Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

In this posting, I summarize my prior three posts on the three cloud computing offerings: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). I concentrate how the three offerings differ with respect to flexibility, maintenance and portability. One of the greatest challenges companies face when moving to the cloud is security. Thus I will devote an entire blog post in the future, to security concerns. Flexibility How much flexibility do you have with each offering? What can you change or modify within each cloud offering to suit your needs? Can you modify the software, the look-and-feel, the branding, the hardware even the source code with each cloud offering? Maintenance How much do you need to maintain with each cloud offering? Do you need to hire programmers, data analysts, system administrators or just application... (more)

Cloud Computing Easily Understood - SaaS

In prior blog posts, I described Infrastructure as a Service (IaaS) and Platform as a Service (PaaS). To recap: If I use IaaS I get servers onto which I can load software and applications which I then maintain, though I don't need to maintain the hardware. I can customize the applications and software running on the servers, at will. If I use PaaS, I get a platform of ready to use web servers, application servers, databases etc. I write my own software application and host it at the PaaS provider. I maintain the software I write, but not the application servers, databases or ha... (more)

AWS - Amazon Web Services - for Newbies

This blog post is a summary of AWS (Amazon WebServices and is gleaned from Jeff Barr's webcast, here: http://youtu.be/CaJCmoGIW24). I will simply explain each box in the above picture, at a high level, and explore further in future blog posts as I delve further into AWS. (AWS is an abbreviation for Amazon Web Services) Amazon Global Physical Infrastructure AZ - Amazon zone - When you create an Amazon instance, you can select a region for your instance - USA, Eerope, AsiaPacific, Government/Federal. Separated zones - provided to allow for separate datacenters, power cooling and hig... (more)

Architecting for the Cloud Using Amazon Web Services

Traditional IT environments that are built using physical servers can only scale and grow by buying new hardware and software and taking time to install and rack the hardware, configure the software and the application. If/when the excess capacity is not needed the servers stand idle consuming power, cooling and rackspace. This is inefficient and a waste of money. Amazon Web Services (AWS) allows customers to scale using elastic demand. Just like a rubber elastic band stretches to accommodate more items , AWS provides elastic computing to allow a customer to scale up (or down); to... (more)

The Key to Effective Demonstrations of a Technology Solution

Have you ever been invited to present a product solution and within a few minutes the audience is thumbing on their mobile devices? Have you ever presented to a remote audience and asked the end "any questions?" and there are none? Here are some tips for giving a great demo. (Credit to this material goes to Peter Cohan of The Second Derivative who presented this material at a workshop I attended and have me permission to write a summary) What is a bad demo? "Let me show this awesome product and all its cool features." What is a good demo? Presentation of specific product functions ... (more)