Overview of Amazon Web Services

1. AWS 已经有90多个服务了。

2. Six Advantages of cloud computing

    a. trade captial expense for variable expens

    b. beneift from massive economies of scale

    c. stop guessing about capacity

    d. increase speed and agility

    e. stop spending money running and maintaining data centers

    f. go global in minutes.

3. Types of Cloud computing

    与之前的区别是AWS开始承认IaaS/PaaS/SaaS的区别，同时对Cloud/Hybrid/On-premises 做了介绍，不再只强调Cloud的一个词了。

4. Global Infrastructure

     2018.1.12日， AWS 云在全球 18 个地理区域内运营着 49 个可用区，并宣布计划增加巴林、中国香港特别行政区、瑞典和美国第二个 AWS GovCloud 区域这四个地区，同时再增加 12 个可用区。（超过190个国家）

6. Security and Compliance

     The AWS Cloud enables a shared responsibility model.

     Benefits of AWS Security: Keep your data safe, aws提供高安全性数据中心。Meet Compliance requirements。  Save money。Scale Quickly。

7. Compliance

8. EC2 SLA 99.95%

9. EC2 Dedicated instances和Dedicated Hosts 区别

Dedicated instances定价

https://aws.amazon.com/cn/blogs/aws/amazon-ec2-dedicated-instances/

Pricing
      When you launch a Dedicated Instance, we can’t use the remaining “slots” on the hardware to run instances for other AWS users. Therefore, we incur an opportunity cost when you launch a single Dedicated Instance. Put another way, if you run one Dedicated Instance on a machine that can support 10 instances, 9/10ths of the potential revenue from that machine is lost to us.

      In order to keep things simple (and to keep you from wasting your time trying to figure out how many instances can run on a single piece of hardware), we add a $10/hour charge whenever you have at least one Dedicated Instance running in a Region. When figured as a per-instance cost, this charge will asymptotically approach $0 (per instance) for customers that run hundreds or thousands of instances in a Region.

这篇Blog是2011年的，现在定价为启动dedicated实例 2$/hour.