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Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

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 tasks that can be distributed across all the nodes Hadoop comprises two main components: MapReduce: The task to analyse the data and summarize the results HDFS: The distributed file system, on commodity server hardware, that contains the data. On each server there is a task tracker and a data nod... (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)

Overview of the OpenStack Cloud

Overview OpenStack is an Infrastructure as a Service offering. (see my prior post for an explanation of IaaS). OpenStack is an OpenSource project, founded by RackSpace, NASA and others. OpenStack can be deployed as a public or private cloud. The OpenStack projects are: CINDER, GLANCE, KEYSTONE, NOVA, QUANTUM, SWIFT. OpenStack Compute: (NOVA) Project NOVA, or OpenStack Compute, provisions and manages on-demand virtual machines and associated resources: CPU, Memory, Disk and Network. Virtual machines can be started, stopped, suspended, created and deleted, while network options for a ... (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)

Simplified Install of VMware vCloud Director 5.1

VMware vCloud Director is used by organizations wishing to build a private cloud (Infrastructure as a Service - IaaS). The purpose of this guide is to help you set up vCloud. Thus, the guide configures vCloud for local storage and direct-connect networking. Storage and network provisioning is not configured because these are complex configurations requiring a SAN/NAS, vShield Edge Gateway, VXLAN etc most of which are not available in a simple home lab. To understand what IaaS cloud computing is, I offer some blogs I have written and a short video at these links: Introduction to... (more)