Hybrid Infrastructure

1. Describe the difference between a locally hosted service (ie. in an enterprise data centre) and a service provided using an SaaS provider. What are the critical points, other than cost, that an enterprise would need to consider in choosing to migrate from a locally hosted service to an SaaS service. Your description should take no more than two to 3 pages. 2. Describe the difference between locally hosted infrastructure (ie. in an enterprise data centre) and infrastructure provided using an IaaS provider. What are the critical points, other than cost, that an enterprise would need to consider in choosing to migrate from local hosted infrastructure to an IaaS service provider. Your description should take no more than two to 3 pages. 3. DTGOV, the department in our case study, wants to investigate moving to a service based model where many of its services would be supplied to its clients as a service, in addition to its plans to move to an IaaS model (See the DTGOV Roadmap and Implementation Strategy (Erl, Mahmood, & Puttini, 2013, p. 19)). There are a number of infrastructure models that could possibly be used to achieve this. Some of these models are: 1. Local hosted infrastructure and applications; 2. Local hosted infrastructure with some SaaS applications; 3. Hybrid infrastructure (some locally hosted infrastructure with some IaaS) and applications; 4. Hybrid infrastructure and applications with some SaaS applications; 5. Full IaaS model with some with SaaS apps; 6. Full SaaS model. for reference see this assignment.

DTGOV, the department in our case study, wants to investigate moving to a service based model where many of its services would be supplied to its clients as a service, in addition to its plans to move to an IaaS model (See the DTGOV Roadmap and Implementation Strategy (Erl, Mahmood, & Puttini, 2013, p. 19)). There are a number of infrastructure models that could possibly be used to achieve this. Some of these models are: Local hosted infrastructure and applications; Local hosted infrastructure with some SaaS applications; Hybrid infrastructure (some locally hosted infrastructure with some IaaS) and applications; Hybrid infrastructure and applications with some SaaS applications; Full IaaS model with some with SaaS apps; Full SaaS model. You are required to choose an infrastructure model that you think will achieve the DTGOV Roadmap; Describe the benefits and drawbacks, excluding costs, of your chosen infrastructure model. Your description should take no more than two to 3 pages. Rationale his assessment will cover the following objectives: Be able to compare and evaluate the ability of different Cloud Computing Architectures to meet a set of given business requirements; Be able to evaluate a set of business requirements to determine suitability for a Cloud Computing delivery model; Marking criteria Marking Criteria Question Marks Question 1 - Services 10 Question 2 - Infrastructure 10 Question 3 - a. Infrastructure model 15 Question 3 - b. Benefits & drawbacks 15 Total 50 Spelling, grammar & presentation (up to -5 marks) Referencing (up to -5 marks) Assessment Rubric Question HD DI CR PS FL Q1 - Services Clear, comprehensive description of service differences, critical points identified & discussed Detailed description of service differences, critical points identified & discussed, Good description of service differences, some critical points identified & discussed, Adequate description of service differences, some critical points identified Incomplete or inadequate description of service differences, none or few critical points identified Q2 - Infrastructure Clear, comprehensive description of infrastructure differences, critical points identified & discussed, Detailed description of infrastructure differences, critical points identified & discussed, Good description of infrastructure differences, some critical points identified & discussed, Adequate description of infrastructure differences, some critical points identified Inadequate or incomplete description of infrastructure differences, none or few critical points identified Q3a Infrastructure Model Clear & comprehensive description of infrastructure model choice and reasoning Detailed description of infrastructure model choice and reasoning Good description of infrastructure model choice with some reasoning Adequate description of infrastructure model choice with limited reasoning Inadequate or incomplete description of infrastructure model choice with no reasoning Q3b Benefits & Drawbacks Clear & comprehensive description of infrastructure benefits and drawbacks with reasoning Detailed description of infrastructure benefits and drawbacks with reasoning Good description of infrastructure benefits and drawbacks with some reasoning Adequate description of infrastructure benefits and drawbacks with limited reasoning Inadequate or incomplete description of infrastructure benefits and drawbacks with no reasoning Spelling, Grammar, Presentation Up to 5 marks may be deducted for poor presentation, spelling and grammar APA referencing Up to 5 marks may be deducted for not providing or following the proper APA style of referencing.