Virtualization and Cloud

Jonathan Gershater

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Top Stories by Jonathan Gershater

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 grow or shrink their architecture quickly efficiently with minimal intervention. The following is a summary of an AWS whitepaper and webinar that describes how you can use AWS to architect your system for the cloud. Concepts/Definitions AWS EC2 - an elastic cloud computing platform that all... (more)

Hadoop Deep Dive: HDFS and MapReduce

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. Why does Hadoop require HDFS, what's wrong with NFS? Normal 0 false false false EN-US JA X-NONE Nothing! NFS been around for years and is incredibly stable. A distributed file system, such as NFS, provides the functionality required for servers to share files. It does this by exposing a volume to the network, which users connect to over the TCP/IP proto... (more)

Four Minute Lesson on Infrastructure as a Service

As a follow up to my article on Infrastructure as a Service, here is a four minute video: http://www.youtube.com/watch?v=q6u-KkD53_Y   ... (more)

Three Node Install of RDO OpenStack Using PackStack

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 requires a bit of planning. First I installed on two nodes, using packstack from one node (sudo packstack --answer-file=/root/grizzly_openstack.cfg) The answer file for this installation is here, it specifies the location of each component: cinder on one server (.110) with this line: # The IP address of ... (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)