# 3. Architecture Overview

The OpenDC simulator has two main components: `odcsim`, a general framework for discrete event-based simulation, and `opendc` a collection of components using `odcsim` to simulate datacenters. We discuss both in turn!

`TODO: Add a schematic general overview here.`

## 3.1 `odcsim`


## 3.2 `opendc`

**TODO: What are the main components (odcsim-core, odcsim-engine, opendc-core, opendc-format, opendc-testkit, opendc-workflows, I assume)? Short description of each in a bullet list (or even a schema drawing, if you have the time). Why this division?**

**TODO: One section per component, explaining what their responsibility is and what other modules they talk to. In what kind of scenarios do you as OpenDC developer need to touch/change them?**

---
[< Previous](setup.md) | [Next >](run.md)