AWS EC2

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1) Pricing model

    a) On Demand
    b) Reserved
    c) Spot

2)Enhance Networking

C3, C4, D2, I2, R3, M4

3) EC2 Instance Virtualization

a) HVM -> all
b) PV -> M3, C3


4) Plecment Groups
-a logical groupin of instance in a single AZ
-can't span multiple AZ
-unique name across AWS account
-recomendet application that benefi from low-latancy, high bandwith or best
-instance that support entance network
C3
C4
D2
I2
M4
E3
-existing group cannot be moved into placment group
-cannot merge
-can span pcered VPC but you will not get full - bisection bandwith between instance
-reserved instance supported but not for placment group

https://docs.amazonaws.cn/en_us/AWSEC2/latest/UserGuide/ec2-ug.pdf



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