cloud test 1002i

1. Cloud Overview Architecture, Performance, Support

2. Architecture of the EC2 Many operating systems on one machine Systems that constantly measure performance (hypervisors) Amazon Devpay: It’s easy to charge 3rd parties for the use of your services in the cloud.

3. Architecture of EC2 consolidation rapid provisioning dynamic fault tolerance against software failures through rapid reboots hardware fault tolerance through migration of a virtual machine to different hardware

4. Architecture of EC2 Disadvantages: No physical access to the machine Can meet HIPAA security standards but requires more work than physical boxes

5. Performance Can achieve greater levels of performance not possible for physical boxes. E.G. It’s possible to deploy a virtualized single CPU 5ghz machine… even though 5ghz chips do not as of yet exist In every day use, performance is comparable to physical boxes. A 1ghz CPU with 1GB of RAM virtual performs the same as a real box.

6. Performance Caveat: Writing to EBS is a bit slower than writing to SSDs with an IO of 800mb/s but EBS is safer than disk because of redundancy. How safe is EBS? 0.1% - 0.5% failure rate of a volume whereas commercial physical disk fails at a rate of 4%

7. Support Forums Silver – 10% of your AWS bill Gold – 20% of your AWS bill

8. Forums Support in Forums is user generated User generated advice can be wrong

9. Silver Support During Business Hours (6am – 6pm PDT) Ticketed Support

10. Gold Everything that silver offers plus: 24x7 Support Phone support