S/4HANA conversion - log files and long running phases

[danielsapbasis]

Hi Experts,

What are the log files to be monitored in the preprocessing and downtime phases of s/4hana conversion in order to

* Identify the errors in advance

* Estimate a particular run completion and progress

* To compare the source and target objects status in shadow instance

* Differentiate the actual db migration and conversion status

* Long running phases in conversion

Pls let me know based on real time scenario.

Thanks in advance