Eucalyptus

• Targeted Service Model
  • Infrastructure as a Service (IaaS)

• Targeted Deployment Model
  • Public Cloud
  • Private Cloud
  • Hybrid Cloud

• Licensing
  • Open-Core (There is a Community as well as an Enterprise edition)
  • Simplified BSD License, GNU GPL v3

• Hypervisor Support
  • Xen
  • KVM
  • VMWare Hypervisors

• Network Models

  	Physical Network Requirements	Networking Features

Note(s):
Level-3 VM Isolation Only

• Storage Support
  • Walrus
    • S3 Compatible bucket storage manager
    • Handles storage of user data as well as filesystem images, kernels and ramdisks.
  • EBS (Elastic Block Store) Support over AoE (ATA over Ethernet) of iSCSI

• Control Panel
  • Web-based UI
  • Command Line Tools

• Virtual Machine Image Registry
  • Via Walrus

• Security
  • SSH key pairs for Authentication while logging into VMs
  • Ability to create security groups to control user access
  • Storage service (Walrus) implements ACLs
  • VM Isolation using Security Groups

• Interoperatibility
  • Supports EC2 API
  • Supports S3 API

• VM Scheduling
  • RoundRobin
  • Greedy

Source(s):
http://open.eucalyptus.com/learn/what-is-eucalyptus