Understanding SUM and Shadow System :-


These are few sap blogs which makes sum understanding easy :-

Introduction to SAP Shadow System : https://blogs.sap.com/2014/04/02/sum-introduction-to-shadow-system/

Introduction to SUM :
https://blogs.sap.com/2012/11/07/software-update-manager-sum-introducing-the-tool-for-software-maintenance/

SUM 2.0 SPS 06 : https://blogs.sap.com/2019/10/02/new-dialog-sequence-with-sum-2.0-sp-06/

SAP SUM upgrade Phases : https://blogs.sap.com/2020/09/25/sap-sum-software-update-manager-upgrade-phases/

Zero Downtime Approach : https://blogs.sap.com/2020/06/28/zero-downtime-zdo-of-sum-project-planing/

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