# Category Archives: Uncategorized

## VMware Optimization Assessment and Marginal Gains

Marginal gains theory is again in focus following the Rio Olympics. In sport where the margins between glory and disappointment are so slender, coaches look for opportunities to optimize athletes natural ability through small cumulative changes. For example in preparation for the 2016 games when Team GB coaches noticed that women track cyclists sometimes missed …

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## Last of the betas (vcix6-design)

VCIX-DCV-Design / VCAP6-DCD Beta Exam Experience Only one of vmware’s new vcix/vcap 6 exams was available for public beta, I was able to enrol and took the exam on the final day of beta phase. The expectation is that it will go live in late April/ early May 2016. Exam Preparation Some of the best advice …

## vmware design math – calculate new cluster requirements

design math – calculate new cluster requirements Question 1 Inventory of 100 physical servers 75 Severs with 2 x 2 core 2.5GHZ intel CPU’s 25 Servers with 2 x 4 core 2.5GHZ intel CPU’s 75 Servers with 4GB of memory 25 Servers with 16GB of memory Average peak CPU usage PER CORE on …

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## vmware-design math – calculate vsan requirements

Here’s a math question based on the vsan design and sizing guide Customer wants to deploy 100 virtual machines in a hybrid Virtual SAN 6.0 cluster, disk format v2 Each virtual machine requires 2 vCPU, 8GB of memory and a single 100GB VMDK. Snapshots are not used. Customer expect a vCPU-to-core ratio of 5:1 …

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## vcix-dcv-design math – Get remaining host cpu capacity

Although these are typical question for vmware design exams, (vcap-dcd, vcix-dcv-design) they are fundamental in calculating available capacity given a specific number of tolerable host failures What percentage of cluster resources does your cluster still have to start VM’s in the event of a failure with x admission control reservation. In other words, after setting admission control (see …

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## vcix-dcv-design math – Get admission control percentage

VMware are clear about the importance of setting admission control on vSphere clusters, and the preference of using the percentage calculation where possible A simple formula will help calculate for heterogeneous cluster* For example I have a 12 node vsphere cluster and want to tolerate the loss of 4 hosts 100 / <number of hosts …

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