AWS_Certified_Cloud_Practitioner认证相关服务说明.docx

辛西娅

26页

0次

2023-12-20

10墨值下载

Six advantages and benefits of cloud computing

● trade capital expense for variable expense

● benefit from massive economies of scale

● stop guessing capacity

● increase speed and agility

● stop spending money on running and maintaining data centers

● go global in minutes

Types of cloud computing

● SaaS: software as a service

● PaaS: platform as a service

● IaaS: infrastructure as a service

AWS global infrastructure

● regions: physical location in the world with multiple availability zones

○ every region is physically isolated from and independent of every other region in

terms of location, power, water supply

○ each region has at least 2 AZs

○ not all services are available in every region

○ US-EAST-1 is the region where you see all your billing information

● availability zones: one or more discrete data centers

○ AZs are represented by a region code, followed by a letter identifier: US-EAST-

○ Multi-AZ: distributing your instances across multiple AZs allows failover

configuration for handling requests when one goes down

○ < 10ms latency between AZs

● edge location: datacenter owned by a trusted partner of AWS

○ get data fast or upload data fast to AWS

○ the locations serve requests for CloudFront and Route 53. Requests going to

either of these services will be routed to the nearest edge location automatically

○ S3 Transfer Acceleration traffic and API Gateway endpoint traffic also use the

AWS Edge Network

○ this allows for low latency no matter where the end user is geographically located

GovCloud

● AWS GovCloud Regions allow customers to host sensitive Controlled Unclassified

Information and other types of regulated workloads

● GovCloud Regions are only operated by employees who are US citizens, on US soil

● They are only accessible to US entities and root account holders who pass a screening

process

CloudFront

Relational Database Service (RDS)

Lambda

EC2 - Pricing Model

● On-Demand (least commitment)

○ charged by the hour or by the minute

○ is for applications where workload is for short-term, spikey or unpredictable

● Spot (biggest savings)

○ AWS wants to maximize the utility of those idle servers

○ provide a discount of 90% compared to on-demand pricing

○ can be terminated if the computing capacity is needed by on-demand customers

■ instances can be terminated by AWS at anytime

■ if your instance is terminated by AWS, you don't get charged for a partial

hour of usage

■ if you terminate an instance, you will still be charged for any hour that it

ran

● Reserved (best long-term)

○ pricing is based on Term x Class Offering x Payment Option

○ Offering Class:

■ standard: up to 75% reduced pricing compared to on-demand

■ convertible: up to 54% reduced pricing

■ scheduled: reserve instance for specific time periods, savings vary

○ Term:

■ commit to a 1Year or 3 Year contract

■ the longer the term, the greater savings

○ Payment Options:

■ all upfront

■ partial upfront

■ no upfront

● Dedicated (most expensive)

○ designed to meet regulatory requirements

■ when you have strict server-bound licensing that won't support multi-

tenancy or cloud deployments

○ multi-tenancy

■ multi-tenant

■ when multiple customers are running workloads on the same

hardware

■ virtual isolation is what separate customers

■ single tenant

■ when a single customer has dedicated hardware

■ physical isolation is what separates customers

○ offered in both on-demand and reserved

EC2 pricing - CheatSheet

● EC2 has 4 pricing models On-Demand, Spot, Reserved Instances (RI) and Dedicated

● On-Demand (least commitment)

○ low cost and flexible

○ only pay per hour

○ Use case: short-term, spiky, unpredictable workloads, first time apps

○ ideal when your workloads cannot be interrupted

● Reserved Instances up to 75% off (best long-term value)

○ Use case: steady state or predictable usage

○ can resell unused reserved instances (reserved instance marketplace)

○ reduced pricing is based on Term x Class Offering x Payment Option

○ Payment Terms: 1 year or 3 years

○ Payment Options: All Upfront, Partial Upfront, and No Upfront

○ Class Offerings

■ Standard: up to 75% reduced pricing compared to on-demand. Cannot

change RI attributes

■ Convertible: up to 54% reduced pricing compared to on-demand. Allows

you to change RI attributes if greater or equal in value

■ Scheduled: you reserve instances for specific time periods, eg. once a

week for a few hours. Savings vary

● Spot pricing up to 90% off (biggest savings)

○ request spare computing capacity

○ flexible start and end times

○ use case:

■ can handle interruptions (server randomly stopping and starting)

■ for non-critical background jobs

○ instances can be terminated by AWS at anytime

○ if your instance is terminated by AWS, you don't get charged for a partial hour of

usage

○ if you terminate an instance you will still be charged for any hour it ran

● Dedicated Hosting (most expensive)

○ dedicated servers

○ can be on-demand or reserved (up to 70% off)

○ use case

■ when you need a guarantee of isolate hardware (enterprise requirements)

Free Services

● certain services are free themselves, but the resources they setup will cost you

○ IAM - identity access management

○ Amazon VPC

○ services are free, but they can provision AWS services which cost money

■ Auto Scaling

■ CloudFormation

of 26

10墨值下载

aws practitioner

相关文档

评论