Objective 2.1 –Map Business Requirements to the Logical Design
· List the fundamental components of the vSphere4 environment.
· List the fundamentals of the VMware virtualization architecture.
· List the phase of logical design.
· List the detailed steps that go into the makeup of a logical design.
Skills and Abilities
· Define a logical design.
· Apply the detailed steps that go into the makeup of a logical design to a particular customer environment.
· Distinguish between a logical and physical design.
· Given a situation, translate given business requirements and the current state of a customer environment into a logical design.
The logical design includes the relationships between all major infrastructure components, while considering:
• The conceptual design
• Constraints and risks
The logical design is useful for understanding and evaluating the design of the infrastructure.
• Does it meet the goals and requirements, while staying within the constraints?
The logical design does not include physical details:
• For example, vendor models, host names, IP addresses, and port connections
The logical design is based on the information documented in the conceptual design and considers all constraints and risks. Where there are risks, they should be communicated to the organization along with a recommended action, so that a decision can be made and the design can move forward.
Use the logical design to create the physical design.
A physical design includes specific vendor and implementation details:
• Vendor models, host names, IP addresses, port connections, LUN sizes, number of CPUs, and other specific physical details
In the end, a good design:
• Involves the organization’s key stakeholders and SMEs
• Balances business goals and requirements with technical considerations and best practices
• Has documented rationales and considerations
• Includes enough detail to be unambiguous
• Is not unnecessarily complex
• Is repeatable
At the beginning of any design project you need to develop a high level vision for the project. This high-level vision includes the project
scope, goals, requirements, assumptions, and constraints.
The conceptual design focuses on achieving the organization’s business goals and requirements.
The logical design includes the relationships between all major infrastructure components and is useful for understanding and evaluating the design of the infrastructure.
A physical design includes specific vendor and implementation details.
Design criteria should include usability, manageability, security, and cost.
Educate key stakeholders and SMEs about vSphere and virtualization so that they can provide valuable input during the design project.
Designing is a balancing act between technical best practices and the organization’s goals, requirements, and constraints.
Objective 2.2 – Map Service Dependencies
· Identify basic service dependencies for infrastructure and application services.
Skills and Abilities
· Analyze service dependencies to determine requirements for the logical design of a multi site environment.
· Identify the upstream/downstream service dependencies.
· Having navigated logical components and their interdependencies, make decisions based upon all service relationships.
Depending on the project, the optional installation and configuration document might include only high-level steps for implementing the design. On the other hand, the document might include step-by- step procedures for implementing the design. The level of detail typically depends on the cost of the project and whether the design is product-oriented or solution-oriented. A solution-oriented project typically includes more details specific to an organization’s needs.
In either case, these documents can refer to online VMware documentation for detailed step-by-step instructions as necessary. Assume that the reader is familiar with basic vSphere operation.
At a minimum, these documents should include the products listed above.