Mod 3: Provisioning and Migrating Cloud Resources

What do compute heavy workloads rely on?

vCPU, memory, GPU

What do data intensive workloads rely on?

High IOPS storage

What are the 2 types of hypervisors?

Type 1. type 2

What is the difference between type 1 and 2 hypervisors?

Type 1 run directly on hardware, type 2 runs as an application

What is oversubscription?

Assigning more resources to VMs than the host system has available

What are preconfigured VMs that CSPs provide called?

Instances

What are the 6 most common instances that AWS provides?

General purpose, compute optimized, memory optimized, accelerated computing, storage optimized, HPC optimized

How do you calculate vCPUs?

Cores x threads = vCPU

What are pass-through GPUs?

Gives a VM direct access to an entire GPU, bypassing the hypervisor

What is the difference between a vCPU/vGPU and a normal CPU/GPU?

vCPU/GPUs are shared resources not allocated to a single client

What does compute usually refer to?

CPU + memory

What are Web Application Firewalls?

Firewalls that protect software running on webservers from code injection and DoS attacks

What is converged virtualization?

The combination of the CPU, memory, storage, and network configs into a single entity that can be split

What is hyperconverged virtualization?

The same as converged but cannot be split

What is the benefit to hyperconverged virtualization?

Simpler to manage and deploy

What are the 3 types of cloud migration?

On prem to cloud, cloud to cloud, cloud to on prem

What are the 4 phases of cloud migration?

Assessment, planning, implementation, optimization and security

What are the 3 types of virtualization migrations?

Physical to virtual, virtual to physical, virtual to virtual

What are the 3 types of Physical to Virtual migrations?

Manual, semi manual, automatic

What are the 8 cloud migration types?

Rehost, replatform, refactor, rearchitect, repurchase, retire, retain, hybrid

What is rehosting?

When an application is cloud ready

What is replatform?

When an application needs some modification before cloud deployment

What is refactor?

When an application will be restructured and optimized before cloud deployment

What is rearchitect?

When an application needs to be fully rebuilt before cloud deployment

What is repurchase?

When an application is retired and replaced by a modern cloud ready application

What is retire?

When an application is retired and not replaced

What is retain?

When an application is kept on prem

What is hybrid?

A mix of the other application migration strategies

What is pre-migration?

When an application is hosted in a single data center but used worldwide

What is post-migration?

When an application is hosted in data centers around the world and customers access the closest one

What is vendor lock-in?

Vendor lock in is when the cost is too high to switch from one CSP to another

What are some examples of vendor lock-in?

Database too large to move, CSP tools become integrated into services/apps

What is data gravity?

When the size of data makes it a critical concern in decisions

What are some concerns that arise from vendor lock-in?

Service quality degradation, cost increases

How can you prevent vendor lock-in?

Don’t store data in proprietary formats, maintain independent backups, use multi-cloud

What are somethings to worry about when migrating data?

Cost, time, tools, security

What are the 3 storage formats of data?

Block, file, object

What is block storage?

Fast, efficient way to store data

What is file storage (storage format)?

Uses computer fs, simple, not scalable

What is object storage?

Efficient for reading not writing, very scalable

What are 3 things you must consider for cloud migrations?

Bandwidth, availability, security