darrylcauldwell.com On a journey around the datacenter and public cloud.

VMware Certified Advanced Professional - Data Center Virtualization Design

Having passed the VCAP5-DCD exam with little to no studying only eighteen months ago and VCIX6-NV since. All things considered I was pretty confident of doing well in the VCAP6-DCV Design exam, and when I completed exam I was pretty sure I’d passed. To my surprise I failed the exam with a 285, to make matters worse during the drive home I couldn’t fathom in my mind where it had gone wrong. Luckily on readin the score report it highlights the blueprint objectives relating the area’s of weakness. For me that was,

  • Objective 1.2 - Gather and Analyze Application Requirements
  • Objective 1.3 - Determine risks, requirements, constraints and assumptions
  • Objective 3.4 - Determine Appropriate Compute Resources for a vSphere 6.x Physical Design

Here I focus on these three objectives, and how I revisited my study and revision to fill my knowledge gap.

Objective 1.2 - Gather and Analyze Application Requirements

Blueprint Defined Skills and Abilities

  • Gather and analyze application requirements for a given scenario.
  • Determine the requirements for a set of applications that will be included in the design.
  • Collect information needed in order to identify application dependencies.
  • Given one or more application requirements, determine the impact of the requirements on the design.

Resources I used

vBrownBag VCAP6-DCV Design Objective 1.2 with Mark Gabryjelski

Objective 1.3 - Determine risks, requirements, constraints and assumptions

Blueprint Defined Skills and Abilities

  • Differentiate between the concepts of risks, requirements, constraints, and assumptions.
  • Given a statement, determine whether it is a risk, requirement, constraint, or an assumption.
  • Analyze impact of VMware best practices to identified risks, constraints, and assumptions.

Resources I used

vBrownBag VCAP6-DCV Design Objective 1.3 with Rebecca Fitzhugh

Objective 3.4 - Determine Appropriate Compute Resources for a vSphere 6.x Physical Design

Blueprint Defined Skills and Abilities

  • Analyze best practices with respect to CPU family choices.
  • Evaluate NUMA and vNUMA with ESXi hosts and Virtual machines in a given design.
  • Analyze the following in a vSphere design:
    • Enhanced vMotion compatibility
    • Implications of vSMP in virtual machines
    • Transparent Page Sharing (TPS) and large pages
    • Resource overcommitment
  • Based on the service catalog and given functional requirements:
    • Determine the most appropriate compute technologies for the design
    • Implement the service based on the required infrastructure qualities.
  • Determine the impact of a technical design on the choice of server density:
    • Scale Up/Out
    • Auto Deploy
  • Calculate the required number of nodes in an HA cluster based upon host failures and resource guarantees
  • Evaluate the implications of using reservations, limits, and shares on the physical design.
  • Specify the resource pool and vApp configuration based upon resource requirements.
  • Size the following resources appropriately:
    • Memory
    • CPU
    • I/O devices
    • Internal storage
  • Given a constraint to use existing hardware, determine suitability of the hardware for the design.

Resources I used
RAID
vSphere Flash Read Cache aka vFlash
vSphere Flash Read Cache aka vFlash - FAQs VMware Infrastructure Architecitecture Overview

General

Site Recovery Manager Maximums

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