AWS AMI/AKI/ARI之介紹

AMI (Amazon Machine Image) This is a virtual machine image in raw format, as
described above.
AKI (Amazon Kernel Image) A kernel file that the hypervisor will load initially to boot
the image. For a Linux machine, this would be a vmlinuz
file.
ARI (Amazon Ramdisk Image) An optional ramdisk file mounted at boot time. For a
Linux machine, this would be an initrd file.

AWS Load-balancer

AWS ELB的使用限制:

You can setup your load balancer to load balance incoming requests across EC2 instances in a single Availability Zone or multiple Availability Zones within a region. Your load balancer does not distribute traffic across regions.

-- AWS ELB可以在某一個Region來平衡一到多個availability zones
-- 但AWS ELB無法跨Region來做負載平衡

Region and Endpoint in AWS

由以下AWS的連結我們可以清楚看到所謂的Region以及Endpoint的定義與實利，而OpenStack本身就是基於AWS的架構概念去開發的

Endpoint

 An endpoint is a URL that is the entry point for a web service. For example, https://dynamodb.us-west-2.amazonaws.com is an entry point for the Amazon DynamoDB service.


http://docs.aws.amazon.com/general/latest/gr/rande.html