MultiCloud Classroom notes 25/Jan/2025

Virtual Machines

Virtual Machines are created by Hypervisors.
Each Virtual Machines gets the following virtual components
- CPU
- RAM
- Disk
- Network interface
The Operating System in the Virtual Machine is generally selected as Image while creation.
All the popular OS Images will be provided by CSP, we can also create custom images or use Market Place.
Virtual Machines Performance is impacted by the Physical Server’s hardware configuration.

Organization use On-prem datacenters to create local infrastrucutre,
To create virtual machines from physical servers we need Hypervisors
Popular Hypervisors used in Enterprise are
- Vmware
- Nutanix
- Hyper V
Private Cloud: Private Cloud gives cloud like services on the hardwared owned by a Organization. Options are Openstack. Private Cloud is maintained by the Organization itself.

We can create virtual machines on-demand almost in any geography in the world
Autoscalings, HPC’s etc are possible.
The Service that offers Virtual Machines in
- Azure => Azure Virtual Machines
- AWS => AWS EC2

AWS Classifies instance type into categories -> family -> generation -> size
Categories:
- General Purpose:
  - They have balanced CPU to RAM Ratio
- Compute Optimized:
  - High CPU to RAM ratio
- Memory Optimized
  - High RAM to CPU Ratio
- Storage Optimized
  - These machines are optimized to Read/Write data from disks quickly
- Accelarted Computing: Parallel Processors
- HPC Optimized
Instance Family: This refers to an Hardware Specification and they have Generations
AWS INstance type Naming convention Refer Here