Presentation on theme: "Adam Duffy Edina Public Schools. The heart of virtualization is the “virtual machine” (VM), a tightly isolated software container with an operating."— Presentation transcript:
The heart of virtualization is the “virtual machine” (VM), a tightly isolated software container with an operating system and application inside. Because each VM is completely separate and independent, many of them can run simultaneously on a single computer. A thin layer of software called a hypervisor decouples the VMs from the host, and dynamically allocates computing resources to each VM as needed.
Server consolidation ◦ Fewer pieces of hardware to manage ◦ Reduce energy costs ◦ Take up less space in the server room ◦ Make more efficient use of hardware
Hardware independence ◦ VMs can be moved between hosts with different hardware, thanks to the hypervisor Entire system (OS, applications, and data) is contained in a set of virtual machine files. ◦ Provides flexibility in managing servers Centralized server management
If server hardware fails, how easily can you restore operations? How much CPU and RAM is wasted in your traditional servers? How much downtime do you experience if you have to replace or upgrade server hardware? If software changes cause the server to fail, how easily can you recover? How easily can you deploy a new server?
Capture the state of a server at a point in time You can safely make changes, knowing that you can revert back if something goes wrong Integration with backups ◦ Snapshots themselves are not backups!