Compute architecture

• Compute server architecture overview
• Choosing a CPU
• Choosing a hypervisor
• Choosing server hardware
  • Considerations when choosing hardware
    • Instance density
    • Host density
    • Power and cooling density
  • Selecting hardware form factor
  • Scaling your cloud
• Overcommitting CPU and RAM
• Instance storage solutions
  • Non-compute node based shared file system
  • On compute node storage—shared file system
  • On compute node storage—nonshared file system
    • Issues with live migration
    • Choice of file system
• Network connectivity
• Compute server logging

This section describes some of the choices you need to consider when designing and building your compute nodes. Compute nodes form the resource core of the OpenStack Compute cloud, providing the processing, memory, network and storage resources to run instances.