Recent News

Cloud Computing; Freedom of Choice?

Shortening time to market, increasing transaction volumes, 24 x 7 business, all at lesser costs puts a burden on the information processing of organizations. How should one adapting to the increasing complexity and changes of the organization and its environment? The new delivery model for information processing, Cloud Computing, with an on-demand provisioning of computational [...]

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Using libguestfs to migrate images to cloud

In a previous post, I described some difficulties regarding manipulating VM images. Problems included mounting filesystems supported by the VM but not the host, and file permissions for those systems that were supported. One suggestion was to mount the image in another VM that would allow for complete control. Lucky for us, it turns out [...]

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Reserved or On-Demand Instances? A Revenue Maximization Model for Cloud Providers

Cloud providers who operate large and medium-scale data centers and offer their services on a pay-per-usage basis face a challenging problem of running data centers in an energy- efficient manner while ensuring that customers’ expectations in terms of availability are met. Cloud providers benefit from significant economies of scale, since they operate large infrastructures shared [...]

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Kernel 32 vs 64 discovery

We were recently given a VirtualBox image configured to run the HPCC benchmark suite. The code to determine the OS architecture is pretty naive, and we paid for it. The code simply checked for the presence of the substring ‘amd64′ in the kernel name. The image didn’t have it, so it was migrated to EC2 [...]

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Amazon’s EC2 cloud computing service down the fourth day

I am a happy and loyal user of Dropbox.com. Well, I was at least. When hovering over the Dropbox icon, I only see “Dropbox 0.7.110 Connecting…..” lately. Weird, I thought. Well, no problem, fire up Firefox and check out Dropbox’s web page to see what is going on. Good try, but also a complete waste [...]

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Cloud computing – a disruptive new business model

As organizations increase their offerings of digital services, the demand for computing and storage capability increases. Also the need for faster, more complex data processing is becoming widespread. Additional demand for computing capability can only be met by increasing the processing capacity of servers within data centers. Along with greater computing capability, businesses have increased [...]

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Microsoft White Paper – Economic Benefits of Cloud Computing

Microsoft has recently, in November 2010,  published a white paper with the title “The Economics of the Cloud”. In this white paper the authors mention the following potential cost savings for organisations: Cloud also allows core IT infrastructure to be brought into large data centers that take advantage of significant economies of scale in three [...]

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Xen and VirtualBox: Oil and Water

Today I needed to start a couple of long-lived jobs running in VirtualBox instances. The images are 64bit, and the only spare host we have around is Xen with a Debian Squeeze dom0. OK I thought, let’s give VirtualBox on Xen a go. I downloaded the Debian 4.0.4 package from the VirtualBox site and attempted [...]

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EC2 Deployment and Lifecycle API

I’ve just finished my first working draft of a python API to describe and execute an EC2 deployment with a controlled lifecycle. This is part of the larger Desktop-to-Cloud (D2C) project, aimed at assisting researchers with deploying scientific, job-based applications to the cloud.

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Risks and rewards of moving applications to the cloud

We have recently come across an interesting discussion group called “Cloudusecases.org”. It has published two white papers titled “Cloud Computing Use Cases White Paper” and “Moving to the Cloud – Risks and rewards of moving applications to the cloud“. Both papers are very interesting and informative. Especially the second one suggests the following very straight [...]

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