Archive | May, 2011

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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