1. Ashwinee Kumar
June 2015
Cloud Infrastructure
Ecommerce Series – Part 2

2. 2
Agenda
1. Cloud services
2. Scaling infrastructure - Provisioning

3. CAPEX Vs OPEX
3

4. Types of Cloud deployment
4
1. Public
2. Private
3. Hybrid

5. Deployment Models
5

6. Public vs Private Cloud
6

7. Types of Cloud service models
7
1. IaaS
2. PaaS
3. SaaS

8. Cloud Service
8
For a resource to be part of cloud service
 Metered
 Elastic
 On demand

9. Ownership of Infrastructure
9

10. Scaling the Infrastructure
10

11. Business season
11
“Almost a third of British online shoppers experienced problems with their orders over the Christmas
period” - 2014
 What happens on black Friday, cyber Monday, singles day etc… ?

12. Provisioning
12
 Static Provisioning – Add infrastructure before the season based on historical data
 Auto Provisioning – Add infrastructure at run time
1. Scale up (Vertical scaling) – increase capacity of individual node, code efficiency, cache
1. Hardware and infrastructure focused
2. Scale out (Horizontal scaling) – add additional nodes
1. Development and architecture focused
3. Hybrid – Scale up + Scale out

13. Wondering?
13
2. How much to scale ?
Answer: Scaling Unit – Combination of resources that needs to be scaled together
Eg.. for every 100 users, we may need 2 web server nodes, one application
service node, and 100 MB of disk space
1. Why do scalability issues occur ?
Answer: Software is either consuming more resources than they should be or
demand for your software has increased

14. Limitation of Provisioning in Traditional IT
14
Limitations
 Static provisioning – could lead to under or over utilization
 Scaled for peak – grossly underutilized
 Load test methodology – Gradual ramp based while it is rapid burst in reality
 Time spent building infrastructure which is better spent on core business

15. Scaled for peak - example
15

16. Load Test
16
Gradual Ramp up based Load test
Rapid Burst in reality