Change is the only constant. Everything changes and nothing stands still. That is especially true of technology. Many of today’s products will be outdated in a single life cycle. As new features are added at each major release products can be completely transformed within a few short years. Technology vendors pitch themselves as solution providers, …
Continue reading “Using infrastructure qualities to assess new technology”
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 …
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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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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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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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 …
Continue reading “vcix-dcv-design math – Get admission control percentage”
The main point of a security audit is not to try and strangle the auditor, he is just doing his job, although you might think he is there to make your life impossible. I have put together a collection of posts, so you need not fear the dreaded visit of the men in dark suits… …