1.
Cloud Migration Patterns: A Multi-Cloud
Architectural Perspective
Pooyan Jamshidi
Supervisor: Dr. Claus Pahl
IC4- Irish Centre for Cloud Computing and Commerce
School of Computing, Dublin City University
Pooyan.jamshidi@computing.dcu.ie

2.
Source: cloudtweaks.com
P. Jamshidi, A. Ahmad, C. Pahl, "Cloud Migration Research: A
Systematic Review", IEEE Transactions on Cloud Computing,
2013, DOI:10.1109/TCC.2013.10.

3.
Stairway to Heaven: An Architecture-Level Characterization of
Cloud Migration Strategies
Application Migration Patterns for the Service Oriented Cloud

4.
N. Grozev and R. Buyya. Inter-cloud architectures and
application brokering: taxonomy and survey. Software:
Practice and Experience,

5.
The Multi-Cloud Deployment is effective in dealing
with the following challenges:
• Users are not clustered near any single data center,
but form clusters around multiple data centers or are
widely distributed geographically
• Regulations limit options for storing data in specific
data centers
• Circumstances require that the public cloud be used
in concert with on-premises resources
• Application must be resilient to the loss of a single
data center

6.
Azure incident that I personally experienced
…And it lasted for 6 odd hours!

7.
…And it happened again in the
evening on the same day!

8.
We do not intend to provide cloud application
architectural patterns. We rather abstract these
architectural layers into general concept of
components and connectors. The reason behind this
choice is that we have numerous cloud
architectures that becomes orthogonal to the
migration patterns and just add more ambiguity
into that.
Looking for cloud
application architecture?
Read these books

9.
Objective MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 MP9 MP10 MP11 MP12 MP13 MP14 MP15
Time to market -- -- -- -- --
New capabilities -- -- -- --
Reduce operational cost -- -- -- -- -- --
Leverage investments -- -- --
Free up on-premise resources
Scalability -- -- -- -- -- -- --
Operational efficiency -- -- -- -- -- -- -- --
Re-host
Cloudification
Relocation
Refactor
Rebinding
Replacement
Modernization

10.
Objective MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 MP9 MP10 MP11 MP12 MP13 MP14 MP15
Time to market -- -- -- -- --
New capabilities -- -- -- -- --
Reduce operational cost -- -- -- -- -- -- --
Leverage investments -- -- -- -- -- --
Free up on premise resources
Scalability -- -- -- -- -- -- --
Operational efficiency -- -- -- -- -- -- -- --

11.
Objective MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 MP9 MP10 MP11 MP12 MP13 MP14 MP15
Time to market -- -- -- -- --
New capabilities -- -- -- -- --
Reduce operational cost -- -- -- -- -- -- --
Leverage investments -- -- -- -- -- --
Free up on premise resources
Scalability -- -- -- -- -- -- --
Operational efficiency -- -- -- -- -- -- -- --

12.
P. Jamshidi, A. Ahmad, C. Pahl, "Cloud Migration Research: A Systematic Review", IEEE Transactions on Cloud
Computing, 2013, DOI:10.1109/TCC.2013.10.
Migration patterns
Primarily facilitate
planning
Enable Auto-Deployment of
Multi-Tier Systems
in Hybrid Cloud Environment

13.
Application Architecture (on-premise deployment)

14.
Migration
Step
Requirement
Chosen
Patterns
1 Minimal code changes to application and familiarity with platform MP1
2 Granular control of resource usage and opportunity for auto-scaling MP6
3 Lower cost although some limitations on feature availability MP13
4 Replacing on-premise storage with cloud offerings MP12
5 Integration with cloud utility services MP14
6 Highly available service replacement MP11
7 Better user experience, improved efficiency, and load leveling MP3

15.
Concern: Minimal code changes to application and
familiarity with platform
Selected pattern:
MP1

16.
Concern: Granular control of resource usage and
opportunity for auto-scaling
Selected pattern:
MP6

17.
Concern: Lower cost although some limitations on
feature availability
Selected pattern:
MP13

18.
Concern: Replacing on-premise storage with cloud
offerings
Selected pattern:
MP12

19.
Concern: Integration with cloud utility services Selected pattern:
MP14

20.
Concern: Highly available service replacement Selected pattern:
MP11

21.
Concern: Better user experience, improved
efficiency, and load leveling
Selected pattern:
MP3

22.
Incremental migration
New functionalities by cloud offerings
Hybrid deployment
Multi-tenant architectures
Elastic software
SaaS

23.
On-Premise Deployment
Multi-Cloud Deployment

24.
Concern: Minimal code changes to application and
familiarity with platform
Selected pattern:
MP1

25.
Concern: Granular control of resource usage and
opportunity for auto-scaling
Selected pattern:
MP6

26.
Concern: Granular control of resource usage and
opportunity for auto-scaling
Selected pattern:
MP6

27.
Concern: Enhancing availability without
architecture evolution and capital expenditure
Selected pattern:
MP4

28.
Concern: solution is improved though best-in-
class cloud services
Selected pattern:
MP12

29.
Concern: loose-coupled integration with cloud
utility services and re-hosted components
Selected pattern:
MP8

30.
Concern: better user experience, improved
efficiency, and load leveling
Selected pattern:
MP3, MP6

31.
Concern: business expansion and BPaaS
Selected pattern:
MP15

32.
Incremental migration
Business expansion
Hybrid deployment
Multi-tenant business processes
Elastic business processes
BPaaS

33.
The Message!

34.
Pooyan.jamshidi@computing.dcu.ieI would be grateful to receive your thoughts on this: