM

Enabling the use case

  • On the dialog with DMO details (like Migration Key), an option “DMO with System Move” is offered.
  • When this option is selected, the SUM will execute some tasks in the source landscape (like export the data from the source database), and afterwards execute some tasks in the target landscape (like Import the data to the target database).
  • In the source landscape, the target database parameters (like database host name) do not have to be provided
  • Once the tasks in the source landscape are finished, the SUM will tell you on a dialog to copy the SUM directory to the target landscape, in which the procedure will be continued. The SUM directory contains all required files
  • Transfer of SUM directory can be done e.g. via network (if possible), or via USB disk.

To reduce the downtime, it is possible to use a parallel mode in which data export and data import is running in parallel. Interested? You have to consult the DMO guide anyhow – the parallel mode is described in there, and is beyond this short introduction.

Kind regards,

Boris Rubarth
Product Manager SUM, SAP SE

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138 Comments

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  1. J A

    Hello Boris Rubarth,

    Can we move to Cloud provider using Classic DMO (no System Move) then uninstall PAS and ASCS in source datacenter and then install a new ASCS and PAS on cloud provider?

    Is this technically possible and/or supported? 

    Best regards,

    JAM

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    1. Boris Rubarth Post author

      Hello JAM,

      for standard DMO, this approach is not supported, and we have noted this in the respective SAP note on DMO:

      “Using DMO for a migration across data center is not supported (PAS host and DB host in different data center). …”

      You find the actual note listed in http://support.sap.com/sltoolset.

      Best regards, Boris

       

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      1. J A

        Thank you for the input Boris Rubarth . Let me explain a little more the scenario:

        The system we want to migrate is currently on iSeries platform. We want to move the system to a cloud provider where there’s no iSeries Platform available. Thats why we can’t use the “System move” option.

        So we were thinkg about using the Standard DMO across datacenters until the migration process is done, Not for productive use. After the DMO process have finished, uninstall the PAS and ASCS on current datacenter and then install them in the Cloud datacenter, then Go Live. Can this be supported or work as an exception?

        Best regards,

        JAM

         

         

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  2. Aamrin Firdoush

    Hi Boris,

    can you brief me about the serial mode of System move.I have selected serial mode and the SUM process is completed in source host and i have moved the SUM directory to target host and it has started in phase MAIN_MIGSERIALSETUP/HOSTCHANGE_MOVE.On my target host it is asking the PAS host and instance number ,so the input should be from my old host or new,when i proceed it search for usr/sap/SID/profile with new host but there is no new profile created yet.Do we need to do anything manually to bring it on the target host?I dont see any special step on guide for serial mode.

    Thanks,

    Aamrin

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    1. Boris Rubarth Post author

      Hi Aamrin,

      all parameters that SUM asks for on target are about target PAS. If you have installed a PAS, then there are profiles created. This is independent on whether serial or parallel mode is used.

      Regards, Boris

       

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      1. Aamrin Firdoush

        Hi Boris,

        Thanks,i was missing the PAS instance,after installing it worked.

        Downtime migration phase is over  on target host but i am stuck with saplikey issue .here is the log,i tired to delete it manually but it is giving me error”Can’t delete any license keys because of an error when trying to retrieve all records from the store.”

        3 ETQ120 20180710093923: PID 10326 execute ‘~/exe/saplikey -get’, output written to ‘/usr/sap/SUM/abap/log/SAPLIKEY.OUT’.
        3 ETQ122 20180710093923: PID 10326 exited with status 0 ” (time: 0.0/ 0.0/ 0.0/766MB real/usr/sys/maxmem)
        2 ETQ399 Retrieved local hardware key from ‘saplikey’ call as ‘Q1488002337’.
        1 ETQ399 Installing new temporary license for system.
        3 ETQ120 20180710093923: PID 10327 execute ‘~/exe/saplikey pf=/usr/sap/D01/SYS/profile/D01_D00_uscls4hd01cs1 -delete D01 Q1488002337 *’, output written to ‘/usr/sap/SUM/abap/log/SAPLIKEY.LOG’.
        3WETQ122 20180710093924: PID 10327 exited with status 2 ” (time: 1.0/ 0.0/ 0.0/766MB real/usr/sys/maxmem)
        1EETQ399 Last error code set is: Process /usr/sap/SUM/abap/exe/saplikey exited with 2, see
        1EETQ399X’/usr/sap/SUM/abap/log/SAPLIKEY.LOG’ for details
        1EETQ204 Upgrade phase “INSTTEMPLIC_MIG” aborted with severe errors (“20180710093924”)

        In SAPLIKEY.OUT ,we are getting below logs:

        EXECUTING /usr/sap/SUM/abap/exe/saplikey -get
        E
        ===…could not load SSF library /usr/sap//SYS/exe/run/libsapcrypto.so .

        E 543 likey_init_clt: Couldn’t load SAPSECULIB
        (“/usr/sap//SYS/exe/run/libsapcrypto.so”) using function SsfSupInitEx (), rc
        = 10 (no library).
        E 542 likey_init_clt: At least one more attempt to load the SAPSECULIB will
        follow.

         

        Regards,

        Aamrin

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          1. Aamrin Firdoush

            Hi Boris,

            My issue was resolved .The solution to this was upgrading the kernel files in the /SUM/abap/exe/ directory .After the update I was able to proceed further and complete  my S/4 HANA conversion successfully.

            Regards,

            Aamrin

             

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  3. Sebastian Simon

    Hello Mr. Rubarth,

    We want to perform a really big change on our SAP BW systems and I’m not sure if this is possible with the SAP DMO system move option. Maybe you can give me a hint if our plan is working or not:

    Source: SAP BW 7.4 SP13, on Oracle 11.2.0.4.0 and HP-UX on ia64 machine

    Target: SAP BW/4HANA with HANA Database on SLES 12 and X86 -> completely different server and architecture

    Maybe the migration directly to SAP BW/4HANA is not possible. Then the we got to SAP BW 7.5 on HANA database on SLES 12 and X86. And in a second step with the SAP-BW/4HANA-Starter-Add-On to SAP BW/4HANA .

    Is this possible in general or do we need to make at first a heterogenous system copy from HP-UX to the new Server with SLES 12 on X86. And afterwards use DMO without system move option?

     

    Thank you very much!

     

    Best Regards

    Sebastian

     

     

     

     

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    1. Boris Rubarth Post author

      Hello Sebastian Simon,

      for targeting SAP BW/4HANA 1.0, SUM is not the tool of choice: you use SPAM/SAINT for that step.

      You may consider to use SUM 2.0 for the step from SAP BW 7.4 on Oracle to SAP BW 7.5 on HANA. In addition, you may check if “DMO with System Move” is an option to switch from HP-UX to SLES 12 on X86 in the same procedure.

      Best regards,
      Boris

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