CloudSim · 01 · Explore
Explore before you commit.
CloudSim is an open-source cloud infrastructure simulator built to help developers, students, architects, and the broader community explore infrastructure ideas and test architectures without immediately provisioning real cloud infrastructure.
Make infrastructure experimentation accessible to everyone.
Cloud infrastructure is powerful. Experimentation shouldn't be expensive.
Trying a simple architecture can require:
CloudSim moves experimentation earlier in the process. Instead of asking "Should I deploy this and see what happens?" — you can ask:
What happens if I simulate it first?
Preview
Six cloud vendors. One simulator.
CloudSim is being built to support six cloud environments:
# illustrative — architecture, not a live config
SUPPORTED_VENDORS=aws,gcp,azure,vultr,hetzner,ovhcloud
CloudSim intentionally focuses on fundamental infrastructure building blocks — not every service each provider offers.
CloudSim starts with the fundamentals.
Compute
Simulate and experiment with compute resources and virtual machines.
Storage
Simulate disks, volumes, and storage attachment/detachment behavior.
Networking
Simulate networks, connectivity, and infrastructure networking behavior.
Compute, storage, and networking are the foundation. Everything else is community-built from here.
A foundation for the community.
CloudSim is not primarily intended to be a closed commercial product. It's an open-source community project designed to evolve as contributors participate.
Start with the basic pillars. Let the community build what comes next.
What people use CloudSim for.
Learn
Explore cloud infrastructure without immediately creating a cloud environment.
Experiment
Test an infrastructure idea before it becomes a real one.
Architecture
Compare infrastructure approaches side by side.
Development
Experiment with infrastructure behavior while developing applications.
Education
Give students a way to learn infrastructure concepts without expensive cloud environments.
Community
Extend the simulator with new infrastructure capabilities.
Start with exploration.
CloudSim is open source, local-first, and free to run. No cloud account required.