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)

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)

Installing OpenStack Keystone (Identity) Service | Part 1

Following my high level description of OpenStack, I now delve in the install of OpenStack This post is a manual install of OpenStack on Centos. Although the steps are detailed here: my experience was that the output of each command results in text strings that are required in subsequent commands. Thus I have colour coded each text string output so that the text can be accurately used in subsequent commands. (This is post one of five; posts  two, three, four and five to follow will detail the install of the... (more)

The Components of Apache Hadoop

What is Hadoop? Following my high-level write-up of Hadoop and Big Data, this article will present each of the components or projects that make up Hadoop with a technical description of each. First, what is Hadoop? Hadoop stores and processes large volumes of a wide variety of data that changes rapidly. It analyses and summarizes the data. For example: census of a city, web page analytics, threat analysis, risk models, network failures, etc. Hadoop is redundant and reliable, powerful and focused on batch processing. Hadoop divides a large data processing job into many smaller tas... (more)

An Open Hybrid Cloud from Red Hat - Live at VMworld 2013, San Francisco

Organizations building out private Infrastructure as a Service clouds and utilizing public cloud infrastructure facing the challenging task of using several interface consoles to manage their infrastructure. One unified console would be ideal to accomplish tasks such as: Capacity management and planning Virtual Machine life-cycle and management Policies to govern access and usage Quota enforcement and usage Chargeback and cost allocation Approval workflows Alerts, reports and a dashboard. Well, three days into my new position at Red Hat, doing Technical Marketing for the Cloud and... (more)