AZ-900:Describe cloud concepts ⑤


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。

自身の復習用としても記事を書くつもりではありますが、同じように英語で受講予定＆翻訳なしでそのまま英語で勉強した方がやりやすい方の参考に少しでもなることが出来ればと思います。

日本語で勉強をしたい方は、こちらのサイトを是非参考にしてみてください：
Azure Fundamentals(AZ-900)：クラウドの概念について説明する

https://qiita.com/fsd-jume/items/592be27a2e3c3f9ee4c9


# 学習内容
Describe the benefits of using cloud services
Describe the benefits of reliability and predictability in the cloud

- [学習内容](#学習内容)
- [Reliability](#reliability)
- [Predictability](#predictability)
  - [Performance Predictability](#performance)
  - [Cost Predictability](#cost)

**Importance of learning** about reliability and predictability:
These are the crucial cloud benefits that help developing solutions.

<a id="#Reliability"></a>
# Reliability

* The ability of a system to recover from failures and continue to function.
* One of the pillars of Azure Framework

**Decentralization** -  process of shifting control from one main group to several smaller ones.

**resilient** - able to withstand or recover quickly from difficult conditions.

Cloud is decentralized, thus naturally supports reliable and resilient infrastructure.
This enables customers to…
* have resources deployed in various locations around the world
	* Even if a service stops from error, there will be ones that are still up and running.
* Cloud environments automatically shift to a different region in some cases. 

<a id="#Predictability"></a>
# Predictability

Can be focused on 
* performance predictability
* cost predictability

Both are heavily influenced by the Azure Well-Architected Framework

<a id="#Performance"></a>
## Performance Predictability

Focuses on…
*  predicting resources needed to deliver a positive experience for consumers’ customers.

<br>

Ex:
* autoscaling
	* Can deploy additional resources when consumers suddenly need more resources automatically.
	* Can sale back when demand drops automatically.
* load balancing
	* Help redirect traffics focused on one area to less stressed areas
* high availability
    * Explained in the last article:

https://qiita.com/fsd-lukapyon/items/90ed9d652da29f19f06e


<a id="#Cost"></a>
## Cost Predictability

Focuses on…
*  predicting or forecasting the cost of cloud spend.

The cloud can…
* track resource use in real time
* monitor if resources are used in the most efficient way
* find patterns and trend that help better plan resource deployments 
	* uses cloud analytics and information

Estimates of potential cloud spend can be obtained…
* Tools
* Total Cost of Ownership (TCO)
* Pricing Calculator


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AZ-900:Describe cloud concepts① はこちら：

https://qiita.com/fsd-lukapyon/items/0100596156d3abc7808e

AZ-900:Describe cloud concepts② はこちら：

https://qiita.com/fsd-lukapyon/items/99edd38b566f6ed0d096

AZ-900:Describe cloud concepts③ はこちら：

https://qiita.com/fsd-lukapyon/items/0324140f0b6c2034db68

AZ-900:Describe cloud concepts④ はこちら：

https://qiita.com/fsd-lukapyon/items/90ed9d652da29f19f06e

AZ-900:Describe cloud concepts⑥ はこちら：

https://qiita.com/fsd-lukapyon/items/6b5e612044dd37b42386

AZ-900:Describe cloud concepts⑦ はこちら：

https://qiita.com/fsd-lukapyon/items/83390ae397ff8e7b8989

AZ-900:Describe cloud concepts⑧ はこちら：

https://qiita.com/fsd-lukapyon/items/abfc398d55bf28160b90

AZ-900:Describe cloud concepts⑨ はこちら：

https://qiita.com/fsd-lukapyon/items/4881ce9db481dd4173eb