Download Cloud Computing: Third International Conference, CloudComp by Daniel Rubio Bonilla, Lutz Schubert, Stefan Wesner (auth.), PDF

By Daniel Rubio Bonilla, Lutz Schubert, Stefan Wesner (auth.), Mazin Yousif, Lutz Schubert (eds.)

This publication constitutes the completely refereed publish convention complaints of the 3rd foreign convention on Cloud Computing, Cloud Comp 2012, held in Vienna, Austria, in September 2012. The 14 revised complete papers have been rigorously reviewed and chosen from quite a few submissions and canopy a number of subject matters within the software of cloud computing technologies.

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Extra info for Cloud Computing: Third International Conference, CloudComp 2012, Vienna, Austria, September 24-26, 2012, Revised Selected Papers

Example text

4. Repulsion We assume that a virtual system contains at least one VM that acts as a firewall. Typically, a firewall requires high bandwidth because all traffic to and from associated networks pass through it. Therefore, placing multiple VM firewalls on the same host is generally undesirable. This plug-in module considers competition for network bandwidth as a cost. Evaluated cost will be: B2, if a firewall VM is placed with other firewall VMs 0, otherwise Note: The value of B is proportional to the number of VM firewalls on the host.

Moreover, any system for determining VM placement must be sufficiently flexible to respond to changes in economic, political, and social conditions, such as the rising cost of energy, preferential taxation systems for ecological initiatives, regulations requiring the restriction of CO2 emissions, and other responses to global warming and climate change. For example, data centers in Japan had to respond to restricted electricity supply after the earthquake and tsunami, which occurred in March, 2011.

This is a typical situation for multiple VMs owned by a single tenant in a multi-tenant data center.  Repulsion: VMs that compete for resources should not be placed on the same host. For example, VMs requiring higher network bandwidth should be placed repulsively to avoid network congestion. Firewalls are a typical example. Design and Implementation of a Multi-objective Optimization Mechanism 23  Minimum migration cost: This policy determines VMs that should be migrated from one host to another host.

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