VPS vs Dedicated Server

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[Eli]

[Eli]

[Eli]

VMs, Hypervisors, Virtualization, Containers











Virtualization: Use a single physical machines' hardware to run multiple virtual machines within it.

Hypervisors are virtualization software.

VMs vs Containers:

1. The level at which virtualization happens - virtualization happens at hardware level vs. OS level
2. The type of isolation achieved - isolation of machines vs. isolation of processes
3. How resources are accessed - via hypervisor vs. via kernel features such as namespace and cgroups
4. Flexibility of hardware vs. portability

VMs virtualize hardware, isolating entire machines; containers virtualize the OS, isolating processes. VMs use hypervisors for resource management; containers leverage kernel features (namespaces, cgroups). VMs are less portable than containers.

Kubernetes are orchestration tools for containers.