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Could not save runtime in SGEN using NZDT

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Hi,

 

We have upgraded the SAP ERP 6.0 system from source release EHP5 to target release EHP6 using NZDM facility provided in SUM tool SP07.

 

Below are the details of infrastructure:

 

Operating System: Windows 2008 64 bit

Database: Oracle

SUM tool version: 1.0 SP07

Total Ram: 8 GB

CPU: 2 core

 

Source release: ERP 6.0 EHP 5

Target release: ERP 6.0 EHP 6

 

We have tried running SGEN in the uptime phase on shadow system during upgrade. And we consider that we may save our time in running SGEN once the upgrade is completed. We found some objects were not compiled after upgrade, e.g objects for t-code va01 and va02. So, we had to run SGEN after the upgrade was completed which took long time before completion.

 

Minimal downtime is 6h 32 min and total runtime of upgrade was 120 hrs (including SGEN and excluding wait/troubleshooting time).

 

My major query is why do we need to run SGEN after upgrade using NZDT technology. We should be able to save runtime of SGEN.

 

Also, business downtime is not near zero in our case. As per NZDT, it should be very less. So, how less can we expect the downtime to be using NZDT.

 

 

Regards,

Abhishek Kalra


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