Virtualization and Cloud

Jonathan Gershater

Subscribe to Jonathan Gershater: eMailAlertsEmail Alerts
Get Jonathan Gershater: homepageHomepage mobileMobile rssRSS facebookFacebook twitterTwitter linkedinLinkedIn


Latest Blogs from Jonathan Gershater
At VMworld 2013, VMware announced vSphere 5.5. How does this new release compare to Red Hat Enterprise Virtualization (RHEV)? If an organization just wants to gain the benefits of virtualization and ease of management, do they need all this extra "stuff", paying for features never use...
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 man...
I previously wrote a review of the Microsoft Azure public cloud and included a comparison between Azure and AWS (Amazon Web Services) and will now compare OpenStack and VMware vCloud. For a review of IaaS (Infrastructure as a Service) see my blog post and video. This table provides a...
Following my single server installation of RDO OpenStack using PackStack, here is my install of OpenStack across three nodes. What's key here is the answer files used with packstack. For a single node its trivial since you just accept nearly all the defaults. A distributed install re...
OpenStack is easily installed using a package called Packstack. Redhat is one of the primary contributors to packstack and my install experience is similar to the installation of RDO, described here The procedure is quite simple: Install Redhat, Fedora or Centos on one or more x86 se...
Following my initial introduction to Hadoop and overview of Hadoop components, I studied the Yahoo Hadoop tutorial, and have a deeper understanding of Hadoop. I would like to share my learning and help others understand Hadoop.
Joe McKendrick reviews Jason Bloomberg's new book and posits that public cloud is better than private cloud and he provides twelve very valid reasons. Yes, the debate is fierce between private and public..... security, cost, control, compliance In response, here are my twelve reasons...
This blog post details how to install the OpenStack keystone (identity) service - first of five posts. 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:...
This blog post distills critical information from VMware to help with an evaluation of VMware vCloud Director. 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....
While a public cloud provider, like Amazon, secures the datacenter and network, application owners are still responsible for securing their applications and virtual machines (instances). When you host applications in the public cloud, you assume partial responsibility for securing th...
As a follow up to my article on Infrastructure as a Service, here is a four minute video:
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 inc...
Using Amazon web services for elasticity and scale to build cloud applications. 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 th...
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. I used a DELL 1950 with 8 GB of RAM, in...
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 th...
This blog post is a summary of AWS (Amazon WebServices and is gleaned from Jeff Barr's webcast. 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....
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 portab...
This blog post provides a concise and easy to understand description of Plaform as a Service, one of the cloud computing delivery models. These applications are thus platform specific. An application written/purchased to run on Windows, Unix or Linux, within the IaaS environment, is d...
This blog post describes Software as a Service, one of the cloud computing delivery platforms. 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 ...
An understanding of IaaS, Infrastructure as a Service, one of the three delivery methods of cloud computing. Infrastructure as a Service is one of the three delivery methods of cloud computing (the other two are Platform as a Service and Software as a Service). Users of IaaS have the...
This posting provides an introduction to cloud computing: concepts and terminology. 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 ca...