Activating Zero Downtime Option (ZDO) in SUM


After completing this lesson, you will be able to:

  • Choose the ZDO approach in the SUM UI

Activation of ZDO in SUM UI

This section shows you how to select Zero Downtime Option (ZDO) in Software Update Manager (SUM) and provide the password for utilizing ZDO.

Selecting Zero Downtime Option in SUM UI

Zero Downtime Option is shipped as one of the downtime-optimization approaches within Software Update Manager 2.0. To enable the Zero Downtime Option approach, select the option as part of the dialog workflow in phase SELECT_ROADMAP.

If the dialog Scenario Strategy (step B) does not display the Zero Downtime Option (ZDO) approach, it might be that a component in the system is not ZDO enabled.

The log file for this phase can be accessed using SUM UI by clicking on the hyperlink SELROADMAP.LOG shown in the dialog (step B) Scenario Strategy. In the log file, search for the pattern Check if strategy 'ZDO' is possible.

As shown in the sample output (step C), the components that are not ZDO enabled are marked with a warning message 4WETQ399:

Code snippet
1 ETQ000 ==================================================
1 ETQ399 Check if strategy 'ZDO' is possible: 
2 ETQ399 Check if all components are ZDO enabled. 
4 ETQ399 Read 19 entries for table 'LIST'. 
4WETQ399 Component 'UNSUPP' with release '100' is not ZDO enabled. 
4 ETQ399 Component 'SAP_ABA' with release '75F' is ZDO enabled.
1WETQ399 => Strategy 'ZDO' is not possible. For details, see SAP Note 2707731. 
1 ETQ000 ==================================================

Authentication of Zero Downtime Option Approach

A password has to be requested before running ZDO using Software Update Manager. This section describes how to get the password to enable ZDO in SUM UI.

  • Using ZDO requires an educated employee who took the mandatory training and assessment provided in this Learning Journey.
  • Passing the assessment of this Learning Journey will provide a digital SAP Knowledge Badge.
  • The digital badge is issued by SAP SE and provided by (separate log-on required).
  • After receiving the digital badge, it has to be "accepted" and must be made "publicly" visible.
Keep in mind to create the incident in time to retrieve the password. This becomes very important especially for the productive ZDO run. In addition, the password is only valid for the system ID and SUM version stated in the incident.

Example for Incident to Request the Password

Create the incident using the SAP ONE Support Launchpad as per the following example:

SubjectPassword request for Zero Downtime Option of SUM

Dear SAP support,

herewith I request the password to enable the Zero Downtime Option approach on the system specified below.

The person listed below has taken the ADM330 training and successfully passed the SAP Knowledge Badge assessment, and is supporting the project. A link to the SAP Knowledge Badge is provided below.

System-ID: DEV

SUM-version: SUM 2.0 SP <xx>

Name: John Doe

Link to SAP Knowledge Badge:

Thank you and kind regards, Peter Pan

Choose the approach in the UI

Select Start Exercise to start the simulation.


  1. Provide the stack configuration file in SUM.

    1. Enter the path /usr/sap/PPM/download/stack.xml in the stack file text box.

    2. Click Next to continue to the next phase.

  2. Select the downtime-optimized approach.

    1. In the Scenario Strategy selection phase, choose the radio button Downtime-optimized (high configuration).

    2. In the newly expanded tree, choose Zero Downtime Option (ZDO).

      If Zero Downtime Option (ZDO) does not appear in the dialog, check the log file SELROADMAP.LOG that is linked in this phase on the SUM dialog screen.
    3. Choose Next to continue to the next phase.

  3. Provide the password to authenticate the usage of Zero Downtime Option.

    1. Enter the demo password 69190 in the Password text box.

    2. To continue to the next phase, choose Next.

  4. Switch on the Expert Mode.

    1. Select the Switch expert mode on check box.

    2. Choose Next to continue to the next phase.

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