The Relationship and Differences Between Type I and Type II Virtualization

Virtualization can be thought of as “building a house”:

Type I (Bare Metal) directly builds a “virtualization layer” (Hypervisor) on the “foundation”—the bare metal hardware, and then treats each operating system as a “tenant”. There is no “landlord”; the house is directly on the foundation, providing the best performance. Typical representatives include: VMware ESXi, Xen, KVM.

Type II (Hosted)

first lays down a “landlord”—the host operating system, and then builds the “virtualization layer” on top of this layer, where the tenant OS can only reside on the second floor. The house has an additional layer between it and the foundation, resulting in slightly lower performance, but it can leverage the host OS’s drivers and toolchain for simpler deployment. Typical representatives include: VMware Workstation, VirtualBox, Parallels.

Relationship: Both use a Hypervisor to partition hardware resources, allowing multiple operating systems to share the same machine.Differences:

  1. Layer Level: Type I operates directly on hardware; Type II operates within the host OS.

  2. Performance: Type I is close to native; Type II has an additional layer of scheduling, resulting in slightly higher overhead.

  3. Usability: Type I requires specific drivers and tools; Type II can utilize the host ecosystem, making it ready to use upon installation.

Related posts

  1. A Decade Late: Cortex-A72 Finally Welcomes Mainline EDAC Driver
  2. JLink Tips for Downloading HEX Files to Microcontrollers
  3. Five Methods to Improve PCB Heat Dissipation Performance
  4. Top Ten Pitfalls in CANopen Bus Design! ID Conflicts Cause Production Line Shutdown!
  5. Six Key Security Elements of Edge Computing Security
  6. Applications and Development Prospects of Edge Computing in IoT
  7. Technical Route of C# Industrial IoT and Integration Systems Solutions
  8. Expert Consensus on Clinical Application of Metformin (2023 Edition)
  9. Essential Knowledge Points for C Language Beginners: Series of 100 Notes – 18. Increment (++) and Decrement (–) Operators
  10. PCB Layout and Wiring Requirements for MIPI D/C PHY
  11. Key Points for Controlling Siemens PLC with C#
  12. RISC-V Will Reshape This Type of Chip
  13. C Language Experience Discussion (Part 5): Integer Overflow – Let Your Program Crash Silently
  14. Feasibility of Pluginization in Tauri Applications for GUI Development with Rust
  15. Product Manual for Chuchen Technology GCC3000X2 Bilingual Menu Two-Wire Ultrasonic Level Meter
  16. Bandwidth Reduced by 70% Just by Changing HTTPS to HTTP!

Leave a Comment