Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

Amazon Web Services – Disaster Recovery, High Availability and Fault Tolerance Abbreviations used: AWS - Amazon Web Services AMI - Amazon Machine Instance DR - Disaster Recovery FT - Fault Tolerance HA - High Availability Non-technical introduction. High Availability and Fault Tolerance – the requirement that a computer application be seemlessly available to users without interruption, literally “no (or very little) fault will be tolerated”. In simple speak, this means that I am able to use a computer application even though in the background there may be outages, for example hardware failure, network congestion or maximum CPU utilization.  The application is “highly available”, it  is available “(almost) all the time.” Disaster Recovery – what it takes for your organization to recover from a computer disaster and be operational again. Simple example: suppose a har... (more)

How to Deliver Compelling Presentations

Following up on my prior article, how to deliver effective demos, here are some guidelines how to deliver effective presentations. This is a summary of an excellent seminar I attended, given by Tom Sant of Hydeparkpartnerscal We have all sat through PowerPoint presentations crammed with text in 10point font which the presenter often just reads; within a few minutes most of the audience are thumbing their mobile devices or engaged with their laptops. So, in the age of five minute attention spans, how do we keep our audience engaged? Avoid this pitfall:  Do not start the presentatio... (more)

Introduction to Cloud Computing for Newbies

Cloud computing is a general term for computing services delivered over the Internet, as opposed to computing services hosted inside your own network; on your own premises. These computing services can be as simple as Internet based email or as complex as a Customer Relationship Management (CRM) application. Cloud computing offers cost savings, because users don't have to invest capital budget to purchase hardware and software, nor expend the operating costs of electric power, space and cooling for the hardware and employee costs of maintaining the hardware and software. The maj... (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)

Identity Management Requirements for the Public Cloud

The Security for Cloud Computing: 10 Steps to Ensure Success white paper provides a practical reference to help enterprise information technology (IT) and business decision makers as they analyze and consider the security implications of cloud computing on their business. The paper includes a list of steps, along with guidance and strategies, designed to help these decision makers evaluate and compare security offerings in key areas from different cloud providers. The paper discusses the threats, technology risks, and safeguards for cloud computing environments, and provides the ... (more)