To VAR or not Far Enough

Watching the introduction of VAR into the English Premier League is proving to be a frustrating and contentious user experience. Technology has been introduced to reduce refereeing errors but stops short of embracing innovation. In the current implementation a team stationed in a video operation room checks on-field referee decisions, if that means humans scanning […]

Transformation in a time of Crisis

What does a silicon valley leader do when their company’s groundbreaking technology starts to lose momentum, faced with strong competition, uncertainty in the board room and falling stock prices, would you have the vision to see through the storm to the other side. Steve Jobs set the bar when he turned Apple around, we remember […]

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 […]

vSphere 6 dVS NIOC Bandwidth Control

Bandwidth control methods are changed in vsphere 6 distributed virtual switches with NIOC 3 System Traffic,  Network Resource Pools, Network Shares, Reservations and Limits, Traffic Filtering and Marking, QaS, Cos Tagging, DCSP Tagging, Network Traffic Rules, System Traffic Types, System Traffic Qualifiers, MAC Traffic Qualifiers, IP Traffic Qualifiers, dVS ACLs… The following diagram helps see […]

VCIX6 DCV Design – Exam Preparation Workbook

Trying to keep track of what you have read in preparing for the advanced level design exam is a task in itself. I’ve created a downloadable excel file that contains objectives and hyperlinks as per blueprint 3V0-622 v1.2, published on 4 December 2015       VMware Certified Advanced Professional 6 – Data Center Virtualization […]

virtual machine – measure windows cpu performance when limits are applied

In the previous posts I wrote about virtual machine cpu limits not being exposed to the guest OS. This presents concerns for systems and application admins when investigating performance related issues The example vm has a cpu limit of 750 MHz, though neither the OS or vCenter are triggering alarms. Keep in mind; operating system cpu percentage values […]