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Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

Assumption A first-degree direct LinkedIn connection implies that the two parties know each well. Problem Using this assumption, two unconnected LinkedIn users attempt to connect via an intermediary. What often happens is that the first degree connections are in fact very weak connections, and thus of no use to the third party attempting to connect via the intermediary. Example I log into LinkedIn and would like an introduction to Brent. I view Brent's profile and notice that his first degree connection, Brian, is also a first degree connection with me. So I ask Brian for an introduction to Brent. Brian responds: "I met Brent few years ago, at a conference, we exchanged business cards and connected on LinkedIn. I don't know him well at all. He probably does not remember me. Sorry, don't think the introduction would be of any use." Solution I suggest that LinkedIn mo... (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)

High Availability, Fault Tolerance and Disaster Recovery in AWS

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 har... (more)

Tutorial: Build a Private Cloud in Twenty Minutes

OpenStack is an open-source cloud framework for building on-demand Infrastructure as a Service. This tutorial in essence distills from this two-page set of instructions for setting up devstack on a single server primarily for use by developers. Hardware I used a DELL 1950 with 8 GB of RAM, internal hard-drives and two 1000 MB NICs. Download and Set Up Ubuntu Download Ubuntu 11.10 from here and burn to DVD Boot the server from the DVD and start the install. I installed the BASE SYSTEM and only one optional package, the OpenSSH Server. I named my server "ubuntu-server" I configured... (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)