Study guide for Microsoft Certification Exam 74-409

May 20, 2014

Veeam are providing a “Free Study Guide for Microsoft Certification Exam 74-409: Server Virtualization with Windows Server Hyper-V and System Center

The guide is a 150 page pdf document that covers the exam objectives in 8 chapters.

You will learn about:

  • Virtual Machine Settings
  • Virtual machine storage
  • Hyper-V Virtual Networks and virtualization networking
  • Implementing virtual machines
  • Managing Virtualization Hosts and Infrastructure
  • Hyper-V Failover Clustering and Failover Clustering Roles
  • Virtual Machine Movement
  • Monitoring and disaster recovery

QUI TACET CONSENTIRE VIDETUR – "He who is silent is taken to agree"

October 4, 2012

I received a tweet that stated “If it’s on you balance sheet, it’s not ‘cloud’” that made me interested.

In an article “If its on you balance sheet, it’s not ‘cloud’” written by George Knox he refers to this and some other quotes in a Forbes article “Buyers Beware “Private Clouds” That Aren’t Clouds at All”written by Dan Woods who in turn quotes Ken Ziegler CEO of Logicworks. There weren’t any references to Ken Zieglers statements so I can’t really comment on those.

I think they are wrong and that the articles are misleading, hence my title to this post.

What strikes me reading those articles are that the word cloud is mentioned around these articles and the writers don’t even stop and explain what the cloud is. NIST, the National Institute of Standards and Technology have made a definition of what cloud computing is. The publication can be read here.

The cloud is the idea of resources delivered transparent to the consumer when they want or need them. There are two main players in the cloud. The consumer, e.g. the user of the service and the function that delivers the resources, the service provider.

The driver of cloud isn’t just economical. I would say that its efficiency driven. Economic parameters like cost savings are not a parameter on which the cloud is built. The cloud can often cut cost but not always. But it will provide efficiency.

Deployment Models for the cloud are:

The public cloud is resources delivered to the many customers which holds consumers who share the resources often via the internet.

The private cloud is delivered to onecustomer what might have many consumers that don’t share the resources with other customers.

The customer is either a person or an organization of some kind.

NIST also states a few other

The cloud consists of three service models or building blocks:

1. Software as a Service, (SaaS)

2. Platform as a service, (PaaS)

3. Infrastructure as a Service, (IaaS)

Software as a Serviceis something you subscribe to and can use right away with minor configuration for instance providing your name and password for your e-mail.

Platform as a Serviceon the other hand is a service on which you put data, for instance your website. Another way of using PaaS is your dev/test environment. This service needs a higher level of configuration to be operational but pretty much is preconfigured.

Infrastructure as a Service can be described as delivery of infrastructure objects like servers, storage and networks. To use this service you need extensive configuration to get your infrastructure operational.

These building blocks or service models are delivered to the customer with five essential characteristics.

On-demand self-service. A consumer can order the resources without direct interaction with the people involved in provisioning of the resources. Like ordering things in a web shop.

Broad network access. The user can access the resouces from various clients, laptops, smartphones, workstations etc.

Resource pooling. The computing power are pooled and shared by the consumers like on a file/printserver where varous consumers share the same system for storing files and printing documents.

Rapid elasticity. The computing resources will increase quickly to changes. During high peak times more power are provided to the service and returned when there not needed anymore.

Measured service. The resources used by a consumer is measured and reported. The reports are transparent for the consumer and the service provider, a pay per use way of thinking.

The cloud is all about the app and the app is all about collaboration.

It takes two to tango