Simstack Architecture

Simstack II was implemented using the following architecture:

Overview of the graphical user interface concept

Starting at the bottom right, then end user interacts with a web-based graphical user interface (GUI) implemented using Next-JS. The GUI interacts with a backend implemented using FastAPI, which in turn interacts with a MongoDB database to persist data. The backend also interacts with remote resources, so called runners, where the python code is actually executed. The graphical user interface is decribed in more detail in using_gui_section.

In a typical installation Simstack II requrires only one instance of the Next-JS frontend, one instance of the FastAPI backend and one instance of the MongoDB database server. Each user has his/her own database in the MongoDB server. The runners are installed for each user on the required remote resources and automatically update themselves from one or several GIT repositories, which may be different for different users.