CPSC 4820 - DAY 15
APRIL 5, 2018

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Reliability
-----------

The ability of a system to recover from infrastructure or service failures

Automatically recover from failure
scale horizontally
stop guessing capacity

RTO - Recovery time objective
RPO - Recovery point objective

Performance
-----------

The ability to use computing resources efficiently to meet system requirements
and to maintain that efficiency as demand changes and technologies evolve

Democratize advanced technologies

Go global in minutes

Use serverless architectures

Experiment more often

Mechanical sympathy


	+----------------+-----------------+-----------------+----------------+
	| Instance 	 | Amazon EBS	   | Amazon S3	     | Amazon Glacier |
	| Store		 | 		   | 		     |  	      |
	+----------------+-----------------+-----------------+----------------+
Avg	|	ms	 | 	ms	   | ms, sec, min    |	hrs	      |
Latency |		 | 		   |		     |		      |
	+----------------+-----------------+-----------------+----------------+
Data    | 4GB- 48TB	 | 1GiB - 16 TiB   | No limit	     | No limit	      |
Volume  | 		 | 		   |		     |		      |
	+----------------+-----------------+-----------------+----------------+
Item	| Block Storage  | Block Storage   | 5TB Max	     | 40 TB Max      |
Size	|		 |		   |		     |		      |
	+----------------+-----------------+-----------------+----------------+
Request | Very High	 | Very High	   | Low - Very High | Very Low	      |
rate	| 		 | 		   | 		     | 		      |
	+----------------+-----------------+-----------------+----------------+
Cost/GB | Amazon EC2	 | higher	   | lower	     | lower 	      |
per mth | instance cost  | 		   |		     |		      |
	+----------------+-----------------+-----------------+----------------+
Durable | Low		 | High		   | Very High	     | Very High      |
	|		 |		   |		     | 		      |
	+----------------+-----------------+-----------------+----------------+