AZ-900:Describe cloud concepts ③

AZ-900の試験を英語で受けるに至り、翻訳なしで勉強をしてまとめていく勉強ノートです。

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学習内容

*Intro to cloud computing: Describe the consumption-based model

• 学習内容
• Describe the consumption-based model
  - CapEx
  - OpEx
• Compare cloud pricing models
• Check list:

Describe the consumption-based model

Two types of expenses to consider when comparing IT infrastructure models:

• Capital expenditure (CapEx)
• Operational expenditure (OpEx)

CapEx

One-time, up-front expenditure to purchase or secure resources
Examples:

• building a datacenter
• buying a company vehicle

OpEx

Ongoing expenditure over time on services or products
Examples:

• signing up for cloud services
• renting a convention center
• cloud computing
  • operates on a consumption-based model
    • no need to pay for physical infrastructure
    • instead need to pay for the IT resources the consumer uses: no need to pay for a month that the IT resources are not used.

Benefits:

• No upfront costs.
• No need to purchase and manage costly infrastructure that users might not use to its fullest potential.
• The ability to pay for more resources when they're needed.
• The ability to stop paying for resources that are no longer needed.

Cons of CapEx(traditional data center) that consumers doesn't have to worry anymore in a cloud-based model:

• esitimation of future resource needs lead consumers to waste money / suffer from overestimating / underestimating.
• time consuming when fixation is needed: ordering, receiving, installing hardware... adding power, cooling, and networking for the extra hard ware.

Compare cloud pricing models

Cloud computing:

• Delivery of computing services over the internet
• uses a pay-as-you-go pricing model, thus consumers pay only for cloud services they use.
  • helps plan and manage operating costs
  • helps run infrastructure more efficiently
  • helps to scale as bussiness needs change.
  • no need of maintaining CPUs and storage as consumers only have to rent when needed.
  • cloud provider takes care of maintaining the underlying infrastructure

Check list:

by now, can you...

• Define cloud computing.
• Describe the shared responsibility model.
• Define cloud models, including public, private, and hybrid.
• Identify appropriate use cases for each cloud model.
• Describe the consumption-based model.
• Compare cloud pricing models.

If yes, way to go!
If no, try reviewing.

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AZ-900:Describe cloud concepts① はこちら：

AZ-900:Describe cloud concepts② はこちら：

AZ-900:Describe cloud concepts④ はこちら：

AZ-900:Describe cloud concepts⑤ はこちら：

AZ-900:Describe cloud concepts⑥ はこちら：

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AZ-900:Describe cloud concepts⑧ はこちら：

AZ-900:Describe cloud concepts⑨ はこちら：